view doc/gendoc.py @ 43385:6469c23a40a2 stable

fsmonitor: refresh pywatchman with upstream

This commit vendors pywatchman commit 259dc66dc9591f9b7ce76d0275bb1065f390c9b1
from upstream without modifications. The previously vendored pywatchman
from changeset 16f4b341288d was from Git commit c77452.

This commit effectively undoes the following Mercurial changesets:

* dd35abc409ee fsmonitor: correct an error message
* b1f62cd39b5c fsmonitor: layer on another hack in bser.c for os.stat()
  compat (issue5811)
* c31ce080eb75 py3: convert arguments, cwd and env to native strings when
  spawning subprocess
* 876494fd967d cleanup: delete lots of unused local variables
* 57264906a996 watchman: add the possibility to set the exact watchman
  binary location

The newly-vendored code has support for specifying the binary location,
so 57264906a996 does not need applied. But we do need to modify our
code to specify a proper argument name.

876494fd967d is not important, so it will be ignored.

c31ce080eb75 globally changed the code base to always pass
str to subprocess. But pywatchman's code is Python 3 clean, so
we don't need to do this.

This leaves dd35abc409ee and b1f62cd39b5c, which will be re-applied in
subsequent commits.

Differential Revision: https://phab.mercurial-scm.org/D7201

#!/usr/bin/env python
"""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[r'HGMODULEPOLICY'] = r'allow'
# import from the live mercurial repo
sys.path.insert(0, r"..")
from mercurial import demandimport

demandimport.enable()
# Load util so that the locale path is set by i18n.setdatapath() before
# calling _().
from mercurial import util

util.datapath
from mercurial import (
    commands,
    encoding,
    extensions,
    help,
    minirst,
    pycompat,
    ui as uimod,
)
from mercurial.i18n import (
    gettext,
    _,
)

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'))
        desc += default and _(b" (default: %s)") % bytes(default) or b""
        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']:
                ui.write(_(b"    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()
    if doc == b'hg.1.gendoc':
        showdoc(ui)
    else:
        showtopic(ui, encoding.strtolocal(sys.argv[1]))