Mercurial > hg
annotate hgext/pager.py @ 23752:70d8be6299ab
trydiff: make addindexmeta() unconditionally add index meta
The conditional-ness is not clear from the name and there is only one
caller, so it's clearer to check on the call site. Moving it also
makes addindexmeta() no longer close on the 'opts' variable.
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 07 Jan 2015 08:54:26 -0800 |
parents | bcddddcf0b54 |
children | afdf5f6ab37a |
rev | line source |
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1 # pager.py - display output using a pager |
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2 # |
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3 # Copyright 2008 David Soria Parra <dsp@php.net> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 # |
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8 # To load the extension, add it to your configuration file: |
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9 # |
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10 # [extension] |
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11 # pager = |
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12 # |
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13 # Run "hg help pager" to get info on configuration. |
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14 |
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15 '''browse command output with an external pager |
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16 |
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17 To set the pager that should be used, set the application variable:: |
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18 |
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19 [pager] |
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20 pager = less -FRX |
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21 |
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22 If no pager is set, the pager extensions uses the environment variable |
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23 $PAGER. If neither pager.pager, nor $PAGER is set, no pager is used. |
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24 |
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25 You can disable the pager for certain commands by adding them to the |
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26 pager.ignore list:: |
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27 |
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28 [pager] |
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29 ignore = version, help, update |
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30 |
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31 You can also enable the pager only for certain commands using |
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32 pager.attend. Below is the default list of commands to be paged:: |
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33 |
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34 [pager] |
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35 attend = annotate, cat, diff, export, glog, log, qdiff |
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36 |
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37 Setting pager.attend to an empty value will cause all commands to be |
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38 paged. |
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39 |
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40 If pager.attend is present, pager.ignore will be ignored. |
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41 |
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42 Lastly, you can enable and disable paging for individual commands with |
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43 the attend-<command> option. This setting takes precedence over |
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44 existing attend and ignore options and defaults:: |
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45 |
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46 [pager] |
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47 attend-cat = false |
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48 |
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49 To ignore global commands like :hg:`version` or :hg:`help`, you have |
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50 to specify them in your user configuration file. |
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51 |
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52 The --pager=... option can also be used to control when the pager is |
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53 used. Use a boolean value like yes, no, on, off, or use auto for |
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54 normal behavior. |
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55 |
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56 ''' |
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57 |
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58 import atexit, sys, os, signal, subprocess, errno, shlex |
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59 from mercurial import commands, dispatch, util, extensions, cmdutil |
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60 from mercurial.i18n import _ |
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61 |
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62 testedwith = 'internal' |
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63 |
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64 def _pagerfork(ui, p): |
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65 if not util.safehasattr(os, 'fork'): |
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66 sys.stdout = util.popen(p, 'wb') |
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67 if ui._isatty(sys.stderr): |
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68 sys.stderr = sys.stdout |
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69 return |
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70 fdin, fdout = os.pipe() |
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71 pid = os.fork() |
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72 if pid == 0: |
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73 os.close(fdin) |
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74 os.dup2(fdout, sys.stdout.fileno()) |
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75 if ui._isatty(sys.stderr): |
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76 os.dup2(fdout, sys.stderr.fileno()) |
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77 os.close(fdout) |
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78 return |
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79 os.dup2(fdin, sys.stdin.fileno()) |
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80 os.close(fdin) |
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81 os.close(fdout) |
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82 try: |
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83 os.execvp('/bin/sh', ['/bin/sh', '-c', p]) |
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84 except OSError, e: |
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85 if e.errno == errno.ENOENT: |
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86 # no /bin/sh, try executing the pager directly |
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87 args = shlex.split(p) |
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88 os.execvp(args[0], args) |
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89 else: |
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90 raise |
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91 |
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92 def _pagersubprocess(ui, p): |
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93 pager = subprocess.Popen(p, shell=True, bufsize=-1, |
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94 close_fds=util.closefds, stdin=subprocess.PIPE, |
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95 stdout=sys.stdout, stderr=sys.stderr) |
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96 |
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97 stdout = os.dup(sys.stdout.fileno()) |
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98 stderr = os.dup(sys.stderr.fileno()) |
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99 os.dup2(pager.stdin.fileno(), sys.stdout.fileno()) |
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100 if ui._isatty(sys.stderr): |
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101 os.dup2(pager.stdin.fileno(), sys.stderr.fileno()) |
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102 |
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103 @atexit.register |
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104 def killpager(): |
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105 if util.safehasattr(signal, "SIGINT"): |
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106 signal.signal(signal.SIGINT, signal.SIG_IGN) |
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107 pager.stdin.close() |
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108 os.dup2(stdout, sys.stdout.fileno()) |
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109 os.dup2(stderr, sys.stderr.fileno()) |
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110 pager.wait() |
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111 |
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112 def _runpager(ui, p): |
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113 # The subprocess module shipped with Python <= 2.4 is buggy (issue3533). |
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114 # The compat version is buggy on Windows (issue3225), but has been shipping |
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115 # with hg for a long time. Preserve existing functionality. |
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116 if sys.version_info >= (2, 5): |
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117 _pagersubprocess(ui, p) |
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118 else: |
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119 _pagerfork(ui, p) |
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120 |
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121 def uisetup(ui): |
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122 if '--debugger' in sys.argv or not ui.formatted(): |
11414 | 123 return |
124 | |
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125 def pagecmd(orig, ui, options, cmd, cmdfunc): |
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126 p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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127 usepager = False |
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128 always = util.parsebool(options['pager']) |
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129 auto = options['pager'] == 'auto' |
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130 |
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131 if not p: |
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132 pass |
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133 elif always: |
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134 usepager = True |
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135 elif not auto: |
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136 usepager = False |
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137 else: |
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138 attend = ui.configlist('pager', 'attend', attended) |
21280 | 139 ignore = ui.configlist('pager', 'ignore') |
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140 cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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141 |
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142 for cmd in cmds: |
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143 var = 'attend-%s' % cmd |
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144 if ui.config('pager', var): |
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145 usepager = ui.configbool('pager', var) |
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146 break |
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147 if (cmd in attend or |
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148 (cmd not in ignore and not attend)): |
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149 usepager = True |
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150 break |
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151 |
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152 if usepager: |
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153 ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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154 ui.setconfig('ui', 'interactive', False, 'pager') |
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155 if util.safehasattr(signal, "SIGPIPE"): |
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156 signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
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157 _runpager(ui, p) |
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158 return orig(ui, options, cmd, cmdfunc) |
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159 |
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160 extensions.wrapfunction(dispatch, '_runcommand', pagecmd) |
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161 |
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162 def extsetup(ui): |
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163 commands.globalopts.append( |
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164 ('', 'pager', 'auto', |
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165 _("when to paginate (boolean, always, auto, or never)"), |
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166 _('TYPE'))) |
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167 |
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168 attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |