#include "cache.h"
#include "diff.h"
#include "commit.h"
+#include "log-tree.h"
-static int show_root_diff = 0;
-static int verbose_header = 0;
-static int ignore_merges = 1;
-static int read_stdin = 0;
+static struct rev_info log_tree_opt;
-static const char *header = NULL;
-static const char *header_prefix = "";
-static enum cmit_fmt commit_format = CMIT_FMT_RAW;
-
-static struct diff_options diff_options;
-
-static void call_diff_setup_done(void)
-{
- diff_setup_done(&diff_options);
-}
-
-static int call_diff_flush(void)
+static int diff_tree_commit_sha1(const unsigned char *sha1)
{
- diffcore_std(&diff_options);
- if (diff_queue_is_empty()) {
- int saved_fmt = diff_options.output_format;
- diff_options.output_format = DIFF_FORMAT_NO_OUTPUT;
- diff_flush(&diff_options);
- diff_options.output_format = saved_fmt;
- return 0;
- }
- if (header) {
- printf("%s%c", header, diff_options.line_termination);
- header = NULL;
- }
- diff_flush(&diff_options);
- return 1;
-}
-
-static int diff_tree_sha1_top(const unsigned char *old,
- const unsigned char *new, const char *base)
-{
- int ret;
-
- call_diff_setup_done();
- ret = diff_tree_sha1(old, new, base, &diff_options);
- call_diff_flush();
- return ret;
-}
-
-static int diff_root_tree(const unsigned char *new, const char *base)
-{
- int retval;
- 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));
- real.buf = tree;
-
- empty.buf = "";
- empty.size = 0;
- retval = diff_tree(&empty, &real, base, &diff_options);
- free(tree);
- call_diff_flush();
- return retval;
-}
-
-static const char *generate_header(const char *commit, const char *parent, const char *msg, unsigned long len)
-{
- static char this_header[16384];
- int offset;
-
- 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 this_header;
-}
-
-static int diff_tree_commit(const unsigned char *commit, const char *name)
-{
- unsigned long size, offset;
- char *buf = read_object_with_reference(commit, "commit", &size, NULL);
-
- if (!buf)
+ struct commit *commit = lookup_commit_reference(sha1);
+ if (!commit)
return -1;
-
- if (!name) {
- static char commit_name[60];
- strcpy(commit_name, sha1_to_hex(commit));
- name = commit_name;
- }
-
- /* Root commit? */
- if (show_root_diff && memcmp(buf + 46, "parent ", 7)) {
- header = generate_header(name, "root", buf, size);
- diff_root_tree(commit, "");
- }
-
- /* More than one parent? */
- if (ignore_merges) {
- if (!memcmp(buf + 46 + 48, "parent ", 7))
- 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, "");
- if (!header && verbose_header) {
- header_prefix = "\ndiff-tree ";
- /*
- * Don't print multiple merge entries if we
- * don't print the diffs.
- */
- }
- offset += 48;
- }
- free(buf);
- return 0;
+ return log_tree_commit(&log_tree_opt, 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;
- 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, "");
+ commit = lookup_commit(sha1);
+ if (!commit || parse_commit(commit))
+ return -1;
+ 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 log_tree_commit(&log_tree_opt, commit);
}
static const char diff_tree_usage[] =
-"git-diff-tree [--stdin] [-m] [-s] [-v] [--pretty] [-t] "
-"[<common diff options>] <tree-ish> <tree-ish>"
+"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"
COMMON_DIFF_OPTIONS_HELP;
int main(int argc, const char **argv)
{
int nr_sha1;
char line[1000];
- unsigned char sha1[2][20];
- const char *prefix = setup_git_directory();
+ struct object *tree1, *tree2;
+ static struct rev_info *opt = &log_tree_opt;
+ struct object_list *list;
+ int read_stdin = 0;
- git_config(git_default_config);
+ git_config(git_diff_config);
nr_sha1 = 0;
- diff_setup(&diff_options);
+ init_revisions(opt);
+ opt->abbrev = 0;
+ opt->diff = 1;
+ argc = setup_revisions(argc, argv, opt, NULL);
- for (;;) {
- int diff_opt_cnt;
- const char *arg;
+ while (--argc > 0) {
+ const char *arg = *++argv;
- argv++;
- argc--;
- arg = *argv;
- if (!arg)
- break;
-
- if (*arg != '-') {
- if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
- nr_sha1++;
- continue;
- }
- break;
- }
-
- diff_opt_cnt = diff_opt_parse(&diff_options, argv, argc);
- if (diff_opt_cnt < 0)
- usage(diff_tree_usage);
- else if (diff_opt_cnt) {
- argv += diff_opt_cnt - 1;
- argc -= diff_opt_cnt - 1;
- continue;
- }
-
-
- if (!strcmp(arg, "--")) {
- argv++;
- argc--;
- break;
- }
- if (!strcmp(arg, "-r")) {
- diff_options.recursive = 1;
- continue;
- }
- if (!strcmp(arg, "-t")) {
- diff_options.recursive = 1;
- diff_options.tree_in_recursive = 1;
- continue;
- }
- if (!strcmp(arg, "-m")) {
- ignore_merges = 0;
- continue;
- }
- if (!strcmp(arg, "-v")) {
- verbose_header = 1;
- header_prefix = "diff-tree ";
- continue;
- }
- if (!strncmp(arg, "--pretty", 8)) {
- verbose_header = 1;
- header_prefix = "diff-tree ";
- commit_format = get_commit_format(arg+8);
- continue;
- }
if (!strcmp(arg, "--stdin")) {
read_stdin = 1;
continue;
}
- if (!strcmp(arg, "--root")) {
- show_root_diff = 1;
- continue;
- }
usage(diff_tree_usage);
}
- if (diff_options.output_format == DIFF_FORMAT_PATCH)
- diff_options.recursive = 1;
- diff_tree_setup_paths(get_pathspec(prefix, argv));
+ /*
+ * NOTE! "setup_revisions()" will have inserted the revisions
+ * it parsed in reverse order. So if you do
+ *
+ * git-diff-tree a b
+ *
+ * the commit list will be "b" -> "a" -> NULL, so we reverse
+ * the order of the objects if the first one is not marked
+ * UNINTERESTING.
+ */
+ nr_sha1 = 0;
+ list = opt->pending_objects;
+ if (list) {
+ nr_sha1++;
+ tree1 = list->item;
+ list = list->next;
+ if (list) {
+ nr_sha1++;
+ tree2 = tree1;
+ tree1 = list->item;
+ if (list->next)
+ usage(diff_tree_usage);
+ /* Switch them around if the second one was uninteresting.. */
+ if (tree2->flags & UNINTERESTING) {
+ struct object *tmp = tree2;
+ tree2 = tree1;
+ tree1 = tmp;
+ }
+ }
+ }
switch (nr_sha1) {
case 0:
usage(diff_tree_usage);
break;
case 1:
- diff_tree_commit(sha1[0], NULL);
+ diff_tree_commit_sha1(tree1->sha1);
break;
case 2:
- diff_tree_sha1_top(sha1[0], sha1[1], "");
+ diff_tree_sha1(tree1->sha1,
+ tree2->sha1,
+ "", &opt->diffopt);
+ log_tree_diff_flush(opt);
break;
}
if (!read_stdin)
return 0;
- if (diff_options.detect_rename)
- diff_options.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
+ if (opt->diffopt.detect_rename)
+ opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
while (fgets(line, sizeof(line), stdin))
diff_tree_stdin(line);