[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>
diff --git a/diffcore.h b/diffcore.h
index 5fa7067..c3809ef 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -38,7 +38,7 @@
extern int diff_populate_filespec(struct diff_filespec *);
extern void diff_free_filespec_data(struct diff_filespec *);
-struct diff_file_pair {
+struct diff_filepair {
struct diff_filespec *one;
struct diff_filespec *two;
char *xfrm_msg;
@@ -47,14 +47,15 @@
};
struct diff_queue_struct {
- struct diff_file_pair **queue;
+ struct diff_filepair **queue;
int alloc;
int nr;
};
-extern struct diff_file_pair *diff_queue(struct diff_queue_struct *,
- struct diff_filespec *,
- struct diff_filespec *);
+extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
+ struct diff_filespec *,
+ struct diff_filespec *);
extern void diff_detect_rename(struct diff_queue_struct *, int, int);
+extern void diff_pickaxe(struct diff_queue_struct *, const char *);
#endif
