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-rw-r--r--builtin/check-ref-format.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/builtin/check-ref-format.c b/builtin/check-ref-format.c
new file mode 100644
index 0000000..ae3f281
--- /dev/null
+++ b/builtin/check-ref-format.c
@@ -0,0 +1,71 @@
+/*
+ * GIT - The information manager from hell
+ */
+
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+#include "strbuf.h"
+
+static const char builtin_check_ref_format_usage[] =
+"git check-ref-format [--print] <refname>\n"
+" or: git check-ref-format --branch <branchname-shorthand>";
+
+/*
+ * Replace each run of adjacent slashes in src with a single slash,
+ * and write the result to dst.
+ *
+ * This function is similar to normalize_path_copy(), but stripped down
+ * to meet check_ref_format's simpler needs.
+ */
+static void collapse_slashes(char *dst, const char *src)
+{
+ char ch;
+ char prev = '\0';
+
+ while ((ch = *src++) != '\0') {
+ if (prev == '/' && ch == prev)
+ continue;
+
+ *dst++ = ch;
+ prev = ch;
+ }
+ *dst = '\0';
+}
+
+static int check_ref_format_branch(const char *arg)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int nongit;
+
+ setup_git_directory_gently(&nongit);
+ if (strbuf_check_branch_ref(&sb, arg))
+ die("'%s' is not a valid branch name", arg);
+ printf("%s\n", sb.buf + 11);
+ return 0;
+}
+
+static int check_ref_format_print(const char *arg)
+{
+ char *refname = xmalloc(strlen(arg) + 1);
+
+ if (check_ref_format(arg))
+ return 1;
+ collapse_slashes(refname, arg);
+ printf("%s\n", refname);
+ return 0;
+}
+
+int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+{
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage(builtin_check_ref_format_usage);
+
+ if (argc == 3 && !strcmp(argv[1], "--branch"))
+ return check_ref_format_branch(argv[2]);
+ if (argc == 3 && !strcmp(argv[1], "--print"))
+ return check_ref_format_print(argv[2]);
+ if (argc != 2)
+ usage(builtin_check_ref_format_usage);
+ return !!check_ref_format(argv[1]);
+}