In addition to accepting lines with one or more commits, it now
accepts lines with precisely two trees.
When diffing trees, the -m, -s, -v, --pretty, --abbrev-commit,
--encoding, --no-commit-id, -c, --cc, and --always options are
ignored, since they do not apply to trees. This is the same behavior
you get when specifying two trees on the command line instead of with
--stdin.
Signed-off-by: Karl Hasselström <kha@xxxxxxxxxxx>
---
Documentation/git-diff-tree.txt | 14 +++++++++-----
builtin-diff-tree.c | 35 +++++++++++++++++++++++++++++++----
2 files changed, 40 insertions(+), 9 deletions(-)
diff --git a/Documentation/git-diff-tree.txt b/Documentation/git-diff-tree.txt
index 1fdf20d..0b1ade8 100644
--- a/Documentation/git-diff-tree.txt
+++ b/Documentation/git-diff-tree.txt
@@ -49,13 +49,17 @@ include::diff-options.txt[]
--stdin::
When '--stdin' is specified, the command does not take
<tree-ish> arguments from the command line. Instead, it
- reads either one <commit> or a list of <commit>
- separated with a single space from its standard input.
+ reads lines containing either two <tree>, one <commit>, or a
+ list of <commit> from its standard input. (Use a single space
+ as separator.)
+
-When a single commit is given on one line of such input, it compares
-the commit with its parents. The following flags further affects its
-behavior. The remaining commits, when given, are used as if they are
+When two trees are given, it compares the first tree with the second.
+When a single commit is given, it compares the commit with its
+parents. The remaining commits, when given, are used as if they are
parents of the first commit.
++
+The following flags further affects the behavior when comparing
+commits (but not trees).
-m::
By default, 'git-diff-tree --stdin' does not show
diff --git a/builtin-diff-tree.c b/builtin-diff-tree.c
index ebbd631..0bdb1cf 100644
--- a/builtin-diff-tree.c
+++ b/builtin-diff-tree.c
@@ -42,21 +42,48 @@ static int stdin_diff_commit(struct commit *commit, char *line, int len)
return log_tree_commit(&log_tree_opt, commit);
}
+/* Diff two trees. */
+static int stdin_diff_trees(struct tree *tree1, char *line, int len)
+{
+ unsigned char sha1[20];
+ struct tree *tree2;
+ if (len != 82 || !isspace(line[40]) || get_sha1_hex(line + 41, sha1)) {
+ error("Need precisely two trees, separated by one space");
+ return -1;
+ }
+ tree2 = lookup_tree(sha1);
+ if (!tree2 || parse_tree(tree2))
+ return -1;
+ printf("%s %s\n", sha1_to_hex(tree1->object.sha1),
+ sha1_to_hex(tree2->object.sha1));
+ diff_tree_sha1(tree1->object.sha1, tree2->object.sha1,
+ "", &log_tree_opt.diffopt);
+ log_tree_diff_flush(&log_tree_opt);
+ return 0;
+}
+
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
unsigned char sha1[20];
- struct commit *commit;
+ struct object *obj;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
if (get_sha1_hex(line, sha1))
return -1;
- commit = lookup_commit(sha1);
- if (!commit || parse_commit(commit))
+ obj = lookup_object(sha1);
+ obj = obj ? obj : parse_object(sha1);
+ if (!obj)
return -1;
- return stdin_diff_commit(commit, line, len);
+ if (obj->type == OBJ_COMMIT)
+ return stdin_diff_commit((struct commit *)obj, line, len);
+ if (obj->type == OBJ_TREE)
+ return stdin_diff_trees((struct tree *)obj, line, len);
+ error("Object %s is a %s, not a commit or tree",
+ sha1_to_hex(sha1), typename(obj->type));
+ return -1;
}
static const char diff_tree_usage[] =
--
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