commit-graph: add 'verify' subcommand
authorDerrick Stolee <dstolee@microsoft.com>
Wed, 27 Jun 2018 13:24:32 +0000 (09:24 -0400)
committerJunio C Hamano <gitster@pobox.com>
Wed, 27 Jun 2018 17:27:05 +0000 (10:27 -0700)
commit283e68c72f49e6cfbae53cb5547d5b399ed25d1a
treea6fd95c90d49b9cb99b5d11c1f8e224d2a9a667c
parent0cbef8f8ce6ff434011ecbf3d8d2d41ba6f10c70
commit-graph: add 'verify' subcommand

If the commit-graph file becomes corrupt, we need a way to verify
that its contents match the object database. In the manner of
'git fsck' we will implement a 'git commit-graph verify' subcommand
to report all issues with the file.

Add the 'verify' subcommand to the 'commit-graph' builtin and its
documentation. The subcommand is currently a no-op except for
loading the commit-graph into memory, which may trigger run-time
errors that would be caught by normal use. Add a simple test that
ensures the command returns a zero error code.

If no commit-graph file exists, this is an acceptable state. Do
not report any errors.

Helped-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/git-commit-graph.txt
builtin/commit-graph.c
commit-graph.c
commit-graph.h
t/t5318-commit-graph.sh