CI: cache apt packages

[hagenw]

Use awalsh128/cache-apt-pkgs-action to cache apt packages, which caused very slow CI pipelines from time to time before.

[sourcery-ai]

Reviewer's Guide

Replaces inline apt-get install steps in CI workflows with the cache-apt-pkgs GitHub Action to cache and reuse apt packages across runs, aiming to reduce pipeline flakiness and runtime.

Flow diagram for cache-apt-pkgs CI step behavior

flowchart TD
    start[Start_CI_job]
    step[Run_cache_apt_pkgs_step]
    computeKey[Compute_cache_key_from_packages_and_version]
    checkCache{Cache_hit_for_key?}
    useCache[Use_cached_deb_packages_and_installed_binaries]
    installApt[Install_packages_via_apt_get]
    saveCache[Save_downloaded_packages_to_cache]
    nextStep[Run_subsequent_steps_such_as_build_docs_and_tests]
    endJob[End_CI_job]

    start --> step --> computeKey --> checkCache
    checkCache -->|Yes| useCache --> nextStep
    checkCache -->|No| installApt --> saveCache --> nextStep
    nextStep --> endJob

Loading

File-Level Changes

Change	Details	Files
Switch Ubuntu libsndfile installation in tests workflow to use cache-apt-pkgs action with a fixed cache version.	Replace shell-based apt-get update/install step with awalsh128/cache-apt-pkgs-action usage. Configure the action to install the libsndfile1 package only on ubuntu-latest matrix jobs. Pin the cache version to 1.0 to control cache invalidation.	.github/workflows/test.yml
Switch Ubuntu ffmpeg and mediainfo installation in tests workflow to use cache-apt-pkgs action with a fixed cache version.	Replace combined apt-get update/install step with awalsh128/cache-apt-pkgs-action usage. Configure the action to install both ffmpeg and mediainfo packages for ubuntu-latest jobs. Pin the cache version to 1.0 for these media packages to manage cache refresh.	.github/workflows/test.yml
Use cache-apt-pkgs for Ubuntu libsndfile and graphviz installation in docs workflow.	Replace separate apt-get update/install steps for libsndfile1 with cache-apt-pkgs action. Replace direct apt-get install for graphviz with cache-apt-pkgs action. Set a shared cache version 1.0 for both libsndfile1 and graphviz installations.	.github/workflows/doc.yml
Use cache-apt-pkgs for all documentation-related apt packages in publish workflow.	Replace multi-line apt-get install of libsndfile1, sox, and graphviz with a single cache-apt-pkgs action invocation. Configure the action to install all three packages together to benefit from a unified cache. Pin cache version to 1.0 for these publish-time documentation dependencies.	.github/workflows/publish.yml

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