sequencer: make read_oneliner() extern

The function read_oneliner() is a generally useful util function.
Instead of hiding it as a static function within sequencer.c, extern it
so that it can be reused by others.

This patch is best viewed with --color-moved.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/sequencer.h b/sequencer.h
index 718a074..ab43717 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -198,6 +198,20 @@ void print_commit_summary(struct repository *repo,
 			  const struct object_id *oid,
 			  unsigned int flags);
 
+#define READ_ONELINER_SKIP_IF_EMPTY (1 << 0)
+#define READ_ONELINER_WARN_MISSING (1 << 1)
+
+/*
+ * Reads a file that was presumably written by a shell script, i.e. with an
+ * end-of-line marker that needs to be stripped.
+ *
+ * Note that only the last end-of-line marker is stripped, consistent with the
+ * behavior of "$(cat path)" in a shell script.
+ *
+ * Returns 1 if the file was read, 0 if it could not be read or does not exist.
+ */
+int read_oneliner(struct strbuf *buf,
+	const char *path, unsigned flags);
 int read_author_script(const char *path, char **name, char **email, char **date,
 		       int allow_missing);
 void parse_strategy_opts(struct replay_opts *opts, char *raw_opts);