Mercurial > hg
view doc/gendoc.py @ 48793:6e559391f96e
tracked-key: remove the dual write and rename to tracked-hint
The dual-write approach was mostly useless. As explained in the previous version
of the help, the key had to be read twice before we could cache a value.
However this "read twice" limitation actually also apply to any usage of the
key. If some operation wants to rely of the "same value == same tracked set"
property it would need to read the value before, and after running that
operation (or at least, after, in all cases). So it cannot be sure the operation
it did is "valid" until checking the key after the operation. As a resultat such
operation can only be read-only or rollbackable.
This reduce the utility of the "same value == same tracked set" a lot.
So it seems simpler to drop the double write and to update the documentation to
highlight that this file does not garantee race-free operation. As a result the
"key" is demoted to a "hint".
Documentation is updated accordingly.
Differential Revision: https://phab.mercurial-scm.org/D12201
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 17 Feb 2022 07:34:49 +0100 |
parents | 85ec89c47a04 |
children | 6000f5b25c9b 1b6e381521c5 |
line wrap: on
line source
#!/usr/bin/env python3 """usage: %s DOC ... where DOC is the name of a document """ from __future__ import absolute_import import os import sys import textwrap try: import msvcrt msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY) except ImportError: pass # This script is executed during installs and may not have C extensions # available. Relax C module requirements. os.environ['HGMODULEPOLICY'] = 'allow' # import from the live mercurial repo sys.path.insert(0, "..") from mercurial import demandimport demandimport.enable() from mercurial import ( commands, encoding, extensions, fancyopts, help, minirst, pycompat, ui as uimod, ) from mercurial.i18n import ( gettext, _, ) from mercurial.utils import stringutil table = commands.table globalopts = commands.globalopts helptable = help.helptable loaddoc = help.loaddoc def get_desc(docstr): if not docstr: return b"", b"" # sanitize docstr = docstr.strip(b"\n") docstr = docstr.rstrip() shortdesc = docstr.splitlines()[0].strip() i = docstr.find(b"\n") if i != -1: desc = docstr[i + 2 :] else: desc = shortdesc desc = textwrap.dedent(desc.decode('latin1')).encode('latin1') return (shortdesc, desc) def get_opts(opts): for opt in opts: if len(opt) == 5: shortopt, longopt, default, desc, optlabel = opt else: shortopt, longopt, default, desc = opt optlabel = _(b"VALUE") allopts = [] if shortopt: allopts.append(b"-%s" % shortopt) if longopt: allopts.append(b"--%s" % longopt) if isinstance(default, list): allopts[-1] += b" <%s[+]>" % optlabel elif (default is not None) and not isinstance(default, bool): allopts[-1] += b" <%s>" % optlabel if b'\n' in desc: # only remove line breaks and indentation desc = b' '.join(l.lstrip() for l in desc.split(b'\n')) if isinstance(default, fancyopts.customopt): default = default.getdefaultvalue() if default: default = stringutil.forcebytestr(default) desc += _(b" (default: %s)") % default yield (b", ".join(allopts), desc) def get_cmd(cmd, cmdtable): d = {} attr = cmdtable[cmd] cmds = cmd.lstrip(b"^").split(b"|") d[b'cmd'] = cmds[0] d[b'aliases'] = cmd.split(b"|")[1:] d[b'desc'] = get_desc(gettext(pycompat.getdoc(attr[0]))) d[b'opts'] = list(get_opts(attr[1])) s = b'hg ' + cmds[0] if len(attr) > 2: if not attr[2].startswith(b'hg'): s += b' ' + attr[2] else: s = attr[2] d[b'synopsis'] = s.strip() return d def showdoc(ui): # print options ui.write(minirst.section(_(b"Options"))) multioccur = False for optstr, desc in get_opts(globalopts): ui.write(b"%s\n %s\n\n" % (optstr, desc)) if optstr.endswith(b"[+]>"): multioccur = True if multioccur: ui.write(_(b"\n[+] marked option can be specified multiple times\n")) ui.write(b"\n") # print cmds ui.write(minirst.section(_(b"Commands"))) commandprinter(ui, table, minirst.subsection, minirst.subsubsection) # print help topics # The config help topic is included in the hgrc.5 man page. helpprinter(ui, helptable, minirst.section, exclude=[b'config']) ui.write(minirst.section(_(b"Extensions"))) ui.write( _( b"This section contains help for extensions that are " b"distributed together with Mercurial. Help for other " b"extensions is available in the help system." ) ) ui.write( ( b"\n\n" b".. contents::\n" b" :class: htmlonly\n" b" :local:\n" b" :depth: 1\n\n" ) ) for extensionname in sorted(allextensionnames()): mod = extensions.load(ui, extensionname, None) ui.write(minirst.subsection(extensionname)) ui.write(b"%s\n\n" % gettext(pycompat.getdoc(mod))) cmdtable = getattr(mod, 'cmdtable', None) if cmdtable: ui.write(minirst.subsubsection(_(b'Commands'))) commandprinter( ui, cmdtable, minirst.subsubsubsection, minirst.subsubsubsubsection, ) def showtopic(ui, topic): extrahelptable = [ ([b"common"], b'', loaddoc(b'common'), help.TOPIC_CATEGORY_MISC), ([b"hg.1"], b'', loaddoc(b'hg.1'), help.TOPIC_CATEGORY_CONFIG), ([b"hg-ssh.8"], b'', loaddoc(b'hg-ssh.8'), help.TOPIC_CATEGORY_CONFIG), ( [b"hgignore.5"], b'', loaddoc(b'hgignore.5'), help.TOPIC_CATEGORY_CONFIG, ), ([b"hgrc.5"], b'', loaddoc(b'hgrc.5'), help.TOPIC_CATEGORY_CONFIG), ( [b"hgignore.5.gendoc"], b'', loaddoc(b'hgignore'), help.TOPIC_CATEGORY_CONFIG, ), ( [b"hgrc.5.gendoc"], b'', loaddoc(b'config'), help.TOPIC_CATEGORY_CONFIG, ), ] helpprinter(ui, helptable + extrahelptable, None, include=[topic]) def helpprinter(ui, helptable, sectionfunc, include=[], exclude=[]): for h in helptable: names, sec, doc = h[0:3] if exclude and names[0] in exclude: continue if include and names[0] not in include: continue for name in names: ui.write(b".. _%s:\n" % name) ui.write(b"\n") if sectionfunc: ui.write(sectionfunc(sec)) if callable(doc): doc = doc(ui) ui.write(doc) ui.write(b"\n") def commandprinter(ui, cmdtable, sectionfunc, subsectionfunc): """Render restructuredtext describing a list of commands and their documentations, grouped by command category. Args: ui: UI object to write the output to cmdtable: a dict that maps a string of the command name plus its aliases (separated with pipes) to a 3-tuple of (the command's function, a list of its option descriptions, and a string summarizing available options). Example, with aliases added for demonstration purposes: 'phase|alias1|alias2': ( <function phase at 0x7f0816b05e60>, [ ('p', 'public', False, 'set changeset phase to public'), ..., ('r', 'rev', [], 'target revision', 'REV')], '[-p|-d|-s] [-f] [-r] [REV...]' ) sectionfunc: minirst function to format command category headers subsectionfunc: minirst function to format command headers """ h = {} for c, attr in cmdtable.items(): f = c.split(b"|")[0] f = f.lstrip(b"^") h[f] = c cmds = h.keys() def helpcategory(cmd): """Given a canonical command name from `cmds` (above), retrieve its help category. If helpcategory is None, default to CATEGORY_NONE. """ fullname = h[cmd] details = cmdtable[fullname] helpcategory = details[0].helpcategory return helpcategory or help.registrar.command.CATEGORY_NONE cmdsbycategory = {category: [] for category in help.CATEGORY_ORDER} for cmd in cmds: # If a command category wasn't registered, the command won't get # rendered below, so we raise an AssertionError. if helpcategory(cmd) not in cmdsbycategory: raise AssertionError( "The following command did not register its (category) in " "help.CATEGORY_ORDER: %s (%s)" % (cmd, helpcategory(cmd)) ) cmdsbycategory[helpcategory(cmd)].append(cmd) # Print the help for each command. We present the commands grouped by # category, and we use help.CATEGORY_ORDER as a guide for a helpful order # in which to present the categories. for category in help.CATEGORY_ORDER: categorycmds = cmdsbycategory[category] if not categorycmds: # Skip empty categories continue # Print a section header for the category. # For now, the category header is at the same level as the headers for # the commands in the category; this is fixed in the next commit. ui.write(sectionfunc(help.CATEGORY_NAMES[category])) # Print each command in the category for f in sorted(categorycmds): if f.startswith(b"debug"): continue d = get_cmd(h[f], cmdtable) ui.write(subsectionfunc(d[b'cmd'])) # short description ui.write(d[b'desc'][0]) # synopsis ui.write(b"::\n\n") synopsislines = d[b'synopsis'].splitlines() for line in synopsislines: # some commands (such as rebase) have a multi-line # synopsis ui.write(b" %s\n" % line) ui.write(b'\n') # description ui.write(b"%s\n\n" % d[b'desc'][1]) # options opt_output = list(d[b'opts']) if opt_output: opts_len = max([len(line[0]) for line in opt_output]) ui.write(_(b"Options:\n\n")) multioccur = False for optstr, desc in opt_output: if desc: s = b"%-*s %s" % (opts_len, optstr, desc) else: s = optstr ui.write(b"%s\n" % s) if optstr.endswith(b"[+]>"): multioccur = True if multioccur: ui.write( _( b"\n[+] marked option can be specified" b" multiple times\n" ) ) ui.write(b"\n") # aliases if d[b'aliases']: # Note the empty comment, this is required to separate this # (which should be a blockquote) from any preceding things (such # as a definition list). ui.write( _(b"..\n\n aliases: %s\n\n") % b" ".join(d[b'aliases']) ) def allextensionnames(): return set(extensions.enabled().keys()) | set(extensions.disabled().keys()) if __name__ == "__main__": doc = b'hg.1.gendoc' if len(sys.argv) > 1: doc = encoding.strtolocal(sys.argv[1]) ui = uimod.ui.load() # Trigger extensions to load. This is disabled by default because it uses # the current user's configuration, which is often not what is wanted. if encoding.environ.get(b'GENDOC_LOAD_CONFIGURED_EXTENSIONS', b'0') != b'0': extensions.loadall(ui) if doc == b'hg.1.gendoc': showdoc(ui) else: showtopic(ui, encoding.strtolocal(sys.argv[1]))