[PATCH] bisect--helper: convert a function in shell to C

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Convert the code literally without changing its design even though it
seems that its obscure as to the use of comparing revision to different bisect
arguments which seems like a problem in shell because of the way
function arguments are handled.

Signed-off-by: Pranit Bauva <pranit.bauva@xxxxxxxxx>
---
 builtin/bisect--helper.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 3324229..61abe68 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -2,12 +2,35 @@
 #include "cache.h"
 #include "parse-options.h"
 #include "bisect.h"
+#include "refs.h"
 
 static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --next-all [--no-checkout]"),
 	NULL
 };
 
+static int check_term_format(const char *term, const char *revision, int flag) {
+	if (check_refname_format(term, flag))
+		die("'%s' is not a valid term", term);
+
+	if (!strcmp(term, "help") || !strcmp(term, "start") ||
+		!strcmp(term, "skip") || !strcmp(term, "next") ||
+		!strcmp(term, "reset") || !strcmp(term, "visualize") ||
+		!strcmp(term, "replay") || !strcmp(term, "log") ||
+		!strcmp(term, "run"))
+		die("can't use the builtin command '%s' as a term", term);
+
+	if (!strcmp(term, "bad") || !strcmp(term, "new"))
+		if(strcmp(revision, "bad"))
+			die("can't change the meaning of term '%s'", term);
+
+	if (!strcmp(term, "good") || !strcmp(term, "old"))
+		if (strcmp(revision, "good"))
+			die("can't change the meaning of term '%s'", term);
+
+	return 1;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	int next_all = 0;

--
https://github.com/git/git/pull/216
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