created action

Dockerfile

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+FROM alpine
+
+RUN apk add --update --no-cache \
+    ca-certificates \
+    wget \
+    bash 
+
+RUN wget https://github.com/concourse/concourse/releases/download/v5.8.0/fly-5.8.0-linux-amd64.tgz && \
+    tar xf fly*.tgz -C /usr/local/bin/ && \
+    chmod +x /usr/local/bin/fly
+
+COPY entrypoint.sh /entrypoint.sh
+
+CMD ["sh", "/entrypoint.sh"]
+

action.yml

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+name: Validate Pipeline
+description: "Validate pipeline yamls"
+runs:
+    using: 'docker'
+    image: 'Dockerfile'

entrypoint.sh

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+#!/bin/bash
+
+set -eu
+
+validator="$(fly5 -t cc validate-pipeline -c ci/config/pipelines/aws-prod/deploy-pipeline.yml)"
+
+if [[ $validator != *"looks good"* ]]; then
+    command || exit 1
+fi
+