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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 -FRX |
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20 | pager = less -FRX | |
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 | You can disable the pager for certain commands by adding them to the |
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25 | You can disable the pager for certain commands by adding them to the | |
26 | pager.ignore list:: |
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26 | pager.ignore list:: | |
27 |
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27 | |||
28 | [pager] |
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28 | [pager] | |
29 | ignore = version, help, update |
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29 | ignore = version, help, update | |
30 |
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30 | |||
31 | You can also enable the pager only for certain commands using |
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31 | You can also enable the pager only for certain commands using | |
32 | pager.attend. Below is the default list of commands to be paged:: |
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32 | pager.attend. Below is the default list of commands to be paged:: | |
33 |
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33 | |||
34 | [pager] |
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34 | [pager] | |
35 | attend = annotate, cat, diff, export, glog, log, qdiff |
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35 | attend = annotate, cat, diff, export, glog, log, qdiff | |
36 |
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36 | |||
37 | Setting pager.attend to an empty value will cause all commands to be |
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37 | Setting pager.attend to an empty value will cause all commands to be | |
38 | paged. |
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38 | paged. | |
39 |
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39 | |||
40 | If pager.attend is present, pager.ignore will be ignored. |
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40 | If pager.attend is present, pager.ignore will be ignored. | |
41 |
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41 | |||
42 | Lastly, you can enable and disable paging for individual commands with |
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42 | Lastly, you can enable and disable paging for individual commands with | |
43 | the attend-<command> option. This setting takes precedence over |
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43 | the attend-<command> option. This setting takes precedence over | |
44 | existing attend and ignore options and defaults:: |
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44 | existing attend and ignore options and defaults:: | |
45 |
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45 | |||
46 | [pager] |
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46 | [pager] | |
47 | attend-cat = false |
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47 | attend-cat = false | |
48 |
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48 | |||
49 | To ignore global commands like :hg:`version` or :hg:`help`, you have |
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49 | To ignore global commands like :hg:`version` or :hg:`help`, you have | |
50 | to specify them in your user configuration file. |
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50 | to specify them in your user configuration file. | |
51 |
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51 | |||
52 | The --pager=... option can also be used to control when the pager is |
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52 | The --pager=... option can also be used to control when the pager is | |
53 | used. Use a boolean value like yes, no, on, off, or use auto for |
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53 | used. Use a boolean value like yes, no, on, off, or use auto for | |
54 | normal behavior. |
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54 | normal behavior. | |
55 |
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55 | |||
56 | ''' |
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56 | ''' | |
57 |
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57 | |||
58 | import atexit, sys, os, signal, subprocess |
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58 | import atexit, sys, os, signal, subprocess | |
59 | from mercurial import commands, dispatch, util, extensions, cmdutil |
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59 | from mercurial import commands, dispatch, util, extensions, cmdutil | |
60 | from mercurial.i18n import _ |
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60 | from mercurial.i18n import _ | |
61 |
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61 | |||
62 | # Note for extension authors: ONLY specify testedwith = 'internal' for |
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62 | # Note for extension authors: ONLY specify testedwith = 'internal' for | |
63 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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63 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should | |
64 | # be specifying the version(s) of Mercurial they are tested with, or |
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64 | # be specifying the version(s) of Mercurial they are tested with, or | |
65 | # leave the attribute unspecified. |
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65 | # leave the attribute unspecified. | |
66 | testedwith = 'internal' |
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66 | testedwith = 'internal' | |
67 |
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67 | |||
68 |
def _pager |
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68 | def _runpager(ui, p): | |
69 | pager = subprocess.Popen(p, shell=True, bufsize=-1, |
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69 | pager = subprocess.Popen(p, shell=True, bufsize=-1, | |
70 | close_fds=util.closefds, stdin=subprocess.PIPE, |
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70 | close_fds=util.closefds, stdin=subprocess.PIPE, | |
71 | stdout=sys.stdout, stderr=sys.stderr) |
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71 | stdout=sys.stdout, stderr=sys.stderr) | |
72 |
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72 | |||
73 | stdout = os.dup(sys.stdout.fileno()) |
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73 | stdout = os.dup(sys.stdout.fileno()) | |
74 | stderr = os.dup(sys.stderr.fileno()) |
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74 | stderr = os.dup(sys.stderr.fileno()) | |
75 | os.dup2(pager.stdin.fileno(), sys.stdout.fileno()) |
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75 | os.dup2(pager.stdin.fileno(), sys.stdout.fileno()) | |
76 | if ui._isatty(sys.stderr): |
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76 | if ui._isatty(sys.stderr): | |
77 | os.dup2(pager.stdin.fileno(), sys.stderr.fileno()) |
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77 | os.dup2(pager.stdin.fileno(), sys.stderr.fileno()) | |
78 |
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78 | |||
79 | @atexit.register |
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79 | @atexit.register | |
80 | def killpager(): |
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80 | def killpager(): | |
81 | if util.safehasattr(signal, "SIGINT"): |
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81 | if util.safehasattr(signal, "SIGINT"): | |
82 | signal.signal(signal.SIGINT, signal.SIG_IGN) |
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82 | signal.signal(signal.SIGINT, signal.SIG_IGN) | |
83 | pager.stdin.close() |
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83 | pager.stdin.close() | |
84 | os.dup2(stdout, sys.stdout.fileno()) |
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84 | os.dup2(stdout, sys.stdout.fileno()) | |
85 | os.dup2(stderr, sys.stderr.fileno()) |
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85 | os.dup2(stderr, sys.stderr.fileno()) | |
86 | pager.wait() |
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86 | pager.wait() | |
87 |
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87 | |||
88 | def _runpager(ui, p): |
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89 | _pagersubprocess(ui, p) |
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90 |
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91 | def uisetup(ui): |
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88 | def uisetup(ui): | |
92 | if '--debugger' in sys.argv or not ui.formatted(): |
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89 | if '--debugger' in sys.argv or not ui.formatted(): | |
93 | return |
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90 | return | |
94 |
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91 | |||
95 | def pagecmd(orig, ui, options, cmd, cmdfunc): |
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92 | def pagecmd(orig, ui, options, cmd, cmdfunc): | |
96 | p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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93 | p = ui.config("pager", "pager", os.environ.get("PAGER")) | |
97 | usepager = False |
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94 | usepager = False | |
98 | always = util.parsebool(options['pager']) |
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95 | always = util.parsebool(options['pager']) | |
99 | auto = options['pager'] == 'auto' |
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96 | auto = options['pager'] == 'auto' | |
100 |
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97 | |||
101 | if not p: |
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98 | if not p: | |
102 | pass |
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99 | pass | |
103 | elif always: |
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100 | elif always: | |
104 | usepager = True |
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101 | usepager = True | |
105 | elif not auto: |
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102 | elif not auto: | |
106 | usepager = False |
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103 | usepager = False | |
107 | else: |
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104 | else: | |
108 | attend = ui.configlist('pager', 'attend', attended) |
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105 | attend = ui.configlist('pager', 'attend', attended) | |
109 | ignore = ui.configlist('pager', 'ignore') |
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106 | ignore = ui.configlist('pager', 'ignore') | |
110 | cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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107 | cmds, _ = cmdutil.findcmd(cmd, commands.table) | |
111 |
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108 | |||
112 | for cmd in cmds: |
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109 | for cmd in cmds: | |
113 | var = 'attend-%s' % cmd |
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110 | var = 'attend-%s' % cmd | |
114 | if ui.config('pager', var): |
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111 | if ui.config('pager', var): | |
115 | usepager = ui.configbool('pager', var) |
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112 | usepager = ui.configbool('pager', var) | |
116 | break |
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113 | break | |
117 | if (cmd in attend or |
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114 | if (cmd in attend or | |
118 | (cmd not in ignore and not attend)): |
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115 | (cmd not in ignore and not attend)): | |
119 | usepager = True |
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116 | usepager = True | |
120 | break |
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117 | break | |
121 |
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118 | |||
122 | setattr(ui, 'pageractive', usepager) |
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119 | setattr(ui, 'pageractive', usepager) | |
123 |
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120 | |||
124 | if usepager: |
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121 | if usepager: | |
125 | ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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122 | ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') | |
126 | ui.setconfig('ui', 'interactive', False, 'pager') |
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123 | ui.setconfig('ui', 'interactive', False, 'pager') | |
127 | if util.safehasattr(signal, "SIGPIPE"): |
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124 | if util.safehasattr(signal, "SIGPIPE"): | |
128 | signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
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125 | signal.signal(signal.SIGPIPE, signal.SIG_DFL) | |
129 | _runpager(ui, p) |
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126 | _runpager(ui, p) | |
130 | return orig(ui, options, cmd, cmdfunc) |
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127 | return orig(ui, options, cmd, cmdfunc) | |
131 |
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128 | |||
132 | # Wrap dispatch._runcommand after color is loaded so color can see |
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129 | # Wrap dispatch._runcommand after color is loaded so color can see | |
133 | # ui.pageractive. Otherwise, if we loaded first, color's wrapped |
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130 | # ui.pageractive. Otherwise, if we loaded first, color's wrapped | |
134 | # dispatch._runcommand would run without having access to ui.pageractive. |
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131 | # dispatch._runcommand would run without having access to ui.pageractive. | |
135 | def afterloaded(loaded): |
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132 | def afterloaded(loaded): | |
136 | extensions.wrapfunction(dispatch, '_runcommand', pagecmd) |
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133 | extensions.wrapfunction(dispatch, '_runcommand', pagecmd) | |
137 | extensions.afterloaded('color', afterloaded) |
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134 | extensions.afterloaded('color', afterloaded) | |
138 |
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135 | |||
139 | def extsetup(ui): |
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136 | def extsetup(ui): | |
140 | commands.globalopts.append( |
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137 | commands.globalopts.append( | |
141 | ('', 'pager', 'auto', |
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138 | ('', 'pager', 'auto', | |
142 | _("when to paginate (boolean, always, auto, or never)"), |
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139 | _("when to paginate (boolean, always, auto, or never)"), | |
143 | _('TYPE'))) |
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140 | _('TYPE'))) | |
144 |
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141 | |||
145 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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142 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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