add hg and python

1 files changed, 367 insertions, 0 deletions

diff --git a/sys/lib/python/mercurial/hg.py b/sys/lib/python/mercurial/hg.py
new file mode 100644
index 000000000..504bc1256
--- /dev/null
+++ b/sys/lib/python/mercurial/hg.py
@@ -0,0 +1,367 @@
+# hg.py - repository classes for mercurial
+#
+# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
+# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+from i18n import _
+from lock import release
+import localrepo, bundlerepo, httprepo, sshrepo, statichttprepo
+import lock, util, extensions, error
+import merge as _merge
+import verify as _verify
+import errno, os, shutil
+
+def _local(path):
+    return (os.path.isfile(util.drop_scheme('file', path)) and
+            bundlerepo or localrepo)
+
+def parseurl(url, revs=[]):
+    '''parse url#branch, returning url, branch + revs'''
+
+    if '#' not in url:
+        return url, (revs or None), revs and revs[-1] or None
+
+    url, branch = url.split('#', 1)
+    checkout = revs and revs[-1] or branch
+    return url, (revs or []) + [branch], checkout
+
+schemes = {
+    'bundle': bundlerepo,
+    'file': _local,
+    'http': httprepo,
+    'https': httprepo,
+    'ssh': sshrepo,
+    'static-http': statichttprepo,
+}
+
+def _lookup(path):
+    scheme = 'file'
+    if path:
+        c = path.find(':')
+        if c > 0:
+            scheme = path[:c]
+    thing = schemes.get(scheme) or schemes['file']
+    try:
+        return thing(path)
+    except TypeError:
+        return thing
+
+def islocal(repo):
+    '''return true if repo or path is local'''
+    if isinstance(repo, str):
+        try:
+            return _lookup(repo).islocal(repo)
+        except AttributeError:
+            return False
+    return repo.local()
+
+def repository(ui, path='', create=False):
+    """return a repository object for the specified path"""
+    repo = _lookup(path).instance(ui, path, create)
+    ui = getattr(repo, "ui", ui)
+    for name, module in extensions.extensions():
+        hook = getattr(module, 'reposetup', None)
+        if hook:
+            hook(ui, repo)
+    return repo
+
+def defaultdest(source):
+    '''return default destination of clone if none is given'''
+    return os.path.basename(os.path.normpath(source))
+
+def localpath(path):
+    if path.startswith('file://localhost/'):
+        return path[16:]
+    if path.startswith('file://'):
+        return path[7:]
+    if path.startswith('file:'):
+        return path[5:]
+    return path
+
+def share(ui, source, dest=None, update=True):
+    '''create a shared repository'''
+
+    if not islocal(source):
+        raise util.Abort(_('can only share local repositories'))
+
+    if not dest:
+        dest = os.path.basename(source)
+    else:
+        dest = ui.expandpath(dest)
+
+    if isinstance(source, str):
+        origsource = ui.expandpath(source)
+        source, rev, checkout = parseurl(origsource, '')
+        srcrepo = repository(ui, source)
+    else:
+        srcrepo = source
+        origsource = source = srcrepo.url()
+        checkout = None
+
+    sharedpath = srcrepo.sharedpath # if our source is already sharing
+
+    root = os.path.realpath(dest)
+    roothg = os.path.join(root, '.hg')
+
+    if os.path.exists(roothg):
+        raise util.Abort(_('destination already exists'))
+
+    if not os.path.isdir(root):
+        os.mkdir(root)
+    os.mkdir(roothg)
+
+    requirements = ''
+    try:
+        requirements = srcrepo.opener('requires').read()
+    except IOError, inst:
+        if inst.errno != errno.ENOENT:
+            raise
+
+    requirements += 'shared\n'
+    file(os.path.join(roothg, 'requires'), 'w').write(requirements)
+    file(os.path.join(roothg, 'sharedpath'), 'w').write(sharedpath)
+
+    default = srcrepo.ui.config('paths', 'default')
+    if default:
+        f = file(os.path.join(roothg, 'hgrc'), 'w')
+        f.write('[paths]\ndefault = %s\n' % default)
+        f.close()
+
+    r = repository(ui, root)
+
+    if update:
+        r.ui.status(_("updating working directory\n"))
+        if update is not True:
+            checkout = update
+        for test in (checkout, 'default', 'tip'):
+            try:
+                uprev = r.lookup(test)
+                break
+            except LookupError:
+                continue
+        _update(r, uprev)
+
+def clone(ui, source, dest=None, pull=False, rev=None, update=True,
+          stream=False):
+    """Make a copy of an existing repository.
+
+    Create a copy of an existing repository in a new directory.  The
+    source and destination are URLs, as passed to the repository
+    function.  Returns a pair of repository objects, the source and
+    newly created destination.
+
+    The location of the source is added to the new repository's
+    .hg/hgrc file, as the default to be used for future pulls and
+    pushes.
+
+    If an exception is raised, the partly cloned/updated destination
+    repository will be deleted.
+
+    Arguments:
+
+    source: repository object or URL
+
+    dest: URL of destination repository to create (defaults to base
+    name of source repository)
+
+    pull: always pull from source repository, even in local case
+
+    stream: stream raw data uncompressed from repository (fast over
+    LAN, slow over WAN)
+
+    rev: revision to clone up to (implies pull=True)
+
+    update: update working directory after clone completes, if
+    destination is local repository (True means update to default rev,
+    anything else is treated as a revision)
+    """
+
+    if isinstance(source, str):
+        origsource = ui.expandpath(source)
+        source, rev, checkout = parseurl(origsource, rev)
+        src_repo = repository(ui, source)
+    else:
+        src_repo = source
+        origsource = source = src_repo.url()
+        checkout = rev and rev[-1] or None
+
+    if dest is None:
+        dest = defaultdest(source)
+        ui.status(_("destination directory: %s\n") % dest)
+    else:
+        dest = ui.expandpath(dest)
+
+    dest = localpath(dest)
+    source = localpath(source)
+
+    if os.path.exists(dest):
+        if not os.path.isdir(dest):
+            raise util.Abort(_("destination '%s' already exists") % dest)
+        elif os.listdir(dest):
+            raise util.Abort(_("destination '%s' is not empty") % dest)
+
+    class DirCleanup(object):
+        def __init__(self, dir_):
+            self.rmtree = shutil.rmtree
+            self.dir_ = dir_
+        def close(self):
+            self.dir_ = None
+        def cleanup(self):
+            if self.dir_:
+                self.rmtree(self.dir_, True)
+
+    src_lock = dest_lock = dir_cleanup = None
+    try:
+        if islocal(dest):
+            dir_cleanup = DirCleanup(dest)
+
+        abspath = origsource
+        copy = False
+        if src_repo.cancopy() and islocal(dest):
+            abspath = os.path.abspath(util.drop_scheme('file', origsource))
+            copy = not pull and not rev
+
+        if copy:
+            try:
+                # we use a lock here because if we race with commit, we
+                # can end up with extra data in the cloned revlogs that's
+                # not pointed to by changesets, thus causing verify to
+                # fail
+                src_lock = src_repo.lock(wait=False)
+            except error.LockError:
+                copy = False
+
+        if copy:
+            src_repo.hook('preoutgoing', throw=True, source='clone')
+            hgdir = os.path.realpath(os.path.join(dest, ".hg"))
+            if not os.path.exists(dest):
+                os.mkdir(dest)
+            else:
+                # only clean up directories we create ourselves
+                dir_cleanup.dir_ = hgdir
+            try:
+                dest_path = hgdir
+                os.mkdir(dest_path)
+            except OSError, inst:
+                if inst.errno == errno.EEXIST:
+                    dir_cleanup.close()
+                    raise util.Abort(_("destination '%s' already exists")
+                                     % dest)
+                raise
+
+            for f in src_repo.store.copylist():
+                src = os.path.join(src_repo.path, f)
+                dst = os.path.join(dest_path, f)
+                dstbase = os.path.dirname(dst)
+                if dstbase and not os.path.exists(dstbase):
+                    os.mkdir(dstbase)
+                if os.path.exists(src):
+                    if dst.endswith('data'):
+                        # lock to avoid premature writing to the target
+                        dest_lock = lock.lock(os.path.join(dstbase, "lock"))
+                    util.copyfiles(src, dst)
+
+            # we need to re-init the repo after manually copying the data
+            # into it
+            dest_repo = repository(ui, dest)
+            src_repo.hook('outgoing', source='clone', node='0'*40)
+        else:
+            try:
+                dest_repo = repository(ui, dest, create=True)
+            except OSError, inst:
+                if inst.errno == errno.EEXIST:
+                    dir_cleanup.close()
+                    raise util.Abort(_("destination '%s' already exists")
+                                     % dest)
+                raise
+
+            revs = None
+            if rev:
+                if 'lookup' not in src_repo.capabilities:
+                    raise util.Abort(_("src repository does not support "
+                                       "revision lookup and so doesn't "
+                                       "support clone by revision"))
+                revs = [src_repo.lookup(r) for r in rev]
+                checkout = revs[0]
+            if dest_repo.local():
+                dest_repo.clone(src_repo, heads=revs, stream=stream)
+            elif src_repo.local():
+                src_repo.push(dest_repo, revs=revs)
+            else:
+                raise util.Abort(_("clone from remote to remote not supported"))
+
+        if dir_cleanup:
+            dir_cleanup.close()
+
+        if dest_repo.local():
+            fp = dest_repo.opener("hgrc", "w", text=True)
+            fp.write("[paths]\n")
+            fp.write("default = %s\n" % abspath)
+            fp.close()
+
+            dest_repo.ui.setconfig('paths', 'default', abspath)
+
+            if update:
+                dest_repo.ui.status(_("updating working directory\n"))
+                if update is not True:
+                    checkout = update
+                for test in (checkout, 'default', 'tip'):
+                    try:
+                        uprev = dest_repo.lookup(test)
+                        break
+                    except:
+                        continue
+                _update(dest_repo, uprev)
+
+        return src_repo, dest_repo
+    finally:
+        release(src_lock, dest_lock)
+        if dir_cleanup is not None:
+            dir_cleanup.cleanup()
+
+def _showstats(repo, stats):
+    stats = ((stats[0], _("updated")),
+             (stats[1], _("merged")),
+             (stats[2], _("removed")),
+             (stats[3], _("unresolved")))
+    note = ", ".join([_("%d files %s") % s for s in stats])
+    repo.ui.status("%s\n" % note)
+
+def update(repo, node):
+    """update the working directory to node, merging linear changes"""
+    stats = _merge.update(repo, node, False, False, None)
+    _showstats(repo, stats)
+    if stats[3]:
+        repo.ui.status(_("use 'hg resolve' to retry unresolved file merges\n"))
+    return stats[3] > 0
+
+# naming conflict in clone()
+_update = update
+
+def clean(repo, node, show_stats=True):
+    """forcibly switch the working directory to node, clobbering changes"""
+    stats = _merge.update(repo, node, False, True, None)
+    if show_stats: _showstats(repo, stats)
+    return stats[3] > 0
+
+def merge(repo, node, force=None, remind=True):
+    """branch merge with node, resolving changes"""
+    stats = _merge.update(repo, node, True, force, False)
+    _showstats(repo, stats)
+    if stats[3]:
+        repo.ui.status(_("use 'hg resolve' to retry unresolved file merges "
+                         "or 'hg up --clean' to abandon\n"))
+    elif remind:
+        repo.ui.status(_("(branch merge, don't forget to commit)\n"))
+    return stats[3] > 0
+
+def revert(repo, node, choose):
+    """revert changes to revision in node without updating dirstate"""
+    return _merge.update(repo, node, False, True, choose)[3] > 0
+
+def verify(repo):
+    """verify the consistency of a repository"""
+    return _verify.verify(repo)