static int no_commit_id = 0;
static int verbose_header = 0;
static int ignore_merges = 1;
+static int combine_merges = 0;
+static int dense_combined_merges = 0;
static int read_stdin = 0;
+static int always_show_header = 0;
static const char *header = NULL;
static const char *header_prefix = "";
static struct diff_options diff_options;
-static void call_diff_setup_done(void)
-{
- diff_setup_done(&diff_options);
-}
-
static int call_diff_flush(void)
{
diffcore_std(&diff_options);
{
int ret;
- call_diff_setup_done();
ret = diff_tree_sha1(old, new, base, &diff_options);
call_diff_flush();
return ret;
void *tree;
struct tree_desc empty, real;
- call_diff_setup_done();
tree = read_object_with_reference(new, "tree", &real.size, NULL);
if (!tree)
die("unable to read root tree (%s)", sha1_to_hex(new));
return retval;
}
-static const char *generate_header(const char *commit, const char *parent, const char *msg, unsigned long len)
+static const char *generate_header(const unsigned char *commit_sha1,
+ const unsigned char *parent_sha1,
+ const struct commit *commit)
{
static char this_header[16384];
int offset;
+ unsigned long len;
+ int abbrev = diff_options.abbrev;
+ const char *msg = commit->buffer;
if (!verbose_header)
- return commit;
-
- offset = sprintf(this_header, "%s%s (from %s)\n", header_prefix, commit, parent);
- offset += pretty_print_commit(commit_format, msg, len, this_header + offset, sizeof(this_header) - offset);
+ return sha1_to_hex(commit_sha1);
+
+ len = strlen(msg);
+
+ offset = sprintf(this_header, "%s%s ",
+ header_prefix,
+ diff_unique_abbrev(commit_sha1, abbrev));
+ if (commit_sha1 != parent_sha1)
+ offset += sprintf(this_header + offset, "(from %s)\n",
+ parent_sha1
+ ? diff_unique_abbrev(parent_sha1, abbrev)
+ : "root");
+ else
+ offset += sprintf(this_header + offset, "(from parents)\n");
+ offset += pretty_print_commit(commit_format, commit, len,
+ this_header + offset,
+ sizeof(this_header) - offset, abbrev);
+ if (always_show_header) {
+ puts(this_header);
+ return NULL;
+ }
return this_header;
}
-static int diff_tree_commit(const unsigned char *commit, const char *name)
+static int diff_tree_commit(struct commit *commit)
{
- unsigned long size, offset;
- char *buf = read_object_with_reference(commit, "commit", &size, NULL);
-
- if (!buf)
- return -1;
-
- if (!name) {
- static char commit_name[60];
- strcpy(commit_name, sha1_to_hex(commit));
- name = commit_name;
- }
+ struct commit_list *parents;
+ unsigned const char *sha1 = commit->object.sha1;
/* Root commit? */
- if (show_root_diff && memcmp(buf + 46, "parent ", 7)) {
- header = generate_header(name, "root", buf, size);
- diff_root_tree(commit, "");
+ if (show_root_diff && !commit->parents) {
+ header = generate_header(sha1, NULL, commit);
+ diff_root_tree(sha1, "");
}
/* More than one parent? */
- if (ignore_merges) {
- if (!memcmp(buf + 46 + 48, "parent ", 7))
+ if (commit->parents && commit->parents->next) {
+ if (ignore_merges)
return 0;
+ else if (combine_merges) {
+ header = generate_header(sha1, sha1, commit);
+ header = diff_tree_combined_merge(sha1, header,
+ dense_combined_merges,
+ &diff_options);
+ if (!header && verbose_header)
+ header_prefix = "\ndiff-tree ";
+ return 0;
+ }
}
- offset = 46;
- while (offset + 48 < size && !memcmp(buf + offset, "parent ", 7)) {
- unsigned char parent[20];
- if (get_sha1_hex(buf + offset + 7, parent))
- return -1;
- header = generate_header(name, sha1_to_hex(parent), buf, size);
- diff_tree_sha1_top(parent, commit, "");
+ for (parents = commit->parents; parents; parents = parents->next) {
+ struct commit *parent = parents->item;
+ header = generate_header(sha1, parent->object.sha1, commit);
+ diff_tree_sha1_top(parent->object.sha1, sha1, "");
if (!header && verbose_header) {
header_prefix = "\ndiff-tree ";
/*
* don't print the diffs.
*/
}
- offset += 48;
}
- free(buf);
return 0;
}
+static int diff_tree_commit_sha1(const unsigned char *sha1)
+{
+ struct commit *commit = lookup_commit_reference(sha1);
+ if (!commit)
+ return -1;
+ return diff_tree_commit(commit);
+}
+
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
- unsigned char commit[20], parent[20];
- static char this_header[1000];
+ unsigned char sha1[20];
+ struct commit *commit;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
- if (get_sha1_hex(line, commit))
+ if (get_sha1_hex(line, sha1))
+ return -1;
+ commit = lookup_commit(sha1);
+ if (!commit || parse_commit(commit))
return -1;
- if (isspace(line[40]) && !get_sha1_hex(line+41, parent)) {
- line[40] = 0;
- line[81] = 0;
- sprintf(this_header, "%s (from %s)\n", line, line+41);
- header = this_header;
- return diff_tree_sha1_top(parent, commit, "");
+ if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
+ /* Graft the fake parents locally to the commit */
+ int pos = 41;
+ struct commit_list **pptr, *parents;
+
+ /* Free the real parent list */
+ for (parents = commit->parents; parents; ) {
+ struct commit_list *tmp = parents->next;
+ free(parents);
+ parents = tmp;
+ }
+ commit->parents = NULL;
+ pptr = &(commit->parents);
+ while (line[pos] && !get_sha1_hex(line + pos, sha1)) {
+ struct commit *parent = lookup_commit(sha1);
+ if (parent) {
+ pptr = &commit_list_insert(parent, pptr)->next;
+ }
+ pos += 41;
+ }
}
- line[40] = 0;
- return diff_tree_commit(commit, line);
+ return diff_tree_commit(commit);
}
static const char diff_tree_usage[] =
-"git-diff-tree [--stdin] [-m] [-s] [-v] [--pretty] [-t] [-r] [--root] "
+"git-diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
"[<common diff options>] <tree-ish> [<tree-ish>] [<path>...]\n"
" -r diff recursively\n"
" --root include the initial commit as diff against /dev/null\n"
ignore_merges = 0;
continue;
}
+ if (!strcmp(arg, "-c")) {
+ combine_merges = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--cc")) {
+ dense_combined_merges = combine_merges = 1;
+ continue;
+ }
if (!strcmp(arg, "-v")) {
verbose_header = 1;
header_prefix = "diff-tree ";
no_commit_id = 1;
continue;
}
+ if (!strcmp(arg, "--always")) {
+ always_show_header = 1;
+ continue;
+ }
usage(diff_tree_usage);
}
+
+ if (combine_merges)
+ ignore_merges = 0;
+
+ /* We can only do dense combined merges with diff output */
+ if (dense_combined_merges)
+ diff_options.output_format = DIFF_FORMAT_PATCH;
+
if (diff_options.output_format == DIFF_FORMAT_PATCH)
diff_options.recursive = 1;
diff_tree_setup_paths(get_pathspec(prefix, argv));
+ diff_setup_done(&diff_options);
switch (nr_sha1) {
case 0:
usage(diff_tree_usage);
break;
case 1:
- diff_tree_commit(sha1[0], NULL);
+ diff_tree_commit_sha1(sha1[0]);
break;
case 2:
diff_tree_sha1_top(sha1[0], sha1[1], "");