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1 | 1 | # templater.py - template expansion for output |
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2 | 2 | # |
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3 | 3 | # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | """Slightly complicated template engine for commands and hgweb |
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9 | 9 | |
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10 | 10 | This module provides low-level interface to the template engine. See the |
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11 | 11 | formatter and cmdutil modules if you are looking for high-level functions |
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12 | 12 | such as ``cmdutil.rendertemplate(ctx, tmpl)``. |
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13 | 13 | |
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14 | 14 | Internal Data Types |
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15 | 15 | ------------------- |
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16 | 16 | |
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17 | 17 | Template keywords and functions take a dictionary of current symbols and |
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18 | 18 | resources (a "mapping") and return result. Inputs and outputs must be one |
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19 | 19 | of the following data types: |
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20 | 20 | |
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21 | 21 | bytes |
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22 | 22 | a byte string, which is generally a human-readable text in local encoding. |
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23 | 23 | |
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24 | 24 | generator |
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25 | 25 | a lazily-evaluated byte string, which is a possibly nested generator of |
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26 | 26 | values of any printable types, and will be folded by ``stringify()`` |
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27 | 27 | or ``flatten()``. |
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28 | 28 | |
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29 | 29 | BUG: hgweb overloads this type for mappings (i.e. some hgweb keywords |
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30 | 30 | returns a generator of dicts.) |
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31 | 31 | |
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32 | 32 | None |
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33 | 33 | sometimes represents an empty value, which can be stringified to ''. |
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34 | 34 | |
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35 | 35 | True, False, int, float |
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36 | 36 | can be stringified as such. |
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37 | 37 | |
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38 | 38 | date tuple |
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39 | 39 | a (unixtime, offset) tuple, which produces no meaningful output by itself. |
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40 | 40 | |
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41 | 41 | hybrid |
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42 | 42 | represents a list/dict of printable values, which can also be converted |
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43 | 43 | to mappings by % operator. |
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44 | 44 | |
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45 | 45 | mappable |
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46 | 46 | represents a scalar printable value, also supports % operator. |
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47 | 47 | """ |
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48 | 48 | |
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49 | 49 | from __future__ import absolute_import, print_function |
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50 | 50 | |
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51 | 51 | import abc |
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52 | 52 | import os |
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53 | 53 | |
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54 | 54 | from .i18n import _ |
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55 | 55 | from . import ( |
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56 | 56 | config, |
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57 | 57 | encoding, |
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58 | 58 | error, |
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59 | 59 | parser, |
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60 | 60 | pycompat, |
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61 | 61 | templatefilters, |
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62 | 62 | templatefuncs, |
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63 | 63 | templateutil, |
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64 | 64 | util, |
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65 | 65 | ) |
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66 | 66 | from .utils import ( |
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67 | 67 | stringutil, |
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68 | 68 | ) |
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69 | 69 | |
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70 | 70 | # template parsing |
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71 | 71 | |
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72 | 72 | elements = { |
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73 | 73 | # token-type: binding-strength, primary, prefix, infix, suffix |
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74 | 74 | "(": (20, None, ("group", 1, ")"), ("func", 1, ")"), None), |
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75 | 75 | ".": (18, None, None, (".", 18), None), |
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76 | 76 | "%": (15, None, None, ("%", 15), None), |
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77 | 77 | "|": (15, None, None, ("|", 15), None), |
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78 | 78 | "*": (5, None, None, ("*", 5), None), |
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79 | 79 | "/": (5, None, None, ("/", 5), None), |
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80 | 80 | "+": (4, None, None, ("+", 4), None), |
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81 | 81 | "-": (4, None, ("negate", 19), ("-", 4), None), |
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82 | 82 | "=": (3, None, None, ("keyvalue", 3), None), |
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83 | 83 | ",": (2, None, None, ("list", 2), None), |
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84 | 84 | ")": (0, None, None, None, None), |
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85 | 85 | "integer": (0, "integer", None, None, None), |
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86 | 86 | "symbol": (0, "symbol", None, None, None), |
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87 | 87 | "string": (0, "string", None, None, None), |
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88 | 88 | "template": (0, "template", None, None, None), |
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89 | 89 | "end": (0, None, None, None, None), |
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90 | 90 | } |
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91 | 91 | |
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92 | 92 | def tokenize(program, start, end, term=None): |
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93 | 93 | """Parse a template expression into a stream of tokens, which must end |
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94 | 94 | with term if specified""" |
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95 | 95 | pos = start |
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96 | 96 | program = pycompat.bytestr(program) |
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97 | 97 | while pos < end: |
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98 | 98 | c = program[pos] |
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99 | 99 | if c.isspace(): # skip inter-token whitespace |
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100 | 100 | pass |
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101 | 101 | elif c in "(=,).%|+-*/": # handle simple operators |
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102 | 102 | yield (c, None, pos) |
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103 | 103 | elif c in '"\'': # handle quoted templates |
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104 | 104 | s = pos + 1 |
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105 | 105 | data, pos = _parsetemplate(program, s, end, c) |
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106 | 106 | yield ('template', data, s) |
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107 | 107 | pos -= 1 |
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108 | 108 | elif c == 'r' and program[pos:pos + 2] in ("r'", 'r"'): |
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109 | 109 | # handle quoted strings |
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110 | 110 | c = program[pos + 1] |
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111 | 111 | s = pos = pos + 2 |
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112 | 112 | while pos < end: # find closing quote |
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113 | 113 | d = program[pos] |
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114 | 114 | if d == '\\': # skip over escaped characters |
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115 | 115 | pos += 2 |
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116 | 116 | continue |
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117 | 117 | if d == c: |
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118 | 118 | yield ('string', program[s:pos], s) |
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119 | 119 | break |
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120 | 120 | pos += 1 |
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121 | 121 | else: |
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122 | 122 | raise error.ParseError(_("unterminated string"), s) |
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123 | 123 | elif c.isdigit(): |
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124 | 124 | s = pos |
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125 | 125 | while pos < end: |
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126 | 126 | d = program[pos] |
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127 | 127 | if not d.isdigit(): |
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128 | 128 | break |
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129 | 129 | pos += 1 |
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130 | 130 | yield ('integer', program[s:pos], s) |
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131 | 131 | pos -= 1 |
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132 | 132 | elif (c == '\\' and program[pos:pos + 2] in (br"\'", br'\"') |
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133 | 133 | or c == 'r' and program[pos:pos + 3] in (br"r\'", br'r\"')): |
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134 | 134 | # handle escaped quoted strings for compatibility with 2.9.2-3.4, |
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135 | 135 | # where some of nested templates were preprocessed as strings and |
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136 | 136 | # then compiled. therefore, \"...\" was allowed. (issue4733) |
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137 | 137 | # |
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138 | 138 | # processing flow of _evalifliteral() at 5ab28a2e9962: |
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139 | 139 | # outer template string -> stringify() -> compiletemplate() |
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140 | 140 | # ------------------------ ------------ ------------------ |
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141 | 141 | # {f("\\\\ {g(\"\\\"\")}"} \\ {g("\"")} [r'\\', {g("\"")}] |
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142 | 142 | # ~~~~~~~~ |
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143 | 143 | # escaped quoted string |
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144 | 144 | if c == 'r': |
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145 | 145 | pos += 1 |
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146 | 146 | token = 'string' |
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147 | 147 | else: |
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148 | 148 | token = 'template' |
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149 | 149 | quote = program[pos:pos + 2] |
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150 | 150 | s = pos = pos + 2 |
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151 | 151 | while pos < end: # find closing escaped quote |
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152 | 152 | if program.startswith('\\\\\\', pos, end): |
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153 | 153 | pos += 4 # skip over double escaped characters |
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154 | 154 | continue |
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155 | 155 | if program.startswith(quote, pos, end): |
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156 | 156 | # interpret as if it were a part of an outer string |
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157 | 157 | data = parser.unescapestr(program[s:pos]) |
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158 | 158 | if token == 'template': |
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159 | 159 | data = _parsetemplate(data, 0, len(data))[0] |
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160 | 160 | yield (token, data, s) |
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161 | 161 | pos += 1 |
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162 | 162 | break |
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163 | 163 | pos += 1 |
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164 | 164 | else: |
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165 | 165 | raise error.ParseError(_("unterminated string"), s) |
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166 | 166 | elif c.isalnum() or c in '_': |
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167 | 167 | s = pos |
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168 | 168 | pos += 1 |
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169 | 169 | while pos < end: # find end of symbol |
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170 | 170 | d = program[pos] |
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171 | 171 | if not (d.isalnum() or d == "_"): |
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172 | 172 | break |
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173 | 173 | pos += 1 |
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174 | 174 | sym = program[s:pos] |
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175 | 175 | yield ('symbol', sym, s) |
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176 | 176 | pos -= 1 |
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177 | 177 | elif c == term: |
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178 | 178 | yield ('end', None, pos) |
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179 | 179 | return |
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180 | 180 | else: |
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181 | 181 | raise error.ParseError(_("syntax error"), pos) |
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182 | 182 | pos += 1 |
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183 | 183 | if term: |
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184 | 184 | raise error.ParseError(_("unterminated template expansion"), start) |
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185 | 185 | yield ('end', None, pos) |
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186 | 186 | |
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187 | 187 | def _parsetemplate(tmpl, start, stop, quote=''): |
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188 | 188 | r""" |
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189 | 189 | >>> _parsetemplate(b'foo{bar}"baz', 0, 12) |
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190 | 190 | ([('string', 'foo'), ('symbol', 'bar'), ('string', '"baz')], 12) |
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191 | 191 | >>> _parsetemplate(b'foo{bar}"baz', 0, 12, quote=b'"') |
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192 | 192 | ([('string', 'foo'), ('symbol', 'bar')], 9) |
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193 | 193 | >>> _parsetemplate(b'foo"{bar}', 0, 9, quote=b'"') |
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194 | 194 | ([('string', 'foo')], 4) |
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195 | 195 | >>> _parsetemplate(br'foo\"bar"baz', 0, 12, quote=b'"') |
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196 | 196 | ([('string', 'foo"'), ('string', 'bar')], 9) |
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197 | 197 | >>> _parsetemplate(br'foo\\"bar', 0, 10, quote=b'"') |
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198 | 198 | ([('string', 'foo\\')], 6) |
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199 | 199 | """ |
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200 | 200 | parsed = [] |
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201 | 201 | for typ, val, pos in _scantemplate(tmpl, start, stop, quote): |
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202 | 202 | if typ == 'string': |
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203 | 203 | parsed.append((typ, val)) |
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204 | 204 | elif typ == 'template': |
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205 | 205 | parsed.append(val) |
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206 | 206 | elif typ == 'end': |
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207 | 207 | return parsed, pos |
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208 | 208 | else: |
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209 | 209 | raise error.ProgrammingError('unexpected type: %s' % typ) |
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210 | 210 | raise error.ProgrammingError('unterminated scanning of template') |
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211 | 211 | |
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212 | 212 | def scantemplate(tmpl, raw=False): |
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213 | 213 | r"""Scan (type, start, end) positions of outermost elements in template |
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214 | 214 | |
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215 | 215 | If raw=True, a backslash is not taken as an escape character just like |
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216 | 216 | r'' string in Python. Note that this is different from r'' literal in |
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217 | 217 | template in that no template fragment can appear in r'', e.g. r'{foo}' |
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218 | 218 | is a literal '{foo}', but ('{foo}', raw=True) is a template expression |
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219 | 219 | 'foo'. |
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220 | 220 | |
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221 | 221 | >>> list(scantemplate(b'foo{bar}"baz')) |
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222 | 222 | [('string', 0, 3), ('template', 3, 8), ('string', 8, 12)] |
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223 | 223 | >>> list(scantemplate(b'outer{"inner"}outer')) |
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224 | 224 | [('string', 0, 5), ('template', 5, 14), ('string', 14, 19)] |
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225 | 225 | >>> list(scantemplate(b'foo\\{escaped}')) |
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226 | 226 | [('string', 0, 5), ('string', 5, 13)] |
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227 | 227 | >>> list(scantemplate(b'foo\\{escaped}', raw=True)) |
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228 | 228 | [('string', 0, 4), ('template', 4, 13)] |
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229 | 229 | """ |
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230 | 230 | last = None |
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231 | 231 | for typ, val, pos in _scantemplate(tmpl, 0, len(tmpl), raw=raw): |
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232 | 232 | if last: |
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233 | 233 | yield last + (pos,) |
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234 | 234 | if typ == 'end': |
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235 | 235 | return |
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236 | 236 | else: |
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237 | 237 | last = (typ, pos) |
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238 | 238 | raise error.ProgrammingError('unterminated scanning of template') |
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239 | 239 | |
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240 | 240 | def _scantemplate(tmpl, start, stop, quote='', raw=False): |
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241 | 241 | """Parse template string into chunks of strings and template expressions""" |
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242 | 242 | sepchars = '{' + quote |
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243 | 243 | unescape = [parser.unescapestr, pycompat.identity][raw] |
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244 | 244 | pos = start |
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245 | 245 | p = parser.parser(elements) |
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246 | 246 | try: |
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247 | 247 | while pos < stop: |
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248 | 248 | n = min((tmpl.find(c, pos, stop) for c in sepchars), |
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249 | 249 | key=lambda n: (n < 0, n)) |
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250 | 250 | if n < 0: |
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251 | 251 | yield ('string', unescape(tmpl[pos:stop]), pos) |
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252 | 252 | pos = stop |
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253 | 253 | break |
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254 | 254 | c = tmpl[n:n + 1] |
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255 | 255 | bs = 0 # count leading backslashes |
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256 | 256 | if not raw: |
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257 | 257 | bs = (n - pos) - len(tmpl[pos:n].rstrip('\\')) |
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258 | 258 | if bs % 2 == 1: |
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259 | 259 | # escaped (e.g. '\{', '\\\{', but not '\\{') |
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260 | 260 | yield ('string', unescape(tmpl[pos:n - 1]) + c, pos) |
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261 | 261 | pos = n + 1 |
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262 | 262 | continue |
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263 | 263 | if n > pos: |
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264 | 264 | yield ('string', unescape(tmpl[pos:n]), pos) |
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265 | 265 | if c == quote: |
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266 | 266 | yield ('end', None, n + 1) |
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267 | 267 | return |
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268 | 268 | |
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269 | 269 | parseres, pos = p.parse(tokenize(tmpl, n + 1, stop, '}')) |
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270 | 270 | if not tmpl.startswith('}', pos): |
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271 | 271 | raise error.ParseError(_("invalid token"), pos) |
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272 | 272 | yield ('template', parseres, n) |
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273 | 273 | pos += 1 |
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274 | 274 | |
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275 | 275 | if quote: |
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276 | 276 | raise error.ParseError(_("unterminated string"), start) |
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277 | 277 | except error.ParseError as inst: |
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278 | 278 | if len(inst.args) > 1: # has location |
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279 | 279 | loc = inst.args[1] |
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280 | 280 | # Offset the caret location by the number of newlines before the |
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281 | 281 | # location of the error, since we will replace one-char newlines |
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282 | 282 | # with the two-char literal r'\n'. |
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283 | 283 | offset = tmpl[:loc].count('\n') |
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284 | 284 | tmpl = tmpl.replace('\n', br'\n') |
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285 | 285 | # We want the caret to point to the place in the template that |
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286 | 286 | # failed to parse, but in a hint we get a open paren at the |
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287 | 287 | # start. Therefore, we print "loc + 1" spaces (instead of "loc") |
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288 | 288 | # to line up the caret with the location of the error. |
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289 | 289 | inst.hint = (tmpl + '\n' |
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290 | 290 | + ' ' * (loc + 1 + offset) + '^ ' + _('here')) |
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291 | 291 | raise |
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292 | 292 | yield ('end', None, pos) |
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293 | 293 | |
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294 | 294 | def _unnesttemplatelist(tree): |
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295 | 295 | """Expand list of templates to node tuple |
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296 | 296 | |
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297 | 297 | >>> def f(tree): |
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298 | 298 | ... print(pycompat.sysstr(prettyformat(_unnesttemplatelist(tree)))) |
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299 | 299 | >>> f((b'template', [])) |
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300 | 300 | (string '') |
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301 | 301 | >>> f((b'template', [(b'string', b'foo')])) |
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302 | 302 | (string 'foo') |
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303 | 303 | >>> f((b'template', [(b'string', b'foo'), (b'symbol', b'rev')])) |
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304 | 304 | (template |
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305 | 305 | (string 'foo') |
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306 | 306 | (symbol 'rev')) |
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307 | 307 | >>> f((b'template', [(b'symbol', b'rev')])) # template(rev) -> str |
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308 | 308 | (template |
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309 | 309 | (symbol 'rev')) |
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310 | 310 | >>> f((b'template', [(b'template', [(b'string', b'foo')])])) |
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311 | 311 | (string 'foo') |
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312 | 312 | """ |
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313 | 313 | if not isinstance(tree, tuple): |
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314 | 314 | return tree |
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315 | 315 | op = tree[0] |
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316 | 316 | if op != 'template': |
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317 | 317 | return (op,) + tuple(_unnesttemplatelist(x) for x in tree[1:]) |
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318 | 318 | |
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319 | 319 | assert len(tree) == 2 |
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320 | 320 | xs = tuple(_unnesttemplatelist(x) for x in tree[1]) |
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321 | 321 | if not xs: |
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322 | 322 | return ('string', '') # empty template "" |
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323 | 323 | elif len(xs) == 1 and xs[0][0] == 'string': |
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324 | 324 | return xs[0] # fast path for string with no template fragment "x" |
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325 | 325 | else: |
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326 | 326 | return (op,) + xs |
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327 | 327 | |
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328 | 328 | def parse(tmpl): |
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329 | 329 | """Parse template string into tree""" |
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330 | 330 | parsed, pos = _parsetemplate(tmpl, 0, len(tmpl)) |
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331 | 331 | assert pos == len(tmpl), 'unquoted template should be consumed' |
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332 | 332 | return _unnesttemplatelist(('template', parsed)) |
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333 | 333 | |
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334 | 334 | def _parseexpr(expr): |
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335 | 335 | """Parse a template expression into tree |
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336 | 336 | |
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337 | 337 | >>> _parseexpr(b'"foo"') |
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338 | 338 | ('string', 'foo') |
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339 | 339 | >>> _parseexpr(b'foo(bar)') |
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340 | 340 | ('func', ('symbol', 'foo'), ('symbol', 'bar')) |
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341 | 341 | >>> _parseexpr(b'foo(') |
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342 | 342 | Traceback (most recent call last): |
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343 | 343 | ... |
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344 | 344 | ParseError: ('not a prefix: end', 4) |
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345 | 345 | >>> _parseexpr(b'"foo" "bar"') |
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346 | 346 | Traceback (most recent call last): |
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347 | 347 | ... |
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348 | 348 | ParseError: ('invalid token', 7) |
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349 | 349 | """ |
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350 | 350 | p = parser.parser(elements) |
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351 | 351 | tree, pos = p.parse(tokenize(expr, 0, len(expr))) |
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352 | 352 | if pos != len(expr): |
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353 | 353 | raise error.ParseError(_('invalid token'), pos) |
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354 | 354 | return _unnesttemplatelist(tree) |
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355 | 355 | |
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356 | 356 | def prettyformat(tree): |
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357 | 357 | return parser.prettyformat(tree, ('integer', 'string', 'symbol')) |
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358 | 358 | |
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359 | 359 | def compileexp(exp, context, curmethods): |
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360 | 360 | """Compile parsed template tree to (func, data) pair""" |
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361 | 361 | if not exp: |
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362 | 362 | raise error.ParseError(_("missing argument")) |
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363 | 363 | t = exp[0] |
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364 | 364 | if t in curmethods: |
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365 | 365 | return curmethods[t](exp, context) |
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366 | 366 | raise error.ParseError(_("unknown method '%s'") % t) |
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367 | 367 | |
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368 | 368 | # template evaluation |
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369 | 369 | |
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370 | 370 | def getsymbol(exp): |
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371 | 371 | if exp[0] == 'symbol': |
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372 | 372 | return exp[1] |
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373 | 373 | raise error.ParseError(_("expected a symbol, got '%s'") % exp[0]) |
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374 | 374 | |
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375 | 375 | def getlist(x): |
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376 | 376 | if not x: |
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377 | 377 | return [] |
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378 | 378 | if x[0] == 'list': |
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379 | 379 | return getlist(x[1]) + [x[2]] |
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380 | 380 | return [x] |
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381 | 381 | |
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382 | 382 | def gettemplate(exp, context): |
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383 | 383 | """Compile given template tree or load named template from map file; |
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384 | 384 | returns (func, data) pair""" |
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385 | 385 | if exp[0] in ('template', 'string'): |
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386 | 386 | return compileexp(exp, context, methods) |
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387 | 387 | if exp[0] == 'symbol': |
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388 | 388 | # unlike runsymbol(), here 'symbol' is always taken as template name |
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389 | 389 | # even if it exists in mapping. this allows us to override mapping |
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390 | 390 | # by web templates, e.g. 'changelogtag' is redefined in map file. |
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391 | 391 | return context._load(exp[1]) |
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392 | 392 | raise error.ParseError(_("expected template specifier")) |
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393 | 393 | |
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394 | 394 | def _runrecursivesymbol(context, mapping, key): |
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395 | 395 | raise error.Abort(_("recursive reference '%s' in template") % key) |
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396 | 396 | |
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397 | 397 | def buildtemplate(exp, context): |
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398 | 398 | ctmpl = [compileexp(e, context, methods) for e in exp[1:]] |
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399 | 399 | return (templateutil.runtemplate, ctmpl) |
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400 | 400 | |
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401 | 401 | def buildfilter(exp, context): |
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402 | 402 | n = getsymbol(exp[2]) |
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403 | 403 | if n in context._filters: |
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404 | 404 | filt = context._filters[n] |
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405 | 405 | arg = compileexp(exp[1], context, methods) |
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406 | 406 | return (templateutil.runfilter, (arg, filt)) |
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407 | 407 | if n in context._funcs: |
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408 | 408 | f = context._funcs[n] |
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409 | 409 | args = _buildfuncargs(exp[1], context, methods, n, f._argspec) |
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410 | 410 | return (f, args) |
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411 | 411 | raise error.ParseError(_("unknown function '%s'") % n) |
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412 | 412 | |
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413 | 413 | def buildmap(exp, context): |
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414 | 414 | darg = compileexp(exp[1], context, methods) |
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415 | 415 | targ = gettemplate(exp[2], context) |
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416 | 416 | return (templateutil.runmap, (darg, targ)) |
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417 | 417 | |
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418 | 418 | def buildmember(exp, context): |
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419 | 419 | darg = compileexp(exp[1], context, methods) |
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420 | 420 | memb = getsymbol(exp[2]) |
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421 | 421 | return (templateutil.runmember, (darg, memb)) |
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422 | 422 | |
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423 | 423 | def buildnegate(exp, context): |
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424 | 424 | arg = compileexp(exp[1], context, exprmethods) |
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425 | 425 | return (templateutil.runnegate, arg) |
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426 | 426 | |
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427 | 427 | def buildarithmetic(exp, context, func): |
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428 | 428 | left = compileexp(exp[1], context, exprmethods) |
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429 | 429 | right = compileexp(exp[2], context, exprmethods) |
|
430 | 430 | return (templateutil.runarithmetic, (func, left, right)) |
|
431 | 431 | |
|
432 | 432 | def buildfunc(exp, context): |
|
433 | 433 | n = getsymbol(exp[1]) |
|
434 | 434 | if n in context._funcs: |
|
435 | 435 | f = context._funcs[n] |
|
436 | 436 | args = _buildfuncargs(exp[2], context, exprmethods, n, f._argspec) |
|
437 | 437 | return (f, args) |
|
438 | 438 | if n in context._filters: |
|
439 | 439 | args = _buildfuncargs(exp[2], context, exprmethods, n, argspec=None) |
|
440 | 440 | if len(args) != 1: |
|
441 | 441 | raise error.ParseError(_("filter %s expects one argument") % n) |
|
442 | 442 | f = context._filters[n] |
|
443 | 443 | return (templateutil.runfilter, (args[0], f)) |
|
444 | 444 | raise error.ParseError(_("unknown function '%s'") % n) |
|
445 | 445 | |
|
446 | 446 | def _buildfuncargs(exp, context, curmethods, funcname, argspec): |
|
447 | 447 | """Compile parsed tree of function arguments into list or dict of |
|
448 | 448 | (func, data) pairs |
|
449 | 449 | |
|
450 | 450 | >>> context = engine(lambda t: (templateutil.runsymbol, t)) |
|
451 | 451 | >>> def fargs(expr, argspec): |
|
452 | 452 | ... x = _parseexpr(expr) |
|
453 | 453 | ... n = getsymbol(x[1]) |
|
454 | 454 | ... return _buildfuncargs(x[2], context, exprmethods, n, argspec) |
|
455 | 455 | >>> list(fargs(b'a(l=1, k=2)', b'k l m').keys()) |
|
456 | 456 | ['l', 'k'] |
|
457 | 457 | >>> args = fargs(b'a(opts=1, k=2)', b'**opts') |
|
458 | 458 | >>> list(args.keys()), list(args[b'opts'].keys()) |
|
459 | 459 | (['opts'], ['opts', 'k']) |
|
460 | 460 | """ |
|
461 | 461 | def compiledict(xs): |
|
462 | 462 | return util.sortdict((k, compileexp(x, context, curmethods)) |
|
463 | 463 | for k, x in xs.iteritems()) |
|
464 | 464 | def compilelist(xs): |
|
465 | 465 | return [compileexp(x, context, curmethods) for x in xs] |
|
466 | 466 | |
|
467 | 467 | if not argspec: |
|
468 | 468 | # filter or function with no argspec: return list of positional args |
|
469 | 469 | return compilelist(getlist(exp)) |
|
470 | 470 | |
|
471 | 471 | # function with argspec: return dict of named args |
|
472 | 472 | _poskeys, varkey, _keys, optkey = argspec = parser.splitargspec(argspec) |
|
473 | 473 | treeargs = parser.buildargsdict(getlist(exp), funcname, argspec, |
|
474 | 474 | keyvaluenode='keyvalue', keynode='symbol') |
|
475 | 475 | compargs = util.sortdict() |
|
476 | 476 | if varkey: |
|
477 | 477 | compargs[varkey] = compilelist(treeargs.pop(varkey)) |
|
478 | 478 | if optkey: |
|
479 | 479 | compargs[optkey] = compiledict(treeargs.pop(optkey)) |
|
480 | 480 | compargs.update(compiledict(treeargs)) |
|
481 | 481 | return compargs |
|
482 | 482 | |
|
483 | 483 | def buildkeyvaluepair(exp, content): |
|
484 | 484 | raise error.ParseError(_("can't use a key-value pair in this context")) |
|
485 | 485 | |
|
486 | 486 | # methods to interpret function arguments or inner expressions (e.g. {_(x)}) |
|
487 | 487 | exprmethods = { |
|
488 | 488 | "integer": lambda e, c: (templateutil.runinteger, e[1]), |
|
489 | 489 | "string": lambda e, c: (templateutil.runstring, e[1]), |
|
490 | 490 | "symbol": lambda e, c: (templateutil.runsymbol, e[1]), |
|
491 | 491 | "template": buildtemplate, |
|
492 | 492 | "group": lambda e, c: compileexp(e[1], c, exprmethods), |
|
493 | 493 | ".": buildmember, |
|
494 | 494 | "|": buildfilter, |
|
495 | 495 | "%": buildmap, |
|
496 | 496 | "func": buildfunc, |
|
497 | 497 | "keyvalue": buildkeyvaluepair, |
|
498 | 498 | "+": lambda e, c: buildarithmetic(e, c, lambda a, b: a + b), |
|
499 | 499 | "-": lambda e, c: buildarithmetic(e, c, lambda a, b: a - b), |
|
500 | 500 | "negate": buildnegate, |
|
501 | 501 | "*": lambda e, c: buildarithmetic(e, c, lambda a, b: a * b), |
|
502 | 502 | "/": lambda e, c: buildarithmetic(e, c, lambda a, b: a // b), |
|
503 | 503 | } |
|
504 | 504 | |
|
505 | 505 | # methods to interpret top-level template (e.g. {x}, {x|_}, {x % "y"}) |
|
506 | 506 | methods = exprmethods.copy() |
|
507 | 507 | methods["integer"] = exprmethods["symbol"] # '{1}' as variable |
|
508 | 508 | |
|
509 | 509 | class _aliasrules(parser.basealiasrules): |
|
510 | 510 | """Parsing and expansion rule set of template aliases""" |
|
511 | 511 | _section = _('template alias') |
|
512 | 512 | _parse = staticmethod(_parseexpr) |
|
513 | 513 | |
|
514 | 514 | @staticmethod |
|
515 | 515 | def _trygetfunc(tree): |
|
516 | 516 | """Return (name, args) if tree is func(...) or ...|filter; otherwise |
|
517 | 517 | None""" |
|
518 | 518 | if tree[0] == 'func' and tree[1][0] == 'symbol': |
|
519 | 519 | return tree[1][1], getlist(tree[2]) |
|
520 | 520 | if tree[0] == '|' and tree[2][0] == 'symbol': |
|
521 | 521 | return tree[2][1], [tree[1]] |
|
522 | 522 | |
|
523 | 523 | def expandaliases(tree, aliases): |
|
524 | 524 | """Return new tree of aliases are expanded""" |
|
525 | 525 | aliasmap = _aliasrules.buildmap(aliases) |
|
526 | 526 | return _aliasrules.expand(aliasmap, tree) |
|
527 | 527 | |
|
528 | 528 | # template engine |
|
529 | 529 | |
|
530 | def _flatten(thing): | |
|
531 | '''yield a single stream from a possibly nested set of iterators''' | |
|
532 | thing = templateutil.unwraphybrid(thing) | |
|
533 | if isinstance(thing, bytes): | |
|
534 | yield thing | |
|
535 | elif isinstance(thing, str): | |
|
536 | # We can only hit this on Python 3, and it's here to guard | |
|
537 | # against infinite recursion. | |
|
538 | raise error.ProgrammingError('Mercurial IO including templates is done' | |
|
539 | ' with bytes, not strings, got %r' % thing) | |
|
540 | elif thing is None: | |
|
541 | pass | |
|
542 | elif not util.safehasattr(thing, '__iter__'): | |
|
543 | yield pycompat.bytestr(thing) | |
|
544 | else: | |
|
545 | for i in thing: | |
|
546 | i = templateutil.unwraphybrid(i) | |
|
547 | if isinstance(i, bytes): | |
|
548 | yield i | |
|
549 | elif i is None: | |
|
550 | pass | |
|
551 | elif not util.safehasattr(i, '__iter__'): | |
|
552 | yield pycompat.bytestr(i) | |
|
553 | else: | |
|
554 | for j in _flatten(i): | |
|
555 | yield j | |
|
556 | ||
|
557 | 530 | def unquotestring(s): |
|
558 | 531 | '''unwrap quotes if any; otherwise returns unmodified string''' |
|
559 | 532 | if len(s) < 2 or s[0] not in "'\"" or s[0] != s[-1]: |
|
560 | 533 | return s |
|
561 | 534 | return s[1:-1] |
|
562 | 535 | |
|
563 | 536 | class resourcemapper(object): |
|
564 | 537 | """Mapper of internal template resources""" |
|
565 | 538 | |
|
566 | 539 | __metaclass__ = abc.ABCMeta |
|
567 | 540 | |
|
568 | 541 | @abc.abstractmethod |
|
569 | 542 | def availablekeys(self, context, mapping): |
|
570 | 543 | """Return a set of available resource keys based on the given mapping""" |
|
571 | 544 | |
|
572 | 545 | @abc.abstractmethod |
|
573 | 546 | def knownkeys(self): |
|
574 | 547 | """Return a set of supported resource keys""" |
|
575 | 548 | |
|
576 | 549 | @abc.abstractmethod |
|
577 | 550 | def lookup(self, context, mapping, key): |
|
578 | 551 | """Return a resource for the key if available; otherwise None""" |
|
579 | 552 | |
|
580 | 553 | @abc.abstractmethod |
|
581 | 554 | def populatemap(self, context, origmapping, newmapping): |
|
582 | 555 | """Return a dict of additional mapping items which should be paired |
|
583 | 556 | with the given new mapping""" |
|
584 | 557 | |
|
585 | 558 | class nullresourcemapper(resourcemapper): |
|
586 | 559 | def availablekeys(self, context, mapping): |
|
587 | 560 | return set() |
|
588 | 561 | |
|
589 | 562 | def knownkeys(self): |
|
590 | 563 | return set() |
|
591 | 564 | |
|
592 | 565 | def lookup(self, context, mapping, key): |
|
593 | 566 | return None |
|
594 | 567 | |
|
595 | 568 | def populatemap(self, context, origmapping, newmapping): |
|
596 | 569 | return {} |
|
597 | 570 | |
|
598 | 571 | class engine(object): |
|
599 | 572 | '''template expansion engine. |
|
600 | 573 | |
|
601 | 574 | template expansion works like this. a map file contains key=value |
|
602 | 575 | pairs. if value is quoted, it is treated as string. otherwise, it |
|
603 | 576 | is treated as name of template file. |
|
604 | 577 | |
|
605 | 578 | templater is asked to expand a key in map. it looks up key, and |
|
606 | 579 | looks for strings like this: {foo}. it expands {foo} by looking up |
|
607 | 580 | foo in map, and substituting it. expansion is recursive: it stops |
|
608 | 581 | when there is no more {foo} to replace. |
|
609 | 582 | |
|
610 | 583 | expansion also allows formatting and filtering. |
|
611 | 584 | |
|
612 | 585 | format uses key to expand each item in list. syntax is |
|
613 | 586 | {key%format}. |
|
614 | 587 | |
|
615 | 588 | filter uses function to transform value. syntax is |
|
616 | 589 | {key|filter1|filter2|...}.''' |
|
617 | 590 | |
|
618 | 591 | def __init__(self, loader, filters=None, defaults=None, resources=None, |
|
619 | 592 | aliases=()): |
|
620 | 593 | self._loader = loader |
|
621 | 594 | if filters is None: |
|
622 | 595 | filters = {} |
|
623 | 596 | self._filters = filters |
|
624 | 597 | self._funcs = templatefuncs.funcs # make this a parameter if needed |
|
625 | 598 | if defaults is None: |
|
626 | 599 | defaults = {} |
|
627 | 600 | if resources is None: |
|
628 | 601 | resources = nullresourcemapper() |
|
629 | 602 | self._defaults = defaults |
|
630 | 603 | self._resources = resources |
|
631 | 604 | self._aliasmap = _aliasrules.buildmap(aliases) |
|
632 | 605 | self._cache = {} # key: (func, data) |
|
633 | 606 | |
|
634 | 607 | def overlaymap(self, origmapping, newmapping): |
|
635 | 608 | """Create combined mapping from the original mapping and partial |
|
636 | 609 | mapping to override the original""" |
|
637 | 610 | # do not copy symbols which overrides the defaults depending on |
|
638 | 611 | # new resources, so the defaults will be re-evaluated (issue5612) |
|
639 | 612 | knownres = self._resources.knownkeys() |
|
640 | 613 | newres = self._resources.availablekeys(self, newmapping) |
|
641 | 614 | mapping = {k: v for k, v in origmapping.iteritems() |
|
642 | 615 | if (k in knownres # not a symbol per self.symbol() |
|
643 | 616 | or newres.isdisjoint(self._defaultrequires(k)))} |
|
644 | 617 | mapping.update(newmapping) |
|
645 | 618 | mapping.update( |
|
646 | 619 | self._resources.populatemap(self, origmapping, newmapping)) |
|
647 | 620 | return mapping |
|
648 | 621 | |
|
649 | 622 | def _defaultrequires(self, key): |
|
650 | 623 | """Resource keys required by the specified default symbol function""" |
|
651 | 624 | v = self._defaults.get(key) |
|
652 | 625 | if v is None or not callable(v): |
|
653 | 626 | return () |
|
654 | 627 | return getattr(v, '_requires', ()) |
|
655 | 628 | |
|
656 | 629 | def symbol(self, mapping, key): |
|
657 | 630 | """Resolve symbol to value or function; None if nothing found""" |
|
658 | 631 | v = None |
|
659 | 632 | if key not in self._resources.knownkeys(): |
|
660 | 633 | v = mapping.get(key) |
|
661 | 634 | if v is None: |
|
662 | 635 | v = self._defaults.get(key) |
|
663 | 636 | return v |
|
664 | 637 | |
|
665 | 638 | def resource(self, mapping, key): |
|
666 | 639 | """Return internal data (e.g. cache) used for keyword/function |
|
667 | 640 | evaluation""" |
|
668 | 641 | v = self._resources.lookup(self, mapping, key) |
|
669 | 642 | if v is None: |
|
670 | 643 | raise templateutil.ResourceUnavailable( |
|
671 | 644 | _('template resource not available: %s') % key) |
|
672 | 645 | return v |
|
673 | 646 | |
|
674 | 647 | def _load(self, t): |
|
675 | 648 | '''load, parse, and cache a template''' |
|
676 | 649 | if t not in self._cache: |
|
677 | 650 | # put poison to cut recursion while compiling 't' |
|
678 | 651 | self._cache[t] = (_runrecursivesymbol, t) |
|
679 | 652 | try: |
|
680 | 653 | x = parse(self._loader(t)) |
|
681 | 654 | if self._aliasmap: |
|
682 | 655 | x = _aliasrules.expand(self._aliasmap, x) |
|
683 | 656 | self._cache[t] = compileexp(x, self, methods) |
|
684 | 657 | except: # re-raises |
|
685 | 658 | del self._cache[t] |
|
686 | 659 | raise |
|
687 | 660 | return self._cache[t] |
|
688 | 661 | |
|
689 | 662 | def preload(self, t): |
|
690 | 663 | """Load, parse, and cache the specified template if available""" |
|
691 | 664 | try: |
|
692 | 665 | self._load(t) |
|
693 | 666 | return True |
|
694 | 667 | except templateutil.TemplateNotFound: |
|
695 | 668 | return False |
|
696 | 669 | |
|
697 | 670 | def process(self, t, mapping): |
|
698 | 671 | '''Perform expansion. t is name of map element to expand. |
|
699 | 672 | mapping contains added elements for use during expansion. Is a |
|
700 | 673 | generator.''' |
|
701 | 674 | func, data = self._load(t) |
|
702 | 675 | # populate additional items only if they don't exist in the given |
|
703 | 676 | # mapping. this is slightly different from overlaymap() because the |
|
704 | 677 | # initial 'revcache' may contain pre-computed items. |
|
705 | 678 | extramapping = self._resources.populatemap(self, {}, mapping) |
|
706 | 679 | if extramapping: |
|
707 | 680 | extramapping.update(mapping) |
|
708 | 681 | mapping = extramapping |
|
709 |
return |
|
|
682 | return templateutil.flatten(func(self, mapping, data)) | |
|
710 | 683 | |
|
711 | 684 | engines = {'default': engine} |
|
712 | 685 | |
|
713 | 686 | def stylelist(): |
|
714 | 687 | paths = templatepaths() |
|
715 | 688 | if not paths: |
|
716 | 689 | return _('no templates found, try `hg debuginstall` for more info') |
|
717 | 690 | dirlist = os.listdir(paths[0]) |
|
718 | 691 | stylelist = [] |
|
719 | 692 | for file in dirlist: |
|
720 | 693 | split = file.split(".") |
|
721 | 694 | if split[-1] in ('orig', 'rej'): |
|
722 | 695 | continue |
|
723 | 696 | if split[0] == "map-cmdline": |
|
724 | 697 | stylelist.append(split[1]) |
|
725 | 698 | return ", ".join(sorted(stylelist)) |
|
726 | 699 | |
|
727 | 700 | def _readmapfile(mapfile): |
|
728 | 701 | """Load template elements from the given map file""" |
|
729 | 702 | if not os.path.exists(mapfile): |
|
730 | 703 | raise error.Abort(_("style '%s' not found") % mapfile, |
|
731 | 704 | hint=_("available styles: %s") % stylelist()) |
|
732 | 705 | |
|
733 | 706 | base = os.path.dirname(mapfile) |
|
734 | 707 | conf = config.config(includepaths=templatepaths()) |
|
735 | 708 | conf.read(mapfile, remap={'': 'templates'}) |
|
736 | 709 | |
|
737 | 710 | cache = {} |
|
738 | 711 | tmap = {} |
|
739 | 712 | aliases = [] |
|
740 | 713 | |
|
741 | 714 | val = conf.get('templates', '__base__') |
|
742 | 715 | if val and val[0] not in "'\"": |
|
743 | 716 | # treat as a pointer to a base class for this style |
|
744 | 717 | path = util.normpath(os.path.join(base, val)) |
|
745 | 718 | |
|
746 | 719 | # fallback check in template paths |
|
747 | 720 | if not os.path.exists(path): |
|
748 | 721 | for p in templatepaths(): |
|
749 | 722 | p2 = util.normpath(os.path.join(p, val)) |
|
750 | 723 | if os.path.isfile(p2): |
|
751 | 724 | path = p2 |
|
752 | 725 | break |
|
753 | 726 | p3 = util.normpath(os.path.join(p2, "map")) |
|
754 | 727 | if os.path.isfile(p3): |
|
755 | 728 | path = p3 |
|
756 | 729 | break |
|
757 | 730 | |
|
758 | 731 | cache, tmap, aliases = _readmapfile(path) |
|
759 | 732 | |
|
760 | 733 | for key, val in conf['templates'].items(): |
|
761 | 734 | if not val: |
|
762 | 735 | raise error.ParseError(_('missing value'), |
|
763 | 736 | conf.source('templates', key)) |
|
764 | 737 | if val[0] in "'\"": |
|
765 | 738 | if val[0] != val[-1]: |
|
766 | 739 | raise error.ParseError(_('unmatched quotes'), |
|
767 | 740 | conf.source('templates', key)) |
|
768 | 741 | cache[key] = unquotestring(val) |
|
769 | 742 | elif key != '__base__': |
|
770 | 743 | val = 'default', val |
|
771 | 744 | if ':' in val[1]: |
|
772 | 745 | val = val[1].split(':', 1) |
|
773 | 746 | tmap[key] = val[0], os.path.join(base, val[1]) |
|
774 | 747 | aliases.extend(conf['templatealias'].items()) |
|
775 | 748 | return cache, tmap, aliases |
|
776 | 749 | |
|
777 | 750 | class templater(object): |
|
778 | 751 | |
|
779 | 752 | def __init__(self, filters=None, defaults=None, resources=None, |
|
780 | 753 | cache=None, aliases=(), minchunk=1024, maxchunk=65536): |
|
781 | 754 | """Create template engine optionally with preloaded template fragments |
|
782 | 755 | |
|
783 | 756 | - ``filters``: a dict of functions to transform a value into another. |
|
784 | 757 | - ``defaults``: a dict of symbol values/functions; may be overridden |
|
785 | 758 | by a ``mapping`` dict. |
|
786 | 759 | - ``resources``: a resourcemapper object to look up internal data |
|
787 | 760 | (e.g. cache), inaccessible from user template. |
|
788 | 761 | - ``cache``: a dict of preloaded template fragments. |
|
789 | 762 | - ``aliases``: a list of alias (name, replacement) pairs. |
|
790 | 763 | |
|
791 | 764 | self.cache may be updated later to register additional template |
|
792 | 765 | fragments. |
|
793 | 766 | """ |
|
794 | 767 | if filters is None: |
|
795 | 768 | filters = {} |
|
796 | 769 | if defaults is None: |
|
797 | 770 | defaults = {} |
|
798 | 771 | if cache is None: |
|
799 | 772 | cache = {} |
|
800 | 773 | self.cache = cache.copy() |
|
801 | 774 | self.map = {} |
|
802 | 775 | self.filters = templatefilters.filters.copy() |
|
803 | 776 | self.filters.update(filters) |
|
804 | 777 | self.defaults = defaults |
|
805 | 778 | self._resources = resources |
|
806 | 779 | self._aliases = aliases |
|
807 | 780 | self.minchunk, self.maxchunk = minchunk, maxchunk |
|
808 | 781 | self.ecache = {} |
|
809 | 782 | |
|
810 | 783 | @classmethod |
|
811 | 784 | def frommapfile(cls, mapfile, filters=None, defaults=None, resources=None, |
|
812 | 785 | cache=None, minchunk=1024, maxchunk=65536): |
|
813 | 786 | """Create templater from the specified map file""" |
|
814 | 787 | t = cls(filters, defaults, resources, cache, [], minchunk, maxchunk) |
|
815 | 788 | cache, tmap, aliases = _readmapfile(mapfile) |
|
816 | 789 | t.cache.update(cache) |
|
817 | 790 | t.map = tmap |
|
818 | 791 | t._aliases = aliases |
|
819 | 792 | return t |
|
820 | 793 | |
|
821 | 794 | def __contains__(self, key): |
|
822 | 795 | return key in self.cache or key in self.map |
|
823 | 796 | |
|
824 | 797 | def load(self, t): |
|
825 | 798 | '''Get the template for the given template name. Use a local cache.''' |
|
826 | 799 | if t not in self.cache: |
|
827 | 800 | try: |
|
828 | 801 | self.cache[t] = util.readfile(self.map[t][1]) |
|
829 | 802 | except KeyError as inst: |
|
830 | 803 | raise templateutil.TemplateNotFound( |
|
831 | 804 | _('"%s" not in template map') % inst.args[0]) |
|
832 | 805 | except IOError as inst: |
|
833 | 806 | reason = (_('template file %s: %s') |
|
834 | 807 | % (self.map[t][1], |
|
835 | 808 | stringutil.forcebytestr(inst.args[1]))) |
|
836 | 809 | raise IOError(inst.args[0], encoding.strfromlocal(reason)) |
|
837 | 810 | return self.cache[t] |
|
838 | 811 | |
|
839 | 812 | def renderdefault(self, mapping): |
|
840 | 813 | """Render the default unnamed template and return result as string""" |
|
841 | 814 | return self.render('', mapping) |
|
842 | 815 | |
|
843 | 816 | def render(self, t, mapping): |
|
844 | 817 | """Render the specified named template and return result as string""" |
|
845 | 818 | return templateutil.stringify(self.generate(t, mapping)) |
|
846 | 819 | |
|
847 | 820 | def generate(self, t, mapping): |
|
848 | 821 | """Return a generator that renders the specified named template and |
|
849 | 822 | yields chunks""" |
|
850 | 823 | ttype = t in self.map and self.map[t][0] or 'default' |
|
851 | 824 | if ttype not in self.ecache: |
|
852 | 825 | try: |
|
853 | 826 | ecls = engines[ttype] |
|
854 | 827 | except KeyError: |
|
855 | 828 | raise error.Abort(_('invalid template engine: %s') % ttype) |
|
856 | 829 | self.ecache[ttype] = ecls(self.load, self.filters, self.defaults, |
|
857 | 830 | self._resources, self._aliases) |
|
858 | 831 | proc = self.ecache[ttype] |
|
859 | 832 | |
|
860 | 833 | stream = proc.process(t, mapping) |
|
861 | 834 | if self.minchunk: |
|
862 | 835 | stream = util.increasingchunks(stream, min=self.minchunk, |
|
863 | 836 | max=self.maxchunk) |
|
864 | 837 | return stream |
|
865 | 838 | |
|
866 | 839 | def templatepaths(): |
|
867 | 840 | '''return locations used for template files.''' |
|
868 | 841 | pathsrel = ['templates'] |
|
869 | 842 | paths = [os.path.normpath(os.path.join(util.datapath, f)) |
|
870 | 843 | for f in pathsrel] |
|
871 | 844 | return [p for p in paths if os.path.isdir(p)] |
|
872 | 845 | |
|
873 | 846 | def templatepath(name): |
|
874 | 847 | '''return location of template file. returns None if not found.''' |
|
875 | 848 | for p in templatepaths(): |
|
876 | 849 | f = os.path.join(p, name) |
|
877 | 850 | if os.path.exists(f): |
|
878 | 851 | return f |
|
879 | 852 | return None |
|
880 | 853 | |
|
881 | 854 | def stylemap(styles, paths=None): |
|
882 | 855 | """Return path to mapfile for a given style. |
|
883 | 856 | |
|
884 | 857 | Searches mapfile in the following locations: |
|
885 | 858 | 1. templatepath/style/map |
|
886 | 859 | 2. templatepath/map-style |
|
887 | 860 | 3. templatepath/map |
|
888 | 861 | """ |
|
889 | 862 | |
|
890 | 863 | if paths is None: |
|
891 | 864 | paths = templatepaths() |
|
892 | 865 | elif isinstance(paths, bytes): |
|
893 | 866 | paths = [paths] |
|
894 | 867 | |
|
895 | 868 | if isinstance(styles, bytes): |
|
896 | 869 | styles = [styles] |
|
897 | 870 | |
|
898 | 871 | for style in styles: |
|
899 | 872 | # only plain name is allowed to honor template paths |
|
900 | 873 | if (not style |
|
901 | 874 | or style in (pycompat.oscurdir, pycompat.ospardir) |
|
902 | 875 | or pycompat.ossep in style |
|
903 | 876 | or pycompat.osaltsep and pycompat.osaltsep in style): |
|
904 | 877 | continue |
|
905 | 878 | locations = [os.path.join(style, 'map'), 'map-' + style] |
|
906 | 879 | locations.append('map') |
|
907 | 880 | |
|
908 | 881 | for path in paths: |
|
909 | 882 | for location in locations: |
|
910 | 883 | mapfile = os.path.join(path, location) |
|
911 | 884 | if os.path.isfile(mapfile): |
|
912 | 885 | return style, mapfile |
|
913 | 886 | |
|
914 | 887 | raise RuntimeError("No hgweb templates found in %r" % paths) |
@@ -1,451 +1,478 b'' | |||
|
1 | 1 | # templateutil.py - utility for template evaluation |
|
2 | 2 | # |
|
3 | 3 | # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
|
4 | 4 | # |
|
5 | 5 | # This software may be used and distributed according to the terms of the |
|
6 | 6 | # GNU General Public License version 2 or any later version. |
|
7 | 7 | |
|
8 | 8 | from __future__ import absolute_import |
|
9 | 9 | |
|
10 | 10 | import types |
|
11 | 11 | |
|
12 | 12 | from .i18n import _ |
|
13 | 13 | from . import ( |
|
14 | 14 | error, |
|
15 | 15 | pycompat, |
|
16 | 16 | util, |
|
17 | 17 | ) |
|
18 | 18 | from .utils import ( |
|
19 | 19 | stringutil, |
|
20 | 20 | ) |
|
21 | 21 | |
|
22 | 22 | class ResourceUnavailable(error.Abort): |
|
23 | 23 | pass |
|
24 | 24 | |
|
25 | 25 | class TemplateNotFound(error.Abort): |
|
26 | 26 | pass |
|
27 | 27 | |
|
28 | 28 | class hybrid(object): |
|
29 | 29 | """Wrapper for list or dict to support legacy template |
|
30 | 30 | |
|
31 | 31 | This class allows us to handle both: |
|
32 | 32 | - "{files}" (legacy command-line-specific list hack) and |
|
33 | 33 | - "{files % '{file}\n'}" (hgweb-style with inlining and function support) |
|
34 | 34 | and to access raw values: |
|
35 | 35 | - "{ifcontains(file, files, ...)}", "{ifcontains(key, extras, ...)}" |
|
36 | 36 | - "{get(extras, key)}" |
|
37 | 37 | - "{files|json}" |
|
38 | 38 | """ |
|
39 | 39 | |
|
40 | 40 | def __init__(self, gen, values, makemap, joinfmt, keytype=None): |
|
41 | 41 | if gen is not None: |
|
42 | 42 | self.gen = gen # generator or function returning generator |
|
43 | 43 | self._values = values |
|
44 | 44 | self._makemap = makemap |
|
45 | 45 | self.joinfmt = joinfmt |
|
46 | 46 | self.keytype = keytype # hint for 'x in y' where type(x) is unresolved |
|
47 | 47 | def gen(self): |
|
48 | 48 | """Default generator to stringify this as {join(self, ' ')}""" |
|
49 | 49 | for i, x in enumerate(self._values): |
|
50 | 50 | if i > 0: |
|
51 | 51 | yield ' ' |
|
52 | 52 | yield self.joinfmt(x) |
|
53 | 53 | def itermaps(self): |
|
54 | 54 | makemap = self._makemap |
|
55 | 55 | for x in self._values: |
|
56 | 56 | yield makemap(x) |
|
57 | 57 | def __contains__(self, x): |
|
58 | 58 | return x in self._values |
|
59 | 59 | def __getitem__(self, key): |
|
60 | 60 | return self._values[key] |
|
61 | 61 | def __len__(self): |
|
62 | 62 | return len(self._values) |
|
63 | 63 | def __iter__(self): |
|
64 | 64 | return iter(self._values) |
|
65 | 65 | def __getattr__(self, name): |
|
66 | 66 | if name not in (r'get', r'items', r'iteritems', r'iterkeys', |
|
67 | 67 | r'itervalues', r'keys', r'values'): |
|
68 | 68 | raise AttributeError(name) |
|
69 | 69 | return getattr(self._values, name) |
|
70 | 70 | |
|
71 | 71 | class mappable(object): |
|
72 | 72 | """Wrapper for non-list/dict object to support map operation |
|
73 | 73 | |
|
74 | 74 | This class allows us to handle both: |
|
75 | 75 | - "{manifest}" |
|
76 | 76 | - "{manifest % '{rev}:{node}'}" |
|
77 | 77 | - "{manifest.rev}" |
|
78 | 78 | |
|
79 | 79 | Unlike a hybrid, this does not simulate the behavior of the underling |
|
80 | 80 | value. Use unwrapvalue() or unwraphybrid() to obtain the inner object. |
|
81 | 81 | """ |
|
82 | 82 | |
|
83 | 83 | def __init__(self, gen, key, value, makemap): |
|
84 | 84 | if gen is not None: |
|
85 | 85 | self.gen = gen # generator or function returning generator |
|
86 | 86 | self._key = key |
|
87 | 87 | self._value = value # may be generator of strings |
|
88 | 88 | self._makemap = makemap |
|
89 | 89 | |
|
90 | 90 | def gen(self): |
|
91 | 91 | yield pycompat.bytestr(self._value) |
|
92 | 92 | |
|
93 | 93 | def tomap(self): |
|
94 | 94 | return self._makemap(self._key) |
|
95 | 95 | |
|
96 | 96 | def itermaps(self): |
|
97 | 97 | yield self.tomap() |
|
98 | 98 | |
|
99 | 99 | def hybriddict(data, key='key', value='value', fmt=None, gen=None): |
|
100 | 100 | """Wrap data to support both dict-like and string-like operations""" |
|
101 | 101 | prefmt = pycompat.identity |
|
102 | 102 | if fmt is None: |
|
103 | 103 | fmt = '%s=%s' |
|
104 | 104 | prefmt = pycompat.bytestr |
|
105 | 105 | return hybrid(gen, data, lambda k: {key: k, value: data[k]}, |
|
106 | 106 | lambda k: fmt % (prefmt(k), prefmt(data[k]))) |
|
107 | 107 | |
|
108 | 108 | def hybridlist(data, name, fmt=None, gen=None): |
|
109 | 109 | """Wrap data to support both list-like and string-like operations""" |
|
110 | 110 | prefmt = pycompat.identity |
|
111 | 111 | if fmt is None: |
|
112 | 112 | fmt = '%s' |
|
113 | 113 | prefmt = pycompat.bytestr |
|
114 | 114 | return hybrid(gen, data, lambda x: {name: x}, lambda x: fmt % prefmt(x)) |
|
115 | 115 | |
|
116 | 116 | def unwraphybrid(thing): |
|
117 | 117 | """Return an object which can be stringified possibly by using a legacy |
|
118 | 118 | template""" |
|
119 | 119 | gen = getattr(thing, 'gen', None) |
|
120 | 120 | if gen is None: |
|
121 | 121 | return thing |
|
122 | 122 | if callable(gen): |
|
123 | 123 | return gen() |
|
124 | 124 | return gen |
|
125 | 125 | |
|
126 | 126 | def unwrapvalue(thing): |
|
127 | 127 | """Move the inner value object out of the wrapper""" |
|
128 | 128 | if not util.safehasattr(thing, '_value'): |
|
129 | 129 | return thing |
|
130 | 130 | return thing._value |
|
131 | 131 | |
|
132 | 132 | def wraphybridvalue(container, key, value): |
|
133 | 133 | """Wrap an element of hybrid container to be mappable |
|
134 | 134 | |
|
135 | 135 | The key is passed to the makemap function of the given container, which |
|
136 | 136 | should be an item generated by iter(container). |
|
137 | 137 | """ |
|
138 | 138 | makemap = getattr(container, '_makemap', None) |
|
139 | 139 | if makemap is None: |
|
140 | 140 | return value |
|
141 | 141 | if util.safehasattr(value, '_makemap'): |
|
142 | 142 | # a nested hybrid list/dict, which has its own way of map operation |
|
143 | 143 | return value |
|
144 | 144 | return mappable(None, key, value, makemap) |
|
145 | 145 | |
|
146 | 146 | def compatdict(context, mapping, name, data, key='key', value='value', |
|
147 | 147 | fmt=None, plural=None, separator=' '): |
|
148 | 148 | """Wrap data like hybriddict(), but also supports old-style list template |
|
149 | 149 | |
|
150 | 150 | This exists for backward compatibility with the old-style template. Use |
|
151 | 151 | hybriddict() for new template keywords. |
|
152 | 152 | """ |
|
153 | 153 | c = [{key: k, value: v} for k, v in data.iteritems()] |
|
154 | 154 | f = _showcompatlist(context, mapping, name, c, plural, separator) |
|
155 | 155 | return hybriddict(data, key=key, value=value, fmt=fmt, gen=f) |
|
156 | 156 | |
|
157 | 157 | def compatlist(context, mapping, name, data, element=None, fmt=None, |
|
158 | 158 | plural=None, separator=' '): |
|
159 | 159 | """Wrap data like hybridlist(), but also supports old-style list template |
|
160 | 160 | |
|
161 | 161 | This exists for backward compatibility with the old-style template. Use |
|
162 | 162 | hybridlist() for new template keywords. |
|
163 | 163 | """ |
|
164 | 164 | f = _showcompatlist(context, mapping, name, data, plural, separator) |
|
165 | 165 | return hybridlist(data, name=element or name, fmt=fmt, gen=f) |
|
166 | 166 | |
|
167 | 167 | def _showcompatlist(context, mapping, name, values, plural=None, separator=' '): |
|
168 | 168 | """Return a generator that renders old-style list template |
|
169 | 169 | |
|
170 | 170 | name is name of key in template map. |
|
171 | 171 | values is list of strings or dicts. |
|
172 | 172 | plural is plural of name, if not simply name + 's'. |
|
173 | 173 | separator is used to join values as a string |
|
174 | 174 | |
|
175 | 175 | expansion works like this, given name 'foo'. |
|
176 | 176 | |
|
177 | 177 | if values is empty, expand 'no_foos'. |
|
178 | 178 | |
|
179 | 179 | if 'foo' not in template map, return values as a string, |
|
180 | 180 | joined by 'separator'. |
|
181 | 181 | |
|
182 | 182 | expand 'start_foos'. |
|
183 | 183 | |
|
184 | 184 | for each value, expand 'foo'. if 'last_foo' in template |
|
185 | 185 | map, expand it instead of 'foo' for last key. |
|
186 | 186 | |
|
187 | 187 | expand 'end_foos'. |
|
188 | 188 | """ |
|
189 | 189 | if not plural: |
|
190 | 190 | plural = name + 's' |
|
191 | 191 | if not values: |
|
192 | 192 | noname = 'no_' + plural |
|
193 | 193 | if context.preload(noname): |
|
194 | 194 | yield context.process(noname, mapping) |
|
195 | 195 | return |
|
196 | 196 | if not context.preload(name): |
|
197 | 197 | if isinstance(values[0], bytes): |
|
198 | 198 | yield separator.join(values) |
|
199 | 199 | else: |
|
200 | 200 | for v in values: |
|
201 | 201 | r = dict(v) |
|
202 | 202 | r.update(mapping) |
|
203 | 203 | yield r |
|
204 | 204 | return |
|
205 | 205 | startname = 'start_' + plural |
|
206 | 206 | if context.preload(startname): |
|
207 | 207 | yield context.process(startname, mapping) |
|
208 | 208 | def one(v, tag=name): |
|
209 | 209 | vmapping = {} |
|
210 | 210 | try: |
|
211 | 211 | vmapping.update(v) |
|
212 | 212 | # Python 2 raises ValueError if the type of v is wrong. Python |
|
213 | 213 | # 3 raises TypeError. |
|
214 | 214 | except (AttributeError, TypeError, ValueError): |
|
215 | 215 | try: |
|
216 | 216 | # Python 2 raises ValueError trying to destructure an e.g. |
|
217 | 217 | # bytes. Python 3 raises TypeError. |
|
218 | 218 | for a, b in v: |
|
219 | 219 | vmapping[a] = b |
|
220 | 220 | except (TypeError, ValueError): |
|
221 | 221 | vmapping[name] = v |
|
222 | 222 | vmapping = context.overlaymap(mapping, vmapping) |
|
223 | 223 | return context.process(tag, vmapping) |
|
224 | 224 | lastname = 'last_' + name |
|
225 | 225 | if context.preload(lastname): |
|
226 | 226 | last = values.pop() |
|
227 | 227 | else: |
|
228 | 228 | last = None |
|
229 | 229 | for v in values: |
|
230 | 230 | yield one(v) |
|
231 | 231 | if last is not None: |
|
232 | 232 | yield one(last, tag=lastname) |
|
233 | 233 | endname = 'end_' + plural |
|
234 | 234 | if context.preload(endname): |
|
235 | 235 | yield context.process(endname, mapping) |
|
236 | 236 | |
|
237 | def flatten(thing): | |
|
238 | """Yield a single stream from a possibly nested set of iterators""" | |
|
239 | thing = unwraphybrid(thing) | |
|
240 | if isinstance(thing, bytes): | |
|
241 | yield thing | |
|
242 | elif isinstance(thing, str): | |
|
243 | # We can only hit this on Python 3, and it's here to guard | |
|
244 | # against infinite recursion. | |
|
245 | raise error.ProgrammingError('Mercurial IO including templates is done' | |
|
246 | ' with bytes, not strings, got %r' % thing) | |
|
247 | elif thing is None: | |
|
248 | pass | |
|
249 | elif not util.safehasattr(thing, '__iter__'): | |
|
250 | yield pycompat.bytestr(thing) | |
|
251 | else: | |
|
252 | for i in thing: | |
|
253 | i = unwraphybrid(i) | |
|
254 | if isinstance(i, bytes): | |
|
255 | yield i | |
|
256 | elif i is None: | |
|
257 | pass | |
|
258 | elif not util.safehasattr(i, '__iter__'): | |
|
259 | yield pycompat.bytestr(i) | |
|
260 | else: | |
|
261 | for j in flatten(i): | |
|
262 | yield j | |
|
263 | ||
|
237 | 264 | def stringify(thing): |
|
238 | 265 | """Turn values into bytes by converting into text and concatenating them""" |
|
239 | 266 | thing = unwraphybrid(thing) |
|
240 | 267 | if util.safehasattr(thing, '__iter__') and not isinstance(thing, bytes): |
|
241 | 268 | if isinstance(thing, str): |
|
242 | 269 | # This is only reachable on Python 3 (otherwise |
|
243 | 270 | # isinstance(thing, bytes) would have been true), and is |
|
244 | 271 | # here to prevent infinite recursion bugs on Python 3. |
|
245 | 272 | raise error.ProgrammingError( |
|
246 | 273 | 'stringify got unexpected unicode string: %r' % thing) |
|
247 | 274 | return "".join([stringify(t) for t in thing if t is not None]) |
|
248 | 275 | if thing is None: |
|
249 | 276 | return "" |
|
250 | 277 | return pycompat.bytestr(thing) |
|
251 | 278 | |
|
252 | 279 | def findsymbolicname(arg): |
|
253 | 280 | """Find symbolic name for the given compiled expression; returns None |
|
254 | 281 | if nothing found reliably""" |
|
255 | 282 | while True: |
|
256 | 283 | func, data = arg |
|
257 | 284 | if func is runsymbol: |
|
258 | 285 | return data |
|
259 | 286 | elif func is runfilter: |
|
260 | 287 | arg = data[0] |
|
261 | 288 | else: |
|
262 | 289 | return None |
|
263 | 290 | |
|
264 | 291 | def evalrawexp(context, mapping, arg): |
|
265 | 292 | """Evaluate given argument as a bare template object which may require |
|
266 | 293 | further processing (such as folding generator of strings)""" |
|
267 | 294 | func, data = arg |
|
268 | 295 | return func(context, mapping, data) |
|
269 | 296 | |
|
270 | 297 | def evalfuncarg(context, mapping, arg): |
|
271 | 298 | """Evaluate given argument as value type""" |
|
272 | 299 | thing = evalrawexp(context, mapping, arg) |
|
273 | 300 | thing = unwrapvalue(thing) |
|
274 | 301 | # evalrawexp() may return string, generator of strings or arbitrary object |
|
275 | 302 | # such as date tuple, but filter does not want generator. |
|
276 | 303 | if isinstance(thing, types.GeneratorType): |
|
277 | 304 | thing = stringify(thing) |
|
278 | 305 | return thing |
|
279 | 306 | |
|
280 | 307 | def evalboolean(context, mapping, arg): |
|
281 | 308 | """Evaluate given argument as boolean, but also takes boolean literals""" |
|
282 | 309 | func, data = arg |
|
283 | 310 | if func is runsymbol: |
|
284 | 311 | thing = func(context, mapping, data, default=None) |
|
285 | 312 | if thing is None: |
|
286 | 313 | # not a template keyword, takes as a boolean literal |
|
287 | 314 | thing = stringutil.parsebool(data) |
|
288 | 315 | else: |
|
289 | 316 | thing = func(context, mapping, data) |
|
290 | 317 | thing = unwrapvalue(thing) |
|
291 | 318 | if isinstance(thing, bool): |
|
292 | 319 | return thing |
|
293 | 320 | # other objects are evaluated as strings, which means 0 is True, but |
|
294 | 321 | # empty dict/list should be False as they are expected to be '' |
|
295 | 322 | return bool(stringify(thing)) |
|
296 | 323 | |
|
297 | 324 | def evalinteger(context, mapping, arg, err=None): |
|
298 | 325 | v = evalfuncarg(context, mapping, arg) |
|
299 | 326 | try: |
|
300 | 327 | return int(v) |
|
301 | 328 | except (TypeError, ValueError): |
|
302 | 329 | raise error.ParseError(err or _('not an integer')) |
|
303 | 330 | |
|
304 | 331 | def evalstring(context, mapping, arg): |
|
305 | 332 | return stringify(evalrawexp(context, mapping, arg)) |
|
306 | 333 | |
|
307 | 334 | def evalstringliteral(context, mapping, arg): |
|
308 | 335 | """Evaluate given argument as string template, but returns symbol name |
|
309 | 336 | if it is unknown""" |
|
310 | 337 | func, data = arg |
|
311 | 338 | if func is runsymbol: |
|
312 | 339 | thing = func(context, mapping, data, default=data) |
|
313 | 340 | else: |
|
314 | 341 | thing = func(context, mapping, data) |
|
315 | 342 | return stringify(thing) |
|
316 | 343 | |
|
317 | 344 | _evalfuncbytype = { |
|
318 | 345 | bool: evalboolean, |
|
319 | 346 | bytes: evalstring, |
|
320 | 347 | int: evalinteger, |
|
321 | 348 | } |
|
322 | 349 | |
|
323 | 350 | def evalastype(context, mapping, arg, typ): |
|
324 | 351 | """Evaluate given argument and coerce its type""" |
|
325 | 352 | try: |
|
326 | 353 | f = _evalfuncbytype[typ] |
|
327 | 354 | except KeyError: |
|
328 | 355 | raise error.ProgrammingError('invalid type specified: %r' % typ) |
|
329 | 356 | return f(context, mapping, arg) |
|
330 | 357 | |
|
331 | 358 | def runinteger(context, mapping, data): |
|
332 | 359 | return int(data) |
|
333 | 360 | |
|
334 | 361 | def runstring(context, mapping, data): |
|
335 | 362 | return data |
|
336 | 363 | |
|
337 | 364 | def _recursivesymbolblocker(key): |
|
338 | 365 | def showrecursion(**args): |
|
339 | 366 | raise error.Abort(_("recursive reference '%s' in template") % key) |
|
340 | 367 | return showrecursion |
|
341 | 368 | |
|
342 | 369 | def runsymbol(context, mapping, key, default=''): |
|
343 | 370 | v = context.symbol(mapping, key) |
|
344 | 371 | if v is None: |
|
345 | 372 | # put poison to cut recursion. we can't move this to parsing phase |
|
346 | 373 | # because "x = {x}" is allowed if "x" is a keyword. (issue4758) |
|
347 | 374 | safemapping = mapping.copy() |
|
348 | 375 | safemapping[key] = _recursivesymbolblocker(key) |
|
349 | 376 | try: |
|
350 | 377 | v = context.process(key, safemapping) |
|
351 | 378 | except TemplateNotFound: |
|
352 | 379 | v = default |
|
353 | 380 | if callable(v) and getattr(v, '_requires', None) is None: |
|
354 | 381 | # old templatekw: expand all keywords and resources |
|
355 | 382 | # (TODO: deprecate this after porting web template keywords to new API) |
|
356 | 383 | props = {k: context._resources.lookup(context, mapping, k) |
|
357 | 384 | for k in context._resources.knownkeys()} |
|
358 | 385 | # pass context to _showcompatlist() through templatekw._showlist() |
|
359 | 386 | props['templ'] = context |
|
360 | 387 | props.update(mapping) |
|
361 | 388 | return v(**pycompat.strkwargs(props)) |
|
362 | 389 | if callable(v): |
|
363 | 390 | # new templatekw |
|
364 | 391 | try: |
|
365 | 392 | return v(context, mapping) |
|
366 | 393 | except ResourceUnavailable: |
|
367 | 394 | # unsupported keyword is mapped to empty just like unknown keyword |
|
368 | 395 | return None |
|
369 | 396 | return v |
|
370 | 397 | |
|
371 | 398 | def runtemplate(context, mapping, template): |
|
372 | 399 | for arg in template: |
|
373 | 400 | yield evalrawexp(context, mapping, arg) |
|
374 | 401 | |
|
375 | 402 | def runfilter(context, mapping, data): |
|
376 | 403 | arg, filt = data |
|
377 | 404 | thing = evalfuncarg(context, mapping, arg) |
|
378 | 405 | try: |
|
379 | 406 | return filt(thing) |
|
380 | 407 | except (ValueError, AttributeError, TypeError): |
|
381 | 408 | sym = findsymbolicname(arg) |
|
382 | 409 | if sym: |
|
383 | 410 | msg = (_("template filter '%s' is not compatible with keyword '%s'") |
|
384 | 411 | % (pycompat.sysbytes(filt.__name__), sym)) |
|
385 | 412 | else: |
|
386 | 413 | msg = (_("incompatible use of template filter '%s'") |
|
387 | 414 | % pycompat.sysbytes(filt.__name__)) |
|
388 | 415 | raise error.Abort(msg) |
|
389 | 416 | |
|
390 | 417 | def runmap(context, mapping, data): |
|
391 | 418 | darg, targ = data |
|
392 | 419 | d = evalrawexp(context, mapping, darg) |
|
393 | 420 | if util.safehasattr(d, 'itermaps'): |
|
394 | 421 | diter = d.itermaps() |
|
395 | 422 | else: |
|
396 | 423 | try: |
|
397 | 424 | diter = iter(d) |
|
398 | 425 | except TypeError: |
|
399 | 426 | sym = findsymbolicname(darg) |
|
400 | 427 | if sym: |
|
401 | 428 | raise error.ParseError(_("keyword '%s' is not iterable") % sym) |
|
402 | 429 | else: |
|
403 | 430 | raise error.ParseError(_("%r is not iterable") % d) |
|
404 | 431 | |
|
405 | 432 | for i, v in enumerate(diter): |
|
406 | 433 | if isinstance(v, dict): |
|
407 | 434 | lm = context.overlaymap(mapping, v) |
|
408 | 435 | lm['index'] = i |
|
409 | 436 | yield evalrawexp(context, lm, targ) |
|
410 | 437 | else: |
|
411 | 438 | # v is not an iterable of dicts, this happen when 'key' |
|
412 | 439 | # has been fully expanded already and format is useless. |
|
413 | 440 | # If so, return the expanded value. |
|
414 | 441 | yield v |
|
415 | 442 | |
|
416 | 443 | def runmember(context, mapping, data): |
|
417 | 444 | darg, memb = data |
|
418 | 445 | d = evalrawexp(context, mapping, darg) |
|
419 | 446 | if util.safehasattr(d, 'tomap'): |
|
420 | 447 | lm = context.overlaymap(mapping, d.tomap()) |
|
421 | 448 | return runsymbol(context, lm, memb) |
|
422 | 449 | if util.safehasattr(d, 'get'): |
|
423 | 450 | return getdictitem(d, memb) |
|
424 | 451 | |
|
425 | 452 | sym = findsymbolicname(darg) |
|
426 | 453 | if sym: |
|
427 | 454 | raise error.ParseError(_("keyword '%s' has no member") % sym) |
|
428 | 455 | else: |
|
429 | 456 | raise error.ParseError(_("%r has no member") % pycompat.bytestr(d)) |
|
430 | 457 | |
|
431 | 458 | def runnegate(context, mapping, data): |
|
432 | 459 | data = evalinteger(context, mapping, data, |
|
433 | 460 | _('negation needs an integer argument')) |
|
434 | 461 | return -data |
|
435 | 462 | |
|
436 | 463 | def runarithmetic(context, mapping, data): |
|
437 | 464 | func, left, right = data |
|
438 | 465 | left = evalinteger(context, mapping, left, |
|
439 | 466 | _('arithmetic only defined on integers')) |
|
440 | 467 | right = evalinteger(context, mapping, right, |
|
441 | 468 | _('arithmetic only defined on integers')) |
|
442 | 469 | try: |
|
443 | 470 | return func(left, right) |
|
444 | 471 | except ZeroDivisionError: |
|
445 | 472 | raise error.Abort(_('division by zero is not defined')) |
|
446 | 473 | |
|
447 | 474 | def getdictitem(dictarg, key): |
|
448 | 475 | val = dictarg.get(key) |
|
449 | 476 | if val is None: |
|
450 | 477 | return |
|
451 | 478 | return wraphybridvalue(dictarg, key, val) |
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