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merge-recursive --patience

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Teach the merge-recursive strategy a --patience option to use the
"patience diff" algorithm, which tends to improve results when
cherry-picking a patch that reorders functions at the same time as
refactoring them.

To support this, struct merge_options and ll_merge_options gain an
xdl_opts member, so programs can use arbitrary xdiff flags (think
"XDF_IGNORE_WHITESPACE") in a git-aware merge.

git merge and git rebase can be passed the -Xpatience option to
use this.

[jn: split from --ignore-space patch; with documentation]

Signed-off-by: Justin Frankel <justin@cockos.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Justin Frankel
2010-08-26 00:50:45 -05:00
committed by Junio C Hamano
parent 712516bcac
commit 58a1ece478
6 changed files with 14 additions and 0 deletions
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3
merge-recursive.c
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@ -613,6 +613,7 @@ static int merge_3way(struct merge_options *o,
int merge_status;
ll_opts.renormalize = o->renormalize;
ll_opts.xdl_opts = o->xdl_opts;
if (o->call_depth) {
ll_opts.virtual_ancestor = 1;
@ -1512,6 +1513,8 @@ int parse_merge_opt(struct merge_options *o, const char *s)
o->subtree_shift = "";
else if (!prefixcmp(s, "subtree="))
o->subtree_shift = s + strlen("subtree=");
else if (!strcmp(s, "patience"))
o->xdl_opts |= XDF_PATIENCE_DIFF;
else if (!strcmp(s, "renormalize"))
o->renormalize = 1;
else if (!strcmp(s, "no-renormalize"))