Merge branch 'bc/append-signed-off-by'

Consolidate codepaths that inspect log-message-to-be and decide to
add a new Signed-off-by line in various commands.

* bc/append-signed-off-by:
  git-commit: populate the edit buffer with 2 blank lines before s-o-b
  Unify appending signoff in format-patch, commit and sequencer
  format-patch: update append_signoff prototype
  t4014: more tests about appending s-o-b lines
  sequencer.c: teach append_signoff to avoid adding a duplicate newline
  sequencer.c: teach append_signoff how to detect duplicate s-o-b
  sequencer.c: always separate "(cherry picked from" from commit body
  sequencer.c: require a conforming footer to be preceded by a blank line
  sequencer.c: recognize "(cherry picked from ..." as part of s-o-b footer
  t/t3511: add some tests of 'cherry-pick -s' functionality
  t/test-lib-functions.sh: allow to specify the tag name to test_commit
  commit, cherry-pick -s: remove broken support for multiline rfc2822 fields
  sequencer.c: rework search for start of footer to improve clarity

1 files changed, 6 insertions, 86 deletions

diff --git a/log-tree.c b/log-tree.c
index 3d88823871..92bb2bf48e 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -9,6 +9,7 @@
 #include "string-list.h"
 #include "color.h"
 #include "gpg-interface.h"
+#include "sequencer.h"
 
 struct decoration name_decoration = { "object names" };
 
@@ -206,89 +207,6 @@ void show_decorations(struct rev_info *opt, struct commit *commit)
 	putchar(')');
 }
 
-/*
- * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
- * Signed-off-by: and Acked-by: lines.
- */
-static int detect_any_signoff(char *letter, int size)
-{
-	char *cp;
-	int seen_colon = 0;
-	int seen_at = 0;
-	int seen_name = 0;
-	int seen_head = 0;
-
-	cp = letter + size;
-	while (letter <= --cp && *cp == '\n')
-		continue;
-
-	while (letter <= cp) {
-		char ch = *cp--;
-		if (ch == '\n')
-			break;
-
-		if (!seen_at) {
-			if (ch == '@')
-				seen_at = 1;
-			continue;
-		}
-		if (!seen_colon) {
-			if (ch == '@')
-				return 0;
-			else if (ch == ':')
-				seen_colon = 1;
-			else
-				seen_name = 1;
-			continue;
-		}
-		if (('A' <= ch && ch <= 'Z') ||
-		    ('a' <= ch && ch <= 'z') ||
-		    ch == '-') {
-			seen_head = 1;
-			continue;
-		}
-		/* no empty last line doesn't match */
-		return 0;
-	}
-	return seen_head && seen_name;
-}
-
-static void append_signoff(struct strbuf *sb, const char *signoff)
-{
-	static const char signed_off_by[] = "Signed-off-by: ";
-	size_t signoff_len = strlen(signoff);
-	int has_signoff = 0;
-	char *cp;
-
-	cp = sb->buf;
-
-	/* First see if we already have the sign-off by the signer */
-	while ((cp = strstr(cp, signed_off_by))) {
-
-		has_signoff = 1;
-
-		cp += strlen(signed_off_by);
-		if (cp + signoff_len >= sb->buf + sb->len)
-			break;
-		if (strncmp(cp, signoff, signoff_len))
-			continue;
-		if (!isspace(cp[signoff_len]))
-			continue;
-		/* we already have him */
-		return;
-	}
-
-	if (!has_signoff)
-		has_signoff = detect_any_signoff(sb->buf, sb->len);
-
-	if (!has_signoff)
-		strbuf_addch(sb, '\n');
-
-	strbuf_addstr(sb, signed_off_by);
-	strbuf_add(sb, signoff, signoff_len);
-	strbuf_addch(sb, '\n');
-}
-
 static unsigned int digits_in_number(unsigned int number)
 {
 	unsigned int i = 10, result = 1;
@@ -669,8 +587,10 @@ void show_log(struct rev_info *opt)
 	/*
 	 * And then the pretty-printed message itself
 	 */
-	if (ctx.need_8bit_cte >= 0)
-		ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
+	if (ctx.need_8bit_cte >= 0 && opt->add_signoff)
+		ctx.need_8bit_cte =
+			has_non_ascii(fmt_name(getenv("GIT_COMMITTER_NAME"),
+					       getenv("GIT_COMMITTER_EMAIL")));
 	ctx.date_mode = opt->date_mode;
 	ctx.date_mode_explicit = opt->date_mode_explicit;
 	ctx.abbrev = opt->diffopt.abbrev;
@@ -683,7 +603,7 @@ void show_log(struct rev_info *opt)
 	pretty_print_commit(&ctx, commit, &msgbuf);
 
 	if (opt->add_signoff)
-		append_signoff(&msgbuf, opt->add_signoff);
+		append_signoff(&msgbuf, 0, APPEND_SIGNOFF_DEDUP);
 
 	if ((ctx.fmt != CMIT_FMT_USERFORMAT) &&
 	    ctx.notes_message && *ctx.notes_message) {