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merge-recursive: option to specify rename threshold 

The recursive merge strategy turns on rename detection but leaves the
rename threshold at the default. Add a strategy option to allow the user
to specify a rename threshold to use.

Signed-off-by: Kevin Ballard <kevin@sb.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Kevin Ballard 2010-09-27 16:58:25 -07:00 committed by Junio C Hamano
parent 4e5dd044c6
commit 10ae7526be
5 changed files with 16 additions and 3 deletions
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4
Documentation/merge-strategies.txt
View File

@ -74,6 +74,10 @@ no-renormalize;;
Disables the `renormalize` option. This overrides the
`merge.renormalize` configuration variable.
rename-threshold=<n>;;
Controls the similarity threshold used for rename detection.
See also linkgit:git-diff[1] `-M`.
subtree[=path];;
This option is a more advanced form of 'subtree' strategy, where
the strategy makes a guess on how two trees must be shifted to

6
diff.c
View File

@ -3219,7 +3219,7 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
return 1;
}
static int parse_num(const char **cp_p)
int parse_rename_score(const char **cp_p)
{
unsigned long num, scale;
int ch, dot;
@ -3265,7 +3265,7 @@ static int diff_scoreopt_parse(const char *opt)
if (cmd != 'M' && cmd != 'C' && cmd != 'B')
return -1; /* that is not a -M, -C nor -B option */
opt1 = parse_num(&opt);
opt1 = parse_rename_score(&opt);
if (cmd != 'B')
opt2 = 0;
else {
@ -3275,7 +3275,7 @@ static int diff_scoreopt_parse(const char *opt)
return -1; /* we expect -B80/99 or -B80 */
else {
opt++;
opt2 = parse_num(&opt);
opt2 = parse_rename_score(&opt);
}
}
if (*opt != 0)

2
diff.h
View File

@ -301,4 +301,6 @@ extern size_t fill_textconv(struct userdiff_driver *driver,
extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
extern int parse_rename_score(const char **cp_p);
#endif /* DIFF_H */

6
merge-recursive.c
View File

@ -339,6 +339,7 @@ static struct string_list *get_renames(struct merge_options *o,
opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit :
o->diff_rename_limit >= 0 ? o->diff_rename_limit :
500;
opts.rename_score = o->rename_score;
opts.warn_on_too_large_rename = 1;
opts.output_format = DIFF_FORMAT_NO_OUTPUT;
if (diff_setup_done(&opts) < 0)
@ -1525,6 +1526,11 @@ int parse_merge_opt(struct merge_options *o, const char *s)
o->renormalize = 1;
else if (!strcmp(s, "no-renormalize"))
o->renormalize = 0;
else if (!prefixcmp(s, "rename-threshold=")) {
const char *score = s + strlen("rename-threshold=");
if ((o->rename_score = parse_rename_score(&score)) == -1 || *score != 0)
return -1;
}
else
return -1;
return 0;

1
merge-recursive.h
View File

@ -19,6 +19,7 @@ struct merge_options {
int verbosity;
int diff_rename_limit;
int merge_rename_limit;
int rename_score;
int call_depth;
struct strbuf obuf;
struct string_list current_file_set;