Function path_is_absolute

src/git/git_context.c:89–101

}

static bool path_is_absolute(const char *path) {
    if (!path || !path[0]) {
        return false;
    }
    if (path[0] == '/') {
        return true;
    }
#ifdef _WIN32
    return isalpha((unsigned char)path[0]) && path[1] == ':';
#else
    return false;
#endif
}

static char *join_root_relative(const char *root, const char *rel) {
    if (!root || !root[0]) {