Missing dependency cache
========================

.. list-table::
   :stub-columns: 1
   :widths: 20 80

   * - Rule ID
     - ``caching_missing``
   * - Category
     - energy
   * - Severity
     - high

No cache action detected for package manager (pip, npm, gradle, cargo, etc.). Caching dependencies dramatically reduces build time and runner energy consumption.

Detection
---------

``pattern_matching`` — Regex or keyword matching on string field values.

Examples
--------

**Non-compliant:**

.. code-block:: yaml

   jobs:
     build:
       steps:
         - uses: actions/setup-node@v4
           with:
             node-version: 20
         - run: npm install

**Compliant:**

.. code-block:: yaml

   jobs:
     build:
       steps:
         - uses: actions/setup-node@v4
           with:
             node-version: 20
             cache: npm
         - run: npm install

**Fix**: Enable caching on the setup action (e.g. cache: npm on actions/setup-node) or add an explicit actions/cache step before the install step.