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built-in diff: assorted updates.

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"git diff(n)" without --base, --ours, etc. defaults to --cc,
which usually is the same as -p unless you are in the middle of
a conflicted merge, just like the shell script version.

"git diff(n) blobA blobB path" complains and dies.

"git diff(n) tree0 tree1 tree2...treeN" does combined diff that
shows a merge of tree1..treeN to result in tree0.

Giving "-c" option to any command that defaults to "--cc" turns
off dense-combined flag.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
2006-04-29 01:24:49 -07:00
parent 65056021f2
commit 0fe7c1de16
4 changed files with 79 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
combine-diff.c
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@ -831,15 +831,16 @@ void show_combined_diff(struct combine_diff_path *p,
}
}
void diff_tree_combined_merge(const unsigned char *sha1,
int dense, struct rev_info *rev)
void diff_tree_combined(const unsigned char *sha1,
const unsigned char parent[][20],
int num_parent,
int dense,
struct rev_info *rev)
{
struct diff_options *opt = &rev->diffopt;
struct commit *commit = lookup_commit(sha1);
struct diff_options diffopts;
struct commit_list *parents;
struct combine_diff_path *p, *paths = NULL;
int num_parent, i, num_paths;
int i, num_paths;
int do_diffstat;
do_diffstat = (opt->output_format == DIFF_FORMAT_DIFFSTAT ||
@ -849,17 +850,8 @@ void diff_tree_combined_merge(const unsigned char *sha1,
diffopts.with_stat = 0;
diffopts.recursive = 1;
/* count parents */
for (parents = commit->parents, num_parent = 0;
parents;
parents = parents->next, num_parent++)
; /* nothing */
/* find set of paths that everybody touches */
for (parents = commit->parents, i = 0;
parents;
parents = parents->next, i++) {
struct commit *parent = parents->item;
for (i = 0; i < num_parent; i++) {
/* show stat against the first parent even
* when doing combined diff.
*/
@ -867,8 +859,7 @@ void diff_tree_combined_merge(const unsigned char *sha1,
diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
else
diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
diff_tree_sha1(parent->object.sha1, commit->object.sha1, "",
&diffopts);
diff_tree_sha1(parent[i], sha1, "", &diffopts);
diffcore_std(&diffopts);
paths = intersect_paths(paths, i, num_parent);
@ -907,3 +898,25 @@ void diff_tree_combined_merge(const unsigned char *sha1,
free(tmp);
}
}
void diff_tree_combined_merge(const unsigned char *sha1,
int dense, struct rev_info *rev)
{
int num_parent;
const unsigned char (*parent)[20];
struct commit *commit = lookup_commit(sha1);
struct commit_list *parents;
/* count parents */
for (parents = commit->parents, num_parent = 0;
parents;
parents = parents->next, num_parent++)
; /* nothing */
parent = xmalloc(num_parent * sizeof(*parent));
for (parents = commit->parents, num_parent = 0;
parents;
parents = parents->next, num_parent++)
memcpy(parent + num_parent, parents->item->object.sha1, 20);
diff_tree_combined(sha1, parent, num_parent, dense, rev);
}