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1 | 1 | """Shell mode for IPython. |
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2 | 2 | |
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3 | 3 | Start ipython in shell mode by invoking "ipython -p sh" |
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4 | 4 | |
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5 | 5 | (the old version, "ipython -p pysh" still works but this is the more "modern" |
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6 | 6 | shell mode and is recommended for users who don't care about pysh-mode |
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7 | 7 | compatibility) |
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8 | 8 | """ |
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9 | 9 | |
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10 | 10 | from IPython import ipapi |
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11 | 11 | import os,textwrap |
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12 | 12 | |
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13 | 13 | # The import below effectively obsoletes your old-style ipythonrc[.ini], |
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14 | 14 | # so consider yourself warned! |
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15 | 15 | |
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16 | 16 | import ipy_defaults |
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17 | 17 | |
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18 | 18 | def main(): |
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19 | 19 | ip = ipapi.get() |
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20 | 20 | o = ip.options |
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21 | 21 | # autocall to "full" mode (smart mode is default, I like full mode) |
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22 | 22 | |
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23 | 23 | o.autocall = 2 |
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24 | 24 | |
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25 | 25 | # Jason Orendorff's path class is handy to have in user namespace |
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26 | 26 | # if you are doing shell-like stuff |
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27 | 27 | try: |
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28 | 28 | ip.ex("from IPython.external.path import path" ) |
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29 | 29 | except ImportError: |
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30 | 30 | pass |
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31 | 31 | |
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32 | 32 | # beefed up %env is handy in shell mode |
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33 | 33 | import envpersist |
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34 | 34 | |
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35 | 35 | # To see where mycmd resides (in path/aliases), do %which mycmd |
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36 | 36 | import ipy_which |
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37 | 37 | |
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38 | 38 | # tab completers for hg, svn, ... |
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39 | 39 | import ipy_app_completers |
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40 | 40 | |
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41 | 41 | # To make executables foo and bar in mybin usable without PATH change, do: |
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42 | 42 | # %rehashdir c:/mybin |
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43 | 43 | # %store foo |
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44 | 44 | # %store bar |
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45 | 45 | import ipy_rehashdir |
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46 | 46 | |
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47 | 47 | # does not work without subprocess module! |
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48 | 48 | #import ipy_signals |
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49 | 49 | |
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50 | 50 | ip.ex('import os') |
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51 | 51 | ip.ex("def up(): os.chdir('..')") |
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52 | 52 | ip.user_ns['LA'] = LastArgFinder() |
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53 | 53 | # Nice prompt |
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54 | 54 | |
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55 | 55 | o.prompt_in1= r'\C_LightBlue[\C_LightCyan\Y2\C_LightBlue]\C_Green|\#> ' |
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56 | 56 | o.prompt_in2= r'\C_Green|\C_LightGreen\D\C_Green> ' |
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57 | 57 | o.prompt_out= '<\#> ' |
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58 | 58 | |
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59 | 59 | from IPython import Release |
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60 | 60 | |
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61 | 61 | import sys |
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62 | 62 | # Non-chatty banner |
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63 | 63 | o.banner = "IPython %s [on Py %s]\n" % (Release.version,sys.version.split(None,1)[0]) |
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64 | 64 | |
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65 | 65 | |
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66 | 66 | ip.IP.default_option('cd','-q') |
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67 | 67 | ip.IP.default_option('macro', '-r') |
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68 | 68 | # If you only rarely want to execute the things you %edit... |
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69 | 69 | #ip.IP.default_option('edit','-x') |
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70 | 70 | |
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71 | 71 | |
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72 | 72 | o.prompts_pad_left="1" |
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73 | 73 | # Remove all blank lines in between prompts, like a normal shell. |
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74 | 74 | o.separate_in="0" |
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75 | 75 | o.separate_out="0" |
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76 | 76 | o.separate_out2="0" |
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77 | 77 | |
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78 | 78 | # now alias all syscommands |
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79 | 79 | |
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80 | 80 | db = ip.db |
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81 | 81 | |
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82 | 82 | syscmds = db.get("syscmdlist",[] ) |
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83 | 83 | if not syscmds: |
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84 | 84 | print textwrap.dedent(""" |
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85 | 85 | System command list not initialized, probably the first run... |
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86 | 86 | running %rehashx to refresh the command list. Run %rehashx |
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87 | 87 | again to refresh command list (after installing new software etc.) |
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88 | 88 | """) |
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89 | 89 | ip.magic('rehashx') |
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90 | 90 | syscmds = db.get("syscmdlist") |
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91 | 91 | |
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92 | 92 | # lowcase aliases on win32 only |
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93 | 93 | if os.name == 'posix': |
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94 | 94 | mapper = lambda s:s |
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95 | 95 | else: |
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96 | 96 | def mapper(s): return s.lower() |
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97 | 97 | |
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98 | 98 | for cmd in syscmds: |
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99 | 99 | # print "sys",cmd #dbg |
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100 | 100 | noext, ext = os.path.splitext(cmd) |
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101 | 101 | key = mapper(noext) |
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102 | 102 | if key not in ip.IP.alias_table: |
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103 | ip.defalias(key, cmd) | |
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103 | ip.defalias(key.replace('.',''), cmd) | |
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104 | 104 | |
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105 | 105 | # mglob combines 'find', recursion, exclusion... '%mglob?' to learn more |
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106 | 106 | ip.load("IPython.external.mglob") |
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107 | 107 | |
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108 | 108 | # win32 is crippled w/o cygwin, try to help it a little bit |
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109 | 109 | if sys.platform == 'win32': |
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110 | 110 | if 'cygwin' in os.environ['PATH'].lower(): |
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111 | 111 | # use the colors of cygwin ls (recommended) |
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112 | 112 | ip.defalias('d', 'ls -F --color=auto') |
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113 | 113 | else: |
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114 | 114 | # get icp, imv, imkdir, igrep, irm,... |
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115 | 115 | ip.load('ipy_fsops') |
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116 | 116 | |
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117 | 117 | # and the next best thing to real 'ls -F' |
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118 | 118 | ip.defalias('d','dir /w /og /on') |
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119 | 119 | |
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120 | 120 | ip.set_hook('input_prefilter', dotslash_prefilter_f) |
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121 | 121 | extend_shell_behavior(ip) |
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122 | 122 | |
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123 | 123 | class LastArgFinder: |
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124 | 124 | """ Allow $LA to work as "last argument of previous command", like $! in bash |
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125 | 125 | |
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126 | 126 | To call this in normal IPython code, do LA() |
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127 | 127 | """ |
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128 | 128 | def __call__(self, hist_idx = None): |
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129 | 129 | ip = ipapi.get() |
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130 | 130 | if hist_idx is None: |
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131 | 131 | return str(self) |
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132 | 132 | return ip.IP.input_hist_raw[hist_idx].strip().split()[-1] |
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133 | 133 | def __str__(self): |
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134 | 134 | ip = ipapi.get() |
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135 | 135 | for cmd in reversed(ip.IP.input_hist_raw): |
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136 | 136 | parts = cmd.strip().split() |
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137 | 137 | if len(parts) < 2 or parts[-1] in ['$LA', 'LA()']: |
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138 | 138 | continue |
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139 | 139 | return parts[-1] |
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140 | 140 | return "" |
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141 | 141 | |
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142 | 142 | def dotslash_prefilter_f(self,line): |
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143 | 143 | """ ./foo now runs foo as system command |
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144 | 144 | |
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145 | 145 | Removes the need for doing !./foo |
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146 | 146 | """ |
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147 | 147 | import IPython.genutils |
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148 | 148 | if line.startswith("./"): |
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149 | 149 | return "_ip.system(" + IPython.genutils.make_quoted_expr(line)+")" |
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150 | 150 | raise ipapi.TryNext |
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151 | 151 | |
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152 | 152 | # XXX You do not need to understand the next function! |
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153 | 153 | # This should probably be moved out of profile |
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154 | 154 | |
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155 | 155 | def extend_shell_behavior(ip): |
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156 | 156 | |
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157 | 157 | # Instead of making signature a global variable tie it to IPSHELL. |
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158 | 158 | # In future if it is required to distinguish between different |
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159 | 159 | # shells we can assign a signature per shell basis |
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160 | 160 | ip.IP.__sig__ = 0xa005 |
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161 | 161 | # mark the IPSHELL with this signature |
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162 | 162 | ip.IP.user_ns['__builtins__'].__dict__['__sig__'] = ip.IP.__sig__ |
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163 | 163 | |
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164 | 164 | from IPython.Itpl import ItplNS |
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165 | 165 | from IPython.genutils import shell |
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166 | 166 | # utility to expand user variables via Itpl |
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167 | 167 | # xxx do something sensible with depth? |
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168 | 168 | ip.IP.var_expand = lambda cmd, lvars=None, depth=2: \ |
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169 | 169 | str(ItplNS(cmd, ip.IP.user_ns, get_locals())) |
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170 | 170 | |
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171 | 171 | def get_locals(): |
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172 | 172 | """ Substituting a variable through Itpl deep inside the IPSHELL stack |
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173 | 173 | requires the knowledge of all the variables in scope upto the last |
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174 | 174 | IPSHELL frame. This routine simply merges all the local variables |
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175 | 175 | on the IPSHELL stack without worrying about their scope rules |
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176 | 176 | """ |
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177 | 177 | import sys |
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178 | 178 | # note lambda expression constitues a function call |
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179 | 179 | # hence fno should be incremented by one |
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180 | 180 | getsig = lambda fno: sys._getframe(fno+1).f_globals \ |
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181 | 181 | ['__builtins__'].__dict__['__sig__'] |
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182 | 182 | getlvars = lambda fno: sys._getframe(fno+1).f_locals |
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183 | 183 | # trackback until we enter the IPSHELL |
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184 | 184 | frame_no = 1 |
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185 | 185 | sig = ip.IP.__sig__ |
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186 | 186 | fsig = ~sig |
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187 | 187 | while fsig != sig : |
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188 | 188 | try: |
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189 | 189 | fsig = getsig(frame_no) |
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190 | 190 | except (AttributeError, KeyError): |
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191 | 191 | frame_no += 1 |
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192 | 192 | except ValueError: |
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193 | 193 | # stack is depleted |
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194 | 194 | # call did not originate from IPSHELL |
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195 | 195 | return {} |
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196 | 196 | first_frame = frame_no |
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197 | 197 | # walk further back until we exit from IPSHELL or deplete stack |
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198 | 198 | try: |
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199 | 199 | while(sig == getsig(frame_no+1)): |
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200 | 200 | frame_no += 1 |
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201 | 201 | except (AttributeError, KeyError, ValueError): |
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202 | 202 | pass |
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203 | 203 | # merge the locals from top down hence overriding |
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204 | 204 | # any re-definitions of variables, functions etc. |
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205 | 205 | lvars = {} |
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206 | 206 | for fno in range(frame_no, first_frame-1, -1): |
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207 | 207 | lvars.update(getlvars(fno)) |
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208 | 208 | #print '\n'*5, first_frame, frame_no, '\n', lvars, '\n'*5 #dbg |
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209 | 209 | return lvars |
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210 | 210 | |
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211 | 211 | def _runlines(lines): |
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212 | 212 | """Run a string of one or more lines of source. |
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213 | 213 | |
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214 | 214 | This method is capable of running a string containing multiple source |
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215 | 215 | lines, as if they had been entered at the IPython prompt. Since it |
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216 | 216 | exposes IPython's processing machinery, the given strings can contain |
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217 | 217 | magic calls (%magic), special shell access (!cmd), etc.""" |
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218 | 218 | |
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219 | 219 | # We must start with a clean buffer, in case this is run from an |
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220 | 220 | # interactive IPython session (via a magic, for example). |
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221 | 221 | ip.IP.resetbuffer() |
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222 | 222 | lines = lines.split('\n') |
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223 | 223 | more = 0 |
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224 | 224 | command = '' |
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225 | 225 | for line in lines: |
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226 | 226 | # skip blank lines so we don't mess up the prompt counter, but do |
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227 | 227 | # NOT skip even a blank line if we are in a code block (more is |
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228 | 228 | # true) |
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229 | 229 | # if command is not empty trim the line |
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230 | 230 | if command != '' : |
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231 | 231 | line = line.strip() |
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232 | 232 | # add the broken line to the command |
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233 | 233 | if line and line[-1] == '\\' : |
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234 | 234 | command += line[0:-1] + ' ' |
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235 | 235 | more = True |
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236 | 236 | continue |
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237 | 237 | else : |
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238 | 238 | # add the last (current) line to the command |
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239 | 239 | command += line |
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240 | 240 | if command or more: |
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241 | 241 | # push to raw history, so hist line numbers stay in sync |
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242 | 242 | ip.IP.input_hist_raw.append("# " + command + "\n") |
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243 | 243 | |
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244 | 244 | more = ip.IP.push(ip.IP.prefilter(command,more)) |
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245 | 245 | command = '' |
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246 | 246 | # IPython's runsource returns None if there was an error |
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247 | 247 | # compiling the code. This allows us to stop processing right |
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248 | 248 | # away, so the user gets the error message at the right place. |
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249 | 249 | if more is None: |
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250 | 250 | break |
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251 | 251 | # final newline in case the input didn't have it, so that the code |
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252 | 252 | # actually does get executed |
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253 | 253 | if more: |
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254 | 254 | ip.IP.push('\n') |
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255 | 255 | |
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256 | 256 | ip.IP.runlines = _runlines |
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257 | 257 | |
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258 | 258 | main() |
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