commit adef809ab8b15022a6c7256e472a88c9901dc64d
author Sam Saccone <samccone@google.com> Thu Jul 09 23:43:25 2020 +0000
committer Makoto Onuki <omakoto@google.com> Fri Jul 10 09:22:20 2020 -0700
tree c23cde41453e9697481fe3452b8d791da9bfba38
parent e1510db8d13df2c2f3dd923a4a09c20b6b531d92

Migrate from blame to history scoped blame

This mitigates the painpoint with `--filter=blob:none` where users have
to fetch large amounts of history from the network during repo upload.

utilize '$REF^!` to ensure we are only fetching a limited amount of
history.

Bug: b/160796554
Merged-in: I2c020aa64264834135f2b17f0c8a4a274bfd13bd
Change-Id: I2c020aa64264834135f2b17f0c8a4a274bfd13bd

gitlint/git.py

diff --git a/gitlint/git.py b/gitlint/git.py
index 9d796f6..e55aa06 100644
--- a/gitlint/git.py
+++ b/gitlint/git.py
@@ -126,7 +126,7 @@
 
     # Split as bytes, as the output may have some non unicode characters.
     blame_lines = subprocess.check_output(
-        ['git', 'blame', commit, '--porcelain', '--', filename]).split(
+        ['git', 'blame', (commit + '^!'), '--porcelain', '--', filename]).split(
             os.linesep.encode('utf-8'))
     modified_line_numbers = utils.filter_lines(
         blame_lines,