add read_author_script() to libgit

Add read_author_script() to sequencer.c based on the implementation in
builtin/am.c and update read_am_author_script() to use
read_author_script(). The sequencer code that reads the author script
will be updated in the next commit.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 84 deletions

diff --git a/builtin/am.c b/builtin/am.c
index c78a745289..83685180e0 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -261,36 +261,6 @@ static int read_state_file(struct strbuf *sb, const struct am_state *state,
 }
 
 /**
- * Take a series of KEY='VALUE' lines where VALUE part is
- * sq-quoted, and append <KEY, VALUE> at the end of the string list
- */
-static int parse_key_value_squoted(char *buf, struct string_list *list)
-{
-	while (*buf) {
-		struct string_list_item *item;
-		char *np;
-		char *cp = strchr(buf, '=');
-		if (!cp) {
-			np = strchrnul(buf, '\n');
-			return error(_("unable to parse '%.*s'"),
-				     (int) (np - buf), buf);
-		}
-		np = strchrnul(cp, '\n');
-		*cp++ = '\0';
-		item = string_list_append(list, buf);
-
-		buf = np + (*np == '\n');
-		*np = '\0';
-		cp = sq_dequote(cp);
-		if (!cp)
-			return error(_("unable to dequote value of '%s'"),
-				     item->string);
-		item->util = xstrdup(cp);
-	}
-	return 0;
-}
-
-/**
  * Reads and parses the state directory's "author-script" file, and sets
  * state->author_name, state->author_email and state->author_date accordingly.
  * Returns 0 on success, -1 if the file could not be parsed.
@@ -309,65 +279,13 @@ static int parse_key_value_squoted(char *buf, struct string_list *list)
 static int read_am_author_script(struct am_state *state)
 {
 	const char *filename = am_path(state, "author-script");
-	struct strbuf buf = STRBUF_INIT;
-	struct string_list kv = STRING_LIST_INIT_DUP;
-	int retval = -1; /* assume failure */
-	int i, name_i = -2, email_i = -2, date_i = -2, err = 0;
-	int fd;
 
 	assert(!state->author_name);
 	assert(!state->author_email);
 	assert(!state->author_date);
 
-	fd = open(filename, O_RDONLY);
-	if (fd < 0) {
-		if (errno == ENOENT)
-			return 0;
-		return error_errno(_("could not open '%s' for reading"),
-				   filename);
-	}
-	strbuf_read(&buf, fd, 0);
-	close(fd);
-	if (parse_key_value_squoted(buf.buf, &kv))
-		goto finish;
-
-	for (i = 0; i < kv.nr; i++) {
-		if (!strcmp(kv.items[i].string, "GIT_AUTHOR_NAME")) {
-			if (name_i != -2)
-				name_i = error(_("'GIT_AUTHOR_NAME' already given"));
-			else
-				name_i = i;
-		} else if (!strcmp(kv.items[i].string, "GIT_AUTHOR_EMAIL")) {
-			if (email_i != -2)
-				email_i = error(_("'GIT_AUTHOR_EMAIL' already given"));
-			else
-				email_i = i;
-		} else if (!strcmp(kv.items[i].string, "GIT_AUTHOR_DATE")) {
-			if (date_i != -2)
-				date_i = error(_("'GIT_AUTHOR_DATE' already given"));
-			else
-				date_i = i;
-		} else {
-			err = error(_("unknown variable '%s'"),
-				    kv.items[i].string);
-		}
-	}
-	if (name_i == -2)
-		error(_("missing 'GIT_AUTHOR_NAME'"));
-	if (email_i == -2)
-		error(_("missing 'GIT_AUTHOR_EMAIL'"));
-	if (date_i == -2)
-		error(_("missing 'GIT_AUTHOR_DATE'"));
-	if (date_i < 0 || email_i < 0 || date_i < 0 || err)
-		goto finish;
-	state->author_name = kv.items[name_i].util;
-	state->author_email = kv.items[email_i].util;
-	state->author_date = kv.items[date_i].util;
-	retval = 0;
-finish:
-	string_list_clear(&kv, !!retval);
-	strbuf_release(&buf);
-	return retval;
+	return read_author_script(filename, &state->author_name,
+				  &state->author_email, &state->author_date, 1);
 }
 
 /**