Merge branch 'master' into mk/rename

* master:
  git-verify-pack: no need to count errors
  git-verify-pack: buffer overrun paranoia
  git-verify-pack: free pack after use and a cleanup
  git-verify-pack: get rid of while loop
  git-verify-pack: insist on .idx extension
  git-verify-pack: more careful path handling
  git-verify-pack: show usage when no pack was specified
  Add has_extension()
  builtin-apply: remove unused increment
  Fix git-diff A...B
  combine-diff: use color
  git-apply: applying a patch to make a symlink shorter.
  allow diff.renamelimit to be set regardless of -M/-C
  make --find-copies-harder imply -C
  find_unique_abbrev() with len=0 should not abbreviate
  check return value from diff_setup_done()
  Fix tutorial-2.html
  Documentation: git-status takes the same options as git-commit
  Update git-init-db(1) and documentation of core.sharedRepository

Documentation/config.txt

@@ -83,9 +83,12 @@ core.repositoryFormatVersion::
 	version.
 
 core.sharedRepository::
-	If true, the repository is made shareable between several users
-	in a group (making sure all the files and objects are group-writable).
-	See gitlink:git-init-db[1]. False by default.
+	When 'group' (or 'true'), the repository is made shareable between
+	several users in a group (making sure all the files and objects are
+	group-writable). When 'all' (or 'world' or 'everybody'), the
+	repository will be readable by all users, additionally to being
+	group-shareable. When 'umask' (or 'false'), git will use permissions
+	reported by umask(2). See gitlink:git-init-db[1]. False by default.
 
 core.warnAmbiguousRefs::
 	If true, git will warn you if the ref name you passed it is ambiguous

Documentation/git-init-db.txt

@@ -8,17 +8,47 @@ git-init-db - Creates an empty git repository
 
 SYNOPSIS
 --------
-'git-init-db' [--template=<template_directory>] [--shared]
+'git-init-db' [--template=<template_directory>] [--shared[=<permissions>]]
 
 
 OPTIONS
 -------
---template=<template_directory>::
-	Provide the directory from which templates will be used.
-	The default template directory is `/usr/share/git-core/templates`.
 
---shared::
-	Specify that the git repository is to be shared amongst several users.
+--
+
+--template=<template_directory>::
+
+Provide the directory from which templates will be used.  The default template
+directory is `/usr/share/git-core/templates`.
+
+When specified, `<template_directory>` is used as the source of the template
+files rather than the default.  The template files include some directory
+structure, some suggested "exclude patterns", and copies of non-executing
+"hook" files.  The suggested patterns and hook files are all modifiable and
+extensible.
+
+--shared[={false|true|umask|group|all|world|everybody}]::
+
+Specify that the git repository is to be shared amongst several users.  This
+allows users belonging to the same group to push into that
+repository.  When specified, the config variable "core.sharedRepository" is
+set so that files and directories under `$GIT_DIR` are created with the
+requested permissions.  When not specified, git will use permissions reported
+by umask(2).
+
+The option can have the following values, defaulting to 'group' if no value
+is given:
+
+ - 'umask' (or 'false'): Use permissions reported by umask(2). The default,
+   when `--shared` is not specified.
+
+ - 'group' (or 'true'): Make the repository group-writable, (and g+sx, since
+   the git group may be not the primary group of all users).
+
+ - 'all' (or 'world' or 'everybody'): Same as 'group', but make the repository
+   readable by all users.
+
+--
 
 
 DESCRIPTION
@@ -29,12 +59,6 @@ template files.
 An initial `HEAD` file that references the HEAD of the master branch
 is also created.
 
-If `--template=<template_directory>` is specified, `<template_directory>`
-is used as the source of the template files rather than the default.
-The template files include some directory structure, some suggested
-"exclude patterns", and copies of non-executing "hook" files.  The
-suggested patterns and hook files are all modifiable and extensible.
-
 If the `$GIT_DIR` environment variable is set then it specifies a path
 to use instead of `./.git` for the base of the repository.
 
@@ -42,11 +66,6 @@ If the object storage directory is specified via the `$GIT_OBJECT_DIRECTORY`
 environment variable then the sha1 directories are created underneath -
 otherwise the default `$GIT_DIR/objects` directory is used.
 
-A shared repository allows users belonging to the same group to push into that
-repository. When specifying `--shared` the config variable "core.sharedRepository" 
-is set to 'true' so that directories under `$GIT_DIR` are made group writable
-(and g+sx, since the git group may be not the primary group of all users).
-
 Running `git-init-db` in an existing repository is safe. It will not overwrite
 things that are already there. The primary reason for rerunning `git-init-db`
 is to pick up newly added templates.

Documentation/git-status.txt

@@ -8,7 +8,7 @@ git-status - Show working tree status
 
 SYNOPSIS
 --------
-'git-status'
+'git-status' <options>...
 
 DESCRIPTION
 -----------
@@ -23,6 +23,10 @@ If there is no path that is different between the index file and
 the current HEAD commit, the command exits with non-zero
 status.
 
+The command takes the same set of options as `git-commit`; it
+shows what would be committed if the same options are given to
+`git-commit`.
+
 
 OUTPUT
 ------

Documentation/tutorial-2.txt

@@ -244,6 +244,7 @@ $ git ls-files --stage
 $ git cat-file -t 513feba2
 blob
 $ git cat-file blob 513feba2
+hello world!
 hello world, again
 ------------------------------------------------
 

builtin-apply.c

@@ -1698,6 +1698,12 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
 	desc.buffer = buf;
 	if (apply_fragments(&desc, patch) < 0)
 		return -1;
+
+	/* NUL terminate the result */
+	if (desc.alloc <= desc.size)
+		desc.buffer = xrealloc(desc.buffer, desc.size + 1);
+	desc.buffer[desc.size] = 0;
+
 	patch->result = desc.buffer;
 	patch->resultsize = desc.size;
 
@@ -2040,6 +2046,9 @@ static int try_create_file(const char *path, unsigned int mode, const char *buf,
 	int fd;
 
 	if (S_ISLNK(mode))
+		/* Although buf:size is counted string, it also is NUL
+		 * terminated.
+		 */
 		return symlink(buf, path);
 	fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
 	if (fd < 0)

builtin-diff.c

@@ -253,7 +253,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 	argc = setup_revisions(argc, argv, &rev, NULL);
 	if (!rev.diffopt.output_format) {
 		rev.diffopt.output_format = DIFF_FORMAT_PATCH;
-		diff_setup_done(&rev.diffopt);
+		if (diff_setup_done(&rev.diffopt) < 0)
+			die("diff_setup_done failed");
 	}
 
 	/* Do we have --cached and not have a pending object, then
@@ -348,6 +349,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 		 * A and B.  We have ent[0] == merge-base, ent[1] == A,
 		 * and ent[2] == B.  Show diff between the base and B.
 		 */
+		ent[1] = ent[2];
 		return builtin_diff_tree(&rev, argc, argv, ent);
 	}
 	else

combine-diff.c

@@ -497,11 +497,17 @@ static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long
 	printf(" -%lu,%lu", l0, l1-l0);
 }
 
-static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
+static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
+		       int use_color)
 {
 	unsigned long mark = (1UL<<num_parent);
 	int i;
 	unsigned long lno = 0;
+	const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO);
+	const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW);
+	const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD);
+	const char *c_plain = diff_get_color(use_color, DIFF_PLAIN);
+	const char *c_reset = diff_get_color(use_color, DIFF_RESET);
 
 	if (!cnt)
 		return; /* result deleted */
@@ -522,12 +528,13 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
 		rlines = hunk_end - lno;
 		if (cnt < hunk_end)
 			rlines--; /* pointing at the last delete hunk */
+		fputs(c_frag, stdout);
 		for (i = 0; i <= num_parent; i++) putchar(combine_marker);
 		for (i = 0; i < num_parent; i++)
 			show_parent_lno(sline, lno, hunk_end, i);
 		printf(" +%lu,%lu ", lno+1, rlines);
 		for (i = 0; i <= num_parent; i++) putchar(combine_marker);
-		putchar('\n');
+		printf("%s\n", c_reset);
 		while (lno < hunk_end) {
 			struct lline *ll;
 			int j;
@@ -535,18 +542,23 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
 			sl = &sline[lno++];
 			ll = sl->lost_head;
 			while (ll) {
+				fputs(c_old, stdout);
 				for (j = 0; j < num_parent; j++) {
 					if (ll->parent_map & (1UL<<j))
 						putchar('-');
 					else
 						putchar(' ');
 				}
-				puts(ll->line);
+				printf("%s%s\n", ll->line, c_reset);
 				ll = ll->next;
 			}
 			if (cnt < lno)
 				break;
 			p_mask = 1;
+			if (!(sl->flag & (mark-1)))
+				fputs(c_plain, stdout);
+			else
+				fputs(c_new, stdout);
 			for (j = 0; j < num_parent; j++) {
 				if (p_mask & sl->flag)
 					putchar('+');
@@ -554,7 +566,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent)
 					putchar(' ');
 				p_mask <<= 1;
 			}
-			printf("%.*s\n", sl->len, sl->bol);
+			printf("%.*s%s\n", sl->len, sl->bol, c_reset);
 		}
 	}
 }
@@ -586,14 +598,15 @@ static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
 	sline->p_lno[i] = sline->p_lno[j];
 }
 
-static void dump_quoted_path(const char *prefix, const char *path)
+static void dump_quoted_path(const char *prefix, const char *path,
+			     const char *c_meta, const char *c_reset)
 {
-	fputs(prefix, stdout);
+	printf("%s%s", c_meta, prefix);
 	if (quote_c_style(path, NULL, NULL, 0))
 		quote_c_style(path, NULL, stdout, 0);
 	else
 		printf("%s", path);
-	putchar('\n');
+	printf("%s\n", c_reset);
 }
 
 static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
@@ -699,18 +712,22 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 
 	if (show_hunks || mode_differs || working_tree_file) {
 		const char *abb;
+		int use_color = opt->color_diff;
+		const char *c_meta = diff_get_color(use_color, DIFF_METAINFO);
+		const char *c_reset = diff_get_color(use_color, DIFF_RESET);
 
 		if (rev->loginfo)
 			show_log(rev, opt->msg_sep);
-		dump_quoted_path(dense ? "diff --cc " : "diff --combined ", elem->path);
-		printf("index ");
+		dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
+				 elem->path, c_meta, c_reset);
+		printf("%sindex ", c_meta);
 		for (i = 0; i < num_parent; i++) {
 			abb = find_unique_abbrev(elem->parent[i].sha1,
 						 abbrev);
 			printf("%s%s", i ? "," : "", abb);
 		}
 		abb = find_unique_abbrev(elem->sha1, abbrev);
-		printf("..%s\n", abb);
+		printf("..%s%s\n", abb, c_reset);
 
 		if (mode_differs) {
 			int added = !!elem->mode;
@@ -719,10 +736,11 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 				    DIFF_STATUS_ADDED)
 					added = 0;
 			if (added)
-				printf("new file mode %06o", elem->mode);
+				printf("%snew file mode %06o",
+				       c_meta, elem->mode);
 			else {
 				if (!elem->mode)
-					printf("deleted file ");
+					printf("%sdeleted file ", c_meta);
 				printf("mode ");
 				for (i = 0; i < num_parent; i++) {
 					printf("%s%06o", i ? "," : "",
@@ -731,11 +749,11 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 				if (elem->mode)
 					printf("..%06o", elem->mode);
 			}
-			putchar('\n');
+			printf("%s\n", c_reset);
 		}
-		dump_quoted_path("--- a/", elem->path);
-		dump_quoted_path("+++ b/", elem->path);
-		dump_sline(sline, cnt, num_parent);
+		dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
+		dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
+		dump_sline(sline, cnt, num_parent, opt->color_diff);
 	}
 	free(result);
 

diff.c

@@ -1515,10 +1515,8 @@ void diff_setup(struct diff_options *options)
 
 int diff_setup_done(struct diff_options *options)
 {
-	if ((options->find_copies_harder &&
-	     options->detect_rename != DIFF_DETECT_COPY) ||
-	    (0 <= options->rename_limit && !options->detect_rename))
-		return -1;
+	if (options->find_copies_harder)
+		options->detect_rename = DIFF_DETECT_COPY;
 
 	if (options->output_format & (DIFF_FORMAT_NAME |
 				      DIFF_FORMAT_NAME_STATUS |

git-compat-util.h

@@ -139,6 +139,12 @@ static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 	}
 }
 
+static inline int has_extension(const char *filename, int len, const char *ext)
+{
+	int extlen = strlen(ext);
+	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
+}
+
 /* Sane ctype - no locale, and works with signed chars */
 #undef isspace
 #undef isdigit

help.c

@@ -140,7 +140,7 @@ static void list_commands(const char *exec_path, const char *pattern)
 			continue;
 
 		entlen = strlen(de->d_name);
-		if (4 < entlen && !strcmp(de->d_name + entlen - 4, ".exe"))
+		if (has_extension(de->d_name, entlen, ".exe"))
 			entlen -= 4;
 
 		if (longest < entlen)

http-fetch.c

@@ -870,7 +870,7 @@ static void process_ls_pack(struct remote_ls_ctx *ls)
 
 	if (strlen(ls->dentry_name) == 63 &&
 	    !strncmp(ls->dentry_name, "objects/pack/pack-", 18) &&
-	    !strncmp(ls->dentry_name+58, ".pack", 5)) {
+	    has_extension(ls->dentry_name, 63, ".pack")) {
 		get_sha1_hex(ls->dentry_name + 18, sha1);
 		setup_index(ls->repo, sha1);
 	}

index-pack.c

@@ -447,7 +447,7 @@ int main(int argc, char **argv)
 		usage(index_pack_usage);
 	if (!index_name) {
 		int len = strlen(pack_name);
-		if (len < 5 || strcmp(pack_name + len - 5, ".pack"))
+		if (!has_extension(pack_name, len, ".pack"))
 			die("packfile name '%s' does not end with '.pack'",
 			    pack_name);
 		index_name_buf = xmalloc(len);

local-fetch.c

@@ -44,7 +44,7 @@ static int setup_indices(void)
 	while ((de = readdir(dir)) != NULL) {
 		int namelen = strlen(de->d_name);
 		if (namelen != 50 ||
-		    strcmp(de->d_name + namelen - 5, ".pack"))
+		    !has_extension(de->d_name, namelen, ".pack"))
 			continue;
 		get_sha1_hex(de->d_name + 5, sha1);
 		setup_index(sha1);

refs.c

@@ -147,7 +147,7 @@ static int do_for_each_ref(const char *base, int (*fn)(const char *path, const u
 			namelen = strlen(de->d_name);
 			if (namelen > 255)
 				continue;
-			if (namelen>5 && !strcmp(de->d_name+namelen-5,".lock"))
+			if (has_extension(de->d_name, namelen, ".lock"))
 				continue;
 			memcpy(path + baselen, de->d_name, namelen+1);
 			if (stat(git_path("%s", path), &st) < 0)

revision.c

@@ -936,7 +936,8 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
 			revs->diffopt.output_format = DIFF_FORMAT_PATCH;
 	}
 	revs->diffopt.abbrev = revs->abbrev;
-	diff_setup_done(&revs->diffopt);
+	if (diff_setup_done(&revs->diffopt) < 0)
+		die("diff_setup_done failed");
 
 	return left;
 }

sha1_file.c

@@ -590,7 +590,7 @@ static void prepare_packed_git_one(char *objdir, int local)
 		int namelen = strlen(de->d_name);
 		struct packed_git *p;
 
-		if (strcmp(de->d_name + namelen - 4, ".idx"))
+		if (!has_extension(de->d_name, namelen, ".idx"))
 			continue;
 
 		/* we have .idx.  Is it a file we can map? */

sha1_name.c

@@ -193,7 +193,7 @@ const char *find_unique_abbrev(const unsigned char *sha1, int len)
 
 	is_null = !memcmp(sha1, null_sha1, 20);
 	memcpy(hex, sha1_to_hex(sha1), 40);
-	if (len == 40)
+	if (len == 40 || !len)
 		return hex;
 	while (len < 40) {
 		unsigned char sha1_ret[20];

t/t4115-apply-symlink.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+
+test_description='git-apply symlinks and partial files
+
+'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	ln -s path1/path2/path3/path4/path5 link1 &&
+	git add link? &&
+	git commit -m initial &&
+
+	git branch side &&
+
+	rm -f link? &&
+
+	ln -s htap6 link1 &&
+	git update-index link? &&
+	git commit -m second &&
+
+	git diff-tree -p HEAD^ HEAD >patch  &&
+	git apply --stat --summary patch
+
+'
+
+test_expect_success 'apply symlink patch' '
+
+	git checkout side &&
+	git apply patch &&
+	git diff-files -p >patched &&
+	diff -u patch patched
+
+'
+
+test_expect_success 'apply --index symlink patch' '
+
+	git checkout -f side &&
+	git apply --index patch &&
+	git diff-index --cached -p HEAD >patched &&
+	diff -u patch patched
+
+'
+
+test_done

verify-pack.c

@@ -1,43 +1,60 @@
 #include "cache.h"
 #include "pack.h"
 
-static int verify_one_pack(char *arg, int verbose)
+static int verify_one_pack(const char *path, int verbose)
 {
-	int len = strlen(arg);
-	struct packed_git *g;
+	char arg[PATH_MAX];
+	int len;
+	struct packed_git *pack;
+	int err;
 
-	while (1) {
-		/* Should name foo.idx, but foo.pack may be named;
-		 * convert it to foo.idx
-		 */
-		if (!strcmp(arg + len - 5, ".pack")) {
-			strcpy(arg + len - 5, ".idx");
-			len--;
-		}
-		/* Should name foo.idx now */
-		if ((g = add_packed_git(arg, len, 1)))
-			break;
-		/* No?  did you name just foo? */
+	len = strlcpy(arg, path, PATH_MAX);
+	if (len >= PATH_MAX)
+		return error("name too long: %s", path);
+
+	/*
+	 * In addition to "foo.idx" we accept "foo.pack" and "foo";
+	 * normalize these forms to "foo.idx" for add_packed_git().
+	 */
+	if (has_extension(arg, len, ".pack")) {
+		strcpy(arg + len - 5, ".idx");
+		len--;
+	} else if (!has_extension(arg, len, ".idx")) {
+		if (len + 4 >= PATH_MAX)
+			return error("name too long: %s.idx", arg);
 		strcpy(arg + len, ".idx");
 		len += 4;
-		if ((g = add_packed_git(arg, len, 1)))
-			break;
-		return error("packfile %s not found.", arg);
 	}
-	return verify_pack(g, verbose);
+
+	/*
+	 * add_packed_git() uses our buffer (containing "foo.idx") to
+	 * build the pack filename ("foo.pack").  Make sure it fits.
+	 */
+	if (len + 1 >= PATH_MAX) {
+		arg[len - 4] = '\0';
+		return error("name too long: %s.pack", arg);
+	}
+
+	pack = add_packed_git(arg, len, 1);
+	if (!pack)
+		return error("packfile %s not found.", arg);
+
+	err = verify_pack(pack, verbose);
+	free(pack);
+
+	return err;
 }
 
 static const char verify_pack_usage[] = "git-verify-pack [-v] <pack>...";
 
 int main(int ac, char **av)
 {
-	int errs = 0;
+	int err = 0;
 	int verbose = 0;
 	int no_more_options = 0;
+	int nothing_done = 1;
 
 	while (1 < ac) {
-		char path[PATH_MAX];
-
 		if (!no_more_options && av[1][0] == '-') {
 			if (!strcmp("-v", av[1]))
 				verbose = 1;
@@ -47,11 +64,15 @@ int main(int ac, char **av)
 				usage(verify_pack_usage);
 		}
 		else {
-			strcpy(path, av[1]);
-			if (verify_one_pack(path, verbose))
-				errs++;
+			if (verify_one_pack(av[1], verbose))
+				err = 1;
+			nothing_done = 0;
 		}
 		ac--; av++;
 	}
-	return !!errs;
+
+	if (nothing_done)
+		usage(verify_pack_usage);
+
+	return err;
 }