[PATCH 1/2] bisect--helper: `is_expected_rev` shell function in C

[Pranit Bauva <pranit.bauva@gmail.com>]

Reimplement `is_expected_rev` shell function in C. This will further be
called from `check_expected_revs` function. This is a quite small
function thus subcommand facility is redundant.

Mentored-by: Lars Schneider <larsxschneider@gmail.com>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
---
This applies on the previous patches.

 builtin/bisect--helper.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 4153e8a..06bc9b8 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -160,6 +160,20 @@ int bisect_reset(const char *commit)
 	return bisect_clean_state();
 }
 
+static int is_expected_rev(const char *expected_hex)
+{
+	struct strbuf actual_hex = STRBUF_INIT;
+
+	if (!file_exists(git_path_bisect_expected_rev()))
+		return 0;
+
+	if (!strbuf_read_file(&actual_hex, git_path_bisect_expected_rev(), 0))
+		return 0;
+
+	strbuf_trim(&actual_hex);
+	return !strcmp(actual_hex.buf, expected_hex);
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
-- 
2.8.3