From a7ca65405c364e674cf4359b07ae959d4ece01ab Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Fri, 10 Jun 2005 18:31:02 -0700 Subject: [PATCH] [PATCH] diff-tree: --find-copies-harder Normally, diff-tree does not feed unchanged filepair to diffcore for performance reasons, so copies are detected only when the source file of the copy happens to be modified in the same changeset. This adds --find-copies-harder flag to tell diff-tree to sacrifice the performance in order to find copies the same way as other commands in diff-* family. Signed-off-by: Junio C Hamano Signed-off-by: Linus Torvalds --- diff-tree.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/diff-tree.c b/diff-tree.c index 6c98e62ad..a29c738cb 100644 --- a/diff-tree.c +++ b/diff-tree.c @@ -11,6 +11,7 @@ static int show_tree_entry_in_recursive = 0; static int read_stdin = 0; static int diff_output_format = DIFF_FORMAT_HUMAN; static int detect_rename = 0; +static int find_copies_harder = 0; static int diff_setup_opt = 0; static int diff_score_opt = 0; static const char *pickaxe = NULL; @@ -115,7 +116,7 @@ static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, uns show_file("+", tree2, size2, base); return 1; } - if (!memcmp(sha1, sha2, 20) && mode1 == mode2) + if (!find_copies_harder && !memcmp(sha1, sha2, 20) && mode1 == mode2) return 0; /* @@ -199,7 +200,7 @@ static int interesting(void *tree, unsigned long size, const char *base) static void show_tree(const char *prefix, void *tree, unsigned long size, const char *base) { while (size) { - if (interesting(tree, size, base)) + if (find_copies_harder || interesting(tree, size, base)) show_file(prefix, tree, size, base); update_tree_entry(&tree, &size); } @@ -267,7 +268,7 @@ static void call_diff_setup(void) static int call_diff_flush(void) { - diffcore_std(0, + diffcore_std(find_copies_harder ? paths : 0, detect_rename, diff_score_opt, pickaxe, pickaxe_opts, diff_break_opt, @@ -488,6 +489,10 @@ int main(int argc, const char **argv) usage(diff_tree_usage); continue; } + if (!strcmp(arg, "--find-copies-harder")) { + find_copies_harder = 1; + continue; + } if (!strcmp(arg, "-z")) { diff_output_format = DIFF_FORMAT_MACHINE; continue; @@ -521,6 +526,8 @@ int main(int argc, const char **argv) } usage(diff_tree_usage); } + if (find_copies_harder && detect_rename != DIFF_DETECT_COPY) + usage(diff_tree_usage); if (argc > 0) { int i; -- 2.26.2