devtool: better support for local source files

* extract: Copy all local source files (i.e.  non-compressed/non-arcived
  SRC_URI files that have file:// URI prefix) - excluding patches - to
  the srctree repository. The files will be placed in a subdirectory
  called 'oe-local-files'. The oe-local-files directory is not committed
  to the Git repository, but, marked to be ignored by a .gitignore file.
  The developer can manually add and commit the files to Git if the
  changes to them need to be tracked.

  Before this patch, local source files (were copied (and committed) to
  the srctree repository only in some special cases (basically when
  S=WORKDIR) when doing devtool-extract. For most of the packages local
  files were not copied at all.

* update-recipe: This patch causes the local files to be 'synced' from
  the srctree (i.e. from the 'oe-local-files' subdirectory) to the
  layer.  Being 'synced' means that in addition to copying modified
  files over the original sources, devtool will also handle removing and
  adding local source files and updating the recipe accordingly.  We
  don't want to create patches against the local source files but rather
  update them directly.  Thus, 'oe-local-file' directory is ignored in
  patch generation when doing update-recipe, even if committed to Git.
  This functionality is only enabled if the 'oe-local-files' directory
  is present in srctree.

[YOCTO #7602]

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/scripts/lib/devtool/__init__.py b/scripts/lib/devtool/__init__.py
index 7b1ab1110d..c8c30202b1 100644
--- a/scripts/lib/devtool/__init__.py
+++ b/scripts/lib/devtool/__init__.py
@@ -183,11 +183,17 @@ def setup_git_repo(repodir, version, devbranch, basetag='devtool-base'):
     if not os.path.exists(os.path.join(repodir, '.git')):
         bb.process.run('git init', cwd=repodir)
         bb.process.run('git add .', cwd=repodir)
-        if version:
+        commit_cmd = ['git', 'commit', '-q']
+        stdout, _ = bb.process.run('git status --porcelain', cwd=repodir)
+        if not stdout:
+            commit_cmd.append('--allow-empty')
+            commitmsg = "Initial empty commit with no upstream sources"
+        elif version:
             commitmsg = "Initial commit from upstream at version %s" % version
         else:
             commitmsg = "Initial commit from upstream"
-        bb.process.run('git commit -q -m "%s"' % commitmsg, cwd=repodir)
+        commit_cmd += ['-m', commitmsg]
+        bb.process.run(commit_cmd, cwd=repodir)
 
     bb.process.run('git checkout -b %s' % devbranch, cwd=repodir)
     bb.process.run('git tag -f %s' % basetag, cwd=repodir)