Merge branch 'maint'

* maint:
  Fix lseek(2) calls with args 2 and 3 swapped
  Honor -p<n> when applying git diffs
  Fix dependency of common-cmds.h
  Fix renaming branch without config file
  DESTDIR support for git/contrib/emacs
  gitweb: Fix bug in "blobdiff" view for split (e.g. file to symlink) patches
  Document --left-right option to rev-list.
  Revert "builtin-archive: use RUN_SETUP"
  rename contrib/hooks/post-receieve-email to contrib/hooks/post-receive-email.
  rerere: make sorting really stable.
  Fix t4200-rerere for white-space from "wc -l"

Author: Junio C Hamano

Documentation/git-rev-list.txt

@@ -21,6 +21,7 @@ SYNOPSIS
 	     [ \--stdin ]
 	     [ \--topo-order ]
 	     [ \--parents ]
+	     [ \--left-right ]
 	     [ \--encoding[=<encoding>] ]
 	     [ \--(author|committer|grep)=<pattern> ]
 	     [ [\--objects | \--objects-edge] [ \--unpacked ] ]
@@ -101,6 +102,36 @@ include::pretty-formats.txt[]
 
 	Print the parents of the commit.
 
+--left-right::
+
+	Mark which side of a symmetric diff a commit is reachable from.
+	Commits from the left side are prefixed with `<` and those from
+	the right with `>`.  If combined with `--boundary`, those
+	commits are prefixed with `-`.
++
+For example, if you have this topology:
++
+-----------------------------------------------------------------------
+             y---b---b  branch B
+            / \ /
+           /   .
+          /   / \
+         o---x---a---a  branch A
+-----------------------------------------------------------------------
++
+you would get an output line this:
++
+-----------------------------------------------------------------------
+	$ git rev-list --left-right --boundary --pretty=oneline A...B
+
+	>bbbbbbb... 3rd on b
+	>bbbbbbb... 2nd on b
+	<aaaaaaa... 3rd on a
+	<aaaaaaa... 2nd on a
+	-yyyyyyy... 1st on b
+	-xxxxxxx... 1st on a
+-----------------------------------------------------------------------
+
 Diff Formatting
 ~~~~~~~~~~~~~~~
 

Makefile

@@ -727,7 +727,7 @@ help.o: common-cmds.h
 $(BUILT_INS): git$X
 	$(QUIET_BUILT_IN)rm -f $@ && ln git$X $@
 
-common-cmds.h: Documentation/git-*.txt
+common-cmds.h: $(wildcard Documentation/git-*.txt)
 	$(QUIET_GEN)./generate-cmdlist.sh > $@+ && mv $@+ $@
 
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh

builtin-apply.c

@@ -417,7 +417,7 @@ static int gitdiff_hdrend(const char *line, struct patch *patch)
 static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
 {
 	if (!orig_name && !isnull)
-		return find_name(line, NULL, 1, TERM_TAB);
+		return find_name(line, NULL, p_value, TERM_TAB);
 
 	if (orig_name) {
 		int len;
@@ -427,7 +427,7 @@ static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name,
 		len = strlen(name);
 		if (isnull)
 			die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
-		another = find_name(line, NULL, 1, TERM_TAB);
+		another = find_name(line, NULL, p_value, TERM_TAB);
 		if (!another || memcmp(another, name, len))
 			die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
 		free(another);

builtin-archive.c

@@ -252,6 +252,8 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
 
 	memset(&ar, 0, sizeof(ar));
 	tree_idx = parse_archive_args(argc, argv, &ar);
+	if (prefix == NULL)
+		prefix = setup_git_directory();
 
 	argv += tree_idx;
 	parse_treeish_arg(argv, &ar.args, prefix);

builtin-rerere.c

@@ -117,10 +117,13 @@ static int handle_file(const char *path,
 		else if (!prefixcmp(buf, "======="))
 			hunk = 2;
 		else if (!prefixcmp(buf, ">>>>>>> ")) {
+			int one_is_longer = (one->nr > two->nr);
+			int common_len = one_is_longer ? two->nr : one->nr;
+			int cmp = memcmp(one->ptr, two->ptr, common_len);
+
 			hunk_no++;
 			hunk = 0;
-			if (memcmp(one->ptr, two->ptr, one->nr < two->nr ?
-						one->nr : two->nr) > 0) {
+			if ((cmp > 0) || ((cmp == 0) && one_is_longer)) {
 				struct buffer *swap = one;
 				one = two;
 				two = swap;

builtin-rev-list.c

@@ -35,6 +35,7 @@ static const char rev_list_usage[] =
 "    --header | --pretty\n"
 "    --abbrev=nr | --no-abbrev\n"
 "    --abbrev-commit\n"
+"    --left-right\n"
 "  special purpose:\n"
 "    --bisect\n"
 "    --bisect-vars"

config.c

@@ -916,8 +916,8 @@ int git_config_rename_section(const char *old_name, const char *new_name)
 	}
 
 	if (!(config_file = fopen(config_filename, "rb"))) {
-		ret = error("Could not open config file!");
-		goto out;
+		/* no config file means nothing to rename, no error */
+		goto unlock_and_out;
 	}
 
 	while (fgets(buf, sizeof(buf), config_file)) {
@@ -951,6 +951,7 @@ int git_config_rename_section(const char *old_name, const char *new_name)
 		}
 	}
 	fclose(config_file);
+ unlock_and_out:
 	if (close(out_fd) || commit_lock_file(lock) < 0)
 			ret = error("Cannot commit config file!");
  out:

contrib/emacs/Makefile

@@ -11,8 +11,8 @@ emacsdir = $(prefix)/share/emacs/site-lisp
 all: $(ELC)
 
 install: all
-	$(INSTALL) -d $(emacsdir)
-	$(INSTALL_ELC) $(ELC) $(emacsdir)
+	$(INSTALL) -d $(DESTDIR)$(emacsdir)
+	$(INSTALL_ELC) $(ELC) $(DESTDIR)$(emacsdir)
 
 %.elc: %.el
 	$(EMACS) -batch -f batch-byte-compile $<

contrib/hooks/post-receieve-email renamed to contrib/hooks/post-receive-email

@@ -226,7 +226,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "add", cmd_add, RUN_SETUP | NOT_BARE },
 		{ "annotate", cmd_annotate, USE_PAGER },
 		{ "apply", cmd_apply },
-		{ "archive", cmd_archive, RUN_SETUP },
+		{ "archive", cmd_archive },
 		{ "blame", cmd_blame, RUN_SETUP },
 		{ "branch", cmd_branch, RUN_SETUP },
 		{ "bundle", cmd_bundle },