From: Junio C Hamano <junkio@cox.net>
Date: Wed, 24 May 2006 19:19:47 +0000 (-0700)
Subject: Merge branch 'js/fmt-patch'
X-Git-Tag: v1.4.0-rc1~76
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=73f0a1577b92f9ce932b34a6b8657dcb377dc311;p=git.git

Merge branch 'js/fmt-patch'

This makes "git format-patch" a built-in.

* js/fmt-patch:
  git-rebase: use canonical A..B syntax to format-patch
  git-format-patch: now built-in.
  fmt-patch: Support --attach
  fmt-patch: understand old <his> notation
  Teach fmt-patch about --keep-subject
  Teach fmt-patch about --numbered
  fmt-patch: implement -o <dir>
  fmt-patch: output file names to stdout
  Teach fmt-patch to write individual files.
  Use RFC2822 dates from "git fmt-patch".
  git-fmt-patch: thinkofix to show [PATCH] properly.
  rename internal format-patch wip
  Minor tweak on subject line in --pretty=email
  Tentative built-in format-patch.
---

73f0a1577b92f9ce932b34a6b8657dcb377dc311
diff --cc Makefile
index 3bfe1c33,fbb3dca2..7e6517f6
--- a/Makefile
+++ b/Makefile
@@@ -113,10 -113,10 +113,10 @@@ SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__pow
  ### --- END CONFIGURATION SECTION ---
  
  SCRIPT_SH = \
 -	git-add.sh git-bisect.sh git-branch.sh git-checkout.sh \
 +	git-bisect.sh git-branch.sh git-checkout.sh \
  	git-cherry.sh git-clean.sh git-clone.sh git-commit.sh \
  	git-fetch.sh \
- 	git-format-patch.sh git-ls-remote.sh \
+ 	git-ls-remote.sh \
  	git-merge-one-file.sh git-parse-remote.sh \
  	git-prune.sh git-pull.sh git-rebase.sh \
  	git-repack.sh git-request-pull.sh git-reset.sh \
@@@ -168,13 -170,8 +168,13 @@@ PROGRAMS = 
  
  BUILT_INS = git-log$X git-whatchanged$X git-show$X \
  	git-count-objects$X git-diff$X git-push$X \
 -	git-grep$X git-rev-list$X git-check-ref-format$X \
 -	git-init-db$X git-format-patch$X
 +	git-grep$X git-add$X git-rm$X git-rev-list$X \
 +	git-check-ref-format$X \
- 	git-init-db$X git-tar-tree$X git-upload-tar$X \
++	git-init-db$X git-tar-tree$X git-upload-tar$X git-format-patch$X \
 +	git-ls-files$X git-ls-tree$X \
 +	git-read-tree$X git-commit-tree$X \
 +	git-apply$X git-show-branch$X git-diff-files$X \
 +	git-diff-index$X git-diff-stages$X git-diff-tree$X
  
  # what 'all' will build and 'install' will install, in gitexecdir
  ALL_PROGRAMS = $(PROGRAMS) $(SIMPLE_PROGRAMS) $(SCRIPTS)
diff --cc builtin-show-branch.c
index 3af24e76,00000000..28951409
mode 100644,000000..100644
--- a/builtin-show-branch.c
+++ b/builtin-show-branch.c
@@@ -1,789 -1,0 +1,789 @@@
 +#include <stdlib.h>
 +#include <fnmatch.h>
 +#include "cache.h"
 +#include "commit.h"
 +#include "refs.h"
 +#include "builtin.h"
 +
 +static const char show_branch_usage[] =
 +"git-show-branch [--dense] [--current] [--all] [--heads] [--tags] [--topo-order] [--more=count | --list | --independent | --merge-base ] [--topics] [<refs>...]";
 +
 +static int default_num = 0;
 +static int default_alloc = 0;
 +static const char **default_arg = NULL;
 +
 +#define UNINTERESTING	01
 +
 +#define REV_SHIFT	 2
 +#define MAX_REVS	29 /* should not exceed bits_per_int - REV_SHIFT */
 +
 +static struct commit *interesting(struct commit_list *list)
 +{
 +	while (list) {
 +		struct commit *commit = list->item;
 +		list = list->next;
 +		if (commit->object.flags & UNINTERESTING)
 +			continue;
 +		return commit;
 +	}
 +	return NULL;
 +}
 +
 +static struct commit *pop_one_commit(struct commit_list **list_p)
 +{
 +	struct commit *commit;
 +	struct commit_list *list;
 +	list = *list_p;
 +	commit = list->item;
 +	*list_p = list->next;
 +	free(list);
 +	return commit;
 +}
 +
 +struct commit_name {
 +	const char *head_name; /* which head's ancestor? */
 +	int generation; /* how many parents away from head_name */
 +};
 +
 +/* Name the commit as nth generation ancestor of head_name;
 + * we count only the first-parent relationship for naming purposes.
 + */
 +static void name_commit(struct commit *commit, const char *head_name, int nth)
 +{
 +	struct commit_name *name;
 +	if (!commit->object.util)
 +		commit->object.util = xmalloc(sizeof(struct commit_name));
 +	name = commit->object.util;
 +	name->head_name = head_name;
 +	name->generation = nth;
 +}
 +
 +/* Parent is the first parent of the commit.  We may name it
 + * as (n+1)th generation ancestor of the same head_name as
 + * commit is nth generation ancestor of, if that generation
 + * number is better than the name it already has.
 + */
 +static void name_parent(struct commit *commit, struct commit *parent)
 +{
 +	struct commit_name *commit_name = commit->object.util;
 +	struct commit_name *parent_name = parent->object.util;
 +	if (!commit_name)
 +		return;
 +	if (!parent_name ||
 +	    commit_name->generation + 1 < parent_name->generation)
 +		name_commit(parent, commit_name->head_name,
 +			    commit_name->generation + 1);
 +}
 +
 +static int name_first_parent_chain(struct commit *c)
 +{
 +	int i = 0;
 +	while (c) {
 +		struct commit *p;
 +		if (!c->object.util)
 +			break;
 +		if (!c->parents)
 +			break;
 +		p = c->parents->item;
 +		if (!p->object.util) {
 +			name_parent(c, p);
 +			i++;
 +		}
 +		c = p;
 +	}
 +	return i;
 +}
 +
 +static void name_commits(struct commit_list *list,
 +			 struct commit **rev,
 +			 char **ref_name,
 +			 int num_rev)
 +{
 +	struct commit_list *cl;
 +	struct commit *c;
 +	int i;
 +
 +	/* First give names to the given heads */
 +	for (cl = list; cl; cl = cl->next) {
 +		c = cl->item;
 +		if (c->object.util)
 +			continue;
 +		for (i = 0; i < num_rev; i++) {
 +			if (rev[i] == c) {
 +				name_commit(c, ref_name[i], 0);
 +				break;
 +			}
 +		}
 +	}
 +
 +	/* Then commits on the first parent ancestry chain */
 +	do {
 +		i = 0;
 +		for (cl = list; cl; cl = cl->next) {
 +			i += name_first_parent_chain(cl->item);
 +		}
 +	} while (i);
 +
 +	/* Finally, any unnamed commits */
 +	do {
 +		i = 0;
 +		for (cl = list; cl; cl = cl->next) {
 +			struct commit_list *parents;
 +			struct commit_name *n;
 +			int nth;
 +			c = cl->item;
 +			if (!c->object.util)
 +				continue;
 +			n = c->object.util;
 +			parents = c->parents;
 +			nth = 0;
 +			while (parents) {
 +				struct commit *p = parents->item;
 +				char newname[1000], *en;
 +				parents = parents->next;
 +				nth++;
 +				if (p->object.util)
 +					continue;
 +				en = newname;
 +				switch (n->generation) {
 +				case 0:
 +					en += sprintf(en, "%s", n->head_name);
 +					break;
 +				case 1:
 +					en += sprintf(en, "%s^", n->head_name);
 +					break;
 +				default:
 +					en += sprintf(en, "%s~%d",
 +						n->head_name, n->generation);
 +					break;
 +				}
 +				if (nth == 1)
 +					en += sprintf(en, "^");
 +				else
 +					en += sprintf(en, "^%d", nth);
 +				name_commit(p, strdup(newname), 0);
 +				i++;
 +				name_first_parent_chain(p);
 +			}
 +		}
 +	} while (i);
 +}
 +
 +static int mark_seen(struct commit *commit, struct commit_list **seen_p)
 +{
 +	if (!commit->object.flags) {
 +		insert_by_date(commit, seen_p);
 +		return 1;
 +	}
 +	return 0;
 +}
 +
 +static void join_revs(struct commit_list **list_p,
 +		      struct commit_list **seen_p,
 +		      int num_rev, int extra)
 +{
 +	int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
 +	int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
 +
 +	while (*list_p) {
 +		struct commit_list *parents;
 +		int still_interesting = !!interesting(*list_p);
 +		struct commit *commit = pop_one_commit(list_p);
 +		int flags = commit->object.flags & all_mask;
 +
 +		if (!still_interesting && extra <= 0)
 +			break;
 +
 +		mark_seen(commit, seen_p);
 +		if ((flags & all_revs) == all_revs)
 +			flags |= UNINTERESTING;
 +		parents = commit->parents;
 +
 +		while (parents) {
 +			struct commit *p = parents->item;
 +			int this_flag = p->object.flags;
 +			parents = parents->next;
 +			if ((this_flag & flags) == flags)
 +				continue;
 +			if (!p->object.parsed)
 +				parse_commit(p);
 +			if (mark_seen(p, seen_p) && !still_interesting)
 +				extra--;
 +			p->object.flags |= flags;
 +			insert_by_date(p, list_p);
 +		}
 +	}
 +
 +	/*
 +	 * Postprocess to complete well-poisoning.
 +	 *
 +	 * At this point we have all the commits we have seen in
 +	 * seen_p list (which happens to be sorted chronologically but
 +	 * it does not really matter).  Mark anything that can be
 +	 * reached from uninteresting commits not interesting.
 +	 */
 +	for (;;) {
 +		int changed = 0;
 +		struct commit_list *s;
 +		for (s = *seen_p; s; s = s->next) {
 +			struct commit *c = s->item;
 +			struct commit_list *parents;
 +
 +			if (((c->object.flags & all_revs) != all_revs) &&
 +			    !(c->object.flags & UNINTERESTING))
 +				continue;
 +
 +			/* The current commit is either a merge base or
 +			 * already uninteresting one.  Mark its parents
 +			 * as uninteresting commits _only_ if they are
 +			 * already parsed.  No reason to find new ones
 +			 * here.
 +			 */
 +			parents = c->parents;
 +			while (parents) {
 +				struct commit *p = parents->item;
 +				parents = parents->next;
 +				if (!(p->object.flags & UNINTERESTING)) {
 +					p->object.flags |= UNINTERESTING;
 +					changed = 1;
 +				}
 +			}
 +		}
 +		if (!changed)
 +			break;
 +	}
 +}
 +
 +static void show_one_commit(struct commit *commit, int no_name)
 +{
 +	char pretty[256], *cp;
 +	struct commit_name *name = commit->object.util;
 +	if (commit->object.parsed)
 +		pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
- 				    pretty, sizeof(pretty), 0);
++				    pretty, sizeof(pretty), 0, NULL, NULL);
 +	else
 +		strcpy(pretty, "(unavailable)");
 +	if (!strncmp(pretty, "[PATCH] ", 8))
 +		cp = pretty + 8;
 +	else
 +		cp = pretty;
 +
 +	if (!no_name) {
 +		if (name && name->head_name) {
 +			printf("[%s", name->head_name);
 +			if (name->generation) {
 +				if (name->generation == 1)
 +					printf("^");
 +				else
 +					printf("~%d", name->generation);
 +			}
 +			printf("] ");
 +		}
 +		else
 +			printf("[%s] ",
 +			       find_unique_abbrev(commit->object.sha1, 7));
 +	}
 +	puts(cp);
 +}
 +
 +static char *ref_name[MAX_REVS + 1];
 +static int ref_name_cnt;
 +
 +static const char *find_digit_prefix(const char *s, int *v)
 +{
 +	const char *p;
 +	int ver;
 +	char ch;
 +
 +	for (p = s, ver = 0;
 +	     '0' <= (ch = *p) && ch <= '9';
 +	     p++)
 +		ver = ver * 10 + ch - '0';
 +	*v = ver;
 +	return p;
 +}
 +
 +
 +static int version_cmp(const char *a, const char *b)
 +{
 +	while (1) {
 +		int va, vb;
 +
 +		a = find_digit_prefix(a, &va);
 +		b = find_digit_prefix(b, &vb);
 +		if (va != vb)
 +			return va - vb;
 +
 +		while (1) {
 +			int ca = *a;
 +			int cb = *b;
 +			if ('0' <= ca && ca <= '9')
 +				ca = 0;
 +			if ('0' <= cb && cb <= '9')
 +				cb = 0;
 +			if (ca != cb)
 +				return ca - cb;
 +			if (!ca)
 +				break;
 +			a++;
 +			b++;
 +		}
 +		if (!*a && !*b)
 +			return 0;
 +	}
 +}
 +
 +static int compare_ref_name(const void *a_, const void *b_)
 +{
 +	const char * const*a = a_, * const*b = b_;
 +	return version_cmp(*a, *b);
 +}
 +
 +static void sort_ref_range(int bottom, int top)
 +{
 +	qsort(ref_name + bottom, top - bottom, sizeof(ref_name[0]),
 +	      compare_ref_name);
 +}
 +
 +static int append_ref(const char *refname, const unsigned char *sha1)
 +{
 +	struct commit *commit = lookup_commit_reference_gently(sha1, 1);
 +	int i;
 +
 +	if (!commit)
 +		return 0;
 +	/* Avoid adding the same thing twice */
 +	for (i = 0; i < ref_name_cnt; i++)
 +		if (!strcmp(refname, ref_name[i]))
 +			return 0;
 +
 +	if (MAX_REVS <= ref_name_cnt) {
 +		fprintf(stderr, "warning: ignoring %s; "
 +			"cannot handle more than %d refs\n",
 +			refname, MAX_REVS);
 +		return 0;
 +	}
 +	ref_name[ref_name_cnt++] = strdup(refname);
 +	ref_name[ref_name_cnt] = NULL;
 +	return 0;
 +}
 +
 +static int append_head_ref(const char *refname, const unsigned char *sha1)
 +{
 +	unsigned char tmp[20];
 +	int ofs = 11;
 +	if (strncmp(refname, "refs/heads/", ofs))
 +		return 0;
 +	/* If both heads/foo and tags/foo exists, get_sha1 would
 +	 * get confused.
 +	 */
 +	if (get_sha1(refname + ofs, tmp) || memcmp(tmp, sha1, 20))
 +		ofs = 5;
 +	return append_ref(refname + ofs, sha1);
 +}
 +
 +static int append_tag_ref(const char *refname, const unsigned char *sha1)
 +{
 +	if (strncmp(refname, "refs/tags/", 10))
 +		return 0;
 +	return append_ref(refname + 5, sha1);
 +}
 +
 +static const char *match_ref_pattern = NULL;
 +static int match_ref_slash = 0;
 +static int count_slash(const char *s)
 +{
 +	int cnt = 0;
 +	while (*s)
 +		if (*s++ == '/')
 +			cnt++;
 +	return cnt;
 +}
 +
 +static int append_matching_ref(const char *refname, const unsigned char *sha1)
 +{
 +	/* we want to allow pattern hold/<asterisk> to show all
 +	 * branches under refs/heads/hold/, and v0.99.9? to show
 +	 * refs/tags/v0.99.9a and friends.
 +	 */
 +	const char *tail;
 +	int slash = count_slash(refname);
 +	for (tail = refname; *tail && match_ref_slash < slash; )
 +		if (*tail++ == '/')
 +			slash--;
 +	if (!*tail)
 +		return 0;
 +	if (fnmatch(match_ref_pattern, tail, 0))
 +		return 0;
 +	if (!strncmp("refs/heads/", refname, 11))
 +		return append_head_ref(refname, sha1);
 +	if (!strncmp("refs/tags/", refname, 10))
 +		return append_tag_ref(refname, sha1);
 +	return append_ref(refname, sha1);
 +}
 +
 +static void snarf_refs(int head, int tag)
 +{
 +	if (head) {
 +		int orig_cnt = ref_name_cnt;
 +		for_each_ref(append_head_ref);
 +		sort_ref_range(orig_cnt, ref_name_cnt);
 +	}
 +	if (tag) {
 +		int orig_cnt = ref_name_cnt;
 +		for_each_ref(append_tag_ref);
 +		sort_ref_range(orig_cnt, ref_name_cnt);
 +	}
 +}
 +
 +static int rev_is_head(char *head_path, int headlen, char *name,
 +		       unsigned char *head_sha1, unsigned char *sha1)
 +{
 +	int namelen;
 +	if ((!head_path[0]) ||
 +	    (head_sha1 && sha1 && memcmp(head_sha1, sha1, 20)))
 +		return 0;
 +	namelen = strlen(name);
 +	if ((headlen < namelen) ||
 +	    memcmp(head_path + headlen - namelen, name, namelen))
 +		return 0;
 +	if (headlen == namelen ||
 +	    head_path[headlen - namelen - 1] == '/')
 +		return 1;
 +	return 0;
 +}
 +
 +static int show_merge_base(struct commit_list *seen, int num_rev)
 +{
 +	int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
 +	int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
 +	int exit_status = 1;
 +
 +	while (seen) {
 +		struct commit *commit = pop_one_commit(&seen);
 +		int flags = commit->object.flags & all_mask;
 +		if (!(flags & UNINTERESTING) &&
 +		    ((flags & all_revs) == all_revs)) {
 +			puts(sha1_to_hex(commit->object.sha1));
 +			exit_status = 0;
 +			commit->object.flags |= UNINTERESTING;
 +		}
 +	}
 +	return exit_status;
 +}
 +
 +static int show_independent(struct commit **rev,
 +			    int num_rev,
 +			    char **ref_name,
 +			    unsigned int *rev_mask)
 +{
 +	int i;
 +
 +	for (i = 0; i < num_rev; i++) {
 +		struct commit *commit = rev[i];
 +		unsigned int flag = rev_mask[i];
 +
 +		if (commit->object.flags == flag)
 +			puts(sha1_to_hex(commit->object.sha1));
 +		commit->object.flags |= UNINTERESTING;
 +	}
 +	return 0;
 +}
 +
 +static void append_one_rev(const char *av)
 +{
 +	unsigned char revkey[20];
 +	if (!get_sha1(av, revkey)) {
 +		append_ref(av, revkey);
 +		return;
 +	}
 +	if (strchr(av, '*') || strchr(av, '?') || strchr(av, '[')) {
 +		/* glob style match */
 +		int saved_matches = ref_name_cnt;
 +		match_ref_pattern = av;
 +		match_ref_slash = count_slash(av);
 +		for_each_ref(append_matching_ref);
 +		if (saved_matches == ref_name_cnt &&
 +		    ref_name_cnt < MAX_REVS)
 +			error("no matching refs with %s", av);
 +		if (saved_matches + 1 < ref_name_cnt)
 +			sort_ref_range(saved_matches, ref_name_cnt);
 +		return;
 +	}
 +	die("bad sha1 reference %s", av);
 +}
 +
 +static int git_show_branch_config(const char *var, const char *value)
 +{
 +	if (!strcmp(var, "showbranch.default")) {
 +		if (default_alloc <= default_num + 1) {
 +			default_alloc = default_alloc * 3 / 2 + 20;
 +			default_arg = xrealloc(default_arg, sizeof *default_arg * default_alloc);
 +		}
 +		default_arg[default_num++] = strdup(value);
 +		default_arg[default_num] = NULL;
 +		return 0;
 +	}
 +
 +	return git_default_config(var, value);
 +}
 +
 +static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
 +{
 +	/* If the commit is tip of the named branches, do not
 +	 * omit it.
 +	 * Otherwise, if it is a merge that is reachable from only one
 +	 * tip, it is not that interesting.
 +	 */
 +	int i, flag, count;
 +	for (i = 0; i < n; i++)
 +		if (rev[i] == commit)
 +			return 0;
 +	flag = commit->object.flags;
 +	for (i = count = 0; i < n; i++) {
 +		if (flag & (1u << (i + REV_SHIFT)))
 +			count++;
 +	}
 +	if (count == 1)
 +		return 1;
 +	return 0;
 +}
 +
 +int cmd_show_branch(int ac, const char **av, char **envp)
 +{
 +	struct commit *rev[MAX_REVS], *commit;
 +	struct commit_list *list = NULL, *seen = NULL;
 +	unsigned int rev_mask[MAX_REVS];
 +	int num_rev, i, extra = 0;
 +	int all_heads = 0, all_tags = 0;
 +	int all_mask, all_revs;
 +	int lifo = 1;
 +	char head_path[128];
 +	const char *head_path_p;
 +	int head_path_len;
 +	unsigned char head_sha1[20];
 +	int merge_base = 0;
 +	int independent = 0;
 +	int no_name = 0;
 +	int sha1_name = 0;
 +	int shown_merge_point = 0;
 +	int with_current_branch = 0;
 +	int head_at = -1;
 +	int topics = 0;
 +	int dense = 1;
 +
 +	setup_git_directory();
 +	git_config(git_show_branch_config);
 +
 +	/* If nothing is specified, try the default first */
 +	if (ac == 1 && default_num) {
 +		ac = default_num + 1;
 +		av = default_arg - 1; /* ick; we would not address av[0] */
 +	}
 +
 +	while (1 < ac && av[1][0] == '-') {
 +		const char *arg = av[1];
 +		if (!strcmp(arg, "--")) {
 +			ac--; av++;
 +			break;
 +		}
 +		else if (!strcmp(arg, "--all"))
 +			all_heads = all_tags = 1;
 +		else if (!strcmp(arg, "--heads"))
 +			all_heads = 1;
 +		else if (!strcmp(arg, "--tags"))
 +			all_tags = 1;
 +		else if (!strcmp(arg, "--more"))
 +			extra = 1;
 +		else if (!strcmp(arg, "--list"))
 +			extra = -1;
 +		else if (!strcmp(arg, "--no-name"))
 +			no_name = 1;
 +		else if (!strcmp(arg, "--current"))
 +			with_current_branch = 1;
 +		else if (!strcmp(arg, "--sha1-name"))
 +			sha1_name = 1;
 +		else if (!strncmp(arg, "--more=", 7))
 +			extra = atoi(arg + 7);
 +		else if (!strcmp(arg, "--merge-base"))
 +			merge_base = 1;
 +		else if (!strcmp(arg, "--independent"))
 +			independent = 1;
 +		else if (!strcmp(arg, "--topo-order"))
 +			lifo = 1;
 +		else if (!strcmp(arg, "--topics"))
 +			topics = 1;
 +		else if (!strcmp(arg, "--sparse"))
 +			dense = 0;
 +		else if (!strcmp(arg, "--date-order"))
 +			lifo = 0;
 +		else
 +			usage(show_branch_usage);
 +		ac--; av++;
 +	}
 +	ac--; av++;
 +
 +	/* Only one of these is allowed */
 +	if (1 < independent + merge_base + (extra != 0))
 +		usage(show_branch_usage);
 +
 +	/* If nothing is specified, show all branches by default */
 +	if (ac + all_heads + all_tags == 0)
 +		all_heads = 1;
 +
 +	if (all_heads + all_tags)
 +		snarf_refs(all_heads, all_tags);
 +	while (0 < ac) {
 +		append_one_rev(*av);
 +		ac--; av++;
 +	}
 +
 +	head_path_p = resolve_ref(git_path("HEAD"), head_sha1, 1);
 +	if (head_path_p) {
 +		head_path_len = strlen(head_path_p);
 +		memcpy(head_path, head_path_p, head_path_len + 1);
 +	}
 +	else {
 +		head_path_len = 0;
 +		head_path[0] = 0;
 +	}
 +
 +	if (with_current_branch && head_path_p) {
 +		int has_head = 0;
 +		for (i = 0; !has_head && i < ref_name_cnt; i++) {
 +			/* We are only interested in adding the branch
 +			 * HEAD points at.
 +			 */
 +			if (rev_is_head(head_path,
 +					head_path_len,
 +					ref_name[i],
 +					head_sha1, NULL))
 +				has_head++;
 +		}
 +		if (!has_head) {
 +			int pfxlen = strlen(git_path("refs/heads/"));
 +			append_one_rev(head_path + pfxlen);
 +		}
 +	}
 +
 +	if (!ref_name_cnt) {
 +		fprintf(stderr, "No revs to be shown.\n");
 +		exit(0);
 +	}
 +
 +	for (num_rev = 0; ref_name[num_rev]; num_rev++) {
 +		unsigned char revkey[20];
 +		unsigned int flag = 1u << (num_rev + REV_SHIFT);
 +
 +		if (MAX_REVS <= num_rev)
 +			die("cannot handle more than %d revs.", MAX_REVS);
 +		if (get_sha1(ref_name[num_rev], revkey))
 +			die("'%s' is not a valid ref.", ref_name[num_rev]);
 +		commit = lookup_commit_reference(revkey);
 +		if (!commit)
 +			die("cannot find commit %s (%s)",
 +			    ref_name[num_rev], revkey);
 +		parse_commit(commit);
 +		mark_seen(commit, &seen);
 +
 +		/* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
 +		 * and so on.  REV_SHIFT bits from bit 0 are used for
 +		 * internal bookkeeping.
 +		 */
 +		commit->object.flags |= flag;
 +		if (commit->object.flags == flag)
 +			insert_by_date(commit, &list);
 +		rev[num_rev] = commit;
 +	}
 +	for (i = 0; i < num_rev; i++)
 +		rev_mask[i] = rev[i]->object.flags;
 +
 +	if (0 <= extra)
 +		join_revs(&list, &seen, num_rev, extra);
 +
 +	if (merge_base)
 +		return show_merge_base(seen, num_rev);
 +
 +	if (independent)
 +		return show_independent(rev, num_rev, ref_name, rev_mask);
 +
 +	/* Show list; --more=-1 means list-only */
 +	if (1 < num_rev || extra < 0) {
 +		for (i = 0; i < num_rev; i++) {
 +			int j;
 +			int is_head = rev_is_head(head_path,
 +						  head_path_len,
 +						  ref_name[i],
 +						  head_sha1,
 +						  rev[i]->object.sha1);
 +			if (extra < 0)
 +				printf("%c [%s] ",
 +				       is_head ? '*' : ' ', ref_name[i]);
 +			else {
 +				for (j = 0; j < i; j++)
 +					putchar(' ');
 +				printf("%c [%s] ",
 +				       is_head ? '*' : '!', ref_name[i]);
 +			}
 +			/* header lines never need name */
 +			show_one_commit(rev[i], 1);
 +			if (is_head)
 +				head_at = i;
 +		}
 +		if (0 <= extra) {
 +			for (i = 0; i < num_rev; i++)
 +				putchar('-');
 +			putchar('\n');
 +		}
 +	}
 +	if (extra < 0)
 +		exit(0);
 +
 +	/* Sort topologically */
 +	sort_in_topological_order(&seen, lifo);
 +
 +	/* Give names to commits */
 +	if (!sha1_name && !no_name)
 +		name_commits(seen, rev, ref_name, num_rev);
 +
 +	all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
 +	all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
 +
 +	while (seen) {
 +		struct commit *commit = pop_one_commit(&seen);
 +		int this_flag = commit->object.flags;
 +		int is_merge_point = ((this_flag & all_revs) == all_revs);
 +
 +		shown_merge_point |= is_merge_point;
 +
 +		if (1 < num_rev) {
 +			int is_merge = !!(commit->parents &&
 +					  commit->parents->next);
 +			if (topics &&
 +			    !is_merge_point &&
 +			    (this_flag & (1u << REV_SHIFT)))
 +				continue;
 +			if (dense && is_merge &&
 +			    omit_in_dense(commit, rev, num_rev))
 +				continue;
 +			for (i = 0; i < num_rev; i++) {
 +				int mark;
 +				if (!(this_flag & (1u << (i + REV_SHIFT))))
 +					mark = ' ';
 +				else if (is_merge)
 +					mark = '-';
 +				else if (i == head_at)
 +					mark = '*';
 +				else
 +					mark = '+';
 +				putchar(mark);
 +			}
 +			putchar(' ');
 +		}
 +		show_one_commit(commit, no_name);
 +
 +		if (shown_merge_point && --extra < 0)
 +			break;
 +	}
 +	return 0;
 +}
diff --cc diff.c
index 77c09a87,be459cac..9e9cfc8b
--- a/diff.c
+++ b/diff.c
@@@ -1988,10 -1981,10 +1989,13 @@@ void diff_flush(struct diff_options *op
  		show_stats(diffstat);
  		free(diffstat);
  		diffstat = NULL;
 +		if (options->summary)
 +			for (i = 0; i < q->nr; i++)
 +				diff_summary(q->queue[i]);
- 		putchar(options->line_termination);
+ 		if (options->stat_sep)
+ 			fputs(options->stat_sep, stdout);
+ 		else
+ 			putchar(options->line_termination);
  	}
  	for (i = 0; i < q->nr; i++) {
  		struct diff_filepair *p = q->queue[i];
diff --cc log-tree.c
index b90ba676,7e23e427..58b01637
--- a/log-tree.c
+++ b/log-tree.c
@@@ -49,14 -50,62 +50,62 @@@ void show_log(struct rev_info *opt, str
  	/*
  	 * Print header line of header..
  	 */
- 	printf("%s%s",
- 		opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
- 		diff_unique_abbrev(commit->object.sha1, abbrev_commit));
- 	if (opt->parents)
- 		show_parents(commit, abbrev_commit);
- 	if (parent)
- 		printf(" (from %s)", diff_unique_abbrev(parent->object.sha1, abbrev_commit));
- 	putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
+ 
+ 	if (opt->commit_format == CMIT_FMT_EMAIL) {
+ 		char *sha1 = sha1_to_hex(commit->object.sha1);
+ 		if (opt->total > 0) {
+ 			static char buffer[64];
+ 			snprintf(buffer, sizeof(buffer),
+ 					"Subject: [PATCH %d/%d] ",
+ 					opt->nr, opt->total);
+ 			subject = buffer;
+ 		} else if (opt->total == 0)
+ 			subject = "Subject: [PATCH] ";
+ 		else
+ 			subject = "Subject: ";
+ 
+ 		printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
+ 		if (opt->mime_boundary) {
+ 			static char subject_buffer[1024];
+ 			static char buffer[1024];
+ 			snprintf(subject_buffer, sizeof(subject_buffer) - 1,
+ 				 "MIME-Version: 1.0\n"
+ 				 "Content-Type: multipart/mixed;\n"
+ 				 " boundary=\"%s%s\"\n"
+ 				 "\n"
+ 				 "This is a multi-part message in MIME "
+ 				 "format.\n"
+ 				 "--%s%s\n"
+ 				 "Content-Type: text/plain; "
+ 				 "charset=UTF-8; format=fixed\n"
+ 				 "Content-Transfer-Encoding: 8bit\n\n",
+ 				 mime_boundary_leader, opt->mime_boundary,
+ 				 mime_boundary_leader, opt->mime_boundary);
+ 			after_subject = subject_buffer;
+ 
+ 			snprintf(buffer, sizeof(buffer) - 1,
+ 				 "--%s%s\n"
+ 				 "Content-Type: text/x-patch;\n"
+ 				 " name=\"%s.diff\"\n"
+ 				 "Content-Transfer-Encoding: 8bit\n"
+ 				 "Content-Disposition: inline;\n"
+ 				 " filename=\"%s.diff\"\n\n",
+ 				 mime_boundary_leader, opt->mime_boundary,
+ 				 sha1, sha1);
+ 			opt->diffopt.stat_sep = buffer;
+ 		}
+ 	} else {
+ 		printf("%s%s",
+ 		       opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
+ 		       diff_unique_abbrev(commit->object.sha1, abbrev_commit));
+ 		if (opt->parents)
+ 			show_parents(commit, abbrev_commit);
 -		if (parent) 
++		if (parent)
+ 			printf(" (from %s)",
+ 			       diff_unique_abbrev(parent->object.sha1,
+ 						  abbrev_commit));
+ 		putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
+ 	}
  
  	/*
  	 * And then the pretty-printed message itself