diffcore-rename: fall back to -C when -C -C busts the rename limit
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>
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index 0d2a3e9..be6417d 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -163,6 +163,9 @@
}
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 @@
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);
diff --git a/builtin/log.c b/builtin/log.c
index 796e9e5..707fd57 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -247,6 +247,8 @@
static int cmd_log_walk(struct rev_info *rev)
{
struct commit *commit;
+ int saved_nrl = 0;
+ int saved_dcctc = 0;
if (rev->early_output)
setup_early_output(rev);
@@ -277,7 +279,14 @@
}
free_commit_list(commit->parents);
commit->parents = NULL;
+ if (saved_nrl < rev->diffopt.needed_rename_limit)
+ saved_nrl = rev->diffopt.needed_rename_limit;
+ if (rev->diffopt.degraded_cc_to_c)
+ saved_dcctc = 1;
}
+ rev->diffopt.degraded_cc_to_c = saved_dcctc;
+ rev->diffopt.needed_rename_limit = saved_nrl;
+
if (rev->diffopt.output_format & DIFF_FORMAT_CHECKDIFF &&
DIFF_OPT_TST(&rev->diffopt, CHECK_FAILED)) {
return 02;
