init

.github/main.workflow

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+workflow "Trigger: Push" {
+  on = "push"
+  resolves = [
+    "Shellcheck",
+    "Black Code Formatter",
+  ]
+}
+
+action "Shellcheck" {
+  uses = "ludeeus/action-shellcheck@master"
+}
+
+action "Black Code Formatter" {
+  uses = "lgeiger/black-action@master"
+  args = "$GITHUB_WORKSPACE --check"
+}

Dockerfile

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+FROM debian:latest
+
+COPY runaction.sh /runaction.sh
+RUN chmod +x /runaction.sh
+RUN apt update
+RUN apt install -y shellcheck
+
+ENTRYPOINT ["/runaction.sh"]
+
+LABEL "name"="shellcheck"
+LABEL "maintainer"="Ludeeus <ludeeus@gmail.com>"
+LABEL "version"="0.0.1"
+LABEL "com.github.actions.name"="shellcheck"
+LABEL "com.github.actions.description"="Run shell check on ALL sh files in the repository."
+LABEL "com.github.actions.icon"="terminal"
+LABEL "com.github.actions.color"="black"

README.md

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+# SHELLCHECK
+
+[![BuyMeCoffee][buymecoffeebedge]][buymecoffee]
+
+_Run shellcheck on ALL sh files in the repository._
+
+## Example
+
+```
+workflow "Shellcheck" {
+  on = "push"
+  resolves = [
+    "Shellcheck",
+  ]
+}
+
+
+action "Shellcheck" {
+  uses = "ludeeus/actions/shellcheck@master"
+}
+```
+
+[buymecoffee]: https://www.buymeacoffee.com/ludeeus
+[buymecoffeebedge]: https://camo.githubusercontent.com/cd005dca0ef55d7725912ec03a936d3a7c8de5b5/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6275792532306d6525323061253230636f666665652d646f6e6174652d79656c6c6f772e737667

runaction.sh

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+#!/bin/bash
+
+cd "$GITHUB_WORKSPACE" || exit 1
+find . -name \*.sh -exec shellcheck {} +