Function git_is_dirty

src/watcher/watcher.c:156–211

Returns true if working tree has changes (modified, untracked, etc.). * Also checks submodules via `git submodule foreach` to detect uncommitted * changes inside submodules that `git status` alone would not report. */

 * Also checks submodules via `git submodule foreach` to detect uncommitted
 * changes inside submodules that `git status` alone would not report. */
static bool git_is_dirty(const char *root_path) {
    char cmd[CBM_SZ_1K];
    snprintf(cmd, sizeof(cmd),
             "git --no-optional-locks -C \"%s\" status --porcelain "
             "--untracked-files=normal 2>%s",
             root_path, WATCHER_NULDEV);
    FILE *fp = cbm_popen(cmd, "r");
    if (!fp) {
        return false;
    }

    char line[CBM_SZ_256];
    bool dirty = false;
    if (fgets(line, sizeof(line), fp)) {
        size_t len = strlen(line);
        while (len > 0 && (line[len - SKIP_ONE] == '\n' || line[len - SKIP_ONE] == '\r')) {
            line[--len] = '\0';
        }
        if (len > 0) {
            dirty = true;
        }
    }
    cbm_pclose(fp);

    if (dirty) {
        return true;
    }

#if !defined(_WIN32)
    /* Check submodules: uncommitted changes inside a submodule are invisible
     * to the parent's git status. Use `git submodule foreach` as a portable
     * fallback (Apple Git lacks --recurse-submodules). POSIX-only: foreach takes
     * an inner shell command that cmd.exe cannot pass intact; the parent-repo
     * status check above already covers the common (non-submodule) case. */
    snprintf(cmd, sizeof(cmd),
             "git --no-optional-locks -C '%s' submodule foreach --quiet --recursive "
             "'git status --porcelain --untracked-files=normal 2>/dev/null' "
             "2>/dev/null",
             root_path);
    fp = cbm_popen(cmd, "r");
    if (!fp) {
        return false;
    }
    if (fgets(line, sizeof(line), fp)) {
        size_t len = strlen(line);
        while (len > 0 && (line[len - SKIP_ONE] == '\n' || line[len - SKIP_ONE] == '\r')) {
            line[--len] = '\0';
        }
        if (len > 0) {
            dirty = true;
        }
    }
    cbm_pclose(fp);
#endif
    return dirty;
}

/* Count tracked files via git ls-files */