Function cbm_ensure_path

src/cli/cli.c:2299–2343

/* ── PATH management ──────────────────────────────────────────── */

int cbm_ensure_path(const char *bin_dir, const char *rc_file, bool dry_run) {
    if (!bin_dir || !rc_file) {
        return CLI_ERR;
    }

    /* fish uses a different syntax than POSIX shells: `export PATH="...:$PATH"`
     * is a syntax error in fish and breaks config.fish (#319). When the target
     * is a fish config, emit the fish-native `fish_add_path` (idempotent,
     * prepends only if absent) instead. */
    size_t rc_len = strlen(rc_file);
    bool is_fish = rc_len >= CBM_SZ_5 && strcmp(rc_file + rc_len - CBM_SZ_5, ".fish") == 0;

    char line[CLI_BUF_1K];
    if (is_fish) {
        snprintf(line, sizeof(line), "fish_add_path %s", bin_dir);
    } else {
        snprintf(line, sizeof(line), "export PATH=\"%s:$PATH\"", bin_dir);
    }

    /* Check if already present in rc file */
    FILE *f = fopen(rc_file, "r");
    if (f) {
        char buf[CLI_BUF_2K];
        while (fgets(buf, sizeof(buf), f)) {
            if (strstr(buf, line)) {
                (void)fclose(f);
                return CLI_TRUE; /* already present */
            }
        }
        (void)fclose(f);
    }

    if (dry_run) {
        return 0;
    }

    f = fopen(rc_file, "a");
    if (!f) {
        return CLI_ERR;
    }

    (void)fprintf(f, "\n# Added by codebase-memory-mcp install\n%s\n", line);
    (void)fclose(f);
    return 0;
}

/* ── Tar.gz extraction ────────────────────────────────────────── */