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diffcore-rename: fall back to -C when -C -C busts the rename limit

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When there are too many paths in the project, the number of rename source
candidates "git diff -C -C" finds will exceed the rename detection limit,
and no inexact rename detection is performed.  We however could fall back
to "git diff -C" if the number of modified paths is sufficiently small.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2011-01-06 13:50:06 -08:00
parent e88d6bc6f9
commit f31027c99c
7 changed files with 112 additions and 10 deletions
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12
builtin/diff-tree.c
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@ -163,6 +163,9 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
}
if (read_stdin) {
int saved_nrl = 0;
int saved_dcctc = 0;
if (opt->diffopt.detect_rename)
opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
@ -173,9 +176,16 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
fputs(line, stdout);
fflush(stdout);
}
else
else {
diff_tree_stdin(line);
if (saved_nrl < opt->diffopt.needed_rename_limit)
saved_nrl = opt->diffopt.needed_rename_limit;
if (opt->diffopt.degraded_cc_to_c)
saved_dcctc = 1;
}
}
opt->diffopt.degraded_cc_to_c = saved_dcctc;
opt->diffopt.needed_rename_limit = saved_nrl;
}
return diff_result_code(&opt->diffopt, 0);