annotate mercurial/help.py @ 9583:0491be4448bf

bisect: limit considered set to descendants of first good rev
author Matt Mackall <mpm@selenic.com>
date Mon, 12 Oct 2009 14:59:28 -0500
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1 # help.py - help data for mercurial
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2 #
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3 # Copyright 2006 Matt Mackall <mpm@selenic.com>
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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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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 from i18n import gettext, _
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9 import sys, os
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10 import extensions, util
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11
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12
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13 def moduledoc(file):
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14 '''return the top-level python documentation for the given file
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15
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16 Loosely inspired by pydoc.source_synopsis(), but rewritten to handle \'''
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17 as well as """ and to return the whole text instead of just the synopsis'''
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18 result = []
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19
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20 line = file.readline()
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21 while line[:1] == '#' or not line.strip():
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22 line = file.readline()
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23 if not line: break
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24
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25 start = line[:3]
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26 if start == '"""' or start == "'''":
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27 line = line[3:]
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28 while line:
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29 if line.rstrip().endswith(start):
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30 line = line.split(start)[0]
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31 if line:
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32 result.append(line)
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33 break
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34 elif not line:
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35 return None # unmatched delimiter
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36 result.append(line)
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37 line = file.readline()
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38 else:
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39 return None
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40
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41 return ''.join(result)
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42
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43 def listexts(header, exts, maxlength):
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44 '''return a text listing of the given extensions'''
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45 if not exts:
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46 return ''
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47 result = '\n%s\n\n' % header
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48 for name, desc in sorted(exts.iteritems()):
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49 result += ' %-*s %s\n' % (maxlength + 2, ':%s:' % name, desc)
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50 return result
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51
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52 def extshelp():
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53 doc = loaddoc('extensions')()
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54
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55 exts, maxlength = extensions.enabled()
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56 doc += listexts(_('enabled extensions:'), exts, maxlength)
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57
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58 exts, maxlength = extensions.disabled()
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59 doc += listexts(_('disabled extensions:'), exts, maxlength)
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60
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61 return doc
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62
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63 def loaddoc(topic):
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64 """Return a delayed loader for help/topic.txt."""
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65
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66 def loader():
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67 if hasattr(sys, 'frozen'):
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68 module = sys.executable
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69 else:
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70 module = __file__
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71 base = os.path.dirname(module)
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72
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73 for dir in ('.', '..'):
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74 docdir = os.path.join(base, dir, 'help')
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75 if os.path.isdir(docdir):
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76 break
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77
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78 path = os.path.join(docdir, topic + ".txt")
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79 return gettext(open(path).read())
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80 return loader
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81
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82 helptable = (
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83 (["dates"], _("Date Formats"), loaddoc('dates')),
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84 (["patterns"], _("File Name Patterns"), loaddoc('patterns')),
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85 (['environment', 'env'], _('Environment Variables'), loaddoc('environment')),
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86 (['revs', 'revisions'], _('Specifying Single Revisions'), loaddoc('revisions')),
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87 (['mrevs', 'multirevs'], _('Specifying Multiple Revisions'), loaddoc('multirevs')),
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88 (['diffs'], _('Diff Formats'), loaddoc('diffs')),
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89 (['templating', 'templates'], _('Template Usage'), loaddoc('templates')),
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90 (['urls'], _('URL Paths'), loaddoc('urls')),
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91 (["extensions"], _("Using additional features"), extshelp),
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92 )