pretty: add pp_commit_easy function for simple callers

Many callers don't actually care about the pretty print
context at all; let's just give them a simple way of
pretty-printing a commit without having to create a context
struct.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/branch.c

@@ -436,9 +436,7 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 
 		commit = item->commit;
 		if (commit && !parse_commit(commit)) {
-			struct pretty_print_context ctx = {0};
-			pretty_print_commit(CMIT_FMT_ONELINE, commit,
-					    &subject, &ctx);
+			pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
 			sub = subject.buf;
 		}
 

builtin/checkout.c

@@ -300,9 +300,8 @@ static void show_local_changes(struct object *head, struct diff_options *opts)
 static void describe_detached_head(char *msg, struct commit *commit)
 {
 	struct strbuf sb = STRBUF_INIT;
-	struct pretty_print_context ctx = {0};
 	parse_commit(commit);
-	pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, &ctx);
+	pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb);
 	fprintf(stderr, "%s %s... %s\n", msg,
 		find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf);
 	strbuf_release(&sb);

builtin/log.c

@@ -1439,9 +1439,7 @@ int cmd_cherry(int argc, const char **argv, const char *prefix)
 
 		if (verbose) {
 			struct strbuf buf = STRBUF_INIT;
-			struct pretty_print_context ctx = {0};
-			pretty_print_commit(CMIT_FMT_ONELINE, commit,
-					    &buf, &ctx);
+			pp_commit_easy(CMIT_FMT_ONELINE, commit, &buf);
 			printf("%c %s %s\n", sign,
 			       find_unique_abbrev(commit->object.sha1, abbrev),
 			       buf.buf);

builtin/shortlog.c

@@ -141,9 +141,8 @@ 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;
-	struct pretty_print_context ctx = {0};
 
-	pretty_print_commit(CMIT_FMT_RAW, commit, &buf, &ctx);
+	pp_commit_easy(CMIT_FMT_RAW, commit, &buf);
 	buffer = buf.buf;
 	while (*buffer && *buffer != '\n') {
 		const char *eol = strchr(buffer, '\n');

builtin/show-branch.c

@@ -293,8 +293,7 @@ static void show_one_commit(struct commit *commit, int no_name)
 	struct commit_name *name = commit->util;
 
 	if (commit->object.parsed) {
-		struct pretty_print_context ctx = {0};
-		pretty_print_commit(CMIT_FMT_ONELINE, commit, &pretty, &ctx);
+		pp_commit_easy(CMIT_FMT_ONELINE, commit, &pretty);
 		pretty_str = pretty.buf;
 	}
 	if (!prefixcmp(pretty_str, "[PATCH] "))

commit.h

@@ -98,6 +98,8 @@ extern void format_commit_message(const struct commit *commit,
 extern void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 				struct strbuf *sb,
 				const struct pretty_print_context *context);
+extern void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
+			   struct strbuf *sb);
 void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 		   const char *line, enum date_mode dmode,
 		   const char *encoding);

pretty.c

@@ -1288,3 +1288,10 @@ void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 
 	free(reencoded);
 }
+
+void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
+		    struct strbuf *sb)
+{
+	struct pretty_print_context pp = {0};
+	pretty_print_commit(fmt, commit, sb, &pp);
+}