fetch2: Allow multiple src rev to be used in one src_uri

* SRC_URI format:
the SRC_URI are extended to allow multiple src rev:
name=<name1>,<name2>,...<name-n>
branch=<branch1>,<branch2>,...,<branch-n>
also SRCREV can be defined with
SRCREV_<name1> = xxxxx
SRCREV_<name2> = xxxxx

* FetchData extention
to support multiple src rev, several FetchData data are added:
- FetchData.names: list of name in SRC_URI,  one name per srcrev. name is the index of revision and branch
- FetchData.revisions: dictionary of name->revision.
- FetchData.branches: dictionary of name->branch.

For example, linux-yocto recipes becomes:
SRC_URI = "git://git.pokylinux.org/linux-yocto-2.6.37;protocol=git;branch=${KBRANCH},meta;name=machine,meta"

FetchData.names = ['machine', 'meta']
FetchData.revisions = { 'machine':xxxxx, 'meta':xxxxxx }
FetchData.branches = { 'machine':${KBRANCH}, 'meta':'meta'}

* generic revision handling extension
the related revision handling code in fetch2.__init__.py are changed accordingly. the major change is add name parameter to indicate which src rev to handling. originally there is one src rev per FetchData, so FetchData parameter is enough. now since one FetchData has multiple src rev, it is necessary to use FetchData + name to specifiy src rev.

* git extension
git fetcher are also revised to take advantage of the multiple src rev in FetchData. especially the download() method are enhanced to fetch multiple src rev.

* other fetcher (svn, hg, ...) does not support multiple src rev. they just sync the API to add name, and then simply ignore the name. no actually functional change

(From Poky rev: 0e837e6844be449659bb96a1498e54a8b9442d13)

Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 31 insertions, 35 deletions

diff --git a/lib/bb/fetch2/git.py b/lib/bb/fetch2/git.py
index 07af02f06..c54d826a0 100644
--- a/lib/bb/fetch2/git.py
+++ b/lib/bb/fetch2/git.py
@@ -57,7 +57,13 @@ class Git(Fetch):
         if 'nocheckout' in ud.parm:
             ud.nocheckout = True
 
-        ud.branch = ud.parm.get("branch", "master")
+        branches = ud.parm.get("branch", "master").split(',')
+        if len(branches) != len(ud.names):
+            raise bb.fetch2.ParameterError("SRC_URI (%) name and branch number mismatch" % ud.url)
+        ud.branches = {}
+        for name in ud.names:
+            branch = branches[ud.names.index(name)]
+            ud.branches[name] = branch
 
         gitsrcname = '%s%s' % (ud.host, ud.path.replace('/', '.'))
         ud.mirrortarball = 'git_%s.tar.gz' % (gitsrcname)
@@ -66,25 +72,18 @@ class Git(Fetch):
         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)
+        for name in ud.names:
+            if not ud.revisions[name] or ud.revisions[name] == "master":
+                ud.revisions[name] = self.latest_revision(url, ud, d, name)
 
         ud.localfile = ud.mirrortarball
 
-        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 not self._contains_ref(ud.tag, d):
-            return True
+        for name in ud.names:
+            if not self._contains_ref(ud.revisions[name], d):
+                return True
         return False
 
     def try_premirror(self, u, ud, d):
@@ -122,18 +121,15 @@ class Git(Fetch):
 
         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)
-            ud.repochanged = True
+        for name in ud.names:
+            if not self._contains_ref(ud.revisions[name], d):
+                # Remove all but the .git directory
+                bb.fetch2.check_network_access(d, "git fetch %s%s" %(ud.host, ud.path))
+                runfetchcmd("%s fetch %s://%s%s%s %s" % (ud.basecmd, ud.proto, username, ud.host, ud.path, ud.branches[name]), 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)
+                ud.repochanged = True
 
     def build_mirror_data(self, url, ud, d):
         # Generate a mirror tarball if needed
@@ -141,7 +137,7 @@ class Git(Fetch):
 
         os.chdir(ud.clonedir)
         mirror_tarballs = data.getVar("BB_GENERATE_MIRROR_TARBALLS", d, True)
-        if (mirror_tarballs != "0" or 'fullclone' in ud.parm) and ud.repochanged:
+        if mirror_tarballs != "0" and ud.repochanged:
             logger.info("Creating tarball of git repository")
             runfetchcmd("tar -czf %s %s" % (repofile, os.path.join(".", ".git", "*") ), d)
 
@@ -165,7 +161,7 @@ class Git(Fetch):
             runfetchcmd("cp -af %s/.git/packed-refs %s/.git/" %(ud.clonedir, destdir), d)
         if not ud.nocheckout:
             os.chdir(destdir)
-            runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.tag, readpathspec), d)
+            runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.revisions[ud.names[0]], readpathspec), d)
             runfetchcmd("%s checkout-index -q -f -a" % ud.basecmd, d)
         return True
 
@@ -177,13 +173,13 @@ class Git(Fetch):
         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):
+    def _revision_key(self, url, ud, d, name):
         """
         Return a unique key for the url
         """
-        return "git:" + ud.host + ud.path.replace('/', '.') + ud.branch
+        return "git:" + ud.host + ud.path.replace('/', '.') + ud.branches[name]
 
-    def _latest_revision(self, url, ud, d):
+    def _latest_revision(self, url, ud, d, name):
         """
         Compute the HEAD revision for the url
         """
@@ -192,16 +188,16 @@ class Git(Fetch):
         else:
             username = ""
 
-        bb.fetch2.check_network_access(d, "git ls-remote %s%s %s" % (ud.host, ud.path, ud.branch))
+        bb.fetch2.check_network_access(d, "git ls-remote %s%s %s" % (ud.host, ud.path, ud.branches[name]))
         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)
+        cmd = "%s ls-remote %s://%s%s%s %s" % (basecmd, ud.proto, username, ud.host, ud.path, ud.branches[name])
         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 _build_revision(self, url, ud, d, name):
+        return ud.revisions[name]
 
     def _sortable_buildindex_disabled(self, url, ud, d, rev):
         """