Check markdown files

.github/main.workflow

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+workflow "New workflow" {
+  on = "push"
+  resolves = ["markdown-link-check"]
+}
+
+action "markdown-link-check" {
+  uses = "./"
+}

Dockerfile

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+FROM alpine:3.8
+RUN apk add --no-cache bash nodejs npm
+LABEL "com.github.actions.name"="markdown-link-check"
+LABEL "com.github.actions.description"="Check if all links are valid in markdown files."
+LABEL "com.github.actions.icon"="link"
+LABEL "com.github.actions.color"="green"
+LABEL "repository"="https://github.com/gaurav-nelson/github-action-markdown-link-check.git"
+LABEL "homepage"="https://github.com/gaurav-nelson/github-action-markdown-link-check"
+LABEL "maintainer"="Gaurav Nelson"
+ADD entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

README.md

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-# github-action-markdown-link-check
-Check all links in markdown files if they are alive or dead.
+# GitHub Action - Markdown link check 🔗✔️
+This GitHub action checks all Markdown files in your repository for broken links. (Uses [tcort/markdown-link-check](https://github.com/tcort/markdown-link-check))
+
+## Sample workflow
+```
+workflow "New workflow" {
+  on = "push"
+  resolves = ["markdown-link-check"]
+}
+
+action "markdown-link-check" {
+  uses = "./"
+}
+```
+
+## Test links
+
+www.google.com
+
+[This is a broken link](www.exampleexample.cox)

entrypoint.sh

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+#!/usr/bin/env bash
+
+set -eu
+
+npm i -g markdown-link-check
+
+echo "=========================> MARKDOWN LINK CHECK <========================="
+
+find . -name \*.md -not -path "./node_modules/*" -exec markdown-link-check {} \; 2> error.txt
+
+echo "========================================================================="
+
+if [ -e error.txt ] ; then
+  if grep -q "ERROR:" error.txt; then
+    exit 113
+  fi
+fi