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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
import copy
from bb.fetch2.git import Git
from bb.fetch2 import runfetchcmd
from bb.fetch2 import logger
from bb.fetch2 import Fetch
from bb.fetch2 import BBFetchException
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']
@staticmethod
def parse_gitmodules(gitmodules):
modules = {}
module = ""
for line in gitmodules.splitlines():
if line.startswith('[submodule'):
module = line.split('"')[1]
modules[module] = {}
elif module and line.strip().startswith('path'):
path = line.split('=')[1].strip()
modules[module]['path'] = path
elif module and line.strip().startswith('url'):
url = line.split('=')[1].strip()
modules[module]['url'] = url
return modules
def update_submodules(self, ud, d):
submodules = []
paths = {}
revision = {}
uris = {}
local_paths = {}
for name in ud.names:
try:
gitmodules = runfetchcmd("%s show %s:.gitmodules" % (ud.basecmd, ud.revisions[name]), d, quiet=True, workdir=ud.clonedir)
except:
# No submodules to update
continue
for m, md in self.parse_gitmodules(gitmodules).items():
submodules.append(m)
paths[m] = md['path']
revision[m] = ud.revisions[name]
uris[m] = md['url']
if uris[m].startswith('..'):
newud = copy.copy(ud)
newud.path = os.path.realpath(os.path.join(newud.path, md['url']))
uris[m] = Git._get_repo_url(self, newud)
for module in submodules:
try:
module_hash = runfetchcmd("%s ls-tree -z -d %s %s" % (ud.basecmd, revision[module], paths[module]), d, quiet=True, workdir=ud.clonedir)
except:
# If the command fails, we don't have a valid file to check. If it doesn't
# fail -- it still might be a failure, see next check...
module_hash = ""
if not module_hash:
logger.debug(1, "submodule %s is defined, but is not initialized in the repository. Skipping", module)
continue
module_hash = module_hash.split()[2]
# Build new SRC_URI
proto = uris[module].split(':', 1)[0]
url = uris[module].replace('%s:' % proto, 'gitsm:', 1)
url += ';protocol=%s' % proto
url += ";name=%s" % module
url += ";bareclone=1;nocheckout=1;nobranch=1"
ld = d.createCopy()
# Not necessary to set SRC_URI, since we're passing the URI to
# Fetch.
#ld.setVar('SRC_URI', url)
ld.setVar('SRCREV_%s' % module, module_hash)
# Workaround for issues with SRCPV/SRCREV_FORMAT errors
# error refer to 'multiple' repositories. Only the repository
# in the original SRC_URI actually matters...
ld.setVar('SRCPV', d.getVar('SRCPV'))
ld.setVar('SRCREV_FORMAT', module)
newfetch = Fetch([url], ld, cache=False)
newfetch.download()
local_paths[module] = newfetch.localpath(url)
# Correct the submodule references to the local download version...
runfetchcmd("%(basecmd)s config submodule.%(module)s.url %(url)s" % {'basecmd': ud.basecmd, 'module': module, 'url' : local_paths[module]}, d, workdir=ud.clonedir)
symlink_path = os.path.join(ud.clonedir, 'modules', paths[module])
if not os.path.exists(symlink_path):
try:
os.makedirs(os.path.dirname(symlink_path), exist_ok=True)
except OSError:
pass
os.symlink(local_paths[module], symlink_path)
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)
def download(self, ud, d):
Git.download(self, ud, d)
if not ud.shallow or ud.localpath != ud.fullshallow:
self.update_submodules(ud, d)
def copy_submodules(self, submodules, ud, name, destdir, d):
if ud.bareclone:
repo_conf = destdir
else:
repo_conf = os.path.join(destdir, '.git')
if submodules and not os.path.exists(os.path.join(repo_conf, 'modules')):
os.mkdir(os.path.join(repo_conf, 'modules'))
for module, md in submodules.items():
srcpath = os.path.join(ud.clonedir, 'modules', md['path'])
modpath = os.path.join(repo_conf, 'modules', md['path'])
# Check if the module is initialized
try:
module_hash = runfetchcmd("%s ls-tree -z -d %s %s" % (ud.basecmd, ud.revisions[name], md['path']), d, quiet=True, workdir=ud.clonedir)
except:
# If the command fails, we don't have a valid file to check. If it doesn't
# fail -- it still might be a failure, see next check...
module_hash = ""
if not module_hash:
logger.debug(1, "submodule %s is defined, but is not initialized in the repository. Skipping", module)
continue
if os.path.exists(srcpath):
if os.path.exists(os.path.join(srcpath, '.git')):
srcpath = os.path.join(srcpath, '.git')
target = modpath
if os.path.exists(modpath):
target = os.path.dirname(modpath)
os.makedirs(os.path.dirname(target), exist_ok=True)
runfetchcmd("cp -fpLR %s %s" % (srcpath, target), d)
elif os.path.exists(modpath):
# Module already exists, likely unpacked from a shallow mirror clone
pass
else:
# This is fatal, as we do NOT want git-submodule to hit the network
raise bb.fetch2.FetchError('Submodule %s does not exist in %s or %s.' % (module, srcpath, modpath))
def clone_shallow_local(self, ud, dest, d):
super(GitSM, self).clone_shallow_local(ud, dest, d)
# Copy over the submodules' fetched histories too.
repo_conf = os.path.join(dest, '.git')
submodules = []
for name in ud.names:
try:
gitmodules = runfetchcmd("%s show %s:.gitmodules" % (ud.basecmd, ud.revision), d, quiet=True, workdir=dest)
except:
# No submodules to update
continue
submodules = self.parse_gitmodules(gitmodules)
self.copy_submodules(submodules, ud, name, dest, d)
def unpack(self, ud, destdir, d):
Git.unpack(self, ud, destdir, d)
# Copy over the submodules' fetched histories too.
if ud.bareclone:
repo_conf = ud.destdir
else:
repo_conf = os.path.join(ud.destdir, '.git')
update_submodules = False
paths = {}
uris = {}
local_paths = {}
for name in ud.names:
try:
gitmodules = runfetchcmd("%s show HEAD:.gitmodules" % (ud.basecmd), d, quiet=True, workdir=ud.destdir)
except:
# No submodules to update
continue
submodules = self.parse_gitmodules(gitmodules)
self.copy_submodules(submodules, ud, name, ud.destdir, d)
submodules_queue = [(module, os.path.join(repo_conf, 'modules', md['path'])) for module, md in submodules.items()]
while len(submodules_queue) != 0:
module, modpath = submodules_queue.pop()
# add submodule children recursively
try:
gitmodules = runfetchcmd("%s show HEAD:.gitmodules" % (ud.basecmd), d, quiet=True, workdir=modpath)
for m, md in self.parse_gitmodules(gitmodules).items():
submodules_queue.append([m, os.path.join(modpath, 'modules', md['path'])])
except:
# no children
pass
# There are submodules to update
update_submodules = True
# Determine (from the submodule) the correct url to reference
try:
output = runfetchcmd("%(basecmd)s config remote.origin.url" % {'basecmd': ud.basecmd}, d, workdir=modpath)
except bb.fetch2.FetchError as e:
# No remote url defined in this submodule
continue
local_paths[module] = output
# Setup the local URL properly (like git submodule init or sync would do...)
runfetchcmd("%(basecmd)s config submodule.%(module)s.url %(url)s" % {'basecmd': ud.basecmd, 'module': module, 'url' : local_paths[module]}, d, workdir=ud.destdir)
# Ensure the submodule repository is NOT set to bare, since we're checking it out...
runfetchcmd("%s config core.bare false" % (ud.basecmd), d, quiet=True, workdir=modpath)
if update_submodules:
# Run submodule update, this sets up the directories -- without touching the config
runfetchcmd("%s submodule update --recursive --no-fetch" % (ud.basecmd), d, quiet=True, workdir=ud.destdir)
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