feat: add action outputs (#47)

* Create and document action outputs

* Use outputs in upload artifact step

.github/workflows/test-iso.yml

@@ -44,6 +44,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build ISO
+        id: build-iso
         uses: ./
         with:
           ARCH: 'x86_64'
@@ -60,7 +61,9 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: base-main-${{ matrix.version }}${{ matrix.SECURE_BOOT_STRING }}.iso
-          path: end_iso/*
+          path: |
+            ${{ steps.build-iso.outputs.iso-path }}
+            ${{ steps.build-iso.outputs.checksum-path }}
           if-no-files-found: error
           retention-days: 0
           compression-level: 0

README.md

@@ -35,6 +35,9 @@ sudo podman run --rm --privileged --volume .:/isogenerator/output -e VERSION=39
 ```
 
 ## Customizing
+
+### Inputs
+
 The following variables can be used to customize the create image.
 
 | Variable            | Description                                                  | Default Value          |
@@ -56,6 +59,16 @@ The following variables can be used to customize the create image.
 
 Our public key for our kmods is located here: https://github.com/ublue-os/akmods/raw/main/certs/public_key.der
 
+### Outputs
+
+This action outputs some useful values for you to use further on in your workflow.
+
+| Output | Description |
+| ------ | ----------- |
+| output-directory | The directory containing ISO and checksum files |
+| iso-path | The full path to the ISO file |
+| checksum-path | The full path to the checksum file |
+
 ## VSCode Dev Container
 There is a dev container configuration provided for development. By default it will use the existing container image available at `ghcr.io/ublue-os/isogenerator`, however, you can have it build a new image by editing `.devcontainer/devcontainer.json` and replacing `image` with `build`. `Ctrl+/` can be used to comment and uncomment blocks of code within VSCode.
 

action.yml

@@ -48,6 +48,14 @@ inputs:
     required: false
     default: ${{ github.ref }}
 
+outputs:
+  output-directory:
+    value: ${{ steps.final.outputs.OUTPUT_DIR }}
+  iso-path: 
+    value: ${{ steps.final.outputs.ISO_PATH }}
+  checksum-path: 
+    value: ${{ steps.final.outputs.CHECKSUM_PATH }} 
+
 runs:
   using: composite
   steps:
@@ -120,6 +128,7 @@ runs:
 
     - name: Create deploy.iso and generate sha256 checksum
       shell: bash
+      id: final
       run: |
         make ${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}.iso \
           ARCH=${{ inputs.ARCH }} \
@@ -132,3 +141,7 @@ runs:
         mkdir end_iso
         sha256sum ${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}.iso > ./end_iso/${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}-CHECKSUM
         mv ${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}.iso end_iso/
+        
+        echo "OUTPUT_DIR=$(realpath ./end_iso)" >> $GITHUB_OUTPUT
+        echo "ISO_PATH=$(realpath ./end_iso/${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}.iso)" >> $GITHUB_OUTPUT
+        echo "CHECKSUM_PATH=$(realpath ./end_iso/${{ inputs.IMAGE_NAME }}-${{ inputs.IMAGE_TAG || inputs.VERSION }}-CHECKSUM)" >> $GITHUB_OUTPUT