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authorJunio C Hamano <junkio@cox.net>2005-05-21 02:40:01 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-21 09:58:03 -0700
commit52e9578985fb636ec1d3f6cf794fdadd5ec896fc (patch)
treebb22f522116f5d8e6ae677b7a4660e959c052fc2 /diff-cache.c
parent427dcb4bca49117664d9428fd4e86483f516d703 (diff)
downloadgit-52e9578985fb636ec1d3f6cf794fdadd5ec896fc.tar.gz
git-52e9578985fb636ec1d3f6cf794fdadd5ec896fc.tar.xz
[PATCH] Introducing software archaeologist's tool "pickaxe".
This steals the "pickaxe" feature from JIT and make it available to the bare Plumbing layer. From the command line, the user gives a string he is intersted in. Using the diff-core infrastructure previously introduced, it filters the differences to limit the output only to the diffs between <src> and <dst> where the string appears only in one but not in the other. For example: $ ./git-rev-list HEAD | ./git-diff-tree -Sdiff-tree-helper --stdin -M would show the diffs that touch the string "diff-tree-helper". In real software-archaeologist application, you would typically look for a few to several lines of code and see where that code came from. The "pickaxe" module runs after "rename/copy detection" module, so it even crosses the file rename boundary, as the above example demonstrates. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'diff-cache.c')
-rw-r--r--diff-cache.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/diff-cache.c b/diff-cache.c
index 383302abb..a5deb8c7a 100644
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -8,6 +8,7 @@ static int line_termination = '\n';
static int detect_rename = 0;
static int reverse_diff = 0;
static int diff_score_opt = 0;
+static char *pickaxe = 0;
/* A file entry went away or appeared */
static void show_file(const char *prefix, struct cache_entry *ce, unsigned char *sha1, unsigned int mode)
@@ -153,7 +154,7 @@ static void mark_merge_entries(void)
}
static char *diff_cache_usage =
-"git-diff-cache [-p] [-r] [-z] [-m] [-M] [-C] [-R] [--cached] <tree-ish>";
+"git-diff-cache [-p] [-r] [-z] [-m] [-M] [-C] [-R] [-S<string>] [--cached] <tree-ish>";
int main(int argc, char **argv)
{
@@ -194,6 +195,10 @@ int main(int argc, char **argv)
reverse_diff = 1;
continue;
}
+ if (!strcmp(arg, "-S")) {
+ pickaxe = arg + 2;
+ continue;
+ }
if (!strcmp(arg, "-m")) {
match_nonexisting = 1;
continue;
@@ -208,8 +213,8 @@ int main(int argc, char **argv)
if (argc != 2 || get_sha1(argv[1], tree_sha1))
usage(diff_cache_usage);
- diff_setup(detect_rename, diff_score_opt, reverse_diff,
- (generate_patch ? -1 : line_termination),
+ diff_setup(detect_rename, diff_score_opt, pickaxe,
+ reverse_diff, (generate_patch ? -1 : line_termination),
NULL, 0);
mark_merge_entries();