Merge pull request #11 from dawitnida/feature/build-action

Packer GitHub build action included

Author: dawitnida

build/Dockerfile

@@ -0,0 +1,17 @@
+FROM hashicorp/packer:1.3.5
+
+LABEL "com.github.actions.name" = "packer-build"
+LABEL "com.github.actions.description" = "Build packer template file in a directory"
+LABEL "com.github.actions.icon" = "circle"
+LABEL "com.github.actions.color" = "blue"
+
+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 add --no-cache jq
+RUN apk add --no-cache curl
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

build/README.md

@@ -0,0 +1,69 @@
+# Packer Build Action
+
+Runs `packer build *.json` on release to validate and build image based on the template file in a directory
+This depends on the packer validate action, if the validation fails, it will print out error as pull request comment.
+Check out the inspect, validate actions and [packer build command][packer-build-doc] for further reference. 
+
+## Usage
+
+To check this in action, please check [Packer actions demo project][packer-actions-demo] with a collection
+of sample packer template files. 
+
+Variables 
+
+- `PACKER_ACTION_WORKING_DIR` : Working directory
+- `TEMPLATE_FILE_NAME` : Packer template file
+- `ACTION_COMMENT` : Enable/Disable PR comment from validate result
+
+```
+workflow "packer build template-y" {
+  resolves = "packer-build-template-y"
+  on = "release"
+}
+
+action "packer-build-template-y" {
+  uses = "dawitnida/packer-github-actions/build@master"
+  needs = "packer-inspect-template-y"
+  secrets = [
+    "GITHUB_TOKEN",
+  ]
+  env = {
+    TEMPLATE_FILE_NAME = "packer-template-y.json"
+  }
+}
+
+action "filter-open-synced-pr" {
+  uses = "actions/bin/filter@master"
+  args = "action 'opened|synchronize'"
+}
+
+workflow "packer inspect & validate template-y" {
+  resolves = "packer-inspect-template-y"
+  on = "pull_request"
+}
+
+action "packer-validate-template-y" {
+  uses = "dawitnida/packer-github-actions/validate@master"
+  needs = "filter-open-synced-pr"
+  secrets = [
+    "GITHUB_TOKEN",
+  ]
+  env = {
+    TEMPLATE_FILE_NAME = "packer-template-y.json"
+  }
+}
+
+action "packer-inspect-template-y" {
+  uses = "dawitnida/packer-github-actions/inspect@master"
+  needs = "packer-validate-template-y"
+  secrets = [
+    "GITHUB_TOKEN",
+  ]
+  env = {
+    TEMPLATE_FILE_NAME = "packer-template-y.json"
+  }
+}
+```
+
+[packer-build-doc]:     <https://www.packer.io/docs/commands/build.html>
+[packer-actions-demo]:  <https://github.com/dawitnida/packer-actions-demo>

build/entrypoint.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+set -e
+
+# Set the working directory for the template
+cd "${PACKER_ACTION_WORKING_DIR:-.}"
+
+# Selected template file
+if [[ ! -f "$TEMPLATE_FILE_NAME" ]] && [[ $TEMPLATE_FILE_NAME != *.json ]]; then
+    echo "${TEMPLATE_FILE_NAME} does not exit in the working directory (${PACKER_ACTION_WORKING_DIR})"
+    echo ""
+    echo "Setting the file to default."
+fi
+
+set +e
+# Run packer template validator
+BUILD_OUTPUT=$(sh -c "packer build $* ${TEMPLATE_FILE_NAME}" 2>&1)
+BUILD_SUCCESS=$?
+echo "$BUILD_OUTPUT"
+set -e
+
+# Capture the result and construct comment
+BUILD_COMMENT=""
+if [ $BUILD_SUCCESS -ne 0 ]; then
+    BUILD_COMMENT="#### \`packer build \` Failed
+\`\`\`
+$BUILD_OUTPUT
+\`\`\`
+
+- Template: ${TEMPLATE_FILE_NAME}
+- Workflow: ${GITHUB_WORKFLOW}
+- Action: ${GITHUB_ACTION}
+- Reference: ${GITHUB_REF}"
+
+else
+    BUILD_COMMENT="#### \`packer build\` Success
+\`\`\`
+$BUILD_OUTPUT
+\`\`\`
+
+- Template: ${TEMPLATE_FILE_NAME}
+- Workflow: ${GITHUB_WORKFLOW}
+- Action: ${GITHUB_ACTION}
+- Reference: ${GITHUB_REF}"
+
+fi
+
+# Enable/disable comment on build action on the PR
+if [[ "$ACTION_COMMENT" == "1" ]] || [[ "$ACTION_COMMENT" == "false" ]]; then
+    exit $BUILD_SUCCESS
+fi
+
+# Spit out the validation output for reference as PR comment
+BUILD_PAYLOAD=$(echo '{}' | jq --arg body "$BUILD_COMMENT" '.body = $body')
+BUILD_COMMENTS_URL=$(cat /github/workflow/event.json | jq -r .pull_request.comments_url)
+/usr/bin/curl -s -S -H "Authorization: token $GITHUB_TOKEN" --header "Content-Type: application/json" --data "$BUILD_PAYLOAD" "$BUILD_COMMENTS_URL" > /dev/null
+
+exit $BUILD_SUCCESS