git/list[1] front-page[2] threads[3] people[4] search[5] about
 

[PATCH 10/15] handle_revision_arg: record modes for "a..b" endpoints

From
Jeff King <peff@peff.net>
Date
May 19, 2017, 12:55 UTC
Message-ID
<20170519125511.uz7hsdalem57n77d@sigill.intra.peff.net>
In-Reply-To
<20170519124651.4q7waz75rmzfopgn@sigill.intra.peff.net>

The "a..b" revision syntax was designed to handle commits, so it doesn't bother to record any mode we find while traversing a "tree:path" endpoint. These days "git diff" can diff blobs using either "a:path..b:path" (with dots) or "a:path b:path" (without), but the two behave inconsistently, as the with-dots version fails to notice the mode.

Let's teach the dot-dot range parser to record modes; it doesn't cost us anything, and it makes this case work.

Signed-off-by: Jeff King <peff@peff.net>
---
 revision.c            | 10 ++++++----
 t/t4063-diff-blobs.sh |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/revision.c b/revision.c
index eb45501fd..96427e3c2 100644
--- a/revision.c
+++ b/revision.c
@@ -1448,9 +1448,11 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
 	const char *a_name, *b_name;
 	struct object_id a_oid, b_oid;
 	struct object *a_obj, *b_obj;
+	struct object_context a_oc, b_oc;
 	unsigned int a_flags, b_flags;
 	int symmetric = 0;
 	unsigned int flags_exclude = flags ^ (UNINTERESTING | BOTTOM);
+	unsigned int oc_flags = GET_SHA1_COMMITTISH;
 
 	a_name = arg;
 	if (!*a_name)
@@ -1464,8 +1466,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
 	if (!*b_name)
 		b_name = "HEAD";
 
-	if (get_sha1_committish(a_name, a_oid.hash) ||
-	    get_sha1_committish(b_name, b_oid.hash))
+	if (get_sha1_with_context(a_name, oc_flags, a_oid.hash, &a_oc) ||
+	    get_sha1_with_context(b_name, oc_flags, b_oid.hash, &b_oc))
 		return -1;
 
 	if (!cant_be_filename) {
@@ -1507,8 +1509,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
 	b_obj->flags |= b_flags;
 	add_rev_cmdline(revs, a_obj, a_name, REV_CMD_LEFT, a_flags);
 	add_rev_cmdline(revs, b_obj, b_name, REV_CMD_RIGHT, b_flags);
-	add_pending_object(revs, a_obj, a_name);
-	add_pending_object(revs, b_obj, b_name);
+	add_pending_object_with_mode(revs, a_obj, a_name, a_oc.mode);
+	add_pending_object_with_mode(revs, b_obj, b_name, b_oc.mode);
 	return 0;
 }
 
diff --git a/t/t4063-diff-blobs.sh b/t/t4063-diff-blobs.sh
index 90c6f6b85..df9c35b2d 100755
--- a/t/t4063-diff-blobs.sh
+++ b/t/t4063-diff-blobs.sh
@@ -71,7 +71,7 @@ test_expect_success 'index of ranged tree:path diff' '
 test_expect_failure 'ranged tree:path diff uses filenames as paths' '
 	check_paths one two
 '
-test_expect_failure 'ranged tree:path diff shows mode change' '
+test_expect_success 'ranged tree:path diff shows mode change' '
 	check_mode 100644 100755
 '
 
-- 
2.13.0.219.g63f6bc368
Previous: Jeff KingNext: Jeff King
Message 26 of 33 in “Demonstrate and partially work around a gitattributes problem”
  1. 0/2 Demonstrate and partially work around a gitattributes problemJohannes Schindelin, May 15, 2017
  2. 1/2 gitattributes: demonstrate that Git tries to read a bogus fileJohannes Schindelin, May 15, 2017
  3. 2/2 mingw: Suppress warning that <commit>:.gitattributes does not existJohannes Schindelin, May 15, 2017
  4. Jeff KingMay 16, 2017
  5. Jeff KingMay 16, 2017
  6. Junio C HamanoMay 17, 2017
  7. Jeff KingMay 17, 2017
  8. Johannes SchindelinMay 18, 2017
  9. Jeff KingMay 19, 2017
  10. 0/15 retain blob info for git diff HEAD:foo HEAD:barJeff King, May 19, 2017
  11. 01/15 handle_revision_arg: reset "dotdot" consistentlyJeff King, May 19, 2017
  12. Philip OakleyMay 20, 2017
  13. Jeff KingMay 23, 2017
  14. Philip OakleyMay 23, 2017
  15. 02/15 handle_revision_arg: simplify commit reference lookupsJeff King, May 19, 2017
  16. 03/15 handle_revision_arg: stop using "dotdot" as a generic pointerJeff King, May 19, 2017
  17. Junio C HamanoMay 24, 2017
  18. Jeff KingMay 24, 2017
  19. 04/15 handle_revision_arg: hoist ".." check out of range parsingJeff King, May 19, 2017
  20. 05/15 handle_revision_arg: add handle_dotdot() helperJeff King, May 19, 2017
  21. Junio C HamanoMay 24, 2017
  22. 06/15 sha1_name: consistently refer to object_context as "oc"Jeff King, May 19, 2017
  23. 07/15 get_sha1_with_context: always initialize oc->symlink_pathJeff King, May 19, 2017
  24. 08/15 get_sha1_with_context: dynamically allocate oc->pathJeff King, May 19, 2017
  25. 09/15 t4063: add tests of direct blob diffsJeff King, May 19, 2017
  26. 10/15 handle_revision_arg: record modes for "a..b" endpointsJeff King, May 19, 2017
  27. 11/15 handle_revision_arg: record paths for pending objectsJeff King, May 19, 2017
  28. 12/15 diff: pass whole pending entry in blobinfoJeff King, May 19, 2017
  29. 13/15 diff: use the word "path" instead of "name" for blobsJeff King, May 19, 2017
  30. 14/15 diff: use pending "path" if it is availableJeff King, May 19, 2017
  31. 15/15 diff: use blob path for blob/file diffsJeff King, May 19, 2017
  32. Junio C HamanoMay 24, 2017
  33. Jeff KingMay 24, 2017

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.