+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <stdio.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+
+/* Summary line is form '<identifier> - ' (spaces for 'struct foo -') */
+/* slightly modified from doc_extract-core.c */
+static unsigned int is_summary_line(const char *line)
+{
+ unsigned int id_len;
+
+ id_len = strspn(line, IDENT_CHARS" *");
+ if (id_len == 0)
+ return 0;
+ if (strspn(line, " ") == id_len)
+ return 0;
+ if (!strstarts(line + id_len-1, " - "))
+ return 0;
+ return id_len - 1;
+}
+
+static void check_info_summary_single_line(struct manifest *m,
+ bool keep,
+ unsigned int *timeleft,
+ struct score *score)
+{
+ int i = 0;
+ get_ccan_line_info(m->info_file);
+ score->total = 1;
+ for (i = 0; i < m->info_file->num_lines; ++i) {
+ if (is_summary_line(m->info_file->lines[i])) {
+ if (strspn(m->info_file->lines[i+1], " *") == strlen(m->info_file->lines[i+1])) {
+ /* valid summary line */
+ score->error = NULL;
+ score->pass = true;
+ score->score = 1;
+ } else {
+ /* invalid summary line - line following summary line should be empty */
+ score->pass = false;
+ score->score = 0;
+ score->error = "invalid summary line - not on a single line:";
+ score_file_error(score, m->info_file, i+1, "summary is not on a single line");
+ }
+ break;
+ }
+ }
+}
+
+
+struct ccanlint info_summary_single_line = {
+ .key = "info_summary_single_line",
+ .name = "Module has a single line summary in _info",
+ .check = check_info_summary_single_line,
+ .needs = "info_exists"
+};
+
+REGISTER_TEST(info_summary_single_line);