Merge pull request #238 from Automattic/add-entrypoints-feature

feat: add `entrypoints` feature

.github/workflows/test-features.yml

@@ -32,6 +32,7 @@ jobs:
           - cron
           - dev-tools
           - elasticsearch
+          - entrypoints
           - php
           - mailpit
           - mariadb

features/src/entrypoints/devcontainer-feature.json

@@ -0,0 +1,7 @@
+{
+    "id": "entrypoints",
+    "name": "Entrypoint Runner",
+    "description": "Runs entrypoint scripts for images without runit",
+    "version": "1.0.0",
+    "entrypoint": "/usr/local/bin/entrypoint-runner"
+}

features/src/entrypoints/entrypoint-runner

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+PATH=/bin:/sbin:/usr/bin:/usr/sbin
+
+if [ -x /usr/local/bin/runit-wrapper ] || [ -x /lib/runit/runit-init ] || [ ! -d /var/lib/entrypoint.d ]; then
+    exit 0
+fi
+
+exec run-parts /var/lib/entrypoint.d

features/src/entrypoints/install.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+PATH=/bin:/sbin:/usr/bin:/usr/sbin
+
+if [ "$(id -u || true)" -ne 0 ]; then
+    echo 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+    exit 1
+fi
+
+install -D -d -m 0755 -o root -g root /var/lib/entrypoint.d
+install -m 0755 -o root -g root entrypoint-runner /usr/local/bin/entrypoint-runner

features/test/entrypoints/test.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# shellcheck source=/dev/null
+source dev-container-features-test-lib
+
+check "/var/lib/entrypoint.d exists" test -d /var/lib/entrypoint.d
+check "/usr/local/bin/entrypoint-runner exists and is executable" test -x /usr/local/bin/entrypoint-runner