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git log: add '--merges' flag to match '--no-merges'

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I do various statistics on git, and one of the things I look at is merges,
because they are often interesting events to count ("how many merges vs
how much 'real development'" kind of statistics). And you can do it with
some fairly straightforward scripting, ie

	git rev-list --parents HEAD |
		grep ' .* ' |
		git diff-tree --always -s --pretty=oneline --stdin |
		less -S

will do it.

But I finally got irritated with the fact that we can skip merges with
'--no-merges', but we can't do the trivial reverse operation.

So this just adds a '--merges' flag that _only_ shows merges. Now you can
do the above with just a

	git log --merges --pretty=oneline

which is a lot simpler. It also means that we automatically get a lot of
statistics for free, eg

	git shortlog -ns --merges

does exactly what you'd want it to do.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Linus Torvalds 2009-06-29 10:28:25 -07:00 committed by Junio C Hamano
parent 4f2b15ce88
commit b8e8db281c
2 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
revision.c
View File

@ -1077,6 +1077,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
revs->show_all = 1;
} else if (!strcmp(arg, "--remove-empty")) {
revs->remove_empty_trees = 1;
} else if (!strcmp(arg, "--merges")) {
revs->merges_only = 1;
} else if (!strcmp(arg, "--no-merges")) {
revs->no_merges = 1;
} else if (!strcmp(arg, "--boundary")) {
@ -1676,6 +1678,8 @@ enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
return commit_ignore;
if (revs->no_merges && commit->parents && commit->parents->next)
return commit_ignore;
if (revs->merges_only && !(commit->parents && commit->parents->next))
return commit_ignore;
if (!commit_match(commit, revs))
return commit_ignore;
if (revs->prune && revs->dense) {

1
revision.h
View File

@ -36,6 +36,7 @@ struct rev_info {
unsigned int dense:1,
prune:1,
no_merges:1,
merges_only:1,
no_walk:1,
show_all:1,
remove_empty_trees:1,