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[PATCH] Introducing software archaeologist's tool "pickaxe".

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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>
This commit is contained in:
Junio C Hamano
2005-05-21 02:40:01 -07:00
committed by Linus Torvalds
parent 427dcb4bca
commit 52e9578985
14 changed files with 140 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
diff-files.c
View File

@ -7,13 +7,14 @@
#include "diff.h"
static const char *diff_files_usage =
"git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [paths...]";
"git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [paths...]";
static int generate_patch = 0;
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;
static int silent = 0;
static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
@ -67,6 +68,8 @@ int main(int argc, char **argv)
line_termination = 0;
else if (!strcmp(argv[1], "-R"))
reverse_diff = 1;
else if (!strcmp(argv[1], "-S"))
pickaxe = argv[1] + 2;
else if (!strncmp(argv[1], "-M", 2)) {
diff_score_opt = diff_scoreopt_parse(argv[1]);
detect_rename = generate_patch = 1;
@ -89,8 +92,8 @@ int main(int argc, char **argv)
exit(1);
}
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);
for (i = 0; i < entries; i++) {