hgext/bookflow.py

run-tests: alias hg to hg.exe on Windows

To enable legacy stdio mode on Windows, hg.exe needs to be updated.  But before
that, we actually have to use it when running the tests.  I *think* what was
happening before was when MSYS invoked `hg`, it looked at the shbang line and
ran python.exe found there.  The test harness must be updating $PATH to include
the python used to launch it, and therefore it ran py3.  As a side note, this
also fixed `py -3 run-tests.py` (without --local), which complained about the
space in the shbang line before this.

This should also help in WSL, because the explicit '.exe' is needed to invoke a
Windows app instead of invoking the Linux app.

I have no idea why this change capitalizes Lib in the tests, as it was
previously lowercase for both py2 and py3.

"""implements bookmark-based branching (EXPERIMENTAL)

 - Disables creation of new branches (config: enable_branches=False).
 - Requires an active bookmark on commit (config: require_bookmark=True).
 - Doesn't move the active bookmark on update, only on commit.
 - Requires '--rev' for moving an existing bookmark.
 - Protects special bookmarks (config: protect=@).

 flow related commands

    :hg book NAME: create a new bookmark
    :hg book NAME -r REV: move bookmark to revision (fast-forward)
    :hg up|co NAME: switch to bookmark
    :hg push -B .: push active bookmark
"""
from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
    bookmarks,
    commands,
    error,
    extensions,
    registrar,
)

MY_NAME = 'bookflow'

configtable = {}
configitem = registrar.configitem(configtable)

configitem(MY_NAME, 'protect', ['@'])
configitem(MY_NAME, 'require-bookmark', True)
configitem(MY_NAME, 'enable-branches', False)

cmdtable = {}
command = registrar.command(cmdtable)

def commit_hook(ui, repo, **kwargs):
    active = repo._bookmarks.active
    if active:
        if active in ui.configlist(MY_NAME, 'protect'):
            raise error.Abort(
                _('cannot commit, bookmark {} is protected').format(active))
        if not cwd_at_bookmark(repo, active):
            raise error.Abort(
       _('cannot commit, working directory out of sync with active bookmark'),
                hint=_("run 'hg up {}'").format(active))
    elif ui.configbool(MY_NAME, 'require-bookmark', True):
        raise error.Abort(_('cannot commit without an active bookmark'))
    return 0

def bookmarks_update(orig, repo, parents, node):
    if len(parents) == 2:
        # called during commit
        return orig(repo, parents, node)
    else:
        # called during update
        return False

def bookmarks_addbookmarks(
        orig, repo, tr, names, rev=None, force=False, inactive=False):
    if not rev:
        marks = repo._bookmarks
        for name in names:
            if name in marks:
                raise error.Abort(
                    _("bookmark {} already exists, to move use the --rev option"
                    ).format(name))
    return orig(repo, tr, names, rev, force, inactive)

def commands_commit(orig, ui, repo, *args, **opts):
    commit_hook(ui, repo)
    return orig(ui, repo, *args, **opts)

def commands_pull(orig, ui, repo, *args, **opts):
    rc = orig(ui, repo, *args, **opts)
    active = repo._bookmarks.active
    if active and not cwd_at_bookmark(repo, active):
        ui.warn(_(
            "working directory out of sync with active bookmark, run 'hg up {}'"
        ).format(active))
    return rc

def commands_branch(orig, ui, repo, label=None, **opts):
    if label and not opts.get(r'clean') and not opts.get(r'rev'):
        raise error.Abort(
         _("creating named branches is disabled and you should use bookmarks"),
            hint="see 'hg help bookflow'")
    return orig(ui, repo, label, **opts)

def cwd_at_bookmark(repo, mark):
    mark_id = repo._bookmarks[mark]
    cur_id = repo.lookup('.')
    return cur_id == mark_id

def uisetup(ui):
    extensions.wrapfunction(bookmarks, 'update', bookmarks_update)
    extensions.wrapfunction(bookmarks, 'addbookmarks', bookmarks_addbookmarks)
    extensions.wrapcommand(commands.table, 'commit', commands_commit)
    extensions.wrapcommand(commands.table, 'pull', commands_pull)
    if not ui.configbool(MY_NAME, 'enable-branches'):
        extensions.wrapcommand(commands.table, 'branch', commands_branch)