X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=diff-tree.c;h=e8f5d1b126179c705f6463c25216d90e3e376848;hb=f8ff0c0641a14770a2214fffbd4271b1ea3a0d61;hp=207617c8fa247821474948cde4e34aefe4d6b5f2;hpb=73134b6d3f700bb9e6c66aa2f099de644c6b8d09;p=git.git

diff --git a/diff-tree.c b/diff-tree.c
index 207617c8..e8f5d1b1 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -1,8 +1,35 @@
+#include <ctype.h>
 #include "cache.h"
+#include "diff.h"
+#include "commit.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 int diff_output_format = DIFF_FORMAT_RAW;
+static int diff_line_termination = '\n';
+static int detect_rename = 0;
+static int find_copies_harder = 0;
+static int diff_setup_opt = 0;
+static int diff_score_opt = 0;
+static const char *pickaxe = NULL;
+static int pickaxe_opts = 0;
+static int diff_break_opt = -1;
+static const char *orderfile = NULL;
+static const char *diff_filter = NULL;
+static const char *header = NULL;
+static const char *header_prefix = "";
+static enum cmit_fmt commit_format = CMIT_FMT_RAW;
 
-static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *src, const char *dst);
+// 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)
 {
@@ -11,7 +38,7 @@ static void update_tree_entry(void **bufp, unsigned long *sizep)
 	int len = strlen(buf) + 1 + 20;
 
 	if (size < len)
-		usage("corrupt tree file");
+		die("corrupt tree file");
 	*bufp = buf + len;
 	*sizep = size - len;
 }
@@ -21,22 +48,56 @@ static const unsigned char *extract(void *tree, unsigned long size, const char *
 	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", modep) != 1)
-		usage("corrupt tree file");
+	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);
-	printf("%s%o %s %s%s%c", prefix, mode, sha1_to_hex(sha1), base, path, 0);
+
+	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(prefix[0], mode, sha1, base, path);
 }
 
-static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *src, const char *dst)
+static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
 {
 	unsigned mode1, mode2;
 	const char *path1, *path2;
@@ -48,50 +109,127 @@ static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, uns
 
 	pathlen1 = strlen(path1);
 	pathlen2 = strlen(path2);
-	cmp = cache_name_compare(path1, pathlen1, path2, pathlen2);
+	cmp = base_name_compare(path1, pathlen1, mode1, path2, pathlen2, mode2);
 	if (cmp < 0) {
-		show_file("-", tree1, size1, src);
+		show_file("-", tree1, size1, base);
 		return -1;
 	}
 	if (cmp > 0) {
-		show_file("+", tree2, size2, dst);
+		show_file("+", tree2, size2, base);
 		return 1;
 	}
-	if (!memcmp(sha1, sha2, 20) && mode1 == mode2)
+	if (!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) && S_ISDIR(mode2)) {
-		int srclen = strlen(src);
-		int dstlen = strlen(dst);
-		char *srcbase = malloc(srclen + pathlen1 + 2);
-		char *dstbase = malloc(srclen + pathlen1 + 2);
-		memcpy(srcbase, src, srclen);
-		memcpy(srcbase + srclen, path1, pathlen1);
-		memcpy(srcbase + srclen + pathlen1, "/", 2);
-		memcpy(dstbase, dst, dstlen);
-		memcpy(dstbase + dstlen, path2, pathlen2);
-		memcpy(dstbase + dstlen + pathlen2, "/", 2);
-		return diff_tree_sha1(sha1, sha2, srcbase, dstbase);
-	}
-
-	show_file("<", tree1, size1, src);
-	show_file(">", tree2, size2, dst);
+	}
+
+	if (recursive && S_ISDIR(mode1)) {
+		int retval;
+		char *newbase = malloc_base(base, path1, pathlen1);
+		if (show_tree_entry_in_recursive)
+			diff_change(mode1, mode2, sha1, sha2, base, path1);
+		retval = diff_tree_sha1(sha1, sha2, newbase);
+		free(newbase);
+		return retval;
+	}
+
+	diff_change(mode1, mode2, sha1, sha2, base, path1);
 	return 0;
 }
 
-static int diff_tree(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *src, const char *dst)
+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, dst);
+			show_file("+", tree2, size2, base);
 			update_tree_entry(&tree2, &size2);
 			continue;
 		}
 		if (!size2) {
-			show_file("-", tree1, size1, src);
+			show_file("-", tree1, size1, base);
 			update_tree_entry(&tree1, &size1);
 			continue;
 		}
-		switch (compare_tree_entry(tree1, size1, tree2, size2, src, dst)) {
+		switch (compare_tree_entry(tree1, size1, tree2, size2, base)) {
 		case -1:
 			update_tree_entry(&tree1, &size1);
 			continue;
@@ -102,46 +240,330 @@ static int diff_tree(void *tree1, unsigned long size1, void *tree2, unsigned lon
 			update_tree_entry(&tree2, &size2);
 			continue;
 		}
-		usage("diff-tree: internal error");
+		die("git-diff-tree: internal error");
 	}
 	return 0;
 }
 
-static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *src, const char *dst)
+static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base)
 {
 	void *tree1, *tree2;
 	unsigned long size1, size2;
-	char type[20];
 	int retval;
 
-	tree1 = read_sha1_file(old, type, &size1);
-	if (!tree1 || strcmp(type, "tree"))
-		usage("unable to read source tree");
-	tree2 = read_sha1_file(new, type, &size2);
-	if (!tree2 || strcmp(type, "tree"))
-		usage("unable to read destination tree");
-	retval = diff_tree(tree1, size1, tree2, size2, src, dst);
+	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(void)
+{
+	diff_setup(diff_setup_opt);
+}
+
+static int call_diff_flush(void)
+{
+	diffcore_std(NULL,
+		     detect_rename, diff_score_opt,
+		     pickaxe, pickaxe_opts,
+		     diff_break_opt,
+		     orderfile,
+		     diff_filter);
+	if (diff_queue_is_empty()) {
+		diff_flush(DIFF_FORMAT_NO_OUTPUT, diff_line_termination);
+		return 0;
+	}
+	if (header) {
+		printf("%s%c", header, diff_line_termination);
+		header = NULL;
+	}
+	diff_flush(diff_output_format, diff_line_termination);
+	return 1;
+}
+
+static int diff_tree_sha1_top(const unsigned char *old,
+			      const unsigned char *new, const char *base)
+{
+	int ret;
+
+	call_diff_setup();
+	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();
+	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;
+}
+
+static int diff_tree_stdin(char *line)
+{
+	int len = strlen(line);
+	unsigned char commit[20], parent[20];
+	static char this_header[1000];
+
+	if (!len || line[len-1] != '\n')
+		return -1;
+	line[len-1] = 0;
+	if (get_sha1_hex(line, 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, "");
+	}
+	line[40] = 0;
+	return diff_tree_commit(commit, line);
+}
+
+static int count_paths(const char **paths)
+{
+	int i = 0;
+	while (*paths++)
+		i++;
+	return i;
+}
+
+static const char diff_tree_usage[] =
+"git-diff-tree [--stdin] [-m] [-s] [-v] [--pretty] [-t] "
+"[<common diff options>] <tree-ish> <tree-ish>"
+COMMON_DIFF_OPTIONS_HELP;
+
 int main(int argc, char **argv)
 {
-	unsigned char old[20], new[20];
+	int nr_sha1;
+	char line[1000];
+	unsigned char sha1[2][20];
+	const char *prefix = setup_git_directory();
+
+	nr_sha1 = 0;
+	for (;;) {
+		const char *arg;
 
-	while (argc > 3) {
-		char *arg = argv[1];
 		argv++;
 		argc--;
+		arg = *argv;
+		if (!arg)
+			break;
+
+		if (*arg != '-') {
+			if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
+				nr_sha1++;
+				continue;
+			}
+			break;
+		}
+
+		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, "-R")) {
+			diff_setup_opt |= DIFF_SETUP_REVERSE;
+			continue;
+		}
+		if (!strcmp(arg, "-p") || !strcmp(arg, "-u")) {
+			diff_output_format = DIFF_FORMAT_PATCH;
 			recursive = 1;
 			continue;
 		}
-		usage("diff-tree [-R] <tree sha1> <tree sha1>");
+		if (!strncmp(arg, "-S", 2)) {
+			pickaxe = arg + 2;
+			continue;
+		}
+		if (!strncmp(arg, "-O", 2)) {
+			orderfile = arg + 2;
+			continue;
+		}
+		if (!strncmp(arg, "--diff-filter=", 14)) {
+			diff_filter = arg + 14;
+			continue;
+		}
+		if (!strcmp(arg, "--pickaxe-all")) {
+			pickaxe_opts = DIFF_PICKAXE_ALL;
+			continue;
+		}
+		if (!strncmp(arg, "-M", 2)) {
+			detect_rename = DIFF_DETECT_RENAME;
+			if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
+				usage(diff_tree_usage);
+			continue;
+		}
+		if (!strncmp(arg, "-C", 2)) {
+			detect_rename = DIFF_DETECT_COPY;
+			if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
+				usage(diff_tree_usage);
+			continue;
+		}
+		if (!strncmp(arg, "-B", 2)) {
+			if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
+				usage(diff_tree_usage);
+			continue;
+		}
+		if (!strcmp(arg, "--find-copies-harder")) {
+			find_copies_harder = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--name-only")) {
+			diff_output_format = DIFF_FORMAT_NAME;
+			continue;
+		}
+		if (!strcmp(arg, "-z")) {
+			diff_line_termination = 0;
+			continue;
+		}
+		if (!strcmp(arg, "-m")) {
+			ignore_merges = 0;
+			continue;
+		}
+		if (!strcmp(arg, "-s")) {
+			diff_output_format = DIFF_FORMAT_NO_OUTPUT;
+			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 (find_copies_harder && detect_rename != DIFF_DETECT_COPY)
+		usage(diff_tree_usage);
 
-	if (argc != 3 || get_sha1_hex(argv[1], old) || get_sha1_hex(argv[2], new))
-		usage("diff-tree <tree sha1> <tree sha1>");
-	return diff_tree_sha1(old, new, "", "");
+	paths = get_pathspec(prefix, argv);
+	if (paths) {
+		int i;
+
+		nr_paths = count_paths(paths);
+		pathlens = xmalloc(nr_paths * sizeof(int));
+		for (i=0; i<nr_paths; i++)
+			pathlens[i] = strlen(paths[i]);
+	}
+
+	switch (nr_sha1) {
+	case 0:
+		if (!read_stdin)
+			usage(diff_tree_usage);
+		break;
+	case 1:
+		diff_tree_commit(sha1[0], NULL);
+		break;
+	case 2:
+		diff_tree_sha1_top(sha1[0], sha1[1], "");
+		break;
+	}
+
+	if (!read_stdin)
+		return 0;
+
+	if (detect_rename)
+		diff_setup_opt |= (DIFF_SETUP_USE_SIZE_CACHE |
+				   DIFF_SETUP_USE_CACHE);
+	while (fgets(line, sizeof(line), stdin))
+		diff_tree_stdin(line);
+
+	return 0;
 }