Merge pull request #13 from gizmoguy/no-bash

Further reduce size of python3 docker image

Author: gizmoguy

.github/workflows/release.yml

@@ -9,6 +9,8 @@ jobs:
   docker-image:
     name: "Build docker image"
     runs-on: ubuntu-latest
+    environment:
+      name: "release"
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: Test workflow
+
+on: [push, pull_request]
+
+jobs:
+  docker-image:
+    name: "Build docker image"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up qemu
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      - name: Set up docker buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+      - name: Run buildx
+        run: |
+          docker buildx build \
+            --platform linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x \
+            --file Dockerfile \
+            .

Dockerfile

@@ -2,7 +2,7 @@
 
 FROM python:3.9-alpine3.15
 
-RUN apk add --no-cache bash su-exec && \
+RUN apk add --no-cache su-exec && \
     if [ ! -e /usr/bin/pip ]; then ln -s /usr/bin/pip3 /usr/bin/pip; fi && \
     if [ ! -e /usr/bin/python ]; then ln -s /usr/bin/python3 /usr/bin/python; fi
 

entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/ash
 
 # Add local user
 # Either use the LOCAL_USER_ID if passed in at runtime or
@@ -8,8 +8,12 @@ USER_ID=${LOCAL_USER_ID:-0}
 GROUP_ID=${LOCAL_GROUP_ID:-0}
 
 echo "Starting with UID=$USER_ID GID=$GROUP_ID"
-export HOME="/home/faucet"
-addgroup -g "${GROUP_ID}" faucet >/dev/null 2>&1 || true
-adduser -u "${USER_ID}" -G faucet -g "" -h "${HOME}" -D faucet >/dev/null 2>&1 || true
 
-exec /sbin/su-exec faucet "$@"
+if [ "${USER_ID}" -ne 0 ] && [ "${GROUP_ID}" -ne 0 ]; then
+    export HOME="/home/faucet"
+    addgroup -g "${GROUP_ID}" faucet >/dev/null 2>&1 || true
+    adduser -u "${USER_ID}" -G faucet -g "" -h "${HOME}" -D faucet >/dev/null 2>&1 || true
+    exec /sbin/su-exec faucet "$@"
+else
+    exec "$@"
+fi