-#include <ctype.h>
#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 recursive = 0;
-static int show_tree_entry_in_recursive = 0;
-static int read_stdin = 0;
+static struct log_tree_opt log_tree_opt;
-static struct diff_options diff_options;
-
-static const char *header = NULL;
-static const char *header_prefix = "";
-static enum cmit_fmt commit_format = CMIT_FMT_RAW;
-
-// What paths are we interested in?
-static int nr_paths = 0;
-static const char **paths = NULL;
-static int *pathlens = NULL;
-
-static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base);
-
-static void update_tree_entry(void **bufp, unsigned long *sizep)
-{
- void *buf = *bufp;
- unsigned long size = *sizep;
- int len = strlen(buf) + 1 + 20;
-
- if (size < len)
- die("corrupt tree file");
- *bufp = buf + len;
- *sizep = size - len;
-}
-
-static const unsigned char *extract(void *tree, unsigned long size, const char **pathp, unsigned int *modep)
-{
- int len = strlen(tree)+1;
- const unsigned char *sha1 = tree + len;
- const char *path = strchr(tree, ' ');
- unsigned int mode;
-
- if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
- die("corrupt tree file");
- *pathp = path+1;
- *modep = DIFF_FILE_CANON_MODE(mode);
- return sha1;
-}
-
-static char *malloc_base(const char *base, const char *path, int pathlen)
-{
- int baselen = strlen(base);
- char *newbase = xmalloc(baselen + pathlen + 2);
- memcpy(newbase, base, baselen);
- memcpy(newbase + baselen, path, pathlen);
- memcpy(newbase + baselen + pathlen, "/", 2);
- return newbase;
-}
-
-static void show_file(const char *prefix, void *tree, unsigned long size, const char *base);
-static void show_tree(const char *prefix, void *tree, unsigned long size, const char *base);
-
-/* A file entry went away or appeared */
-static void show_file(const char *prefix, void *tree, unsigned long size, const char *base)
-{
- unsigned mode;
- const char *path;
- const unsigned char *sha1 = extract(tree, size, &path, &mode);
-
- if (recursive && S_ISDIR(mode)) {
- char type[20];
- unsigned long size;
- char *newbase = malloc_base(base, path, strlen(path));
- void *tree;
-
- tree = read_sha1_file(sha1, type, &size);
- if (!tree || strcmp(type, "tree"))
- die("corrupt tree sha %s", sha1_to_hex(sha1));
-
- show_tree(prefix, tree, size, newbase);
-
- free(tree);
- free(newbase);
- return;
- }
-
- diff_addremove(&diff_options, prefix[0], mode, sha1, base, path);
-}
-
-static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
+static int diff_tree_commit_sha1(const unsigned char *sha1)
{
- unsigned mode1, mode2;
- const char *path1, *path2;
- const unsigned char *sha1, *sha2;
- int cmp, pathlen1, pathlen2;
-
- sha1 = extract(tree1, size1, &path1, &mode1);
- sha2 = extract(tree2, size2, &path2, &mode2);
-
- pathlen1 = strlen(path1);
- pathlen2 = strlen(path2);
- cmp = base_name_compare(path1, pathlen1, mode1, path2, pathlen2, mode2);
- if (cmp < 0) {
- show_file("-", tree1, size1, base);
+ struct commit *commit = lookup_commit_reference(sha1);
+ if (!commit)
return -1;
- }
- if (cmp > 0) {
- show_file("+", tree2, size2, base);
- return 1;
- }
- if (!diff_options.find_copies_harder &&
- !memcmp(sha1, sha2, 20) && mode1 == mode2)
- return 0;
-
- /*
- * If the filemode has changed to/from a directory from/to a regular
- * file, we need to consider it a remove and an add.
- */
- if (S_ISDIR(mode1) != S_ISDIR(mode2)) {
- show_file("-", tree1, size1, base);
- show_file("+", tree2, size2, base);
- return 0;
- }
-
- if (recursive && S_ISDIR(mode1)) {
- int retval;
- char *newbase = malloc_base(base, path1, pathlen1);
- if (show_tree_entry_in_recursive)
- diff_change(&diff_options, mode1, mode2,
- sha1, sha2, base, path1);
- retval = diff_tree_sha1(sha1, sha2, newbase);
- free(newbase);
- return retval;
- }
-
- diff_change(&diff_options, mode1, mode2, sha1, sha2, base, path1);
- return 0;
-}
-
-static int interesting(void *tree, unsigned long size, const char *base)
-{
- const char *path;
- unsigned mode;
- int i;
- int baselen, pathlen;
-
- if (!nr_paths)
- return 1;
-
- (void)extract(tree, size, &path, &mode);
-
- pathlen = strlen(path);
- baselen = strlen(base);
-
- for (i=0; i < nr_paths; i++) {
- const char *match = paths[i];
- int matchlen = pathlens[i];
-
- if (baselen >= matchlen) {
- /* If it doesn't match, move along... */
- if (strncmp(base, match, matchlen))
- continue;
-
- /* The base is a subdirectory of a path which was specified. */
- return 1;
- }
-
- /* Does the base match? */
- if (strncmp(base, match, baselen))
- continue;
-
- match += baselen;
- matchlen -= baselen;
-
- if (pathlen > matchlen)
- continue;
-
- if (matchlen > pathlen) {
- if (match[pathlen] != '/')
- continue;
- if (!S_ISDIR(mode))
- continue;
- }
-
- if (strncmp(path, match, pathlen))
- continue;
-
- return 1;
- }
- return 0; /* No matches */
-}
-
-/* A whole sub-tree went away or appeared */
-static void show_tree(const char *prefix, void *tree, unsigned long size, const char *base)
-{
- while (size) {
- if (interesting(tree, size, base))
- show_file(prefix, tree, size, base);
- update_tree_entry(&tree, &size);
- }
-}
-
-static int diff_tree(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
-{
- while (size1 | size2) {
- if (nr_paths && size1 && !interesting(tree1, size1, base)) {
- update_tree_entry(&tree1, &size1);
- continue;
- }
- if (nr_paths && size2 && !interesting(tree2, size2, base)) {
- update_tree_entry(&tree2, &size2);
- continue;
- }
- if (!size1) {
- show_file("+", tree2, size2, base);
- update_tree_entry(&tree2, &size2);
- continue;
- }
- if (!size2) {
- show_file("-", tree1, size1, base);
- update_tree_entry(&tree1, &size1);
- continue;
- }
- switch (compare_tree_entry(tree1, size1, tree2, size2, base)) {
- case -1:
- update_tree_entry(&tree1, &size1);
- continue;
- case 0:
- update_tree_entry(&tree1, &size1);
- /* Fallthrough */
- case 1:
- update_tree_entry(&tree2, &size2);
- continue;
- }
- die("git-diff-tree: internal error");
- }
- return 0;
-}
-
-static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base)
-{
- void *tree1, *tree2;
- unsigned long size1, size2;
- int retval;
-
- tree1 = read_object_with_reference(old, "tree", &size1, NULL);
- if (!tree1)
- die("unable to read source tree (%s)", sha1_to_hex(old));
- tree2 = read_object_with_reference(new, "tree", &size2, NULL);
- if (!tree2)
- die("unable to read destination tree (%s)", sha1_to_hex(new));
- retval = diff_tree(tree1, size1, tree2, size2, base);
- free(tree1);
- free(tree2);
- return retval;
-}
-
-static void call_diff_setup_done(void)
-{
- diff_setup_done(&diff_options);
-}
-
-static int call_diff_flush(void)
-{
- 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);
- call_diff_flush();
- return ret;
-}
-
-static int diff_root_tree(const unsigned char *new, const char *base)
-{
- int retval;
- void *tree;
- unsigned long size;
-
- call_diff_setup_done();
- tree = read_object_with_reference(new, "tree", &size, NULL);
- if (!tree)
- die("unable to read root tree (%s)", sha1_to_hex(new));
- retval = diff_tree("", 0, tree, size, base);
- 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)
- 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);
-}
-
-static int count_paths(const char **paths)
-{
- int i = 0;
- while (*paths++)
- i++;
- return i;
+ 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)
char line[1000];
unsigned char sha1[2][20];
const char *prefix = setup_git_directory();
+ static struct log_tree_opt *opt = &log_tree_opt;
+ int read_stdin = 0;
+ git_config(git_diff_config);
nr_sha1 = 0;
- diff_setup(&diff_options);
+ init_log_tree_opt(opt);
for (;;) {
- int diff_opt_cnt;
+ int opt_cnt;
const char *arg;
argv++;
break;
}
- diff_opt_cnt = diff_opt_parse(&diff_options, argv, argc);
- if (diff_opt_cnt < 0)
+ opt_cnt = log_tree_opt_parse(opt, argv, argc);
+ if (opt_cnt < 0)
usage(diff_tree_usage);
- else if (diff_opt_cnt) {
- argv += diff_opt_cnt - 1;
- argc -= diff_opt_cnt - 1;
+ else if (opt_cnt) {
+ argv += opt_cnt - 1;
+ argc -= opt_cnt - 1;
continue;
}
-
if (!strcmp(arg, "--")) {
argv++;
argc--;
break;
}
- if (!strcmp(arg, "-r")) {
- recursive = 1;
- continue;
- }
- if (!strcmp(arg, "-t")) {
- recursive = show_tree_entry_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)
- recursive = 1;
- paths = get_pathspec(prefix, argv);
- if (paths) {
- int i;
+ if (opt->combine_merges)
+ opt->ignore_merges = 0;
- nr_paths = count_paths(paths);
- pathlens = xmalloc(nr_paths * sizeof(int));
- for (i=0; i<nr_paths; i++)
- pathlens[i] = strlen(paths[i]);
- }
+ /* We can only do dense combined merges with diff output */
+ if (opt->dense_combined_merges)
+ opt->diffopt.output_format = DIFF_FORMAT_PATCH;
+
+ diff_tree_setup_paths(get_pathspec(prefix, argv), &opt->diffopt);
+ diff_setup_done(&opt->diffopt);
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], "");
+ diff_tree_sha1(sha1[0], sha1[1], "", &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);
projects / git.git / blobdiff