Add ruby build script

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: Build
+on:
+  push:
+    branches: [ main ]
+  workflow_dispatch:
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Docker Setup Buildx
+      uses: docker/setup-buildx-action@v1
+    - name: Docker Login
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_PASSWORD }}
+    - name: Build and push to Docker Hub
+      id: hub_build
+      uses: docker/build-push-action@v2
+      with:
+        push: true
+        tags: compilerexplorer/ruby-builder:latest
+        cache-from: type=registry,ref=compilerexplorer/ruby-builder:latest
+        cache-to: type=inline
+    - name: Docker Hub Image Digest
+      run: echo ${{ steps.hub_build.outputs.digest }}

Dockerfile

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+FROM ubuntu:18.04
+MAINTAINER Matt Godbolt <[email protected]>
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt update -y -q && apt upgrade -y -q && apt update -y -q && \
+    apt -q install -y \
+    autoconf \
+    bison \
+    build-essential \
+    curl \
+    git \
+    libffi-dev \
+    libgdbm-dev \
+    libncurses5-dev \
+    libreadline6-dev \
+    libssl-dev \
+    libyaml-dev \
+    ruby \
+    unzip \
+    xz-utils \
+    zlib1g-dev \
+    && \
+    cd /tmp && \
+    curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && \
+    unzip awscliv2.zip && \
+    ./aws/install && \
+    rm -rf aws* \
+    && \
+    # Remove apt's lists to make the image smaller.
+    rm -rf /var/lib/apt/lists/*
+
+RUN mkdir -p /root
+COPY build /root/
+
+WORKDIR /root

build/build.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+set -ex
+
+ROOT=$PWD
+VERSION=$1
+
+URL=https://github.com/ruby/ruby.git
+
+case $VERSION in
+trunk)
+    VERSION=trunk-$(date +%Y%m%d)
+    BRANCH=master
+    ;;
+*)
+    TAG=v${VERSION//./_}
+    ;;
+esac
+
+# use tag name as branch if otherwise unspecified
+BRANCH=${BRANCH-$TAG}
+
+# some builds checkout a tag instead of a branch
+# these builds have a different prefix for ls-remote
+REF=refs/heads/${BRANCH}
+if [[ ! -z "${TAG}" ]]; then
+    REF=refs/tags/${TAG}
+fi
+
+# determine build revision
+REVISION=$(git ls-remote "${URL}" "${REF}" | cut -f 1)
+LAST_REVISION="${3}"
+
+echo "ce-build-revision:${REVISION}"
+
+if [[ "${REVISION}" == "${LAST_REVISION}" ]]; then
+  echo "ce-build-status:SKIPPED"
+  exit
+fi
+
+FULLNAME=ruby-${VERSION}
+OUTPUT=${ROOT}/${FULLNAME}.tar.xz
+S3OUTPUT=
+if [[ $2 =~ ^s3:// ]]; then
+    S3OUTPUT=$2
+else
+    if [[ -d "${2}" ]]; then
+        OUTPUT=$2/${FULLNAME}.tar.xz
+    else
+        OUTPUT=${2-$OUTPUT}
+    fi
+fi
+
+BUILD_DIR=${ROOT}/build
+STAGING_DIR=/opt/compiler-explorer/${FULLNAME}
+rm -rf "${STAGING_DIR}"
+mkdir -p "${STAGING_DIR}"
+mkdir -p "${BUILD_DIR}"
+
+# Setup ruby checkout
+git clone --depth 1 --single-branch -b "${BRANCH}" "${URL}" "${ROOT}/ruby"
+
+# Generate autoconf
+cd "${ROOT}/ruby"
+if [[ -f "./autogen.sh" ]]; then
+    ./autogen.sh
+else
+    # older ruby doesn't have autogen.sh
+    autoreconf --install
+fi
+
+# Configure build
+cd "${BUILD_DIR}"
+../ruby/configure \
+    --prefix="${STAGING_DIR}" \
+    --disable-install-doc
+
+# Build and install artifacts
+make -j $(nproc)
+make install
+
+# Don't try to compress the binaries as they don't like it
+
+export XZ_DEFAULTS="-T 0"
+tar Jcf ${OUTPUT} --transform "s,^./,./${FULLNAME}/," -C ${STAGING_DIR} .
+
+if [[ ! -z "${S3OUTPUT}" ]]; then
+    aws s3 cp --storage-class REDUCED_REDUNDANCY "${OUTPUT}" "${S3OUTPUT}"
+fi