Mercurial > hg
annotate hgext/pager.py @ 14076:924c82157d46
url: move URL parsing functions into util to improve startup time
The introduction of the new URL parsing code has created a startup
time regression. This is mainly due to the use of url.hasscheme() in
the ui class. It ends up importing many libraries that the url module
requires.
This fix helps marginally, but if we can get rid of the urllib import
in the URL parser all together, startup time will go back to normal.
perfstartup time before the URL refactoring (8796fb6af67e):
! wall 0.050692 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
current startup time (139fb11210bb):
! wall 0.070685 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
after this change:
! wall 0.064667 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
author | Brodie Rao <brodie@bitheap.org> |
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date | Sat, 30 Apr 2011 09:43:20 -0700 |
parents | 994510694b1d |
children | 76f295eaed86 |
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 |
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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 -FRSX |
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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 If you notice "BROKEN PIPE" error messages, you can disable them by |
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26 setting:: |
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27 |
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28 [pager] |
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29 quiet = True |
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30 |
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31 You can disable the pager for certain commands by adding them to the |
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32 pager.ignore list:: |
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33 |
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34 [pager] |
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35 ignore = version, help, update |
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36 |
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37 You can also enable the pager only for certain commands using |
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38 pager.attend. Below is the default list of commands to be paged:: |
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39 |
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40 [pager] |
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41 attend = annotate, cat, diff, export, glog, log, qdiff |
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42 |
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43 Setting pager.attend to an empty value will cause all commands to be |
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44 paged. |
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45 |
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46 If pager.attend is present, pager.ignore will be ignored. |
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47 |
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48 To ignore global commands like :hg:`version` or :hg:`help`, you have |
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49 to specify them in your user configuration file. |
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50 |
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51 The --pager=... option can also be used to control when the pager is |
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52 used. Use a boolean value like yes, no, on, off, or use auto for |
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53 normal behavior. |
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54 ''' |
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55 |
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56 import sys, os, signal, shlex, errno |
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57 from mercurial import commands, dispatch, util, extensions |
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58 from mercurial.i18n import _ |
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59 |
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60 def _runpager(p): |
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61 if not hasattr(os, 'fork'): |
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62 sys.stdout = util.popen(p, 'wb') |
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63 if sys.stderr.isatty(): |
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64 sys.stderr = sys.stdout |
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65 return |
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66 fdin, fdout = os.pipe() |
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67 pid = os.fork() |
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68 if pid == 0: |
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69 os.close(fdin) |
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70 os.dup2(fdout, sys.stdout.fileno()) |
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71 if sys.stderr.isatty(): |
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72 os.dup2(fdout, sys.stderr.fileno()) |
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73 os.close(fdout) |
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74 return |
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75 os.dup2(fdin, sys.stdin.fileno()) |
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76 os.close(fdin) |
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77 os.close(fdout) |
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78 try: |
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79 os.execvp('/bin/sh', ['/bin/sh', '-c', p]) |
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80 except OSError, e: |
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81 if e.errno == errno.ENOENT: |
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82 # no /bin/sh, try executing the pager directly |
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83 args = shlex.split(p) |
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84 os.execvp(args[0], args) |
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85 else: |
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86 raise |
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87 |
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88 def uisetup(ui): |
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90 return | |
91 | |
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92 def pagecmd(orig, ui, options, cmd, cmdfunc): |
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93 p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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95 attend = ui.configlist('pager', 'attend', attended) |
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96 auto = options['pager'] == 'auto' |
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97 always = util.parsebool(options['pager']) |
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98 if (always or auto and |
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99 (cmd in attend or |
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100 (cmd not in ui.configlist('pager', 'ignore') and not attend))): |
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101 ui.setconfig('ui', 'formatted', ui.formatted()) |
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102 ui.setconfig('ui', 'interactive', False) |
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103 _runpager(p) |
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104 if ui.configbool('pager', 'quiet'): |
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105 signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
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106 return orig(ui, options, cmd, cmdfunc) |
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107 |
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108 extensions.wrapfunction(dispatch, '_runcommand', pagecmd) |
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109 |
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110 def extsetup(ui): |
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111 commands.globalopts.append( |
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112 ('', 'pager', 'auto', |
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113 _("when to paginate (boolean, always, auto, or never)"), |
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pager: add global --pager=<auto/boolean> option
Brodie Rao <brodie@bitheap.org>
parents:
12083
diff
changeset
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114 _('TYPE'))) |
04f6de46bf3a
pager: add global --pager=<auto/boolean> option
Brodie Rao <brodie@bitheap.org>
parents:
12083
diff
changeset
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115 |
9841
7cd6dee6fe37
pager: provide a default attend list
Brodie Rao <me+hg@dackz.net>
parents:
9267
diff
changeset
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116 attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |