X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=diff-tree.c;h=d1c61c8515cd531f1304b2b3cd0dea6a975c26c2;hb=776e994af5b85d77424581bda37fb615897063cc;hp=04eb933b00b94411f212f5ce2cb54510ce8e360e;hpb=2de381f919829aec1e35d6c7cc33519295dcd053;p=git.git

diff --git a/diff-tree.c b/diff-tree.c
index 04eb933b..d1c61c85 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -1,193 +1,147 @@
 #include "cache.h"
+#include "diff.h"
+#include "commit.h"
+#include "log-tree.h"
 
-static int recursive = 0;
+static struct log_tree_opt log_tree_opt;
 
-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)
+static int diff_tree_commit_sha1(const unsigned char *sha1)
 {
-	int len = strlen(tree)+1;
-	const unsigned char *sha1 = tree + len;
-	const char *path = strchr(tree, ' ');
-
-	if (!path || size < len + 20 || sscanf(tree, "%o", modep) != 1)
-		die("corrupt tree file");
-	*pathp = path+1;
-	return sha1;
+	struct commit *commit = lookup_commit_reference(sha1);
+	if (!commit)
+		return -1;
+	return log_tree_commit(&log_tree_opt, commit);
 }
 
-static char *malloc_base(const char *base, const char *path, int pathlen)
+static int diff_tree_stdin(char *line)
 {
-	int baselen = strlen(base);
-	char *newbase = malloc(baselen + pathlen + 2);
-	memcpy(newbase, base, baselen);
-	memcpy(newbase + baselen, path, pathlen);
-	memcpy(newbase + baselen + pathlen, "/", 2);
-	return newbase;
-}
+	int len = strlen(line);
+	unsigned char sha1[20];
+	struct commit *commit;
 
-static void show_file(const char *prefix, void *tree, unsigned long size, const char *base);
-
-/* 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) {
-		show_file(prefix, tree, size, base);
-		update_tree_entry(&tree, &size);
+	if (!len || line[len-1] != '\n')
+		return -1;
+	line[len-1] = 0;
+	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, 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;
+		}
 	}
+	return log_tree_commit(&log_tree_opt, commit);
 }
 
-/* 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;
-	}
-
-	printf("%s%o %s %s%s%c", prefix, mode, sha1_to_hex(sha1), base, path, 0);
-}
+static const char diff_tree_usage[] =
+"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;
 
-static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
+int main(int argc, const char **argv)
 {
-	unsigned mode1, mode2;
-	const char *path1, *path2;
-	const unsigned char *sha1, *sha2;
-	int cmp, pathlen1, pathlen2;
-	char old_sha1_hex[50];
-
-	sha1 = extract(tree1, size1, &path1, &mode1);
-	sha2 = extract(tree2, size2, &path2, &mode2);
-
-	pathlen1 = strlen(path1);
-	pathlen2 = strlen(path2);
-	cmp = cache_name_compare(path1, pathlen1, path2, pathlen2);
-	if (cmp < 0) {
-		show_file("-", tree1, size1, base);
-		return -1;
-	}
-	if (cmp > 0) {
-		show_file("+", tree2, size2, base);
-		return 1;
-	}
-	if (!memcmp(sha1, sha2, 20) && mode1 == mode2)
-		return 0;
+	int nr_sha1;
+	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;
 
-	/*
-	 * 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;
-	}
+	git_config(git_diff_config);
+	nr_sha1 = 0;
+	init_log_tree_opt(opt);
 
-	if (recursive && S_ISDIR(mode1)) {
-		int retval;
-		char *newbase = malloc_base(base, path1, pathlen1);
-		retval = diff_tree_sha1(sha1, sha2, newbase);
-		free(newbase);
-		return retval;
-	}
+	for (;;) {
+		int opt_cnt;
+		const char *arg;
 
-	strcpy(old_sha1_hex, sha1_to_hex(sha1));
-	printf("*%o->%o %s->%s %s%s%c", mode1, mode2, old_sha1_hex, sha1_to_hex(sha2), base, path1, 0);
-	return 0;
-}
+		argv++;
+		argc--;
+		arg = *argv;
+		if (!arg)
+			break;
+
+		if (*arg != '-') {
+			if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
+				nr_sha1++;
+				continue;
+			}
+			break;
+		}
 
-static int diff_tree(void *tree1, unsigned long size1, void *tree2, unsigned long size2, const char *base)
-{
-	while (size1 | size2) {
-		if (!size1) {
-			show_file("+", tree2, size2, base);
-			update_tree_entry(&tree2, &size2);
+		opt_cnt = log_tree_opt_parse(opt, argv, argc);
+		if (opt_cnt < 0)
+			usage(diff_tree_usage);
+		else if (opt_cnt) {
+			argv += opt_cnt - 1;
+			argc -= opt_cnt - 1;
 			continue;
 		}
-		if (!size2) {
-			show_file("-", tree1, size1, base);
-			update_tree_entry(&tree1, &size1);
-			continue;
+
+		if (!strcmp(arg, "--")) {
+			argv++;
+			argc--;
+			break;
 		}
-		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);
+		if (!strcmp(arg, "--stdin")) {
+			read_stdin = 1;
 			continue;
 		}
-		die("diff-tree: internal error");
+		usage(diff_tree_usage);
 	}
-	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;
-	char type[20];
-	int retval;
-
-	tree1 = read_sha1_file(old, type, &size1);
-	if (!tree1 || strcmp(type, "tree"))
-		die("unable to read source tree (%s)", sha1_to_hex(old));
-	tree2 = read_sha1_file(new, type, &size2);
-	if (!tree2 || strcmp(type, "tree"))
-		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;
-}
+	if (opt->combine_merges)
+		opt->ignore_merges = 0;
+
+	/* 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:
+		if (!read_stdin)
+			usage(diff_tree_usage);
+		break;
+	case 1:
+		diff_tree_commit_sha1(sha1[0]);
+		break;
+	case 2:
+		diff_tree_sha1(sha1[0], sha1[1], "", &opt->diffopt);
+		log_tree_diff_flush(opt);
+		break;
+	}
 
-int main(int argc, char **argv)
-{
-	unsigned char old[20], new[20];
+	if (!read_stdin)
+		return 0;
 
-	while (argc > 3) {
-		char *arg = argv[1];
-		argv++;
-		argc--;
-		if (!strcmp(arg, "-r")) {
-			recursive = 1;
-			continue;
-		}
-		usage("diff-tree [-R] <tree sha1> <tree sha1>");
-	}
+	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);
 
-	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, "");
+	return 0;
 }