Reduce image size (#35)

Dockerfile

@@ -1,20 +1,29 @@
-FROM alpine:3.18.4
+FROM alpine:3.18.4 as entry
+RUN apk add --no-cache npm && npm install -g [email protected] @types/[email protected]
+COPY entry.ts .
+RUN tsc \
+    --noUnusedLocals \
+    --noUnusedParameters \
+    --strict \
+    --typeRoots /usr/local/lib/node_modules/@types \
+    entry.ts \
+  && chmod +x entry.js
 
+FROM alpine:3.18.4
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1
 ENV PIP_NO_CACHE_DIR=1
-
-# Dependencies
+# Install all dependencies. As the last step of this RUN, we delete unused files
+# found by running `apk add ncdu && ncdu` inside `make shell`
 RUN apk add --no-cache --virtual .build-deps \
     gcc \
     musl-dev \
     npm \
+    py3-pip \
     python3-dev \
   && apk add --no-cache \
-    clang-extra-tools \
     libxslt \
     nodejs \
     openjdk17-jre-headless \
-    py3-pip \
     python3 \
   && pip3 install \
     autoflake==1.7.8 \
@@ -28,11 +37,11 @@ RUN apk add --no-cache --virtual .build-deps \
   && chmod +x /usr/bin/black21 \
   && npm install -g \
     @prettier/[email protected] \
-    @types/[email protected] \
     [email protected] \
     [email protected] \
-    [email protected] \
   && apk del .build-deps \
+  && wget https://github.com/muttleyxd/clang-tools-static-binaries/releases/download/master-f7f02c1d/clang-format-17_linux-amd64 -O clang-format \
+  && chmod +x clang-format \
   && wget https://github.com/google/google-java-format/releases/download/v1.18.1/google-java-format-1.18.1-all-deps.jar -O google-java-format \
   && wget https://search.maven.org/remotecontent?filepath=com/facebook/ktfmt/0.46/ktfmt-0.46-jar-with-dependencies.jar -O ktfmt \
   && wget https://github.com/mvdan/sh/releases/download/v3.7.0/shfmt_v3.7.0_linux_amd64 -O shfmt \
@@ -49,19 +58,17 @@ RUN apk add --no-cache --virtual .build-deps \
     -r sonatype:snapshots --main org.scalafmt.cli.Cli \
     --standalone \
     -o scalafmt \
-  && rm /bin/coursier
-
+  && touch /emptyfile \
+  && rm -rf \
+    /bin/coursier \
+    /black21-venv/lib/python3.11/site-packages/pip \
+    /black21-venv/lib/python3.11/site-packages/pkg_resources \
+    /black21-venv/lib/python3.11/site-packages/setuptools \
+    /root/.cache \
+    /root/.npm \
+    /usr/bin/lto-dump \
+    /var/cache
 # https://stackoverflow.com/a/59485924
 COPY --from=golang:1.22.3-alpine3.18 /usr/local/go/bin/gofmt /gofmt
-
-# Local files
 COPY . .
-RUN tsc \
-    --noUnusedLocals \
-    --noUnusedParameters \
-    --strict \
-    --typeRoots /usr/local/lib/node_modules/@types \
-    entry.ts \
-  && mv entry.js entry \
-  && chmod +x entry \
-  && touch /emptyfile
+COPY --from=entry /entry.js /entry

README.md

@@ -14,7 +14,7 @@ This repo currently contains a single [pre-commit](https://pre-commit.com/) hook
 - [shfmt](https://github.com/mvdan/sh) v3.7.0 for Shell
 - [xsltproc](http://www.xmlsoft.org/xslt/xsltproc.html) from libxslt v10138 for XML
 - [terraform fmt](https://github.com/hashicorp/terraform) v1.6.3 for Terraform
-- [ClangFormat](https://clang.llvm.org/docs/ClangFormat.html) v16.0.6 for Protobuf
+- [ClangFormat](https://clang.llvm.org/docs/ClangFormat.html) v17.0.4 for Protobuf
 - [SVGO](https://github.com/svg/svgo) v3.0.3 for SVG
 - [Taplo](https://taplo.tamasfe.dev/) v0.8.1 for TOML
 - Custom regex transformations (basically [sed](https://en.wikipedia.org/wiki/Sed)), for example:

entry.ts

@@ -176,7 +176,7 @@ const HOOKS: Record<HookName, LockableHook> = {
   [HookName.ClangFormat]: createLockableHook({
     action: sources =>
       run(
-        "clang-format",
+        "/clang-format",
         "-i", // Edit files in-place
         "--style=Google",
         ...sources,