doc/gendoc.py

parsers.c: remove warning: 'size' may be used uninitialized in this function

Some compilers / compiler options (such as gcc 4.7) would emit warnings:

mercurial/parsers.c: In function 'pack_dirstate':
mercurial/parsers.c:306:18: warning: 'size' may be used uninitialized in this function [-Wmaybe-uninitialized]
mercurial/parsers.c:306:12: warning: 'mode' may be used uninitialized in this function [-Wmaybe-uninitialized]

It is apparently not smart enough to figure out how the 'err' arithmetics makes
sure that it can't happen.

'err' is now replaced with simple checks and goto. That might also help the
optimizer when it is inlining getintat().

import os, sys, textwrap
# import from the live mercurial repo
sys.path.insert(0, "..")
# fall back to pure modules if required C extensions are not available
sys.path.append(os.path.join('..', 'mercurial', 'pure'))
from mercurial import demandimport; demandimport.enable()
from mercurial import encoding
from mercurial.commands import table, globalopts
from mercurial.i18n import _
from mercurial.help import helptable
from mercurial import extensions
from mercurial import util

def get_desc(docstr):
    if not docstr:
        return "", ""
    # sanitize
    docstr = docstr.strip("\n")
    docstr = docstr.rstrip()
    shortdesc = docstr.splitlines()[0].strip()

    i = docstr.find("\n")
    if i != -1:
        desc = docstr[i + 2:]
    else:
        desc = shortdesc

    desc = textwrap.dedent(desc)

    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
        allopts = []
        if shortopt:
            allopts.append("-%s" % shortopt)
        if longopt:
            allopts.append("--%s" % longopt)
        desc += default and _(" (default: %s)") % default or ""
        yield (", ".join(allopts), desc)

def get_cmd(cmd, cmdtable):
    d = {}
    attr = cmdtable[cmd]
    cmds = cmd.lstrip("^").split("|")

    d['cmd'] = cmds[0]
    d['aliases'] = cmd.split("|")[1:]
    d['desc'] = get_desc(attr[0].__doc__)
    d['opts'] = list(get_opts(attr[1]))

    s = 'hg ' + cmds[0]
    if len(attr) > 2:
        if not attr[2].startswith('hg'):
            s += ' ' + attr[2]
        else:
            s = attr[2]
    d['synopsis'] = s.strip()

    return d

def section(ui, s):
    ui.write("%s\n%s\n\n" % (s, "-" * encoding.colwidth(s)))

def subsection(ui, s):
    ui.write("%s\n%s\n\n" % (s, '"' * encoding.colwidth(s)))

def subsubsection(ui, s):
    ui.write("%s\n%s\n\n" % (s, "." * encoding.colwidth(s)))

def subsubsubsection(ui, s):
    ui.write("%s\n%s\n\n" % (s, "#" * encoding.colwidth(s)))


def show_doc(ui):
    # print options
    section(ui, _("Options"))
    for optstr, desc in get_opts(globalopts):
        ui.write("%s\n    %s\n\n" % (optstr, desc))

    # print cmds
    section(ui, _("Commands"))
    commandprinter(ui, table, subsection)

    # print topics
    for names, sec, doc in helptable:
        if names[0] == "config":
            # The config help topic is included in the hgrc.5 man
            # page.
            continue
        for name in names:
            ui.write(".. _%s:\n" % name)
        ui.write("\n")
        section(ui, sec)
        if util.safehasattr(doc, '__call__'):
            doc = doc()
        ui.write(doc)
        ui.write("\n")

    section(ui, _("Extensions"))
    ui.write(_("This section contains help for extensions that are "
               "distributed together with Mercurial. Help for other "
               "extensions is available in the help system."))
    ui.write("\n\n"
             ".. contents::\n"
             "   :class: htmlonly\n"
             "   :local:\n"
             "   :depth: 1\n\n")

    for extensionname in sorted(allextensionnames()):
        mod = extensions.load(None, extensionname, None)
        subsection(ui, extensionname)
        ui.write("%s\n\n" % mod.__doc__)
        cmdtable = getattr(mod, 'cmdtable', None)
        if cmdtable:
            subsubsection(ui, _('Commands'))
            commandprinter(ui, cmdtable, subsubsubsection)

def commandprinter(ui, cmdtable, sectionfunc):
    h = {}
    for c, attr in cmdtable.items():
        f = c.split("|")[0]
        f = f.lstrip("^")
        h[f] = c
    cmds = h.keys()
    cmds.sort()

    for f in cmds:
        if f.startswith("debug"):
            continue
        d = get_cmd(h[f], cmdtable)
        sectionfunc(ui, d['cmd'])
        # synopsis
        ui.write("::\n\n")
        synopsislines = d['synopsis'].splitlines()
        for line in synopsislines:
            # some commands (such as rebase) have a multi-line
            # synopsis
            ui.write("   %s\n" % line)
        ui.write('\n')
        # description
        ui.write("%s\n\n" % d['desc'][1])
        # options
        opt_output = list(d['opts'])
        if opt_output:
            opts_len = max([len(line[0]) for line in opt_output])
            ui.write(_("Options:\n\n"))
            for optstr, desc in opt_output:
                if desc:
                    s = "%-*s  %s" % (opts_len, optstr, desc)
                else:
                    s = optstr
                ui.write("%s\n" % s)
            ui.write("\n")
        # aliases
        if d['aliases']:
            ui.write(_("    aliases: %s\n\n") % " ".join(d['aliases']))


def allextensionnames():
    return extensions.enabled().keys() + extensions.disabled().keys()

if __name__ == "__main__":
    show_doc(sys.stdout)