bitbake: fetch2: Honour BB_FETCH_PREMIRRORONLY option

This should fix [Yocto 13353] and related to [Yocto 13233] as well.
Previously if git repo mirror has been updated in between of two builds
fetcher of the second build didn't try updated mirror but switched to
git clone from upstream instead. This is problem for offline builds.
Fix this to raise MirrorException if BB_FETCH_PREMIRRORONLY has been
specified by the mirror doesn't contain SRC_REV.

[YOCTO #13353]
[YOCTO #13233]

(Bitbake rev: b47ecab3e3aad5c5c376ec023aa82a51aa0f3b86)

Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 9 insertions, 4 deletions

diff --git a/bitbake/lib/bb/fetch2/git.py b/bitbake/lib/bb/fetch2/git.py
index 23f8c0da8f..07b3d9a7ff 100644
--- a/bitbake/lib/bb/fetch2/git.py
+++ b/bitbake/lib/bb/fetch2/git.py
@@ -353,10 +353,15 @@ class Git(FetchMethod):
         if ud.shallow and os.path.exists(ud.fullshallow) and self.need_update(ud, d):
             ud.localpath = ud.fullshallow
             return
-        elif os.path.exists(ud.fullmirror) and not os.path.exists(ud.clonedir):
-            bb.utils.mkdirhier(ud.clonedir)
-            runfetchcmd("tar -xzf %s" % ud.fullmirror, d, workdir=ud.clonedir)
-
+        elif os.path.exists(ud.fullmirror) and self.need_update(ud, d):
+            if not os.path.exists(ud.clonedir):
+                bb.utils.mkdirhier(ud.clonedir)
+                runfetchcmd("tar -xzf %s" % ud.fullmirror, d, workdir=ud.clonedir)
+            else:
+                tmpdir = tempfile.mkdtemp(dir=d.getVar('DL_DIR'))
+                runfetchcmd("tar -xzf %s" % ud.fullmirror, d, workdir=tmpdir)
+                fetch_cmd = "LANG=C %s fetch -f --progress %s " % (ud.basecmd, shlex.quote(tmpdir))
+                runfetchcmd(fetch_cmd, d, workdir=ud.clonedir)
         repourl = self._get_repo_url(ud)
 
         # If the repo still doesn't exist, fallback to cloning it