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1 | 1 | # This software may be used and distributed according to the terms of the |
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2 | 2 | # GNU General Public License version 2 or any later version. |
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3 | 3 | |
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4 | 4 | # based on bundleheads extension by Gregory Szorc <gps@mozilla.com> |
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5 | 5 | |
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6 | 6 | from __future__ import absolute_import |
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7 | 7 | |
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8 | 8 | import abc |
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9 | 9 | import os |
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10 | 10 | import subprocess |
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11 | 11 | import tempfile |
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12 | 12 | |
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13 | 13 | from mercurial.pycompat import open |
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14 | 14 | from mercurial import ( |
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15 | 15 | node, |
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16 | 16 | pycompat, |
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17 | 17 | ) |
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18 | 18 | from mercurial.utils import ( |
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19 | 19 | hashutil, |
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20 | 20 | procutil, |
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21 | 21 | ) |
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22 | 22 | |
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23 | 23 | |
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24 | 24 | class BundleWriteException(Exception): |
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25 | 25 | pass |
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26 | 26 | |
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27 | 27 | |
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28 | 28 | class BundleReadException(Exception): |
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29 | 29 | pass |
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30 | 30 | |
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31 | 31 | |
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32 | 32 | class abstractbundlestore(object): # pytype: disable=ignored-metaclass |
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33 | 33 | """Defines the interface for bundle stores. |
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34 | 34 | |
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35 | 35 | A bundle store is an entity that stores raw bundle data. It is a simple |
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36 | 36 | key-value store. However, the keys are chosen by the store. The keys can |
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37 | 37 | be any Python object understood by the corresponding bundle index (see |
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38 | 38 | ``abstractbundleindex`` below). |
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39 | 39 | """ |
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40 | 40 | |
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41 | 41 | __metaclass__ = abc.ABCMeta |
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42 | 42 | |
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43 | 43 | @abc.abstractmethod |
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44 | 44 | def write(self, data): |
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45 | 45 | """Write bundle data to the store. |
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46 | 46 | |
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47 | 47 | This function receives the raw data to be written as a str. |
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48 | 48 | Throws BundleWriteException |
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49 | 49 | The key of the written data MUST be returned. |
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50 | 50 | """ |
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51 | 51 | |
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52 | 52 | @abc.abstractmethod |
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53 | 53 | def read(self, key): |
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54 | 54 | """Obtain bundle data for a key. |
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55 | 55 | |
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56 | 56 | Returns None if the bundle isn't known. |
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57 | 57 | Throws BundleReadException |
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58 | 58 | The returned object should be a file object supporting read() |
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59 | 59 | and close(). |
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60 | 60 | """ |
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61 | 61 | |
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62 | 62 | |
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63 | 63 | class filebundlestore(object): |
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64 | 64 | """bundle store in filesystem |
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65 | 65 | |
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66 | 66 | meant for storing bundles somewhere on disk and on network filesystems |
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67 | 67 | """ |
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68 | 68 | |
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69 | 69 | def __init__(self, ui, repo): |
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70 | 70 | self.ui = ui |
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71 | 71 | self.repo = repo |
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72 | 72 | self.storepath = ui.configpath(b'scratchbranch', b'storepath') |
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73 | 73 | if not self.storepath: |
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74 | 74 | self.storepath = self.repo.vfs.join( |
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75 | 75 | b"scratchbranches", b"filebundlestore" |
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76 | 76 | ) |
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77 | 77 | if not os.path.exists(self.storepath): |
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78 | 78 | os.makedirs(self.storepath) |
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79 | 79 | |
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80 | 80 | def _dirpath(self, hashvalue): |
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81 | 81 | """First two bytes of the hash are the name of the upper |
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82 | 82 | level directory, next two bytes are the name of the |
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83 | 83 | next level directory""" |
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84 | 84 | return os.path.join(self.storepath, hashvalue[0:2], hashvalue[2:4]) |
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85 | 85 | |
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86 | 86 | def _filepath(self, filename): |
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87 | 87 | return os.path.join(self._dirpath(filename), filename) |
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88 | 88 | |
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89 | 89 | def write(self, data): |
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90 | 90 | filename = node.hex(hashutil.sha1(data).digest()) |
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91 | 91 | dirpath = self._dirpath(filename) |
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92 | 92 | |
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93 | 93 | if not os.path.exists(dirpath): |
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94 | 94 | os.makedirs(dirpath) |
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95 | 95 | |
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96 | 96 | with open(self._filepath(filename), b'wb') as f: |
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97 | 97 | f.write(data) |
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98 | 98 | |
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99 | 99 | return filename |
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100 | 100 | |
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101 | 101 | def read(self, key): |
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102 | 102 | try: |
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103 | 103 | with open(self._filepath(key), b'rb') as f: |
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104 | 104 | return f.read() |
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105 | 105 | except IOError: |
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106 | 106 | return None |
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107 | 107 | |
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108 | 108 | |
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109 | def format_placeholders_args(args, filename=None, handle=None): | |
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110 | """Formats `args` with Infinitepush replacements. | |
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111 | ||
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112 | Hack to get `str.format()`-ed strings working in a BC way with | |
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113 | bytes. | |
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114 | """ | |
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115 | formatted_args = [] | |
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116 | for arg in args: | |
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117 | if filename and arg == b'{filename}': | |
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118 | formatted_args.append(filename) | |
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119 | elif handle and arg == b'{handle}': | |
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120 | formatted_args.append(handle) | |
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121 | else: | |
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122 | formatted_args.append(arg) | |
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123 | return formatted_args | |
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124 | ||
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125 | ||
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109 | 126 | class externalbundlestore(abstractbundlestore): |
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110 | 127 | def __init__(self, put_binary, put_args, get_binary, get_args): |
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111 | 128 | """ |
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112 | 129 | `put_binary` - path to binary file which uploads bundle to external |
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113 | 130 | storage and prints key to stdout |
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114 | 131 | `put_args` - format string with additional args to `put_binary` |
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115 | 132 | {filename} replacement field can be used. |
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116 | 133 | `get_binary` - path to binary file which accepts filename and key |
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117 | 134 | (in that order), downloads bundle from store and saves it to file |
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118 | 135 | `get_args` - format string with additional args to `get_binary`. |
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119 | 136 | {filename} and {handle} replacement field can be used. |
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120 | 137 | """ |
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121 | 138 | |
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122 | 139 | self.put_args = put_args |
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123 | 140 | self.get_args = get_args |
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124 | 141 | self.put_binary = put_binary |
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125 | 142 | self.get_binary = get_binary |
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126 | 143 | |
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127 | 144 | def _call_binary(self, args): |
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128 | 145 | p = subprocess.Popen( |
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129 | 146 | pycompat.rapply(procutil.tonativestr, args), |
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130 | 147 | stdout=subprocess.PIPE, |
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131 | 148 | stderr=subprocess.PIPE, |
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132 | 149 | close_fds=True, |
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133 | 150 | ) |
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134 | 151 | stdout, stderr = p.communicate() |
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135 | 152 | returncode = p.returncode |
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136 | 153 | return returncode, stdout, stderr |
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137 | 154 | |
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138 | 155 | def write(self, data): |
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139 | 156 | # Won't work on windows because you can't open file second time without |
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140 | 157 | # closing it |
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141 | 158 | # TODO: rewrite without str.format() and replace NamedTemporaryFile() |
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142 | 159 | # with pycompat.namedtempfile() |
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143 | 160 | with pycompat.namedtempfile() as temp: |
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144 | 161 | temp.write(data) |
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145 | 162 | temp.flush() |
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146 | 163 | temp.seek(0) |
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147 |
formatted_args = |
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148 |
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149 |
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164 | formatted_args = format_placeholders_args( | |
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165 | self.put_args, filename=temp.name | |
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166 | ) | |
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150 | 167 | returncode, stdout, stderr = self._call_binary( |
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151 | 168 | [self.put_binary] + formatted_args |
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152 | 169 | ) |
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153 | 170 | |
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154 | 171 | if returncode != 0: |
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155 | 172 | raise BundleWriteException( |
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156 | 173 | b'Failed to upload to external store: %s' % stderr |
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157 | 174 | ) |
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158 | 175 | stdout_lines = stdout.splitlines() |
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159 | 176 | if len(stdout_lines) == 1: |
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160 | 177 | return stdout_lines[0] |
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161 | 178 | else: |
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162 | 179 | raise BundleWriteException( |
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163 | 180 | b'Bad output from %s: %s' % (self.put_binary, stdout) |
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164 | 181 | ) |
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165 | 182 | |
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166 | 183 | def read(self, handle): |
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167 | 184 | # Won't work on windows because you can't open file second time without |
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168 | 185 | # closing it |
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169 | # TODO: rewrite without str.format() | |
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170 | 186 | with pycompat.namedtempfile() as temp: |
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171 |
formatted_args = |
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172 |
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173 | for arg in self.get_args | |
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174 | ] | |
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187 | formatted_args = format_placeholders_args( | |
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188 | self.get_args, filename=temp.name, handle=handle | |
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189 | ) | |
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175 | 190 | returncode, stdout, stderr = self._call_binary( |
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176 | 191 | [self.get_binary] + formatted_args |
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177 | 192 | ) |
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178 | 193 | |
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179 | 194 | if returncode != 0: |
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180 | 195 | raise BundleReadException( |
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181 | 196 | b'Failed to download from external store: %s' % stderr |
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182 | 197 | ) |
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183 | 198 | return temp.read() |
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