Function looksLikeSHA

pkg/github/repositories_helper.go:166–176

looksLikeSHA returns true if the string appears to be a Git commit SHA. A SHA is a 40-character hexadecimal string.

(s string)

// looksLikeSHA returns true if the string appears to be a Git commit SHA.
// A SHA is a 40-character hexadecimal string.
func looksLikeSHA(s string) bool {
	if len(s) != 40 {
		return false
	}
	for _, c := range s {
		if (c < '0' || c > '9') && (c < 'a' || c > 'f') && (c < 'A' || c > 'F') {
			return false
		}
	}
	return true
}

// resolveGitReference takes a user-provided ref and sha and resolves them into a
// definitive commit SHA and its corresponding fully-qualified reference.