Initial Release

Signed-off-by: Daniel Richter <[email protected]>

.github/workflows/pipeline.yaml

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+name: Build Pipeline
+
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+#      - uses: ./
+#        with:
+#          input: template.json
+#          output: deployment.json
+#        env:
+#          VERSION: 1.2.3
+#          INSTANCE: dev/develop
+#      - run: cat deployment.json

.gitignore

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+.idea/

Dockerfile

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+FROM alpine
+RUN apk --update add gettext
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod a+x /usr/local/bin/entrypoint.sh
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

README.md

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+# Envsubst Action 
+
+This action allows you to substitute environment variables in a file.
+
+## Usage
+
+template.json
+```json
+{
+  "version": "${VERSION}",
+  "instance": "${INSTANCE}"
+}
+```
+
+.github/workflows/pipeline.yaml
+```yaml
+- uses: danielr1996/[email protected]
+  with:
+    input: template.json
+    output: deployment.json
+    env:
+      VERSION: 1.2.3
+      INSTANCE: staging
+```
+
+
+deployment.json
+```json
+{
+  "version": "1.2.3",
+  "instance": "staging"
+}
+```

action.yml

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+name: 'envsubst-action'
+description: wrapper for envsubst
+author: 'Daniel Richter'
+branding:
+  icon: 'terminal'
+  color: 'yellow'
+inputs:
+  input:
+    description: 'File to run substitutions on'
+    required: true
+  output:
+    description: 'File to write result to'
+    required: true
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

entrypoint.sh

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+#!/bin/sh
+set -e
+envsubst < $INPUT_INPUT > $INPUT_OUTPUT