Mercurial > hg
view doc/check-seclevel.py @ 50336:cf4d2f31660d stable
chg: populate CHGHG if not set
Normally, chg determines which `hg` executable to use by first consulting the
`$CHGHG` and `$HG` environment variables, and if neither are present defaults
to the `hg` found in the user's `$PATH`. If built with the `HGPATHREL` compiler
flag, chg will instead assume that there exists an `hg` executable in the same
directory as the `chg` binary and attempt to use that.
This can cause problems in situations where there are multiple actively-used
Mercurial installations on the same system. When a `chg` client connects to a
running command server, the server process performs some basic validation to
determine whether a new command server needs to be spawned. These checks include
things like checking certain "sensitive" environment variables and config
sections, as well as checking whether the mtime of the extensions, hg's
`__version__.py` module, and the Python interpreter have changed.
Crucially, the command server doesn't explicitly check whether the executable it
is running from matches the executable that the `chg` client would have
otherwise invoked had there been no existing command server process. Without
`HGPATHREL`, this still gets implicitly checked during the validation step,
because the only way to specify an alternate hg executable (apart from `$PATH`)
is via the `$CHGHG` and `$HG` environment variables, both of which are checked.
With `HGPATHREL`, however, the command server has no way of knowing which hg
executable the client would have run. This means that a client located at
`/version_B/bin/chg` will happily connect to a command server running
`/version_A/bin/hg` instead of `/version_B/bin/hg` as expected. A simple
solution is to have the client set `$CHGHG` itself, which then allows the
command server's environment validation to work as intended.
I have tested this manually using two locally built hg installations and it
seems to work with no ill effects. That said, I'm not sure how to write an
automated test for this since the `chg` available to the tests isn't even built
with the `HGPATHREL` compiler flag to begin with.
author | Arun Kulshreshtha <akulshreshtha@janestreet.com> |
---|---|
date | Mon, 27 Mar 2023 17:30:14 -0400 |
parents | 98e7be1ed6c5 |
children |
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#!/usr/bin/env python3 # # checkseclevel - checking section title levels in each online help document import optparse import os import sys # import from the live mercurial repo os.environ['HGMODULEPOLICY'] = 'py' sys.path.insert(0, os.path.abspath("..")) from mercurial import demandimport demandimport.enable() from mercurial import ( commands, extensions, help, minirst, ui as uimod, ) table = commands.table helptable = help.helptable level2mark = [b'"', b'=', b'-', b'.', b'#'] reservedmarks = [b'"'] mark2level = {} for m, l in zip(level2mark, range(len(level2mark))): if m not in reservedmarks: mark2level[m] = l initlevel_topic = 0 initlevel_cmd = 1 initlevel_ext = 1 initlevel_ext_cmd = 3 def showavailables(ui, initlevel): avail = ' available marks and order of them in this help: %s\n' % ( ', '.join(['%r' % (m * 4) for m in level2mark[initlevel + 1 :]]) ) ui.warn(avail.encode('utf-8')) def checkseclevel(ui, doc, name, initlevel): ui.notenoi18n(('checking "%s"\n' % name).encode('utf-8')) if not isinstance(doc, bytes): doc = doc.encode('utf-8') blocks, pruned = minirst.parse(doc, 0, ['verbose']) errorcnt = 0 curlevel = initlevel for block in blocks: if block[b'type'] != b'section': continue mark = block[b'underline'] title = block[b'lines'][0] if (mark not in mark2level) or (mark2level[mark] <= initlevel): ui.warn( ( 'invalid section mark %r for "%s" of %s\n' % (mark * 4, title, name) ).encode('utf-8') ) showavailables(ui, initlevel) errorcnt += 1 continue nextlevel = mark2level[mark] if curlevel < nextlevel and curlevel + 1 != nextlevel: ui.warnnoi18n( ('gap of section level at "%s" of %s\n' % (title, name)).encode( 'utf-8' ) ) showavailables(ui, initlevel) errorcnt += 1 continue ui.notenoi18n( ( 'appropriate section level for "%s %s"\n' % (mark * (nextlevel * 2), title) ).encode('utf-8') ) curlevel = nextlevel return errorcnt def checkcmdtable(ui, cmdtable, namefmt, initlevel): errorcnt = 0 for k, entry in cmdtable.items(): name = k.split(b"|")[0].lstrip(b"^") if not entry[0].__doc__: ui.notenoi18n( ( 'skip checking %s: no help document\n' % (namefmt % name) ).encode('utf-8') ) continue errorcnt += checkseclevel( ui, entry[0].__doc__, namefmt % name, initlevel ) return errorcnt def checkhghelps(ui): errorcnt = 0 for h in helptable: names, sec, doc = h[0:3] if callable(doc): doc = doc(ui) errorcnt += checkseclevel( ui, doc, '%s help topic' % names[0], initlevel_topic ) errorcnt += checkcmdtable(ui, table, '%s command', initlevel_cmd) for name in sorted( list(extensions.enabled()) + list(extensions.disabled()) ): mod = extensions.load(ui, name, None) if not mod.__doc__: ui.notenoi18n( ( 'skip checking %s extension: no help document\n' % name ).encode('utf-8') ) continue errorcnt += checkseclevel( ui, mod.__doc__, '%s extension' % name, initlevel_ext ) cmdtable = getattr(mod, 'cmdtable', None) if cmdtable: errorcnt += checkcmdtable( ui, cmdtable, '%%s command of %s extension' % name, initlevel_ext_cmd, ) return errorcnt def checkfile(ui, filename, initlevel): if filename == '-': filename = 'stdin' doc = sys.stdin.read() else: with open(filename) as fp: doc = fp.read() ui.notenoi18n( ( 'checking input from %s with initlevel %d\n' % (filename, initlevel) ).encode('utf-8') ) return checkseclevel(ui, doc, 'input from %s' % filename, initlevel) def main(): optparser = optparse.OptionParser( """%prog [options] This checks all help documents of Mercurial (topics, commands, extensions and commands of them), if no file is specified by --file option. """ ) optparser.add_option( "-v", "--verbose", help="enable additional output", action="store_true" ) optparser.add_option( "-d", "--debug", help="debug mode", action="store_true" ) optparser.add_option( "-f", "--file", help="filename to read in (or '-' for stdin)", action="store", default="", ) optparser.add_option( "-t", "--topic", help="parse file as help topic", action="store_const", dest="initlevel", const=0, ) optparser.add_option( "-c", "--command", help="parse file as help of core command", action="store_const", dest="initlevel", const=1, ) optparser.add_option( "-e", "--extension", help="parse file as help of extension", action="store_const", dest="initlevel", const=1, ) optparser.add_option( "-C", "--extension-command", help="parse file as help of extension command", action="store_const", dest="initlevel", const=3, ) optparser.add_option( "-l", "--initlevel", help="set initial section level manually", action="store", type="int", default=0, ) (options, args) = optparser.parse_args() ui = uimod.ui.load() ui.setconfig(b'ui', b'verbose', options.verbose, b'--verbose') ui.setconfig(b'ui', b'debug', options.debug, b'--debug') if options.file: if checkfile(ui, options.file, options.initlevel): sys.exit(1) else: if checkhghelps(ui): sys.exit(1) if __name__ == "__main__": main()