check-style: Improve the proposed git-rebase command

Include the sha used for the dry-run instead of using 'origin/main'.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2733>

1 files changed, 6 insertions, 2 deletions

diff --git a/check-style.py b/check-style.py
index a4daefaa4..cabcbb7cc 100755
--- a/check-style.py
+++ b/check-style.py
@@ -120,7 +120,7 @@ def reformat_chunks(chunks, rewrite):
     return changed
 
 
-parser = argparse.ArgumentParser(description='Check code style.')
+parser = argparse.ArgumentParser(description='Check code style. Needs uncrustify installed.')
 parser.add_argument('--sha', metavar='SHA', type=str,
                     help='SHA for the commit to compare HEAD with')
 parser.add_argument('--dry-run', '-d', type=bool,
@@ -146,7 +146,11 @@ if dry_run is not True and rewrite is True:
     subprocess.run(["git", "commit", "--all", "--amend", "-C", "HEAD"], stdout=subprocess.DEVNULL)
     os._exit(0)
 elif dry_run is True and changed is True:
-    print ("\nIssue the following command in your local tree to apply the suggested changes (needs uncrustify installed):\n\n $ git rebase origin/main --exec \"./check-style.py -r\" \n")
+    print(f"""
+Issue the following command in your local tree to apply the suggested changes:
+
+    $ git rebase {sha} --exec "./check-style.py -r"
+""")
     os._exit(-1)
 
 os._exit(0)