From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 build/util/count_ctors.py |  64 +++++
 build/util/hg.py          | 611 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 675 insertions(+)
 create mode 100644 build/util/count_ctors.py
 create mode 100644 build/util/hg.py

(limited to 'build/util')

diff --git a/build/util/count_ctors.py b/build/util/count_ctors.py
new file mode 100644
index 000000000..6a3a87068
--- /dev/null
+++ b/build/util/count_ctors.py
@@ -0,0 +1,64 @@
+
+#!/usr/bin/python
+import json
+import re
+import subprocess
+import sys
+
+def count_ctors(filename):
+    proc = subprocess.Popen(
+        ['readelf', '-W', '-S', filename], stdout=subprocess.PIPE)
+
+    # Some versions of ld produce both .init_array and .ctors.  So we have
+    # to check for both.
+    n_init_array_ctors = 0
+    have_init_array = False
+    n_ctors_ctors = 0
+    have_ctors = False
+
+    for line in proc.stdout:
+        f = line.split()
+        if len(f) != 11:
+            continue
+        # Don't try to int()-parse the header line for the section summaries.
+        if not re.match("\\[\\d+\\]", f[0]):
+            continue
+        section_name, contents, size, align = f[1], f[2], int(f[5], 16), int(f[10])
+        if section_name == ".ctors" and contents == "PROGBITS":
+            have_ctors = True
+            # Subtract 2 for the uintptr_t(-1) header and the null terminator.
+            n_ctors_ctors = size / align - 2
+        if section_name == ".init_array" and contents == "INIT_ARRAY":
+            have_init_array = True
+            n_init_array_ctors = size / align
+
+    if have_init_array:
+        # Even if we have .ctors, we shouldn't have any constructors in .ctors.
+        # Complain if .ctors does not look how we expect it to.
+        if have_ctors and n_ctors_ctors != 0:
+            print >>sys.stderr, "Unexpected .ctors contents for", filename
+            sys.exit(1)
+        return n_init_array_ctors
+    if have_ctors:
+        return n_ctors_ctors
+
+    # We didn't find anything; somebody switched initialization mechanisms on
+    # us, or the binary is completely busted.  Complain either way.
+    print >>sys.stderr, "Couldn't find .init_array or .ctors in", filename
+    sys.exit(1)
+
+if __name__ == '__main__':
+    for f in sys.argv[1:]:
+        perfherder_data = {
+            "framework": {"name": "build_metrics"},
+            "suites": [{
+                "name": "compiler_metrics",
+                "subtests": [{
+                    "name": "num_constructors",
+                    "value": count_ctors(f),
+                    "alertThreshold": 0.25
+                }]}
+            ]
+        }
+        print "PERFHERDER_DATA: %s" % json.dumps(perfherder_data)
+
diff --git a/build/util/hg.py b/build/util/hg.py
new file mode 100644
index 000000000..c76c8ef03
--- /dev/null
+++ b/build/util/hg.py
@@ -0,0 +1,611 @@
+"""Functions for interacting with hg"""
+import os
+import re
+import subprocess
+from urlparse import urlsplit
+from ConfigParser import RawConfigParser
+
+from util.commands import run_cmd, get_output, remove_path
+from util.retry import retry
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class DefaultShareBase:
+    pass
+DefaultShareBase = DefaultShareBase()
+
+
+class HgUtilError(Exception):
+    pass
+
+
+def _make_absolute(repo):
+    if repo.startswith("file://"):
+        path = repo[len("file://"):]
+        repo = "file://%s" % os.path.abspath(path)
+    elif "://" not in repo:
+        repo = os.path.abspath(repo)
+    return repo
+
+
+def make_hg_url(hgHost, repoPath, protocol='https', revision=None,
+                filename=None):
+    """construct a valid hg url from a base hg url (hg.mozilla.org),
+    repoPath, revision and possible filename"""
+    base = '%s://%s' % (protocol, hgHost)
+    repo = '/'.join(p.strip('/') for p in [base, repoPath])
+    if not filename:
+        if not revision:
+            return repo
+        else:
+            return '/'.join([p.strip('/') for p in [repo, 'rev', revision]])
+    else:
+        assert revision
+        return '/'.join([p.strip('/') for p in [repo, 'raw-file', revision, filename]])
+
+
+def get_repo_name(repo):
+    return repo.rstrip('/').split('/')[-1]
+
+
+def get_repo_path(repo):
+    repo = _make_absolute(repo)
+    if repo.startswith("/"):
+        return repo.lstrip("/")
+    else:
+        return urlsplit(repo).path.lstrip("/")
+
+
+def get_revision(path):
+    """Returns which revision directory `path` currently has checked out."""
+    return get_output(['hg', 'parent', '--template', '{node|short}'], cwd=path)
+
+
+def get_branch(path):
+    return get_output(['hg', 'branch'], cwd=path).strip()
+
+
+def get_branches(path):
+    branches = []
+    for line in get_output(['hg', 'branches', '-c'], cwd=path).splitlines():
+        branches.append(line.split()[0])
+    return branches
+
+
+def is_hg_cset(rev):
+    """Retruns True if passed revision represents a valid HG revision
+    (long or short(er) 40 bit hex)"""
+    try:
+        int(rev, 16)
+        return True
+    except (TypeError, ValueError):
+        return False
+
+
+def hg_ver():
+    """Returns the current version of hg, as a tuple of
+    (major, minor, build)"""
+    ver_string = get_output(['hg', '-q', 'version'])
+    match = re.search("\(version ([0-9.]+)\)", ver_string)
+    if match:
+        bits = match.group(1).split(".")
+        if len(bits) < 3:
+            bits += (0,)
+        ver = tuple(int(b) for b in bits)
+    else:
+        ver = (0, 0, 0)
+    log.debug("Running hg version %s", ver)
+    return ver
+
+
+def purge(dest):
+    """Purge the repository of all untracked and ignored files."""
+    try:
+        run_cmd(['hg', '--config', 'extensions.purge=', 'purge',
+                 '-a', '--all', dest], cwd=dest)
+    except subprocess.CalledProcessError, e:
+        log.debug('purge failed: %s' % e)
+        raise
+
+
+def update(dest, branch=None, revision=None):
+    """Updates working copy `dest` to `branch` or `revision`.  If neither is
+    set then the working copy will be updated to the latest revision on the
+    current branch.  Local changes will be discarded."""
+    # If we have a revision, switch to that
+    if revision is not None:
+        cmd = ['hg', 'update', '-C', '-r', revision]
+        run_cmd(cmd, cwd=dest)
+    else:
+        # Check & switch branch
+        local_branch = get_output(['hg', 'branch'], cwd=dest).strip()
+
+        cmd = ['hg', 'update', '-C']
+
+        # If this is different, checkout the other branch
+        if branch and branch != local_branch:
+            cmd.append(branch)
+
+        run_cmd(cmd, cwd=dest)
+    return get_revision(dest)
+
+
+def clone(repo, dest, branch=None, revision=None, update_dest=True,
+          clone_by_rev=False, mirrors=None, bundles=None):
+    """Clones hg repo and places it at `dest`, replacing whatever else is
+    there.  The working copy will be empty.
+
+    If `revision` is set, only the specified revision and its ancestors will
+    be cloned.
+
+    If `update_dest` is set, then `dest` will be updated to `revision` if
+    set, otherwise to `branch`, otherwise to the head of default.
+
+    If `mirrors` is set, will try and clone from the mirrors before
+    cloning from `repo`.
+
+    If `bundles` is set, will try and download the bundle first and
+    unbundle it. If successful, will pull in new revisions from mirrors or
+    the master repo. If unbundling fails, will fall back to doing a regular
+    clone from mirrors or the master repo.
+
+    Regardless of how the repository ends up being cloned, the 'default' path
+    will point to `repo`.
+    """
+    if os.path.exists(dest):
+        remove_path(dest)
+
+    if bundles:
+        log.info("Attempting to initialize clone with bundles")
+        for bundle in bundles:
+            if os.path.exists(dest):
+                remove_path(dest)
+            init(dest)
+            log.info("Trying to use bundle %s", bundle)
+            try:
+                if not unbundle(bundle, dest):
+                    remove_path(dest)
+                    continue
+                adjust_paths(dest, default=repo)
+                # Now pull / update
+                return pull(repo, dest, update_dest=update_dest,
+                            mirrors=mirrors, revision=revision, branch=branch)
+            except Exception:
+                remove_path(dest)
+                log.exception("Problem unbundling/pulling from %s", bundle)
+                continue
+        else:
+            log.info("Using bundles failed; falling back to clone")
+
+    if mirrors:
+        log.info("Attempting to clone from mirrors")
+        for mirror in mirrors:
+            log.info("Cloning from %s", mirror)
+            try:
+                retval = clone(mirror, dest, branch, revision,
+                               update_dest=update_dest, clone_by_rev=clone_by_rev)
+                adjust_paths(dest, default=repo)
+                return retval
+            except:
+                log.exception("Problem cloning from mirror %s", mirror)
+                continue
+        else:
+            log.info("Pulling from mirrors failed; falling back to %s", repo)
+            # We may have a partial repo here; mercurial() copes with that
+            # We need to make sure our paths are correct though
+            if os.path.exists(os.path.join(dest, '.hg')):
+                adjust_paths(dest, default=repo)
+            return mercurial(repo, dest, branch, revision, autoPurge=True,
+                             update_dest=update_dest, clone_by_rev=clone_by_rev)
+
+    cmd = ['hg', 'clone']
+    if not update_dest:
+        cmd.append('-U')
+
+    if clone_by_rev:
+        if revision:
+            cmd.extend(['-r', revision])
+        elif branch:
+            # hg >= 1.6 supports -b branch for cloning
+            ver = hg_ver()
+            if ver >= (1, 6, 0):
+                cmd.extend(['-b', branch])
+
+    cmd.extend([repo, dest])
+    run_cmd(cmd)
+
+    if update_dest:
+        return update(dest, branch, revision)
+
+
+def common_args(revision=None, branch=None, ssh_username=None, ssh_key=None):
+    """Fill in common hg arguments, encapsulating logic checks that depend on
+       mercurial versions and provided arguments"""
+    args = []
+    if ssh_username or ssh_key:
+        opt = ['-e', 'ssh']
+        if ssh_username:
+            opt[1] += ' -l %s' % ssh_username
+        if ssh_key:
+            opt[1] += ' -i %s' % ssh_key
+        args.extend(opt)
+    if revision:
+        args.extend(['-r', revision])
+    elif branch:
+        if hg_ver() >= (1, 6, 0):
+            args.extend(['-b', branch])
+    return args
+
+
+def pull(repo, dest, update_dest=True, mirrors=None, **kwargs):
+    """Pulls changes from hg repo and places it in `dest`.
+
+    If `update_dest` is set, then `dest` will be updated to `revision` if
+    set, otherwise to `branch`, otherwise to the head of default.
+
+    If `mirrors` is set, will try and pull from the mirrors first before
+    `repo`."""
+
+    if mirrors:
+        for mirror in mirrors:
+            try:
+                return pull(mirror, dest, update_dest=update_dest, **kwargs)
+            except:
+                log.exception("Problem pulling from mirror %s", mirror)
+                continue
+        else:
+            log.info("Pulling from mirrors failed; falling back to %s", repo)
+
+    # Convert repo to an absolute path if it's a local repository
+    repo = _make_absolute(repo)
+    cmd = ['hg', 'pull']
+    # Don't pass -r to "hg pull", except when it's a valid HG revision.
+    # Pulling using tag names is dangerous: it uses the local .hgtags, so if
+    # the tag has moved on the remote side you won't pull the new revision the
+    # remote tag refers to.
+    pull_kwargs = kwargs.copy()
+    if 'revision' in pull_kwargs and \
+       not is_hg_cset(pull_kwargs['revision']):
+        del pull_kwargs['revision']
+
+    cmd.extend(common_args(**pull_kwargs))
+
+    cmd.append(repo)
+    run_cmd(cmd, cwd=dest)
+
+    if update_dest:
+        branch = None
+        if 'branch' in kwargs and kwargs['branch']:
+            branch = kwargs['branch']
+        revision = None
+        if 'revision' in kwargs and kwargs['revision']:
+            revision = kwargs['revision']
+        return update(dest, branch=branch, revision=revision)
+
+# Defines the places of attributes in the tuples returned by `out'
+REVISION, BRANCH = 0, 1
+
+
+def out(src, remote, **kwargs):
+    """Check for outgoing changesets present in a repo"""
+    cmd = ['hg', '-q', 'out', '--template', '{node} {branches}\n']
+    cmd.extend(common_args(**kwargs))
+    cmd.append(remote)
+    if os.path.exists(src):
+        try:
+            revs = []
+            for line in get_output(cmd, cwd=src).rstrip().split("\n"):
+                try:
+                    rev, branch = line.split()
+                # Mercurial displays no branch at all if the revision is on
+                # "default"
+                except ValueError:
+                    rev = line.rstrip()
+                    branch = "default"
+                revs.append((rev, branch))
+            return revs
+        except subprocess.CalledProcessError, inst:
+            # In some situations, some versions of Mercurial return "1"
+            # if no changes are found, so we need to ignore this return code
+            if inst.returncode == 1:
+                return []
+            raise
+
+
+def push(src, remote, push_new_branches=True, force=False, **kwargs):
+    cmd = ['hg', 'push']
+    cmd.extend(common_args(**kwargs))
+    if force:
+        cmd.append('-f')
+    if push_new_branches:
+        cmd.append('--new-branch')
+    cmd.append(remote)
+    run_cmd(cmd, cwd=src)
+
+
+def mercurial(repo, dest, branch=None, revision=None, update_dest=True,
+              shareBase=DefaultShareBase, allowUnsharedLocalClones=False,
+              clone_by_rev=False, mirrors=None, bundles=None, autoPurge=False):
+    """Makes sure that `dest` is has `revision` or `branch` checked out from
+    `repo`.
+
+    Do what it takes to make that happen, including possibly clobbering
+    dest.
+
+    If allowUnsharedLocalClones is True and we're trying to use the share
+    extension but fail, then we will be able to clone from the shared repo to
+    our destination.  If this is False, the default, then if we don't have the
+    share extension we will just clone from the remote repository.
+
+    If `clone_by_rev` is True, use 'hg clone -r <rev>' instead of 'hg clone'.
+    This is slower, but useful when cloning repos with lots of heads.
+
+    If `mirrors` is set, will try and use the mirrors before `repo`.
+
+    If `bundles` is set, will try and download the bundle first and
+    unbundle it instead of doing a full clone. If successful, will pull in
+    new revisions from mirrors or the master repo. If unbundling fails, will
+    fall back to doing a regular clone from mirrors or the master repo.
+    """
+    dest = os.path.abspath(dest)
+    if shareBase is DefaultShareBase:
+        shareBase = os.environ.get("HG_SHARE_BASE_DIR", None)
+
+    log.info("Reporting hg version in use")
+    cmd = ['hg', '-q', 'version']
+    run_cmd(cmd, cwd='.')
+
+    if shareBase:
+        # Check that 'hg share' works
+        try:
+            log.info("Checking if share extension works")
+            output = get_output(['hg', 'help', 'share'], dont_log=True)
+            if 'no commands defined' in output:
+                # Share extension is enabled, but not functional
+                log.info("Disabling sharing since share extension doesn't seem to work (1)")
+                shareBase = None
+            elif 'unknown command' in output:
+                # Share extension is disabled
+                log.info("Disabling sharing since share extension doesn't seem to work (2)")
+                shareBase = None
+        except subprocess.CalledProcessError:
+            # The command failed, so disable sharing
+            log.info("Disabling sharing since share extension doesn't seem to work (3)")
+            shareBase = None
+
+    # Check that our default path is correct
+    if os.path.exists(os.path.join(dest, '.hg')):
+        hgpath = path(dest, "default")
+
+        # Make sure that our default path is correct
+        if hgpath != _make_absolute(repo):
+            log.info("hg path isn't correct (%s should be %s); clobbering",
+                     hgpath, _make_absolute(repo))
+            remove_path(dest)
+
+    # If the working directory already exists and isn't using share we update
+    # the working directory directly from the repo, ignoring the sharing
+    # settings
+    if os.path.exists(dest):
+        if not os.path.exists(os.path.join(dest, ".hg")):
+            log.warning("%s doesn't appear to be a valid hg directory; clobbering", dest)
+            remove_path(dest)
+        elif not os.path.exists(os.path.join(dest, ".hg", "sharedpath")):
+            try:
+                if autoPurge:
+                    purge(dest)
+                return pull(repo, dest, update_dest=update_dest, branch=branch,
+                            revision=revision,
+                            mirrors=mirrors)
+            except subprocess.CalledProcessError:
+                log.warning("Error pulling changes into %s from %s; clobbering", dest, repo)
+                log.debug("Exception:", exc_info=True)
+                remove_path(dest)
+
+    # If that fails for any reason, and sharing is requested, we'll try to
+    # update the shared repository, and then update the working directory from
+    # that.
+    if shareBase:
+        sharedRepo = os.path.join(shareBase, get_repo_path(repo))
+        dest_sharedPath = os.path.join(dest, '.hg', 'sharedpath')
+
+        if os.path.exists(sharedRepo):
+            hgpath = path(sharedRepo, "default")
+
+            # Make sure that our default path is correct
+            if hgpath != _make_absolute(repo):
+                log.info("hg path isn't correct (%s should be %s); clobbering",
+                         hgpath, _make_absolute(repo))
+                # we need to clobber both the shared checkout and the dest,
+                # since hgrc needs to be in both places
+                remove_path(sharedRepo)
+                remove_path(dest)
+
+        if os.path.exists(dest_sharedPath):
+            # Make sure that the sharedpath points to sharedRepo
+            dest_sharedPath_data = os.path.normpath(
+                open(dest_sharedPath).read())
+            norm_sharedRepo = os.path.normpath(os.path.join(sharedRepo, '.hg'))
+            if dest_sharedPath_data != norm_sharedRepo:
+                # Clobber!
+                log.info("We're currently shared from %s, but are being requested to pull from %s (%s); clobbering",
+                         dest_sharedPath_data, repo, norm_sharedRepo)
+                remove_path(dest)
+
+        try:
+            log.info("Updating shared repo")
+            mercurial(repo, sharedRepo, branch=branch, revision=revision,
+                      update_dest=False, shareBase=None, clone_by_rev=clone_by_rev,
+                      mirrors=mirrors, bundles=bundles, autoPurge=False)
+            if os.path.exists(dest):
+                if autoPurge:
+                    purge(dest)
+                return update(dest, branch=branch, revision=revision)
+
+            try:
+                log.info("Trying to share %s to %s", sharedRepo, dest)
+                return share(sharedRepo, dest, branch=branch, revision=revision)
+            except subprocess.CalledProcessError:
+                if not allowUnsharedLocalClones:
+                    # Re-raise the exception so it gets caught below.
+                    # We'll then clobber dest, and clone from original repo
+                    raise
+
+                log.warning("Error calling hg share from %s to %s;"
+                            "falling back to normal clone from shared repo",
+                            sharedRepo, dest)
+                # Do a full local clone first, and then update to the
+                # revision we want
+                # This lets us use hardlinks for the local clone if the OS
+                # supports it
+                clone(sharedRepo, dest, update_dest=False,
+                      mirrors=mirrors, bundles=bundles)
+                return update(dest, branch=branch, revision=revision)
+        except subprocess.CalledProcessError:
+            log.warning(
+                "Error updating %s from sharedRepo (%s): ", dest, sharedRepo)
+            log.debug("Exception:", exc_info=True)
+            remove_path(dest)
+    # end if shareBase
+
+    if not os.path.exists(os.path.dirname(dest)):
+        os.makedirs(os.path.dirname(dest))
+
+    # Share isn't available or has failed, clone directly from the source
+    return clone(repo, dest, branch, revision,
+                 update_dest=update_dest, mirrors=mirrors,
+                 bundles=bundles, clone_by_rev=clone_by_rev)
+
+
+def apply_and_push(localrepo, remote, changer, max_attempts=10,
+                   ssh_username=None, ssh_key=None, force=False):
+    """This function calls `changer' to make changes to the repo, and tries
+       its hardest to get them to the origin repo. `changer' must be a
+       callable object that receives two arguments: the directory of the local
+       repository, and the attempt number. This function will push ALL
+       changesets missing from remote."""
+    assert callable(changer)
+    branch = get_branch(localrepo)
+    changer(localrepo, 1)
+    for n in range(1, max_attempts + 1):
+        new_revs = []
+        try:
+            new_revs = out(src=localrepo, remote=remote,
+                           ssh_username=ssh_username,
+                           ssh_key=ssh_key)
+            if len(new_revs) < 1:
+                raise HgUtilError("No revs to push")
+            push(src=localrepo, remote=remote, ssh_username=ssh_username,
+                 ssh_key=ssh_key, force=force)
+            return
+        except subprocess.CalledProcessError, e:
+            log.debug("Hit error when trying to push: %s" % str(e))
+            if n == max_attempts:
+                log.debug("Tried %d times, giving up" % max_attempts)
+                for r in reversed(new_revs):
+                    run_cmd(['hg', '--config', 'extensions.mq=', 'strip', '-n',
+                             r[REVISION]], cwd=localrepo)
+                raise HgUtilError("Failed to push")
+            pull(remote, localrepo, update_dest=False,
+                 ssh_username=ssh_username, ssh_key=ssh_key)
+            # After we successfully rebase or strip away heads the push is
+            # is attempted again at the start of the loop
+            try:
+                run_cmd(['hg', '--config', 'ui.merge=internal:merge',
+                         'rebase'], cwd=localrepo)
+            except subprocess.CalledProcessError, e:
+                log.debug("Failed to rebase: %s" % str(e))
+                update(localrepo, branch=branch)
+                for r in reversed(new_revs):
+                    run_cmd(['hg', '--config', 'extensions.mq=', 'strip', '-n',
+                             r[REVISION]], cwd=localrepo)
+                changer(localrepo, n + 1)
+
+
+def share(source, dest, branch=None, revision=None):
+    """Creates a new working directory in "dest" that shares history with
+       "source" using Mercurial's share extension"""
+    run_cmd(['hg', 'share', '-U', source, dest])
+    return update(dest, branch=branch, revision=revision)
+
+
+def cleanOutgoingRevs(reponame, remote, username, sshKey):
+    outgoingRevs = retry(out, kwargs=dict(src=reponame, remote=remote,
+                                          ssh_username=username,
+                                          ssh_key=sshKey))
+    for r in reversed(outgoingRevs):
+        run_cmd(['hg', '--config', 'extensions.mq=', 'strip', '-n',
+                 r[REVISION]], cwd=reponame)
+
+
+def path(src, name='default'):
+    """Returns the remote path associated with "name" """
+    try:
+        return get_output(['hg', 'path', name], cwd=src).strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def init(dest):
+    """Initializes an empty repo in `dest`"""
+    run_cmd(['hg', 'init', dest])
+
+
+def unbundle(bundle, dest):
+    """Unbundles the bundle located at `bundle` into `dest`.
+
+    `bundle` can be a local file or remote url."""
+    try:
+        get_output(['hg', 'unbundle', bundle], cwd=dest, include_stderr=True)
+        return True
+    except subprocess.CalledProcessError:
+        return False
+
+
+def adjust_paths(dest, **paths):
+    """Adjusts paths in `dest`/.hg/hgrc so that names in `paths` are set to
+    paths[name].
+
+    Note that any comments in the hgrc will be lost if changes are made to the
+    file."""
+    hgrc = os.path.join(dest, '.hg', 'hgrc')
+    config = RawConfigParser()
+    config.read(hgrc)
+
+    if not config.has_section('paths'):
+        config.add_section('paths')
+
+    changed = False
+    for path_name, path_value in paths.items():
+        if (not config.has_option('paths', path_name) or
+                config.get('paths', path_name) != path_value):
+            changed = True
+            config.set('paths', path_name, path_value)
+
+    if changed:
+        config.write(open(hgrc, 'w'))
+
+
+def commit(dest, msg, user=None):
+    cmd = ['hg', 'commit', '-m', msg]
+    if user:
+        cmd.extend(['-u', user])
+    run_cmd(cmd, cwd=dest)
+    return get_revision(dest)
+
+
+def tag(dest, tags, user=None, msg=None, rev=None, force=None):
+    cmd = ['hg', 'tag']
+    if user:
+        cmd.extend(['-u', user])
+    if msg:
+        cmd.extend(['-m', msg])
+    if rev:
+        cmd.extend(['-r', rev])
+    if force:
+        cmd.append('-f')
+    cmd.extend(tags)
+    run_cmd(cmd, cwd=dest)
+    return get_revision(dest)
-- 
cgit v1.2.3