Merge pull request #1 from dawitnida/feature/Dockerfile

Include Dockerfile for packer validate action.

.gitignore

@@ -0,0 +1,9 @@
+### Packer template
+# Cache objects
+packer_cache/
+
+# For built boxes
+*.box
+
+.idea/*
+

validate/Dockerfile

@@ -0,0 +1,16 @@
+FROM hashicorp/packer:1.3.5
+
+LABEL "com.github.actions.name" = "packer-validate"
+LABEL "com.github.actions.description" = "Validate packer template file in a directory"
+LABEL "com.github.actions.icon" = "alert-circle"
+LABEL "com.github.actions.color" = "orange"
+
+LABEL "repository" = "https://github.com/dawitnida/packer-github-actions"
+LABEL "homepage" = "https://github.com/dawitnida/packer-github-actions"
+LABEL "maintainer" = "Dawit Nida <dawit@dawitnida.com>"
+
+RUN apk --no-cache add jq
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

validate/entrypoint.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+
+set +e
+# Run packer template validator
+VALIDATE_OUTPUT=$(sh -c "packer validate -no-color $*" 2>&1)
+VALIDATE_SUCCESS=$?
+echo "$VALIDATE_OUTPUT"
+set -e
+
+# Capture the result
+if [ $VALIDATE_SUCCESS -eq 0 ]; then
+    exit 0
+fi
+
+# Spit out the validation output for reference
+VALIDATE_COMMENT="#### \`packer validate\` Failed
+\`\`\`
+$VALIDATE_OUTPUT
+\`\`\`"
+VALIDATE_PAYLOAD=$(echo '{}' | jq --arg body "$VALIDATE_COMMENT" '.body = $body')
+VALIDATE_COMMENTS_URL=$(cat /github/workflow/event.json | jq -r .pull_request.comments_url)
+curl -s -S -H "Authorization: token $GITHUB_TOKEN" --header "Content-Type: application/json" --data "$VALIDATE_PAYLOAD" "$VALIDATE_COMMENTS_URL" > /dev/null
+
+exit $VALIDATE_SUCCESS