tree 52e4a714c09930106105e3629f0abb2618f3f5ae
parent 526295467bd18f5f8d9cb11f03a1c56cb40b7b28
author Matt Stark <msta@google.com> 1790130900 +1000
committer gn-scoped@luci-project-accounts.iam.gserviceaccount.com <gn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1791435250 -0700

Do not generate last_commit_position.h in debug builds.

Whenever a commit is created or squashed in git/jj, the commit hash of
HEAD changes, which previously updated last_commit_position.h during
gen.py and forced a rebuild of gn_main.cc and relinking of gn.

In debug mode, generate a dummy last_commit_position.h instead so that
squashes do not invalidate the build cache. Real commit positions
continue to be generated for release builds.

Change-Id: Ib9e2fac8c1ec74f04fb66f382629e1dc6a6a6964
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/27280
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Commit-Queue: Matt Stark <msta@google.com>