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3a3fc6b071
poky/bitbake/lib/bb/fetch2/git.py
Yu Ke 3a3fc6b071 bb.fetch2: Add git unpack 
The git download method clones the git repository to the local machine. The unpack process
can be optimised to be a local to local machine clone or a direct readtree operation to the
destination using git.will clone git repo to local, so git unpack can be simplified
to only checkouting the code to the work dir. For fullclone case, we also
need to manually copy all the ref info, which is needed by the later do_kernel_checkout().
Rather than use hardlinks, we reference the repository using alternatives since the
download directory may be on a different filesystem.

[Change to use -s by Richard Purdie]

Signed-off-by: Yu Ke <ke.yu@intel.com>
2011-02-02 17:05:48 +00:00

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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 implementation
"""
#Copyright (C) 2005 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 import data
from bb.fetch2 import Fetch
from bb.fetch2 import runfetchcmd
from bb.fetch2 import logger
class Git(Fetch):
"""Class to fetch a module or modules from git repositories"""
def init(self, d):
#
# Only enable _sortable revision if the key is set
#
if bb.data.getVar("BB_GIT_CLONE_FOR_SRCREV", d, True):
self._sortable_buildindex = self._sortable_buildindex_disabled
def supports(self, url, ud, d):
"""
Check to see if a given url can be fetched with git.
"""
return ud.type in ['git']
def urldata_init(self, ud, d):
"""
init git specific variable within url data
so that the git method like latest_revision() can work
"""
if 'protocol' in ud.parm:
ud.proto = ud.parm['protocol']
elif not ud.host:
ud.proto = 'file'
else:
ud.proto = "rsync"
ud.branch = ud.parm.get("branch", "master")
gitsrcname = '%s%s' % (ud.host, ud.path.replace('/', '.'))
ud.mirrortarball = 'git_%s.tar.gz' % (gitsrcname)
ud.clonedir = os.path.join(data.expand('${GITDIR}', d), gitsrcname)
ud.basecmd = data.getVar("FETCHCMD_git", d, True) or "git"
def localpath(self, url, ud, d):
ud.tag = ud.revision
if not ud.tag or ud.tag == "master":
ud.tag = self.latest_revision(url, ud, d)
subdir = ud.parm.get("subpath", "")
if subdir != "":
if subdir.endswith("/"):
subdir = subdir[:-1]
subdirpath = os.path.join(ud.path, subdir);
else:
subdirpath = ud.path;
if 'fullclone' in ud.parm:
ud.localfile = ud.mirrortarball
else:
ud.localfile = data.expand('git_%s%s_%s.tar.gz' % (ud.host, subdirpath.replace('/', '.'), ud.tag), d)
if 'noclone' in ud.parm:
ud.localfile = None
return None
return os.path.join(data.getVar("DL_DIR", d, True), ud.localfile)
def forcefetch(self, url, ud, d):
if 'fullclone' in ud.parm:
return True
if 'noclone' in ud.parm:
return False
if os.path.exists(ud.localpath):
return False
if not self._contains_ref(ud.tag, d):
return True
return False
def try_premirror(self, u, ud, d):
if 'noclone' in ud.parm:
return False
if os.path.exists(ud.clonedir):
return False
if os.path.exists(ud.localpath):
return False
return True
def download(self, loc, ud, d):
"""Fetch url"""
if ud.user:
username = ud.user + '@'
else:
username = ""
repofile = os.path.join(data.getVar("DL_DIR", d, 1), ud.mirrortarball)
# If the checkout doesn't exist and the mirror tarball does, extract it
if not os.path.exists(ud.clonedir) and os.path.exists(repofile):
bb.mkdirhier(ud.clonedir)
os.chdir(ud.clonedir)
runfetchcmd("tar -xzf %s" % (repofile), d)
# If the repo still doesn't exist, fallback to cloning it
if not os.path.exists(ud.clonedir):
bb.fetch2.check_network_access(d, "git clone %s%s" % (ud.host, ud.path))
runfetchcmd("%s clone -n %s://%s%s%s %s" % (ud.basecmd, ud.proto, username, ud.host, ud.path, ud.clonedir), d)
os.chdir(ud.clonedir)
# Update the checkout if needed
if not self._contains_ref(ud.tag, d) or 'fullclone' in ud.parm:
# Remove all but the .git directory
bb.fetch2.check_network_access(d, "git fetch %s%s" %(ud.host, ud.path))
runfetchcmd("rm * -Rf", d)
if 'fullclone' in ud.parm:
runfetchcmd("%s fetch --all" % (ud.basecmd), d)
else:
runfetchcmd("%s fetch %s://%s%s%s %s" % (ud.basecmd, ud.proto, username, ud.host, ud.path, ud.branch), d)
runfetchcmd("%s fetch --tags %s://%s%s%s" % (ud.basecmd, ud.proto, username, ud.host, ud.path), d)
runfetchcmd("%s prune-packed" % ud.basecmd, d)
runfetchcmd("%s pack-redundant --all | xargs -r rm" % ud.basecmd, d)
def build_mirror_data(self, url, ud, d):
# Generate a mirror tarball if needed
coname = '%s' % (ud.tag)
codir = os.path.join(ud.clonedir, coname)
repofile = os.path.join(data.getVar("DL_DIR", d, 1), ud.mirrortarball)
os.chdir(ud.clonedir)
mirror_tarballs = data.getVar("BB_GENERATE_MIRROR_TARBALLS", d, True)
if mirror_tarballs != "0" or 'fullclone' in ud.parm:
logger.info("Creating tarball of git repository")
runfetchcmd("tar -czf %s %s" % (repofile, os.path.join(".", ".git", "*") ), d)
if 'fullclone' in ud.parm:
return
if os.path.exists(codir):
bb.utils.prunedir(codir)
subdir = ud.parm.get("subpath", "")
if subdir != "":
if subdir.endswith("/"):
subdirbase = os.path.basename(subdir[:-1])
else:
subdirbase = os.path.basename(subdir)
else:
subdirbase = ""
if subdir != "":
readpathspec = ":%s" % (subdir)
codir = os.path.join(codir, "git")
coprefix = os.path.join(codir, subdirbase, "")
else:
readpathspec = ""
coprefix = os.path.join(codir, "git", "")
scmdata = ud.parm.get("scmdata", "")
if scmdata == "keep":
runfetchcmd("%s clone -n %s %s" % (ud.basecmd, ud.clonedir, coprefix), d)
os.chdir(coprefix)
runfetchcmd("%s checkout -q -f %s%s" % (ud.basecmd, ud.tag, readpathspec), d)
else:
bb.mkdirhier(codir)
os.chdir(ud.clonedir)
runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.tag, readpathspec), d)
runfetchcmd("%s checkout-index -q -f --prefix=%s -a" % (ud.basecmd, coprefix), d)
os.chdir(codir)
logger.info("Creating tarball of git checkout")
runfetchcmd("tar -czf %s %s" % (ud.localpath, os.path.join(".", "*") ), d)
os.chdir(ud.clonedir)
bb.utils.prunedir(codir)
def unpack(self, ud, destdir, d):
""" unpack the downloaded src to destdir"""
subdir = ud.parm.get("subpath", "")
if subdir != "":
readpathspec = ":%s" % (subdir)
else:
readpathspec = ""
destdir = os.path.join(destdir, "git/")
if os.path.exists(destdir):
bb.utils.prunedir(destdir)
if 'fullclone' in ud.parm:
runfetchcmd("git clone -s -n %s %s" % (ud.clonedir, destdir), d)
if os.path.exists("%s/.git/refs/remotes/origin" % ud.clonedir):
runfetchcmd("cp -af %s/.git/refs/remotes/origin/* %s/.git/refs/remotes/origin/" %(ud.clonedir, destdir), d)
if os.path.exists("%s/.git/packed-refs" % ud.clonedir):
runfetchcmd("cp -af %s/.git/packed-refs %s/.git/" %(ud.clonedir, destdir), d)
else:
os.chdir(ud.clonedir)
runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.tag, readpathspec), d)
runfetchcmd("%s checkout-index -q -f --prefix=%s -a" % (ud.basecmd, destdir), d)
return True
def supports_srcrev(self):
return True
def _contains_ref(self, tag, d):
basecmd = data.getVar("FETCHCMD_git", d, True) or "git"
output = runfetchcmd("%s log --pretty=oneline -n 1 %s -- 2> /dev/null | wc -l" % (basecmd, tag), d, quiet=True)
return output.split()[0] != "0"
def _revision_key(self, url, ud, d):
"""
Return a unique key for the url
"""
return "git:" + ud.host + ud.path.replace('/', '.') + ud.branch
def _latest_revision(self, url, ud, d):
"""
Compute the HEAD revision for the url
"""
if ud.user:
username = ud.user + '@'
else:
username = ""
bb.fetch2.check_network_access(d, "git ls-remote %s%s %s" % (ud.host, ud.path, ud.branch))
basecmd = data.getVar("FETCHCMD_git", d, True) or "git"
cmd = "%s ls-remote %s://%s%s%s %s" % (basecmd, ud.proto, username, ud.host, ud.path, ud.branch)
output = runfetchcmd(cmd, d, True)
if not output:
raise bb.fetch2.FetchError("Fetch command %s gave empty output\n" % (cmd))
return output.split()[0]
def _build_revision(self, url, ud, d):
return ud.tag
def _sortable_buildindex_disabled(self, url, ud, d, rev):
"""
Return a suitable buildindex for the revision specified. This is done by counting revisions
using "git rev-list" which may or may not work in different circumstances.
"""
cwd = os.getcwd()
# Check if we have the rev already
if not os.path.exists(ud.clonedir):
print("no repo")
self.download(None, ud, d)
if not os.path.exists(ud.clonedir):
logger.error("GIT repository for %s doesn't exist in %s, cannot get sortable buildnumber, using old value", url, ud.clonedir)
return None
os.chdir(ud.clonedir)
if not self._contains_ref(rev, d):
self.download(None, ud, d)
output = runfetchcmd("%s rev-list %s -- 2> /dev/null | wc -l" % (ud.basecmd, rev), d, quiet=True)
os.chdir(cwd)
buildindex = "%s" % output.split()[0]
logger.debug(1, "GIT repository for %s in %s is returning %s revisions in rev-list before %s", url, ud.clonedir, buildindex, rev)
return buildindex
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