portable: CI: use GH and Cirrus

Try and implement CI across systems for better performance.

Curently, a WIP.

Author: ThomasAdam

.github/ci/before-install.sh

@@ -1,8 +1,33 @@
 #!/bin/sh
 
-if [ "$CIRRUS_OS" = "linux" ]; then
-	apt-get update -qq && \
-	apt-get --no-install-suggests --no-install-recommends -y install \
+set -xv
+SUDO="sudo"
+export SUDO
+
+which_ci() {
+	if [ -n "$RUNNER_OS" ]; then
+		# GitHub Actions
+		case "$RUNNER_OS" in
+		Linux)
+			unset SUDO
+			echo "linux" ;;
+		esac
+	elif [ -n "$CIRRUS_OS" ]; then
+		# Cirrus CI
+		echo "$CIRRUS_OS"
+	fi
+}
+
+OS="$(which_ci)"
+
+echo "CI_OS=$CI_OS"
+
+if [ "$OS" = "linux" ]; then
+	if [ "$CI_OS" == "alpine" ]; then
+		apk add libevent-dev git build-base bsd-compat-headers bison automake make autoconf libbsd-dev util-linux-dev libressl-dev zlib-dev ncurses-dev openssh ed gcc clang
+	else 
+	"$SUDO" apt-get update -qq && \
+	"$SUDO" apt-get --no-install-suggests --no-install-recommends -y install \
 		athena-jot \
 		autoconf \
 		autoconf-archive \
@@ -11,6 +36,7 @@ if [ "$CIRRUS_OS" = "linux" ]; then
 		bison \
 		build-essential \
 		ed \
+		clang \
 		git \
 		libbsd-dev \
 		libevent-dev \
@@ -22,9 +48,10 @@ if [ "$CIRRUS_OS" = "linux" ]; then
 		pkg-config \
 		uuid-dev \
 		zlib1g-dev
+	fi
 fi
 
-if [ "$CIRRUS_OS" = "freebsd" ]; then
+if [ "$OS" = "freebsd" ]; then
 	pkg install -y \
 		automake \
 		pkgconf \
@@ -35,7 +62,7 @@ if [ "$CIRRUS_OS" = "freebsd" ]; then
 		p5-HTTP-Daemon-SSL
 fi
 
-if [ "$CIRRUS_OS" = "darwin" ]; then
+if [ "$OS" = "darwin" ]; then
 	brew install autoconf \
 		automake \
 		bison \

.github/ci/build.sh

@@ -2,4 +2,4 @@
 
 ./autogen.sh || exit 1
 ./configure || exit 1
-exec make
+exec make -j4

.github/workflows/ci.yml

@@ -0,0 +1,86 @@
+name: GoT-portable CI
+
+on:
+  push:
+    branches:
+      - portable
+      - ta/cirrus-updates
+
+jobs:
+  ubuntu-build:
+    name: Ubuntu (${{ matrix.compiler }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        compiler: [gcc, clang]
+    env:
+      CI_OS: linux
+      CI_COMPILER: ${{ matrix.compiler }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - run: git config --global --add safe.directory "${GITHUB_WORKSPACE}"
+      - name: Configure and Install Packages
+        run: |
+          .github/ci/before-install.sh
+      - name: Build
+        run: .github/ci/build.sh
+      - name: Tests
+        run: |
+          sudo make install
+          (umask 022; make tests GOT_TEST_QUIET=)
+
+  alpine-build:
+    name: Alpine (${{ matrix.compiler }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        compiler: [gcc, clang]
+    env:
+      CI_OS: alpine
+      CI_COMPILER: ${{ matrix.compiler }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - run: git config --global --add safe.directory "${GITHUB_WORKSPACE}"
+      - name: Setup latest Alpine Linux
+        uses: jirutka/setup-alpine@v1
+      - name: Configure and Install Packages
+        run: |
+          .github/ci/before-install.sh
+        shell: alpine.sh --root {0}
+      - name: Setup SSH (for tests)
+        run: |
+          set -xv
+          echo "HOST *" > /etc/ssh/ssh_config
+          echo "StrictHostKeyChecking no" >> /etc/ssh/ssh_config
+          mkdir -p /var/run/sshd
+          ssh-keygen -A
+          ssh-keygen -t ed25519 -N '' -f "$GITHUB_WORKSPACE/ci_ssh_key"
+          install -d -m 700 ~/.ssh
+          cat "$GITHUB_WORKSPACE/ci_ssh_key.pub" >> /etc/ssh/authorized_keys
+          chmod 600 /etc/ssh/authorized_keys
+          printf '%s\n' \
+            "AuthorizedKeysFile /etc/ssh/authorized_keys" \
+            "PasswordAuthentication no" \
+            "ChallengeResponseAuthentication no" \
+            "PermitRootLogin yes" >> /etc/ssh/sshd_config
+          touch /etc/ssh/ssh_known_hosts
+          chmod 600 /etc/ssh/ssh_known_hosts
+          /usr/sbin/sshd -D &
+        shell: alpine.sh --root {0}
+      - name: Run Tests
+        shell: alpine.sh {0}
+        run: |
+          set -eux
+          echo $(whoami)
+          ssh -i "$GITHUB_WORKSPACE/ci_ssh_key" \
+          -T \
+          localhost "echo OK: $(uname -a)"
+      - name: Build
+        run: .github/ci/build.sh
+        shell: alpine.sh {0}
+      - name: Install
+        run: |
+          make install
+        shell: alpine.sh --root {0}