root/builtin/check-ref-format.c

DEFINITIONS

1. collapse_slashes
2. check_ref_format_branch
3. cmd_check_ref_format

/*
 * 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 [--normalize] [<options>] <refname>\n"
"   or: git check-ref-format --branch <branchname-shorthand>";

/*
 * Return a copy of refname but with leading slashes removed and runs
 * of adjacent slashes replaced with single slashes.
 *
 * This function is similar to normalize_path_copy(), but stripped down
 * to meet check_ref_format's simpler needs.
 */
static char *collapse_slashes(const char *refname)
{
        char *ret = xmalloc(strlen(refname) + 1);
        char ch;
        char prev = '/';
        char *cp = ret;

        while ((ch = *refname++) != '\0') {
                if (prev == '/' && ch == prev)
                        continue;

                *cp++ = ch;
                prev = ch;
        }
        *cp = '\0';
        return ret;
}

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;
}

int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
{
        int i;
        int normalize = 0;
        int flags = 0;
        const char *refname;

        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]);

        for (i = 1; i < argc && argv[i][0] == '-'; i++) {
                if (!strcmp(argv[i], "--normalize") || !strcmp(argv[i], "--print"))
                        normalize = 1;
                else if (!strcmp(argv[i], "--allow-onelevel"))
                        flags |= REFNAME_ALLOW_ONELEVEL;
                else if (!strcmp(argv[i], "--no-allow-onelevel"))
                        flags &= ~REFNAME_ALLOW_ONELEVEL;
                else if (!strcmp(argv[i], "--refspec-pattern"))
                        flags |= REFNAME_REFSPEC_PATTERN;
                else
                        usage(builtin_check_ref_format_usage);
        }
        if (! (i == argc - 1))
                usage(builtin_check_ref_format_usage);

        refname = argv[i];
        if (normalize)
                refname = collapse_slashes(refname);
        if (check_refname_format(refname, flags))
                return 1;
        if (normalize)
                printf("%s\n", refname);

        return 0;
}