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# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake 'Fetch' git submodules implementation
Inherits from and extends the Git fetcher to retrieve submodules of a git repository
after cloning.
SRC_URI = "gitsm://<see Git fetcher for syntax>"
See the Git fetcher, git://, for usage documentation.
NOTE: Switching a SRC_URI from "git://" to "gitsm://" requires a clean of your recipe.
"""
# Copyright (C) 2013 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os
import bb
from bb.fetch2.git import Git
from bb.fetch2 import runfetchcmd
from bb.fetch2 import logger
class GitSM(Git):
def supports(self, ud, d):
"""
Check to see if a given url can be fetched with git.
"""
return ud.type in ['gitsm']
def uses_submodules(self, ud, d, wd):
for name in ud.names:
try:
runfetchcmd("%s show %s:.gitmodules" % (ud.basecmd, ud.revisions[name]), d, quiet=True, workdir=wd)
return True
except bb.fetch.FetchError:
pass
return False
def _set_relative_paths(self, repopath):
"""
Fix submodule paths to be relative instead of absolute,
so that when we move the repo it doesn't break
(In Git 1.7.10+ this is done automatically)
"""
submodules = []
with open(os.path.join(repopath, '.gitmodules'), 'r') as f:
for line in f.readlines():
if line.startswith('[submodule'):
submodules.append(line.split('"')[1])
for module in submodules:
repo_conf = os.path.join(repopath, module, '.git')
if os.path.exists(repo_conf):
with open(repo_conf, 'r') as f:
lines = f.readlines()
newpath = ''
for i, line in enumerate(lines):
if line.startswith('gitdir:'):
oldpath = line.split(': ')[-1].rstrip()
if oldpath.startswith('/'):
newpath = '../' * (module.count('/') + 1) + '.git/modules/' + module
lines[i] = 'gitdir: %s\n' % newpath
break
if newpath:
with open(repo_conf, 'w') as f:
for line in lines:
f.write(line)
repo_conf2 = os.path.join(repopath, '.git', 'modules', module, 'config')
if os.path.exists(repo_conf2):
with open(repo_conf2, 'r') as f:
lines = f.readlines()
newpath = ''
for i, line in enumerate(lines):
if line.lstrip().startswith('worktree = '):
oldpath = line.split(' = ')[-1].rstrip()
if oldpath.startswith('/'):
newpath = '../' * (module.count('/') + 3) + module
lines[i] = '\tworktree = %s\n' % newpath
break
if newpath:
with open(repo_conf2, 'w') as f:
for line in lines:
f.write(line)
def update_submodules(self, ud, d, allow_network):
# We have to convert bare -> full repo, do the submodule bit, then convert back
tmpclonedir = ud.clonedir + ".tmp"
gitdir = tmpclonedir + os.sep + ".git"
bb.utils.remove(tmpclonedir, True)
os.mkdir(tmpclonedir)
os.rename(ud.clonedir, gitdir)
runfetchcmd("sed " + gitdir + "/config -i -e 's/bare.*=.*true/bare = false/'", d)
runfetchcmd(ud.basecmd + " reset --hard", d, workdir=tmpclonedir)
runfetchcmd(ud.basecmd + " checkout -f " + ud.revisions[ud.names[0]], d, workdir=tmpclonedir)
try:
if allow_network:
fetch_flags = ""
else:
fetch_flags = "--no-fetch"
# The 'git submodule sync' sandwiched between two successive 'git submodule update' commands is
# intentional. See the notes on the similar construction in download() for an explanation.
runfetchcmd("%(basecmd)s submodule update --init --recursive %(fetch_flags)s || (%(basecmd)s submodule sync --recursive && %(basecmd)s submodule update --init --recursive %(fetch_flags)s)" % {'basecmd': ud.basecmd, 'fetch_flags' : fetch_flags}, d, workdir=tmpclonedir)
except bb.fetch.FetchError:
if allow_network:
raise
else:
# This method was called as a probe to see whether the submodule history
# is complete enough to allow the current working copy to have its
# modules filled in. It's not, so swallow up the exception and report
# the negative result.
return False
finally:
self._set_relative_paths(tmpclonedir)
runfetchcmd("sed " + gitdir + "/config -i -e 's/bare.*=.*false/bare = true/'", d, workdir=tmpclonedir)
os.rename(gitdir, ud.clonedir,)
bb.utils.remove(tmpclonedir, True)
return True
def need_update(self, ud, d):
main_repo_needs_update = Git.need_update(self, ud, d)
# First check that the main repository has enough history fetched. If it doesn't, then we don't
# even have the .gitmodules and gitlinks for the submodules to attempt asking whether the
# submodules' histories are recent enough.
if main_repo_needs_update:
return True
# Now check that the submodule histories are new enough. The git-submodule command doesn't have
# any clean interface for doing this aside from just attempting the checkout (with network
# fetched disabled).
return not self.update_submodules(ud, d, allow_network=False)
def download(self, ud, d):
Git.download(self, ud, d)
if not ud.shallow or ud.localpath != ud.fullshallow:
submodules = self.uses_submodules(ud, d, ud.clonedir)
if submodules:
self.update_submodules(ud, d, allow_network=True)
def clone_shallow_local(self, ud, dest, d):
super(GitSM, self).clone_shallow_local(ud, dest, d)
runfetchcmd('cp -fpPRH "%s/modules" "%s/"' % (ud.clonedir, os.path.join(dest, '.git')), d)
def unpack(self, ud, destdir, d):
Git.unpack(self, ud, destdir, d)
if self.uses_submodules(ud, d, ud.destdir):
runfetchcmd(ud.basecmd + " checkout " + ud.revisions[ud.names[0]], d, workdir=ud.destdir)
# Copy over the submodules' fetched histories too.
if ud.bareclone:
repo_conf = ud.destdir
else:
repo_conf = os.path.join(ud.destdir, '.git')
if os.path.exists(ud.clonedir):
# This is not a copy unpacked from a shallow mirror clone. So
# the manual intervention to populate the .git/modules done
# in clone_shallow_local() won't have been done yet.
runfetchcmd("cp -fpPRH %s %s" % (os.path.join(ud.clonedir, 'modules'), repo_conf), d)
fetch_flags = "--no-fetch"
elif os.path.exists(os.path.join(repo_conf, 'modules')):
# Unpacked from a shallow mirror clone. Manual population of
# .git/modules is already done.
fetch_flags = "--no-fetch"
else:
# This isn't fatal; git-submodule will just fetch it
# during do_unpack().
fetch_flags = ""
bb.error("submodule history not retrieved during do_fetch()")
# Careful not to hit the network during unpacking; all history should already
# be fetched.
#
# The repeated attempts to do the submodule initialization sandwiched around a sync to
# install the correct remote URLs into the submodules' .git/config metadata are deliberate.
# Bad remote URLs are leftover in the modules' .git/config files from the unpack of bare
# clone tarballs and an initial 'git submodule update' is necessary to prod them back to
# enough life so that the 'git submodule sync' realizes the existing module .git/config
# files exist to be updated.
runfetchcmd("%(basecmd)s submodule update --init --recursive %(fetch_flags)s || (%(basecmd)s submodule sync --recursive && %(basecmd)s submodule update --init --recursive %(fetch_flags)s)" % {'basecmd': ud.basecmd, 'fetch_flags': fetch_flags}, d, workdir=ud.destdir)
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