5 static int show_root_diff = 0;
6 static int no_commit_id = 0;
7 static int verbose_header = 0;
8 static int ignore_merges = 1;
9 static int combine_merges = 0;
10 static int dense_combined_merges = 0;
11 static int read_stdin = 0;
12 static int always_show_header = 0;
14 static const char *header = NULL;
15 static const char *header_prefix = "";
16 static enum cmit_fmt commit_format = CMIT_FMT_RAW;
18 static struct diff_options diff_options;
20 static int call_diff_flush(void)
22 diffcore_std(&diff_options);
23 if (diff_queue_is_empty()) {
24 int saved_fmt = diff_options.output_format;
25 diff_options.output_format = DIFF_FORMAT_NO_OUTPUT;
26 diff_flush(&diff_options);
27 diff_options.output_format = saved_fmt;
32 printf("%s%c", header, diff_options.line_termination);
35 diff_flush(&diff_options);
39 static int diff_tree_sha1_top(const unsigned char *old,
40 const unsigned char *new, const char *base)
44 ret = diff_tree_sha1(old, new, base, &diff_options);
49 static int diff_root_tree(const unsigned char *new, const char *base)
53 struct tree_desc empty, real;
55 tree = read_object_with_reference(new, "tree", &real.size, NULL);
57 die("unable to read root tree (%s)", sha1_to_hex(new));
62 retval = diff_tree(&empty, &real, base, &diff_options);
68 static const char *generate_header(const unsigned char *commit_sha1,
69 const unsigned char *parent_sha1,
70 const struct commit *commit)
72 static char this_header[16384];
75 int abbrev = diff_options.abbrev;
76 const char *msg = commit->buffer;
79 return sha1_to_hex(commit_sha1);
83 offset = sprintf(this_header, "%s%s ",
85 diff_unique_abbrev(commit_sha1, abbrev));
86 if (commit_sha1 != parent_sha1)
87 offset += sprintf(this_header + offset, "(from %s)\n",
89 ? diff_unique_abbrev(parent_sha1, abbrev)
92 offset += sprintf(this_header + offset, "(from parents)\n");
93 offset += pretty_print_commit(commit_format, commit, len,
95 sizeof(this_header) - offset, abbrev);
96 if (always_show_header) {
103 static int diff_tree_commit(const unsigned char *commit_sha1)
105 struct commit *commit;
106 struct commit_list *parents;
108 unsigned char sha1[20];
110 sprintf(name, "%s^0", sha1_to_hex(commit_sha1));
111 if (get_sha1(name, sha1))
114 commit = lookup_commit(sha1);
117 if (show_root_diff && !commit->parents) {
118 header = generate_header(sha1, NULL, commit);
119 diff_root_tree(commit_sha1, "");
122 /* More than one parent? */
123 if (commit->parents && commit->parents->next) {
126 else if (combine_merges) {
127 header = generate_header(sha1, sha1, commit);
128 return diff_tree_combined_merge(sha1, header,
129 dense_combined_merges);
133 for (parents = commit->parents; parents; parents = parents->next) {
134 struct commit *parent = parents->item;
135 header = generate_header(sha1, parent->object.sha1, commit);
136 diff_tree_sha1_top(parent->object.sha1, commit_sha1, "");
137 if (!header && verbose_header) {
138 header_prefix = "\ndiff-tree ";
140 * Don't print multiple merge entries if we
141 * don't print the diffs.
148 static int diff_tree_stdin(char *line)
150 int len = strlen(line);
151 unsigned char commit[20], parent[20];
152 static char this_header[1000];
153 int abbrev = diff_options.abbrev;
155 if (!len || line[len-1] != '\n')
158 if (get_sha1_hex(line, commit))
160 if (isspace(line[40]) && !get_sha1_hex(line+41, parent)) {
163 sprintf(this_header, "%s (from %s)\n",
164 diff_unique_abbrev(commit, abbrev),
165 diff_unique_abbrev(parent, abbrev));
166 header = this_header;
167 return diff_tree_sha1_top(parent, commit, "");
170 return diff_tree_commit(commit);
173 static const char diff_tree_usage[] =
174 "git-diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
175 "[<common diff options>] <tree-ish> [<tree-ish>] [<path>...]\n"
176 " -r diff recursively\n"
177 " --root include the initial commit as diff against /dev/null\n"
178 COMMON_DIFF_OPTIONS_HELP;
180 int main(int argc, const char **argv)
184 unsigned char sha1[2][20];
185 const char *prefix = setup_git_directory();
187 git_config(git_diff_config);
189 diff_setup(&diff_options);
202 if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
209 diff_opt_cnt = diff_opt_parse(&diff_options, argv, argc);
210 if (diff_opt_cnt < 0)
211 usage(diff_tree_usage);
212 else if (diff_opt_cnt) {
213 argv += diff_opt_cnt - 1;
214 argc -= diff_opt_cnt - 1;
219 if (!strcmp(arg, "--")) {
224 if (!strcmp(arg, "-r")) {
225 diff_options.recursive = 1;
228 if (!strcmp(arg, "-t")) {
229 diff_options.recursive = 1;
230 diff_options.tree_in_recursive = 1;
233 if (!strcmp(arg, "-m")) {
237 if (!strcmp(arg, "-c")) {
241 if (!strcmp(arg, "--cc")) {
242 dense_combined_merges = combine_merges = 1;
245 if (!strcmp(arg, "-v")) {
247 header_prefix = "diff-tree ";
250 if (!strncmp(arg, "--pretty", 8)) {
252 header_prefix = "diff-tree ";
253 commit_format = get_commit_format(arg+8);
256 if (!strcmp(arg, "--stdin")) {
260 if (!strcmp(arg, "--root")) {
264 if (!strcmp(arg, "--no-commit-id")) {
268 if (!strcmp(arg, "--always")) {
269 always_show_header = 1;
272 usage(diff_tree_usage);
274 if (diff_options.output_format == DIFF_FORMAT_PATCH)
275 diff_options.recursive = 1;
277 if (combine_merges) {
278 diff_options.output_format = DIFF_FORMAT_PATCH;
282 diff_tree_setup_paths(get_pathspec(prefix, argv));
283 diff_setup_done(&diff_options);
288 usage(diff_tree_usage);
291 diff_tree_commit(sha1[0]);
294 diff_tree_sha1_top(sha1[0], sha1[1], "");
301 if (diff_options.detect_rename)
302 diff_options.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
303 DIFF_SETUP_USE_CACHE);
304 while (fgets(line, sizeof(line), stdin))
305 diff_tree_stdin(line);