1 files changed, 156 insertions, 108 deletions

diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index c0bab6aaa9..3898a2c9c4 100644
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "config.h"
 #include "commit.h"
 #include "diff.h"
 #include "string-list.h"
@@ -10,11 +11,31 @@
 #include "parse-options.h"
 
 static char const * const shortlog_usage[] = {
-	N_("git shortlog [<options>] [<revision-range>] [[--] [<path>...]]"),
+	N_("git shortlog [<options>] [<revision-range>] [[--] <path>...]"),
+	N_("git log --pretty=short | git shortlog [<options>]"),
 	NULL
 };
 
-static int compare_by_number(const void *a1, const void *a2)
+/*
+ * The util field of our string_list_items will contain one of two things:
+ *
+ *   - if --summary is not in use, it will point to a string list of the
+ *     oneline subjects assigned to this author
+ *
+ *   - if --summary is in use, we don't need that list; we only need to know
+ *     its size. So we abuse the pointer slot to store our integer counter.
+ *
+ *  This macro accesses the latter.
+ */
+#define UTIL_TO_INT(x) ((intptr_t)(x)->util)
+
+static int compare_by_counter(const void *a1, const void *a2)
+{
+	const struct string_list_item *i1 = a1, *i2 = a2;
+	return UTIL_TO_INT(i2) - UTIL_TO_INT(i1);
+}
+
+static int compare_by_list(const void *a1, const void *a2)
 {
 	const struct string_list_item *i1 = a1, *i2 = a2;
 	const struct string_list *l1 = i1->util, *l2 = i2->util;
@@ -31,18 +52,60 @@ static void insert_one_record(struct shortlog *log,
 			      const char *author,
 			      const char *oneline)
 {
-	const char *dot3 = log->common_repo_prefix;
-	char *buffer, *p;
 	struct string_list_item *item;
+
+	item = string_list_insert(&log->list, author);
+
+	if (log->summary)
+		item->util = (void *)(UTIL_TO_INT(item) + 1);
+	else {
+		const char *dot3 = log->common_repo_prefix;
+		char *buffer, *p;
+		struct strbuf subject = STRBUF_INIT;
+		const char *eol;
+
+		/* Skip any leading whitespace, including any blank lines. */
+		while (*oneline && isspace(*oneline))
+			oneline++;
+		eol = strchr(oneline, '\n');
+		if (!eol)
+			eol = oneline + strlen(oneline);
+		if (starts_with(oneline, "[PATCH")) {
+			char *eob = strchr(oneline, ']');
+			if (eob && (!eol || eob < eol))
+				oneline = eob + 1;
+		}
+		while (*oneline && isspace(*oneline) && *oneline != '\n')
+			oneline++;
+		format_subject(&subject, oneline, " ");
+		buffer = strbuf_detach(&subject, NULL);
+
+		if (dot3) {
+			int dot3len = strlen(dot3);
+			if (dot3len > 5) {
+				while ((p = strstr(buffer, dot3)) != NULL) {
+					int taillen = strlen(p) - dot3len;
+					memcpy(p, "/.../", 5);
+					memmove(p + 5, p + dot3len, taillen + 1);
+				}
+			}
+		}
+
+		if (item->util == NULL)
+			item->util = xcalloc(1, sizeof(struct string_list));
+		string_list_append(item->util, buffer);
+	}
+}
+
+static int parse_stdin_author(struct shortlog *log,
+			       struct strbuf *out, const char *in)
+{
 	const char *mailbuf, *namebuf;
 	size_t namelen, maillen;
-	const char *eol;
-	struct strbuf subject = STRBUF_INIT;
-	struct strbuf namemailbuf = STRBUF_INIT;
 	struct ident_split ident;
 
-	if (split_ident_line(&ident, author, strlen(author)))
-		return;
+	if (split_ident_line(&ident, in, strlen(in)))
+		return -1;
 
 	namebuf = ident.name_begin;
 	mailbuf = ident.mail_begin;
@@ -50,104 +113,75 @@ static void insert_one_record(struct shortlog *log,
 	maillen = ident.mail_end - ident.mail_begin;
 
 	map_user(&log->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
-	strbuf_add(&namemailbuf, namebuf, namelen);
-
+	strbuf_add(out, namebuf, namelen);
 	if (log->email)
-		strbuf_addf(&namemailbuf, " <%.*s>", (int)maillen, mailbuf);
-
-	item = string_list_insert(&log->list, namemailbuf.buf);
-	if (item->util == NULL)
-		item->util = xcalloc(1, sizeof(struct string_list));
-
-	/* Skip any leading whitespace, including any blank lines. */
-	while (*oneline && isspace(*oneline))
-		oneline++;
-	eol = strchr(oneline, '\n');
-	if (!eol)
-		eol = oneline + strlen(oneline);
-	if (starts_with(oneline, "[PATCH")) {
-		char *eob = strchr(oneline, ']');
-		if (eob && (!eol || eob < eol))
-			oneline = eob + 1;
-	}
-	while (*oneline && isspace(*oneline) && *oneline != '\n')
-		oneline++;
-	format_subject(&subject, oneline, " ");
-	buffer = strbuf_detach(&subject, NULL);
-
-	if (dot3) {
-		int dot3len = strlen(dot3);
-		if (dot3len > 5) {
-			while ((p = strstr(buffer, dot3)) != NULL) {
-				int taillen = strlen(p) - dot3len;
-				memcpy(p, "/.../", 5);
-				memmove(p + 5, p + dot3len, taillen + 1);
-			}
-		}
-	}
+		strbuf_addf(out, " <%.*s>", (int)maillen, mailbuf);
 
-	string_list_append(item->util, buffer);
+	return 0;
 }
 
 static void read_from_stdin(struct shortlog *log)
 {
-	char author[1024], oneline[1024];
-
-	while (fgets(author, sizeof(author), stdin) != NULL) {
-		if (!(author[0] == 'A' || author[0] == 'a') ||
-		    !starts_with(author + 1, "uthor: "))
+	struct strbuf author = STRBUF_INIT;
+	struct strbuf mapped_author = STRBUF_INIT;
+	struct strbuf oneline = STRBUF_INIT;
+	static const char *author_match[2] = { "Author: ", "author " };
+	static const char *committer_match[2] = { "Commit: ", "committer " };
+	const char **match;
+
+	match = log->committer ? committer_match : author_match;
+	while (strbuf_getline_lf(&author, stdin) != EOF) {
+		const char *v;
+		if (!skip_prefix(author.buf, match[0], &v) &&
+		    !skip_prefix(author.buf, match[1], &v))
 			continue;
-		while (fgets(oneline, sizeof(oneline), stdin) &&
-		       oneline[0] != '\n')
+		while (strbuf_getline_lf(&oneline, stdin) != EOF &&
+		       oneline.len)
 			; /* discard headers */
-		while (fgets(oneline, sizeof(oneline), stdin) &&
-		       oneline[0] == '\n')
+		while (strbuf_getline_lf(&oneline, stdin) != EOF &&
+		       !oneline.len)
 			; /* discard blanks */
-		insert_one_record(log, author + 8, oneline);
+
+		strbuf_reset(&mapped_author);
+		if (parse_stdin_author(log, &mapped_author, v) < 0)
+			continue;
+
+		insert_one_record(log, mapped_author.buf, oneline.buf);
 	}
+	strbuf_release(&author);
+	strbuf_release(&mapped_author);
+	strbuf_release(&oneline);
 }
 
 void shortlog_add_commit(struct shortlog *log, struct commit *commit)
 {
-	const char *author = NULL, *buffer;
-	struct strbuf buf = STRBUF_INIT;
-	struct strbuf ufbuf = STRBUF_INIT;
-
-	pp_commit_easy(CMIT_FMT_RAW, commit, &buf);
-	buffer = buf.buf;
-	while (*buffer && *buffer != '\n') {
-		const char *eol = strchr(buffer, '\n');
-
-		if (eol == NULL)
-			eol = buffer + strlen(buffer);
+	struct strbuf author = STRBUF_INIT;
+	struct strbuf oneline = STRBUF_INIT;
+	struct pretty_print_context ctx = {0};
+	const char *fmt;
+
+	ctx.fmt = CMIT_FMT_USERFORMAT;
+	ctx.abbrev = log->abbrev;
+	ctx.print_email_subject = 1;
+	ctx.date_mode.type = DATE_NORMAL;
+	ctx.output_encoding = get_log_output_encoding();
+
+	fmt = log->committer ?
+		(log->email ? "%cN <%cE>" : "%cN") :
+		(log->email ? "%aN <%aE>" : "%aN");
+
+	format_commit_message(commit, fmt, &author, &ctx);
+	if (!log->summary) {
+		if (log->user_format)
+			pretty_print_commit(&ctx, commit, &oneline);
 		else
-			eol++;
-
-		if (starts_with(buffer, "author "))
-			author = buffer + 7;
-		buffer = eol;
-	}
-	if (!author) {
-		warning(_("Missing author: %s"),
-		    sha1_to_hex(commit->object.sha1));
-		return;
-	}
-	if (log->user_format) {
-		struct pretty_print_context ctx = {0};
-		ctx.fmt = CMIT_FMT_USERFORMAT;
-		ctx.abbrev = log->abbrev;
-		ctx.subject = "";
-		ctx.after_subject = "";
-		ctx.date_mode = DATE_NORMAL;
-		ctx.output_encoding = get_log_output_encoding();
-		pretty_print_commit(&ctx, commit, &ufbuf);
-		buffer = ufbuf.buf;
-	} else if (*buffer) {
-		buffer++;
+			format_commit_message(commit, "%s", &oneline, &ctx);
 	}
-	insert_one_record(log, author, !*buffer ? "<none>" : buffer);
-	strbuf_release(&ufbuf);
-	strbuf_release(&buf);
+
+	insert_one_record(log, author.buf, oneline.len ? oneline.buf : "<none>");
+
+	strbuf_release(&author);
+	strbuf_release(&oneline);
 }
 
 static void get_from_rev(struct rev_info *rev, struct shortlog *log)
@@ -221,19 +255,22 @@ void shortlog_init(struct shortlog *log)
 
 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 {
-	static struct shortlog log;
-	static struct rev_info rev;
+	struct shortlog log = { STRING_LIST_INIT_NODUP };
+	struct rev_info rev;
 	int nongit = !startup_info->have_repository;
 
-	static const struct option options[] = {
+	const struct option options[] = {
+		OPT_BOOL('c', "committer", &log.committer,
+			 N_("Group by committer rather than author")),
 		OPT_BOOL('n', "numbered", &log.sort_by_number,
 			 N_("sort output according to the number of commits per author")),
 		OPT_BOOL('s', "summary", &log.summary,
 			 N_("Suppress commit descriptions, only provides commit count")),
 		OPT_BOOL('e', "email", &log.email,
 			 N_("Show the email address of each author")),
-		{ OPTION_CALLBACK, 'w', NULL, &log, N_("w[,i1[,i2]]"),
-			N_("Linewrap output"), PARSE_OPT_OPTARG, &parse_wrap_args },
+		{ OPTION_CALLBACK, 'w', NULL, &log, N_("<w>[,<i1>[,<i2>]]"),
+			N_("Linewrap output"), PARSE_OPT_OPTARG,
+			&parse_wrap_args },
 		OPT_END(),
 	};
 
@@ -248,6 +285,7 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 	for (;;) {
 		switch (parse_options_step(&ctx, options, shortlog_usage)) {
 		case PARSE_OPT_HELP:
+		case PARSE_OPT_ERROR:
 			exit(129);
 		case PARSE_OPT_DONE:
 			goto parse_done;
@@ -257,6 +295,11 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 parse_done:
 	argc = parse_options_end(&ctx);
 
+	if (nongit && argc > 1) {
+		error(_("too many arguments given outside repository"));
+		usage_with_options(shortlog_usage, options);
+	}
+
 	if (setup_revisions(argc, argv, &rev, NULL) != 1) {
 		error(_("unrecognized argument: %s"), argv[1]);
 		usage_with_options(shortlog_usage, options);
@@ -264,6 +307,7 @@ parse_done:
 
 	log.user_format = rev.commit_format == CMIT_FMT_USERFORMAT;
 	log.abbrev = rev.abbrev;
+	log.file = rev.diffopt.file;
 
 	/* assume HEAD if from a tty */
 	if (!nongit && !rev.pending.nr && isatty(0))
@@ -277,6 +321,8 @@ parse_done:
 		get_from_rev(&rev, &log);
 
 	shortlog_output(&log);
+	if (log.file != stdout)
+		fclose(log.file);
 	return 0;
 }
 
@@ -293,32 +339,34 @@ void shortlog_output(struct shortlog *log)
 	struct strbuf sb = STRBUF_INIT;
 
 	if (log->sort_by_number)
-		qsort(log->list.items, log->list.nr, sizeof(struct string_list_item),
-			compare_by_number);
+		QSORT(log->list.items, log->list.nr,
+		      log->summary ? compare_by_counter : compare_by_list);
 	for (i = 0; i < log->list.nr; i++) {
-		struct string_list *onelines = log->list.items[i].util;
-
+		const struct string_list_item *item = &log->list.items[i];
 		if (log->summary) {
-			printf("%6d\t%s\n", onelines->nr, log->list.items[i].string);
+			fprintf(log->file, "%6d\t%s\n",
+				(int)UTIL_TO_INT(item), item->string);
 		} else {
-			printf("%s (%d):\n", log->list.items[i].string, onelines->nr);
+			struct string_list *onelines = item->util;
+			fprintf(log->file, "%s (%d):\n",
+				item->string, onelines->nr);
 			for (j = onelines->nr - 1; j >= 0; j--) {
 				const char *msg = onelines->items[j].string;
 
 				if (log->wrap_lines) {
 					strbuf_reset(&sb);
 					add_wrapped_shortlog_msg(&sb, msg, log);
-					fwrite(sb.buf, sb.len, 1, stdout);
+					fwrite(sb.buf, sb.len, 1, log->file);
 				}
 				else
-					printf("      %s\n", msg);
+					fprintf(log->file, "      %s\n", msg);
 			}
-			putchar('\n');
+			putc('\n', log->file);
+			onelines->strdup_strings = 1;
+			string_list_clear(onelines, 0);
+			free(onelines);
 		}
 
-		onelines->strdup_strings = 1;
-		string_list_clear(onelines, 0);
-		free(onelines);
 		log->list.items[i].util = NULL;
 	}