Add more environment variables am: e9db4ebaf5

am: f6ce62d673

Change-Id: I48baaccd5d7178624561f6c54461ee8c95c11de2

3 files changed, 26 insertions, 3 deletions

diff --git a/README.md b/README.md
index e011d8a..fd3b97f 100644
--- a/README.md
+++ b/README.md
@@ -82,8 +82,13 @@ A few environment variables are set so scripts don't need to discover things.
    e.g. `platform/tools/repohooks`
 * `REPO_PATH`: The path to the project relative to the root.
    e.g. `tools/repohooks`
-* `REPO_REMOTE`: The remote git URL.
-   e.g. `https://android.googlesource.com/platform/tools/repohooks`
+* `REPO_REMOTE`: The name of the git remote.
+   e.g. `aosp`.
+* `REPO_LREV`: The name of the remote revision, translated to a local tracking
+   branch. This is typically latest commit in the remote-tracking branch.
+   e.g. `ec044d3e9b608ce275f02092f86810a3ba13834e`
+* `REPO_RREV`: The remote revision.
+   e.g. `master`
 * `PREUPLOAD_COMMIT`: The commit that is currently being checked.
    e.g. `1f89dce0468448fa36f632d2fc52175cd6940a91`
 
diff --git a/pre-upload.py b/pre-upload.py
index f15a9b7..447b8bf 100755
--- a/pre-upload.py
+++ b/pre-upload.py
@@ -205,14 +205,17 @@ def _run_project_hooks(project_name, proj_dir=None,
     # Set up the environment like repo would with the forall command.
     try:
         remote = rh.git.get_upstream_remote()
+        upstream_branch = rh.git.get_upstream_branch()
     except rh.utils.RunCommandError as e:
         print('upstream remote cannot be found: %s' % (e,), file=sys.stderr)
         print('Did you run repo start?', file=sys.stderr)
         sys.exit(1)
     os.environ.update({
-        'REPO_PROJECT': project_name,
+        'REPO_LREV': rh.git.get_commit_for_ref(upstream_branch),
         'REPO_PATH': proj_dir,
+        'REPO_PROJECT': project_name,
         'REPO_REMOTE': remote,
+        'REPO_RREV': rh.git.get_remote_revision(upstream_branch, remote),
     })
 
     output = Output(project_name, len(hooks))
diff --git a/rh/git.py b/rh/git.py
index c78eb3b..8cf2557 100644
--- a/rh/git.py
+++ b/rh/git.py
@@ -70,6 +70,21 @@ def get_upstream_branch():
     return full_upstream.replace('heads', 'remotes/' + remote)
 
 
+def get_commit_for_ref(ref):
+    """Returns the latest commit for this ref."""
+    cmd = ['git', 'rev-parse', ref]
+    result = rh.utils.run_command(cmd, capture_output=True)
+    return result.output.strip()
+
+
+def get_remote_revision(ref, remote):
+    """Returns the remote revision for this ref."""
+    prefix = 'refs/remotes/%s/' % remote
+    if ref.startswith(prefix):
+        return ref[len(prefix):]
+    return ref
+
+
 def get_patch(commit):
     """Returns the patch for this commit."""
     cmd = ['git', 'format-patch', '--stdout', '-1', commit]