.drone.yml

@@ -9,8 +9,11 @@ workspace:
 steps:
 
   - name: test
-    image: iamthefij/drone-pre-commit@sha256:6ed8dae6b0067bd2e145e36421bcfbbc68975ff7ddaa5a3f285b5bcdaf0989c8
+    image: python:3-slim
     commands:
+      - apt-get update
+      - apt-get install -y --no-install-recommends make shellcheck
+      - pip install docker-compose
       - make all
 
   - name: notify

.pre-commit-config.yaml

@@ -1,14 +0,0 @@
-repos:
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.2.0
-    hooks:
-      - id: trailing-whitespace
-      - id: end-of-file-fixer
-      - id: check-yaml
-        args:
-          - --allow-multiple-documents
-      - id: check-merge-conflict
-  - repo: https://github.com/shellcheck-py/shellcheck-py
-    rev: v0.7.1.1
-    hooks:
-      - id: shellcheck

.pre-commit-hooks.yaml

@@ -1,7 +1,19 @@
 ---
 - id: docker-compose-check
-  name: Validate docker compose files
-  description: Checks that docker compose files are valid
+  name: Validate docker-compose files
+  description: Checks that docker-compose files are valid
   language: script
   entry: compose-check.sh
-  files: (docker-)?compose\.ya?ml$
+  files: docker-compose.y[a]{0,1}ml$
+- id: hadolint
+  name: Lint Dockerfiles
+  description: Runs hadolint Docker image to lint Dockerfiles
+  language: docker_image
+  entry: hadolint/hadolint hadolint
+  files: Dockerfile
+- id: hadolint-system
+  name: Lint Dockerfiles
+  description: Runs system hadolint to lint Dockerfiles
+  language: system
+  entry: hadolint
+  files: Dockerfile

Makefile

@@ -1,8 +1,12 @@
 .PHONY: all test clean
 
-all: check test
+all: test shellcheck
 
-test: test-negative test-positive test-hooks
+test: test-negative test-positive
+
+.PHONY: shellcheck
+shellcheck:
+	shellcheck *.sh
 
 .PHONY: test-positive
 test-positive:
@@ -15,17 +19,3 @@ test-negative:
 	./compose-check.sh tests/docker-compose.bad.yml && { echo 'fail'; exit 1; } || echo 'ok'
 	@echo "Check multiple files. Should error."
 	./compose-check.sh tests/docker-compose* && { echo 'fail'; exit 1; } || echo 'ok'
-
-.PHONY: test-hooks
-test-hooks:
-	pre-commit try-repo . --all-files
-
-# Installs pre-commit hooks
-.PHONY: install-hooks
-install-hooks:
-	pre-commit install --install-hooks
-
-# Checks files for encryption
-.PHONY: check
-check:
-	pre-commit run --all-files

README.md

@@ -2,21 +2,13 @@
 
 A set of [pre-commit](http://pre-commit.com) hooks for Docker services
 
-# Installation
-
-Add the following to your `.pre-commit-config.yaml` file
-
-```yaml
-  - repo: https://github.com/iamthefij/docker-pre-commit
-    rev: master
-    hooks:
-      - id: docker-compose-check
-```
-
-and then run `pre-commit autoupdate`.
-
-
 ## Hooks
 
 ### docker-compose-check
-Verifies that docker compose files are valid by using `docker compose config` to parse them.
+Verifies that docker-compose files are valid by using `docker-compose config` to parse them.
+
+### hadolint
+Uses the [hadolint Docker image](https://hub.docker.com/hadolint/hadolint) to lint Dockerfiles.
+
+### hadolint-system
+Uses the whatever version of hadolint that you have installed to lint Dockerfiles. This requires you to have hadolint installed somewhere in your path.

compose-check.sh

@@ -1,41 +1,20 @@
-#! /usr/bin/env bash
+#! /bin/bash
 # Verifies that files passed in are valid for docker-compose
 set -e
 
-# Check if docker or podman commands are available
-if [[ -z "${CONTAINER_ENGINE}" ]]; then
-    if command -v docker &>/dev/null; then
-        CONTAINER_ENGINE=docker
-    elif command -v podman &>/dev/null; then
-        CONTAINER_ENGINE=podman
-    else
-        echo "ERROR: Neither 'docker' or 'podman' were found"
-        exit 1
-    fi
-fi
-
-if command -v "${CONTAINER_ENGINE}" &>/dev/null && ${CONTAINER_ENGINE} help compose &> /dev/null; then
-    COMPOSE="${CONTAINER_ENGINE} compose"
-elif command -v "${CONTAINER_ENGINE}-compose" &> /dev/null; then
-    COMPOSE="${CONTAINER_ENGINE}-compose"
-else
-    echo "ERROR: Neither '${CONTAINER_ENGINE}-compose' or '${CONTAINER_ENGINE} compose' were found"
-    exit 1
-fi
-
 check_file() {
     local file=$1
-    env $COMPOSE --file "$file" config --quiet 2>&1 |
-        sed "/variable is not set. Defaulting/d"
+    docker-compose -f "$file" config -q 2>&1 \
+        | sed "/variable is not set. Defaulting/d"
     return "${PIPESTATUS[0]}"
 }
 
 check_files() {
     local all_files=( "$@" )
     has_error=0
-    for file in "${all_files[@]}"; do
+    for file in "${all_files[@]}" ; do
         if [[ -f "$file" ]]; then
-            if ! check_file "$file"; then
+            if ! check_file "$file" ; then
                 echo "ERROR: $file"
                 has_error=1
             fi
@@ -44,8 +23,8 @@ check_files() {
     return $has_error
 }
 
-if ! check_files "$@"; then
-    echo "Some compose files failed"
+if ! check_files "$@" ; then
+    echo "To ignore, use --no-verify"
 fi
 
 exit $has_error