Hi!
I've been working on detecting revisions where a "real" deletion was
made and I think I advanced a lot in that front. I still have to work
on many scenarios (renamed files, for example... also performance) but
at least I'm using a few runs against git-scm history and the results
are "promising":
23:05 $ git blame -s --reverse -L 25,40 HEAD~20..HEAD -- versioncmp.c
066fb0494e 25) static int initialized;
066fb0494e 26)
066fb0494e 27) /*
8ec68d1ae2 28) * p1 and p2 point to the first different character in
two strings. If
8ec68d1ae2 29) * either p1 or p2 starts with a prerelease suffix, it
will be forced
8ec68d1ae2 30) * to be on top.
8ec68d1ae2 31) *
8ec68d1ae2 32) * If both p1 and p2 start with (different) suffix, the order is
8ec68d1ae2 33) * determined by config file.
066fb0494e 34) *
8ec68d1ae2 35) * Note that we don't have to deal with the situation
when both p1 and
8ec68d1ae2 36) * p2 start with the same suffix because the common
part is already
8ec68d1ae2 37) * consumed by the caller.
066fb0494e 38) *
066fb0494e 39) * Return non-zero if *diff contains the return value
for versioncmp()
066fb0494e 40) */
Lines 28-33:
23:05 $ git show --summary 8ec68d1ae2
commit 8ec68d1ae2863823b74d67c5e92297e38bbf97bc
Merge: e801be066 c48886779
Author: Junio C Hamano <>
Date: Mon Jan 23 15:59:21 2017 -0800
Merge branch 'vn/diff-ihc-config'
"git diff" learned diff.interHunkContext configuration variable
that gives the default value for its --inter-hunk-context option.
* vn/diff-ihc-config:
diff: add interhunk context config option
And this is not telling me the _real_ revision where the lines were
_deleted_ so it's not very helpful, as Peff has already mentioned.
Running difflame:
23:06 $ time ~/proyectos/git/difflame/difflame.py -bp=-s -w HEAD~20
HEAD -- versioncmp.c
diff --git a/versioncmp.c b/versioncmp.c
index 80bfd109f..9f81dc106 100644
--- a/versioncmp.c
+++ b/versioncmp.c
@@ -24,42 +24,83 @@
.
.
.
+b17846432d 33) static void find_better_matching_suffix(const char
*tagname, const char *suffix,
+b17846432d 34) int
suffix_len, int start, int conf_pos,
+b17846432d 35) struct
suffix_match *match)
+b17846432d 36) {
b17846432d 37) /*
c026557a3 versioncmp: generalize version sort suffix reordering
-c026557a3 (SZEDER 28) * p1 and p2 point to the first different
character in two strings. If
-c026557a3 (SZEDER 29) * either p1 or p2 starts with a prerelease
suffix, it will be forced
-c026557a3 (SZEDER 30) * to be on top.
-c026557a3 (SZEDER 31) *
-c026557a3 (SZEDER 32) * If both p1 and p2 start with (different)
suffix, the order is
-c026557a3 (SZEDER 33) * determined by config file.
b17846432 versioncmp: factor out helper for suffix matching
+b17846432d 38) * A better match either starts earlier or
starts at the same offset
+b17846432d 39) * but is longer.
+b17846432d 40) */
+b17846432d 41) int end = match->len < suffix_len ?
match->start : match->start-1;
.
.
.
Same range of (deleted) lines:
23:10 $ git --show --name-status c026557a3
commit c026557a37361b7019acca28f240a19f546739e9
Author: SZEDER Gábor <>
Date: Thu Dec 8 15:24:01 2016 +0100
versioncmp: generalize version sort suffix reordering
The 'versionsort.prereleaseSuffix' configuration variable, as its name
suggests, is supposed to only deal with tagnames with prerelease
.
.
.
Signed-off-by: SZEDER Gábor <>
Signed-off-by: Junio C Hamano <>
M Documentation/config.txt
M Documentation/git-tag.txt
M t/t7004-tag.sh
M versioncmp.c
This is the revision where the deletion happened.
That's it for the time being.