patch.py: use --absolute-git-dir instead of --show-toplevel to retrieve gitdir

[YOCTO #14141]

Currently the gitdir is manually constructed using `git
rev-parse --show-toplevel` and appending `.git`. This is most of the time
correct but not always: `.git` can be a file with the following content:

gitdir: <some_folder>

This is the case for submodules, so when using devtool modify on a recipe
using submodules *and* patching files inside one of the submodules, do_patch
fails with the following error:

ERROR: Error executing a python function in exec_func_python() autogenerated:

The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
     0001:
 *** 0002:patch_do_patch(d)
     0003:
File: '<..>/poky/meta/classes-global/patch.bbclass', lineno: 157, function: patch_do_patch
     0153:        except Exception as exc:
     0154:            bb.utils.remove(process_tmpdir, True)
     0155:            bb.fatal("Importing patch '%s' with striplevel '%s'\n%s" % (parm['patchname'], parm['striplevel'], repr(exc).replace("\\n", "\n")))
     0156:        try:
 *** 0157:            resolver.Resolve()
     0158:        except bb.BBHandledException as e:
     0159:            bb.utils.remove(process_tmpdir, True)
     0160:            bb.fatal("Applying patch '%s' on target directory '%s'\n%s" % (parm['patchname'], patchdir, repr(e).replace("\\n", "\n")))
     0161:
File: '<..>/poky/meta/lib/oe/patch.py', lineno: 769, function: Resolve
     0765:    def Resolve(self):
     0766:        olddir = os.path.abspath(os.curdir)
     0767:        os.chdir(self.patchset.dir)
     0768:        try:
 *** 0769:            self.patchset.Push()
     0770:        except Exception:
     0771:            import sys
     0772:            os.chdir(olddir)
     0773:            raise
File: '<..>/poky/meta/lib/oe/patch.py', lineno: 274, function: Push
     0270:            else:
     0271:                next = 0
     0272:
     0273:            bb.note("applying patch %s" % self.patches[next])
 *** 0274:            ret = self._applypatch(self.patches[next], force)
     0275:
     0276:            self._current = next
     0277:            return ret
     0278:
File: '<..>/poky/meta/lib/oe/patch.py', lineno: 556, function: _applypatch
     0552:        if os.path.lexists(hooks_dir_backup):
     0553:            raise Exception("Git hooks backup directory already exists: %s" % hooks_dir_backup)
     0554:        if os.path.lexists(hooks_dir):
     0555:            shutil.move(hooks_dir, hooks_dir_backup)
 *** 0556:        os.mkdir(hooks_dir)
     0557:        commithook = os.path.join(hooks_dir, 'commit-msg')
     0558:        applyhook = os.path.join(hooks_dir, 'applypatch-msg')
     0559:        with open(commithook, 'w') as f:
     0560:            # NOTE: the formatting here is significant; if you change it you'll also need to
Exception: NotADirectoryError: [Errno 20] Not a directory: '<..>/build/tmp/work/core2-64-poky-linux/vulkan-samples/git/devtooltmp-n87_zx1i/workdir/git/third_party/spdlog/.git/hooks'

Using `git rev-parse --absolute-git-dir` instead of `git rev-parse
--show-toplevel` ensure we get the correct gitdir

(From OE-Core rev: f74879dd95b19504ce8a8554636d2310d0336806)

Signed-off-by: Julien Stephan <jstephan@baylibre.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/meta/lib/oe/patch.py b/meta/lib/oe/patch.py
index 5990896fdc..ff9afc9df9 100644
--- a/meta/lib/oe/patch.py
+++ b/meta/lib/oe/patch.py
@@ -547,7 +547,10 @@ class GitApplyTree(PatchTree):
         reporoot = (runcmd("git rev-parse --show-toplevel".split(), self.dir) or '').strip()
         if not reporoot:
             raise Exception("Cannot get repository root for directory %s" % self.dir)
-        hooks_dir = os.path.join(reporoot, '.git', 'hooks')
+        gitdir = (runcmd("git rev-parse --absolute-git-dir".split(), self.dir) or '').strip()
+        if not gitdir:
+            raise Exception("Cannot get gitdir for directory %s" % self.dir)
+        hooks_dir = os.path.join(gitdir, 'hooks')
         hooks_dir_backup = hooks_dir + '.devtool-orig'
         if os.path.lexists(hooks_dir_backup):
             raise Exception("Git hooks backup directory already exists: %s" % hooks_dir_backup)