A sample files of GitHub Actions

00Overview

.github
├── hadolint
│   ├── Dockerfile (hadolint_Dockerfile)
│   └── entrypoint.sh (hadolint_entrypoint.sh)
├── main.workflow (01main.workflow)
└── shellcheck
    ├── Dockerfile (shellcheck_Dockerfile)
    └── entrypoint.sh (shellcheck_entrypoint.sh)

01main.workflow

workflow "masutaka.net" {
  on       = "push"
  resolves = ["hadolint", "shellcheck"]
}

action "hadolint" {
  uses = "./.github/hadolint"
  args = ["Dockerfile*", ".github/**/Dockerfile"]
}

action "shellcheck" {
  uses = "./.github/shellcheck"
  args = ["script/*", ".github/**/entrypoint.sh"]
}

hadolint_Dockerfile

FROM alpine:3.8

LABEL "com.github.actions.icon"="target"
LABEL "com.github.actions.color"="blue"

RUN apk add --no-cache --no-progress curl=7.61.1-r1

ENV HADOLINT_VERSION=v1.15.0 \
	HADOLINT_PATH=/usr/local/bin/hadolint
RUN curl -sLo $HADOLINT_PATH https://github.com/hadolint/hadolint/releases/download/${HADOLINT_VERSION}/hadolint-Linux-x86_64 && \
	chmod 500 $HADOLINT_PATH

COPY entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

hadolint_entrypoint.sh

#!/bin/sh -eux
# shellcheck disable=SC2068

hadolint -v
hadolint $@

shellcheck_Dockerfile

FROM alpine:3.8

LABEL "com.github.actions.icon"="terminal"
LABEL "com.github.actions.color"="purple"

RUN apk add --no-cache --no-progress curl=7.61.1-r1

ENV SHELLCHECK_VERSION=v0.6.0
WORKDIR /usr/local/bin
SHELL ["/bin/ash", "-o", "pipefail", "-c"]
RUN curl -s https://storage.googleapis.com/shellcheck/shellcheck-${SHELLCHECK_VERSION}.linux.x86_64.tar.xz | \
	tar xvJf - --strip-components=1 shellcheck-${SHELLCHECK_VERSION}/shellcheck
WORKDIR /

COPY entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

shellcheck_entrypoint.sh

#!/bin/sh -eux
# shellcheck disable=SC2068

shellcheck -V
shellcheck $@