add setting to disable Aptfile usage

README.md

@@ -37,6 +37,7 @@ There are three kinds of version labels you can use.
 - `execute_install_scripts` - Execute Debian package pre and post install script upon restore. See [Caveats / Non-file Dependencies](#non-file-dependencies) for more information.
 - `empty_packages_behavior` - Desired behavior when the given `packages` is empty. `'error'` (default), `'warn'` or `'ignore'`.
 - `add-repository` - Space delimited list of repositories to add via `apt-add-repository` before installing packages. Supports PPA (e.g., `ppa:user/repo`) and other repository formats.
+- `use_aptfile` - Whether to read packages from `Aptfile` at repository root. Set to `false` to disable Aptfile usage even if `Aptfile` exists. Default is `true`.
 
 ### Outputs
 
@@ -164,6 +165,18 @@ You can also combine packages from both the input and `Aptfile`:
     packages: protobuf-compiler sd  # Additional packages beyond Aptfile
 ```
 
+### Disabling Aptfile Usage
+
+If you want to disable Aptfile reading even when an `Aptfile` exists in your repository, set `use_aptfile` to `false`:
+
+```yaml
+- uses: awalsh128/cache-apt-pkgs-action@latest
+  with:
+    version: v1
+    packages: cmake build-essential
+    use_aptfile: false  # Ignore Aptfile even if it exists
+```
+
 ## Caveats
 
 ### Non-file Dependencies

action.yml

@@ -39,6 +39,10 @@ inputs:
     description: 'Space delimited list of repositories to add via apt-add-repository before installing packages. Supports PPA (ppa:user/repo) and other repository formats.'
     required: false
     default: ''
+  use_aptfile:
+    description: 'Whether to read packages from Aptfile at repository root. Set to false to disable Aptfile usage even if Aptfile exists.'
+    required: false
+    default: 'true'
 
 outputs:
   cache-hit:
@@ -64,6 +68,7 @@ runs:
           "$EXEC_INSTALL_SCRIPTS" \
           "$DEBUG" \
           "$ADD_REPOSITORY" \
+          "$USE_APTFILE" \
           "$PACKAGES"
         if [ -f ~/cache-apt-pkgs/cache_key.md5 ]; then
           echo "CACHE_KEY=$(cat ~/cache-apt-pkgs/cache_key.md5)" >> $GITHUB_ENV
@@ -77,6 +82,7 @@ runs:
          EMPTY_PACKAGES_BEHAVIOR: "${{ inputs.empty_packages_behavior }}"
          DEBUG: "${{ inputs.debug }}"
          ADD_REPOSITORY: "${{ inputs.add-repository }}"
+         USE_APTFILE: "${{ inputs.use_aptfile }}"
          PACKAGES: "${{ inputs.packages }}"
 
     - id: load-cache

pre_cache_action.sh

@@ -27,24 +27,32 @@ debug="${4}"
 # Repositories to add before installing packages.
 add_repository="${5}"
 
+# Whether to use Aptfile
+use_aptfile="${6}"
+validate_bool "${use_aptfile}" use_aptfile 5
+
 # List of the packages to use.
-input_packages="${@:6}"
+input_packages="${@:7}"
 
 # Check for Aptfile at repository root and merge with input packages
 aptfile_path="${GITHUB_WORKSPACE:-.}/Aptfile"
 aptfile_packages=""
-if test -n "${GITHUB_WORKSPACE}" && test -f "${aptfile_path}"; then
-  log "Found Aptfile at ${aptfile_path}, parsing packages..."
-  aptfile_packages="$(parse_aptfile "${aptfile_path}")"
-  if test -n "${aptfile_packages}"; then
-    log "Parsed $(echo "${aptfile_packages}" | wc -w) package(s) from Aptfile"
+if test "${use_aptfile}" = "true"; then
+  if test -n "${GITHUB_WORKSPACE}" && test -f "${aptfile_path}"; then
+    log "Found Aptfile at ${aptfile_path}, parsing packages..."
+    aptfile_packages="$(parse_aptfile "${aptfile_path}")"
+    if test -n "${aptfile_packages}"; then
+      log "Parsed $(echo "${aptfile_packages}" | wc -w) package(s) from Aptfile"
+    else
+      log "Aptfile is empty or contains only comments"
+    fi
+  elif test -z "${GITHUB_WORKSPACE}"; then
+    log "GITHUB_WORKSPACE not set, skipping Aptfile check"
   else
-    log "Aptfile is empty or contains only comments"
+    log "No Aptfile found at ${aptfile_path}"
   fi
-elif test -z "${GITHUB_WORKSPACE}"; then
-  log "GITHUB_WORKSPACE not set, skipping Aptfile check"
 else
-  log "No Aptfile found at ${aptfile_path}"
+  log "Aptfile usage is disabled (use_aptfile=false)"
 fi
 
 # Merge input packages with Aptfile packages