init: use the remote default manifest branch

Instead of hardcoding "master" as our default, use the remote server's
default branch instead.  For most people, this should be the same as
"master" already.  For projects moving to "main", it means we'll use
the new name automatically rather than forcing people to use -b main.

For repositories that never set up a default HEAD, we should still use
the historical "master" default.

Bug: https://crbug.com/gerrit/13339
Change-Id: I4117c81a760c9495f98dbb1111a3e6c127f45eba
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/280799
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Tested-by: Mike Frysinger <vapier@google.com>
This commit is contained in:
Mike Frysinger 2020-09-06 15:51:21 -04:00
parent 0501b29e7a
commit 50a81de2bc
2 changed files with 36 additions and 11 deletions

View File

@ -2311,6 +2311,27 @@ class Project(object):
# Enable the extension!
self.config.SetString('extensions.%s' % (key,), value)
def ResolveRemoteHead(self, name=None):
"""Find out what the default branch (HEAD) points to.
Normally this points to refs/heads/master, but projects are moving to main.
Support whatever the server uses rather than hardcoding "master" ourselves.
"""
if name is None:
name = self.remote.name
# The output will look like (NB: tabs are separators):
# ref: refs/heads/master HEAD
# 5f6803b100bb3cd0f534e96e88c91373e8ed1c44 HEAD
output = self.bare_git.ls_remote('-q', '--symref', '--exit-code', name, 'HEAD')
for line in output.splitlines():
lhs, rhs = line.split('\t', 1)
if rhs == 'HEAD' and lhs.startswith('ref:'):
return lhs[4:].strip()
return None
def _CheckForImmutableRevision(self):
try:
# if revision (sha or tag) is not present then following function

View File

@ -54,7 +54,8 @@ from the server and is installed in the .repo/ directory in the
current working directory.
The optional -b argument can be used to select the manifest branch
to checkout and use. If no branch is specified, master is assumed.
to checkout and use. If no branch is specified, the remote's default
branch is used.
The optional -m argument can be used to specify an alternate manifest
to be used. If no manifest is specified, the manifest default.xml
@ -215,24 +216,27 @@ to update the working directory files.
m._InitGitDir(mirror_git=mirrored_manifest_git)
if opt.manifest_branch:
m.revisionExpr = opt.manifest_branch
else:
m.revisionExpr = 'refs/heads/master'
else:
if opt.manifest_branch:
m.revisionExpr = opt.manifest_branch
else:
m.PreSync()
self._ConfigureDepth(opt)
# Set the remote URL before the remote branch as we might need it below.
if opt.manifest_url:
r = m.GetRemote(m.remote.name)
r.url = opt.manifest_url
r.ResetFetch()
r.Save()
if opt.manifest_branch:
m.revisionExpr = opt.manifest_branch
else:
if is_new:
default_branch = m.ResolveRemoteHead()
if default_branch is None:
# If the remote doesn't have HEAD configured, default to master.
default_branch = 'refs/heads/master'
m.revisionExpr = default_branch
else:
m.PreSync()
groups = re.split(r'[,\s]+', opt.groups)
all_platforms = ['linux', 'darwin', 'windows']
platformize = lambda x: 'platform-' + x