tree e3587166d4ddbf25e248e9508acaee7eabc53bba
parent 2b683eff60274dbe5874e81ee98a78c47169283e
author RJ Ascani <rjascani@google.com> 1603154511 -0700
committer Commit Bot <commit-bot@chromium.org> 1608233037 +0000

Add clean_stale command

This CL adds a utility command to gn for cleaning out stale data from
build directories. As users change configurations, arguments or gn
files, the ninja build graph gets updated, but files and ninja database
entries remain. This command is effectively a wrapper around a pair of
ninja tools: cleandead and recompact. The former removes no longer
needed output files from the build directory and the latter prunes their
entries from the .ninja_log and .ninja_deps files.

Additionally, --clean-stale has been added as an option to the gen
command.

Change-Id: Ic931c1ac9fdf954d9a40318c7747ac9992a64045
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/10401
Commit-Queue: RJ Ascani <rjascani@google.com>
Reviewed-by: Brett Wilson <brettw@chromium.org>