mitts 0.3.30

Rust-first build and package tooling with a shared artifact cache
Documentation 
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# Mitts Build — save action: prune the Mitts store and save it to the Actions cache.
# Copyright (c) 2026 Alexander Panasenko
# Contact: alex@prod.codes
# Author: https://prod.codes/about/
# Project: https://github.com/alex09x/mitts
# SPDX-License-Identifier: MIT OR Apache-2.0
name: Save Mitts cache
description: Prune the Mitts store, then save it to the GitHub Actions cache. Run it after the setup action, with if always() when partial caches help.
author: Alexander Panasenko
branding:
  icon: package
  color: blue

inputs:
  max-bytes:
    description: Prune the store to at most this many bytes before saving, oldest objects first.
    required: false
    default: '2147483648'

runs:
  using: composite
  steps:
    - id: prune
      if: env.SETUP_MITTS_CACHE == 'true' && env.SETUP_MITTS_CACHE_HIT != 'true'
      shell: bash
      env:
        MAX_BYTES: ${{ inputs.max-bytes }}
      run: |
        set -euo pipefail
        [ -n "${SETUP_MITTS_CACHE_KEY:-}" ] && [ -d "${MITTS_CACHE_DIR:-}" ] || {
          echo 'Run the setup action first; nothing to save.' >&2
          exit 1
        }
        case "$MAX_BYTES" in ''|*[!0-9]*) echo 'max-bytes must be a whole number' >&2; exit 2 ;; esac
        # Prune before upload so the saved cache stays bounded and free of stale entries.
        mitts gc --cache-dir "$MITTS_CACHE_DIR" --max-bytes "$MAX_BYTES"
    - if: env.SETUP_MITTS_CACHE == 'true' && env.SETUP_MITTS_CACHE_HIT != 'true'
      uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
      with:
        path: ${{ env.MITTS_CACHE_DIR }}
        key: ${{ env.SETUP_MITTS_CACHE_KEY }}