Merge branch 'jk/format-patch-am'

* jk/format-patch-am:
  format-patch: preserve subject newlines with -k
  clean up calling conventions for pretty.c functions
  pretty: add pp_commit_easy function for simple callers
  mailinfo: always clean up rfc822 header folding
  t: test subject handling in format-patch / am pipeline

Conflicts:
	builtin/branch.c
	builtin/log.c
	commit.h

builtin/branch.c

@@ -399,9 +399,7 @@ static void add_verbose_info(struct strbuf *out, struct ref_item *item,
 	struct commit *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

@@ -306,9 +306,8 @@ static void show_local_changes(struct object *head, struct diff_options *opts)
 static void describe_detached_head(const 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);
@@ -623,14 +622,12 @@ static int clear_commit_marks_from_one_ref(const char *refname,
 
 static void describe_one_orphan(struct strbuf *sb, struct commit *commit)
 {
-	struct pretty_print_context ctx = { 0 };
-
 	parse_commit(commit);
 	strbuf_addstr(sb, "  ");
 	strbuf_addstr(sb,
 		find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
 	strbuf_addch(sb, ' ');
-	pretty_print_commit(CMIT_FMT_ONELINE, commit, sb, &ctx);
+	pp_commit_easy(CMIT_FMT_ONELINE, commit, sb);
 	strbuf_addch(sb, '\n');
 }
 

builtin/log.c

@@ -376,9 +376,11 @@ int cmd_whatchanged(int argc, const char **argv, const char *prefix)
 static void show_tagger(char *buf, int len, struct rev_info *rev)
 {
 	struct strbuf out = STRBUF_INIT;
+	struct pretty_print_context pp = {0};
 
-	pp_user_info("Tagger", rev->commit_format, &out, buf, rev->date_mode,
-		get_log_output_encoding());
+	pp.fmt = rev->commit_format;
+	pp.date_mode = rev->date_mode;
+	pp_user_info(&pp, "Tagger", &out, buf, get_log_output_encoding());
 	printf("%s", out.buf);
 	strbuf_release(&out);
 }
@@ -762,17 +764,16 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
 			      int quiet)
 {
 	const char *committer;
-	const char *subject_start = NULL;
 	const char *body = "*** SUBJECT HERE ***\n\n*** BLURB HERE ***\n";
 	const char *msg;
-	const char *extra_headers = rev->extra_headers;
 	struct shortlog log;
 	struct strbuf sb = STRBUF_INIT;
 	int i;
 	const char *encoding = "UTF-8";
 	struct diff_options opts;
 	int need_8bit_cte = 0;
 	struct commit *commit = NULL;
+	struct pretty_print_context pp = {0};
 
 	if (rev->commit_format != CMIT_FMT_EMAIL)
 		die(_("Cover letter needs email format"));
@@ -804,19 +805,19 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
 		free(commit);
 	}
 
-	log_write_email_headers(rev, head, &subject_start, &extra_headers,
+	log_write_email_headers(rev, head, &pp.subject, &pp.after_subject,
 				&need_8bit_cte);
 
 	for (i = 0; !need_8bit_cte && i < nr; i++)
 		if (has_non_ascii(list[i]->buffer))
 			need_8bit_cte = 1;
 
 	msg = body;
-	pp_user_info(NULL, CMIT_FMT_EMAIL, &sb, committer, DATE_RFC2822,
-		     encoding);
-	pp_title_line(CMIT_FMT_EMAIL, &msg, &sb, subject_start, extra_headers,
-		      encoding, need_8bit_cte);
-	pp_remainder(CMIT_FMT_EMAIL, &msg, &sb, 0);
+	pp.fmt = CMIT_FMT_EMAIL;
+	pp.date_mode = DATE_RFC2822;
+	pp_user_info(&pp, NULL, &sb, committer, encoding);
+	pp_title_line(&pp, &msg, &sb, encoding, need_8bit_cte);
+	pp_remainder(&pp, &msg, &sb, 0);
 	printf("%s\n", sb.buf);
 
 	strbuf_release(&sb);
@@ -1180,6 +1181,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 		die (_("-n and -k are mutually exclusive."));
 	if (keep_subject && subject_prefix)
 		die (_("--subject-prefix and -k are mutually exclusive."));
+	rev.preserve_subject = keep_subject;
 
 	argc = setup_revisions(argc, argv, &rev, &s_r_opt);
 	if (argc > 1)
@@ -1410,8 +1412,7 @@ static void print_commit(char sign, struct commit *commit, int verbose,
 		       find_unique_abbrev(commit->object.sha1, abbrev));
 	} else {
 		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/mailinfo.c

@@ -400,7 +400,7 @@ static int read_one_header_line(struct strbuf *line, FILE *in)
 			break;
 		if (strbuf_getline(&continuation, in, '\n'))
 			break;
-		continuation.buf[0] = '\n';
+		continuation.buf[0] = ' ';
 		strbuf_rtrim(&continuation);
 		strbuf_addbuf(line, &continuation);
 	}

builtin/merge.c

@@ -339,13 +339,14 @@ static void squash_message(void)
 
 	ctx.abbrev = rev.abbrev;
 	ctx.date_mode = rev.date_mode;
+	ctx.fmt = rev.commit_format;
 
 	strbuf_addstr(&out, "Squashed commit of the following:\n");
 	while ((commit = get_revision(&rev)) != NULL) {
 		strbuf_addch(&out, '\n');
 		strbuf_addf(&out, "commit %s\n",
 			sha1_to_hex(commit->object.sha1));
-		pretty_print_commit(rev.commit_format, commit, &out, &ctx);
+		pretty_print_commit(&ctx, commit, &out);
 	}
 	if (write(fd, out.buf, out.len) < 0)
 		die_errno(_("Writing SQUASH_MSG"));

builtin/rev-list.c

@@ -104,7 +104,8 @@ static void show_commit(struct commit *commit, void *data)
 		struct pretty_print_context ctx = {0};
 		ctx.abbrev = revs->abbrev;
 		ctx.date_mode = revs->date_mode;
-		pretty_print_commit(revs->commit_format, commit, &buf, &ctx);
+		ctx.fmt = revs->commit_format;
+		pretty_print_commit(&ctx, commit, &buf);
 		if (revs->graph) {
 			if (buf.len) {
 				if (revs->commit_format != CMIT_FMT_ONELINE)

builtin/shortlog.c

@@ -138,9 +138,8 @@ 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');
@@ -159,11 +158,12 @@ void shortlog_add_commit(struct shortlog *log, struct commit *commit)
 		    sha1_to_hex(commit->object.sha1));
 	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;
-		pretty_print_commit(CMIT_FMT_USERFORMAT, commit, &ufbuf, &ctx);
+		pretty_print_commit(&ctx, commit, &ufbuf);
 		buffer = ufbuf.buf;
 	} else if (*buffer) {
 		buffer++;

builtin/show-branch.c

@@ -283,8 +283,7 @@ 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

@@ -69,9 +69,11 @@ enum cmit_fmt {
 };
 
 struct pretty_print_context {
+	enum cmit_fmt fmt;
 	int abbrev;
 	const char *subject;
 	const char *after_subject;
+	int preserve_subject;
 	enum date_mode date_mode;
 	int need_8bit_cte;
 	int show_notes;
@@ -96,20 +98,20 @@ extern void userformat_find_requirements(const char *fmt, struct userformat_want
 extern void format_commit_message(const struct commit *commit,
 				  const char *format, struct strbuf *sb,
 				  const struct pretty_print_context *context);
-extern void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
-				struct strbuf *sb,
-				const struct pretty_print_context *context);
-void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
-		   const char *line, enum date_mode dmode,
-		   const char *encoding);
-void pp_title_line(enum cmit_fmt fmt,
+extern void pretty_print_commit(const struct pretty_print_context *pp,
+				const struct commit *commit,
+				struct strbuf *sb);
+extern void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
+			   struct strbuf *sb);
+void pp_user_info(const struct pretty_print_context *pp,
+		  const char *what, struct strbuf *sb,
+		  const char *line, const char *encoding);
+void pp_title_line(const struct pretty_print_context *pp,
 		   const char **msg_p,
 		   struct strbuf *sb,
-		   const char *subject,
-		   const char *after_subject,
 		   const char *encoding,
 		   int need_8bit_cte);
-void pp_remainder(enum cmit_fmt fmt,
+void pp_remainder(const struct pretty_print_context *pp,
 		  const char **msg_p,
 		  struct strbuf *sb,
 		  int indent);

log-tree.c

@@ -485,8 +485,10 @@ void show_log(struct rev_info *opt)
 	ctx.date_mode = opt->date_mode;
 	ctx.abbrev = opt->diffopt.abbrev;
 	ctx.after_subject = extra_headers;
+	ctx.preserve_subject = opt->preserve_subject;
 	ctx.reflog_info = opt->reflog_info;
-	pretty_print_commit(opt->commit_format, commit, &msgbuf, &ctx);
+	ctx.fmt = opt->commit_format;
+	pretty_print_commit(&ctx, commit, &msgbuf);
 
 	if (opt->add_signoff)
 		append_signoff(&msgbuf, opt->add_signoff);