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authorJunio C Hamano <junkio@cox.net>2005-05-21 09:40:01 (GMT)
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-21 16:58:03 (GMT)
commit52e9578985fb636ec1d3f6cf794fdadd5ec896fc (patch)
treebb22f522116f5d8e6ae677b7a4660e959c052fc2 /diff-tree.c
parent427dcb4bca49117664d9428fd4e86483f516d703 (diff)
downloadgit-52e9578985fb636ec1d3f6cf794fdadd5ec896fc.zip
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[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-tree.c')
-rw-r--r--diff-tree.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/diff-tree.c b/diff-tree.c
index aa49446..233a250 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -13,6 +13,7 @@ static int generate_patch = 0;
static int detect_rename = 0;
static int reverse_diff = 0;
static int diff_score_opt = 0;
+static char *pickaxe = 0;
static const char *header = NULL;
static const char *header_prefix = "";
@@ -271,8 +272,8 @@ static int diff_tree_sha1_top(const unsigned char *old,
{
int ret;
- 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);
ret = diff_tree_sha1(old, new, base);
diff_flush();
@@ -285,8 +286,8 @@ static int diff_root_tree(const unsigned char *new, const char *base)
void *tree;
unsigned long size;
- 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);
tree = read_object_with_reference(new, "tree", &size, NULL);
if (!tree)
@@ -430,7 +431,7 @@ static int diff_tree_stdin(char *line)
}
static char *diff_tree_usage =
-"git-diff-tree [-p] [-r] [-z] [--stdin] [-M] [-C] [-R] [-m] [-s] [-v] <tree-ish> <tree-ish>";
+"git-diff-tree [-p] [-r] [-z] [--stdin] [-M] [-C] [-R] [-S<string>] [-m] [-s] [-v] <tree-ish> <tree-ish>";
int main(int argc, char **argv)
{
@@ -473,6 +474,10 @@ int main(int argc, char **argv)
recursive = generate_patch = 1;
continue;
}
+ if (!strncmp(arg, "-S", 2)) {
+ pickaxe = arg + 2;
+ continue;
+ }
if (!strncmp(arg, "-M", 2)) {
detect_rename = recursive = generate_patch = 1;
diff_score_opt = diff_scoreopt_parse(arg);