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1 | # pager.py - display output using a pager |
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1 | # pager.py - display output using a pager | |
2 | # |
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2 | # | |
3 | # Copyright 2008 David Soria Parra <dsp@php.net> |
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3 | # Copyright 2008 David Soria Parra <dsp@php.net> | |
4 | # |
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4 | # | |
5 | # This software may be used and distributed according to the terms of the |
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5 | # This software may be used and distributed according to the terms of the | |
6 | # GNU General Public License version 2 or any later version. |
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6 | # GNU General Public License version 2 or any later version. | |
7 | # |
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7 | # | |
8 | # To load the extension, add it to your configuration file: |
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8 | # To load the extension, add it to your configuration file: | |
9 | # |
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9 | # | |
10 | # [extension] |
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10 | # [extension] | |
11 | # pager = |
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11 | # pager = | |
12 | # |
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12 | # | |
13 | # Run "hg help pager" to get info on configuration. |
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13 | # Run "hg help pager" to get info on configuration. | |
14 |
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14 | |||
15 | '''browse command output with an external pager |
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15 | '''browse command output with an external pager | |
16 |
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16 | |||
17 | To set the pager that should be used, set the application variable:: |
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17 | To set the pager that should be used, set the application variable:: | |
18 |
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18 | |||
19 | [pager] |
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19 | [pager] | |
20 | pager = less -FRSX |
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20 | pager = less -FRSX | |
21 |
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21 | |||
22 | If no pager is set, the pager extensions uses the environment variable |
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22 | If no pager is set, the pager extensions uses the environment variable | |
23 | $PAGER. If neither pager.pager, nor $PAGER is set, no pager is used. |
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23 | $PAGER. If neither pager.pager, nor $PAGER is set, no pager is used. | |
24 |
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24 | |||
25 | If you notice "BROKEN PIPE" error messages, you can disable them by |
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25 | If you notice "BROKEN PIPE" error messages, you can disable them by | |
26 | setting:: |
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26 | setting:: | |
27 |
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27 | |||
28 | [pager] |
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28 | [pager] | |
29 | quiet = True |
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29 | quiet = True | |
30 |
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30 | |||
31 | You can disable the pager for certain commands by adding them to the |
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31 | You can disable the pager for certain commands by adding them to the | |
32 | pager.ignore list:: |
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32 | pager.ignore list:: | |
33 |
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33 | |||
34 | [pager] |
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34 | [pager] | |
35 | ignore = version, help, update |
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35 | ignore = version, help, update | |
36 |
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36 | |||
37 | You can also enable the pager only for certain commands using |
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37 | You can also enable the pager only for certain commands using | |
38 | pager.attend. Below is the default list of commands to be paged:: |
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38 | pager.attend. Below is the default list of commands to be paged:: | |
39 |
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39 | |||
40 | [pager] |
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40 | [pager] | |
41 | attend = annotate, cat, diff, export, glog, log, qdiff |
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41 | attend = annotate, cat, diff, export, glog, log, qdiff | |
42 |
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42 | |||
43 | Setting pager.attend to an empty value will cause all commands to be |
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43 | Setting pager.attend to an empty value will cause all commands to be | |
44 | paged. |
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44 | paged. | |
45 |
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45 | |||
46 | If pager.attend is present, pager.ignore will be ignored. |
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46 | If pager.attend is present, pager.ignore will be ignored. | |
47 |
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47 | |||
48 | To ignore global commands like :hg:`version` or :hg:`help`, you have |
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48 | To ignore global commands like :hg:`version` or :hg:`help`, you have | |
49 | to specify them in your user configuration file. |
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49 | to specify them in your user configuration file. | |
50 |
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50 | |||
51 | The --pager=... option can also be used to control when the pager is |
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51 | The --pager=... option can also be used to control when the pager is | |
52 | used. Use a boolean value like yes, no, on, off, or use auto for |
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52 | used. Use a boolean value like yes, no, on, off, or use auto for | |
53 | normal behavior. |
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53 | normal behavior. | |
54 | ''' |
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54 | ''' | |
55 |
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55 | |||
56 | import sys, os, signal, shlex, errno |
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56 | import sys, os, signal, shlex, errno | |
57 | from mercurial import commands, dispatch, util, extensions |
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57 | from mercurial import commands, dispatch, util, extensions | |
58 | from mercurial.i18n import _ |
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58 | from mercurial.i18n import _ | |
59 |
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59 | |||
60 | def _runpager(p): |
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60 | def _runpager(p): | |
61 | if not hasattr(os, 'fork'): |
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61 | if not hasattr(os, 'fork'): | |
62 |
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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 | |||
63 | return |
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65 | return | |
64 | fdin, fdout = os.pipe() |
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66 | fdin, fdout = os.pipe() | |
65 | pid = os.fork() |
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67 | pid = os.fork() | |
66 | if pid == 0: |
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68 | if pid == 0: | |
67 | os.close(fdin) |
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69 | os.close(fdin) | |
68 | os.dup2(fdout, sys.stdout.fileno()) |
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70 | os.dup2(fdout, sys.stdout.fileno()) | |
69 |
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71 | if sys.stderr.isatty(): | |
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72 | os.dup2(fdout, sys.stderr.fileno()) | |||
70 | os.close(fdout) |
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73 | os.close(fdout) | |
71 | return |
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74 | return | |
72 | os.dup2(fdin, sys.stdin.fileno()) |
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75 | os.dup2(fdin, sys.stdin.fileno()) | |
73 | os.close(fdin) |
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76 | os.close(fdin) | |
74 | os.close(fdout) |
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77 | os.close(fdout) | |
75 | try: |
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78 | try: | |
76 | os.execvp('/bin/sh', ['/bin/sh', '-c', p]) |
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79 | os.execvp('/bin/sh', ['/bin/sh', '-c', p]) | |
77 | except OSError, e: |
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80 | except OSError, e: | |
78 | if e.errno == errno.ENOENT: |
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81 | if e.errno == errno.ENOENT: | |
79 | # no /bin/sh, try executing the pager directly |
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82 | # no /bin/sh, try executing the pager directly | |
80 | args = shlex.split(p) |
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83 | args = shlex.split(p) | |
81 | os.execvp(args[0], args) |
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84 | os.execvp(args[0], args) | |
82 | else: |
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85 | else: | |
83 | raise |
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86 | raise | |
84 |
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87 | |||
85 | def uisetup(ui): |
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88 | def uisetup(ui): | |
86 | if ui.plain(): |
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89 | if ui.plain(): | |
87 | return |
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90 | return | |
88 |
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91 | |||
89 | def pagecmd(orig, ui, options, cmd, cmdfunc): |
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92 | def pagecmd(orig, ui, options, cmd, cmdfunc): | |
90 | p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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93 | p = ui.config("pager", "pager", os.environ.get("PAGER")) | |
91 | if p and sys.stdout.isatty() and '--debugger' not in sys.argv: |
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94 | if p and sys.stdout.isatty() and '--debugger' not in sys.argv: | |
92 | attend = ui.configlist('pager', 'attend', attended) |
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95 | attend = ui.configlist('pager', 'attend', attended) | |
93 | auto = options['pager'] == 'auto' |
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96 | auto = options['pager'] == 'auto' | |
94 | always = util.parsebool(options['pager']) |
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97 | always = util.parsebool(options['pager']) | |
95 | if (always or auto and |
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98 | if (always or auto and | |
96 | (cmd in attend or |
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99 | (cmd in attend or | |
97 | (cmd not in ui.configlist('pager', 'ignore') and not attend))): |
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100 | (cmd not in ui.configlist('pager', 'ignore') and not attend))): | |
98 | ui.setconfig('ui', 'formatted', ui.formatted()) |
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101 | ui.setconfig('ui', 'formatted', ui.formatted()) | |
99 | ui.setconfig('ui', 'interactive', False) |
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102 | ui.setconfig('ui', 'interactive', False) | |
100 | _runpager(p) |
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103 | _runpager(p) | |
101 | if ui.configbool('pager', 'quiet'): |
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104 | if ui.configbool('pager', 'quiet'): | |
102 | signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
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105 | signal.signal(signal.SIGPIPE, signal.SIG_DFL) | |
103 | return orig(ui, options, cmd, cmdfunc) |
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106 | return orig(ui, options, cmd, cmdfunc) | |
104 |
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107 | |||
105 | extensions.wrapfunction(dispatch, '_runcommand', pagecmd) |
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108 | extensions.wrapfunction(dispatch, '_runcommand', pagecmd) | |
106 |
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109 | |||
107 | def extsetup(ui): |
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110 | def extsetup(ui): | |
108 | commands.globalopts.append( |
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111 | commands.globalopts.append( | |
109 | ('', 'pager', 'auto', |
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112 | ('', 'pager', 'auto', | |
110 | _("when to paginate (boolean, always, auto, or never)"), |
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113 | _("when to paginate (boolean, always, auto, or never)"), | |
111 | _('TYPE'))) |
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114 | _('TYPE'))) | |
112 |
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115 | |||
113 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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116 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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