first attempt

Author: raymcdermott

Dockerfile

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+FROM vouchio/linuxkit-docker
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

README.md

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 # linuxkit-build
-A Github action to enable LinuxKit builds
+A Github action to enable LinuxKit OS image builds
+
+## Inputs
+
+### `config`
+
+**Required** LinuxKit YAML configuration to build (eg lxk-build.yml). There is no default.
+
+### `format`
+
+**Optional** The format for the output (eg `aws`, `gcp`, `iso-efi`, etc...). 
+
+**Default** `kernel+initrd`
+
+## Outputs
+
+### `files`
+
+The files that were built
+
+## Example usage - default
+
+```yaml 
+uses: actions/linuxkit-docker-action@v1
+with:
+  config: lxk-build.yml
+```
+
+## Example usage - AWS
+
+```yaml 
+uses: actions/linuxkit-docker-action@v1
+with:
+  config: lxk-build.yml
+  format: aws
+```
+
 
 # License
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

action.yml

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+name: linuxkit-builder
+author: 'Ray McDermott'
+description: 'Build multiarch OS images using LinuxKit'
+branding:
+  icon: package
+  color: purple
+inputs:
+  config:
+    description: 'LinuxKit YAML configuration to build (eg lxk-build.yml)'
+    required: true
+  format:
+    description: 'The output format (eg aws, gcp, iso-efi, etc...)'
+    required: false
+    default: 'kernel+initrd'
+outputs:
+  files:
+    description: 'The file(s) that were built'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.config }}
+    - ${{ inputs.format }}
+

entrypoint.sh

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+#!/usr/bin/env bash
+
+set -ex
+
+OUTPUT_DIR=/tmp/lxk-build
+
+mkdir ${OUTPUT_DIR}
+
+linuxkit build -dir ${OUTPUT_DIR} -format $2 $1
+
+files=$(find ${OUTPUT_DIR} -type f)
+
+echo ::set-output name=files::${files}