CI/CD: Create initial version of CI/CD workflow.

The CI/CD workflow will only execute on Ubuntu and MacOS latest version.
The workflow will attempt to build with autotools and CMake and execute
the tests. The workflow will run for all pull requests and pushes done
to the master branch.

.github/workflows/ci.yml

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+#############################################################################
+#
+# Author: Jia Tan
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+#############################################################################
+
+name: CI
+
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows running workflow manually
+  workflow_dispatch:
+
+jobs:
+  # When CMake can support disabling check types and
+  # encoders/decoders/threads, it will be combined to one Linux job
+  # and another matrix list.
+  Linux-Autotools:
+    # Just run on latest ubuntu
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        check_types: ["crc32", "crc32,crc64", "crc32,sha256", "crc32,crc64,sha256"]
+        disable: [encoders, decoders, bcj, delta, threads]
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      - name: Install Dependencies
+        run: sudo apt-get install -y autoconf automake build-essential po4a autopoint
+      - name: Build
+        run: ./build-aux/ci_build.sh -b autotools -c ${{ matrix.check_types }} -d ${{ matrix.disable }}
+
+  Linux-CMake:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Dependencies
+        run: sudo apt-get install -y build-essential cmake
+      - name: Build
+        run: ./build-aux/ci_build.sh -b cmake
+
+  MacOS-Autotools:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        check_types: ["crc32", "crc32,crc64", "crc32,sha256", "crc32,crc64,sha256"]
+        disable: [encoders, decoders, bcj, delta, threads]
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      - name: Install Dependencies
+        run: brew install autoconf automake libtool po4a
+      - name: Build
+        run: ./build-aux/ci_build.sh -b autotools -c ${{ matrix.check_types }} -d ${{ matrix.disable }}
+
+  MacOS-CMake:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Dependencies
+        run: brew install cmake
+      - name: Build
+        run: ./build-aux/ci_build.sh -b cmake
+    

build-aux/ci_build.sh

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+#!/bin/sh
+#
+#############################################################################
+#
+# Script meant to be used for Continuous Integration automation for POSIX
+# systems. On GitHub, this is used by Ubuntu and MacOS builds.
+#
+#############################################################################
+#
+# Author: Jia Tan
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+#############################################################################
+
+set -e
+
+USAGE="Usage: $0 -b [autotools|cmake] -c [crc32|crc64|sha256] -d [encoders,decoders,bcj,delta,threads] -l [destdir] -s [srcdir]"
+
+# Absolute path of script directory
+ABS_DIR=$(cd -- "$(dirname -- "$0")" && pwd)
+
+# Default CLI option values
+BUILD_SYSTEM="autotools"
+CHECK_TYPE="crc32,crc64,sha256"
+BCJ="y"
+DELTA="y"
+ENCODERS="y"
+DECODERS="y"
+THREADS="y"
+SRC_DIR="$ABS_DIR/../"
+DEST_DIR="$SRC_DIR/../xz_build"
+
+# Parse arguments
+while getopts b:c:d:l:s: opt; do
+	# b option can have either value "autotools" OR "cmake"
+	case ${opt} in
+	b)
+		case "$OPTARG" in
+			autotools) ;;
+			cmake) ;;
+			*) echo "Invalid build system: $OPTARG"; exit 1;;
+		esac
+		BUILD_SYSTEM="$OPTARG"
+	;;
+	# c options can be a comma separated list of check types to support
+	c)
+	for crc in $(echo $OPTARG | sed "s/,/ /g"); do 
+		case "$crc" in
+		crc32) ;;
+		crc64) ;;
+		sha256) ;;
+		*) echo "Invalid check type: $crc"; exit 1 ;;
+		esac
+	done
+	CHECK_TYPE="$OPTARG"
+	;;
+	# d options can be a comma separated list of things to disable at
+	# configure time
+	d)
+	for disable_arg in $(echo $OPTARG | sed "s/,/ /g"); do 
+		case "$disable_arg" in
+		encoders) ENCODERS="n" ;;
+		decoders) DECODERS="n" ;;
+		bcj) BCJ="n" ;;
+		delta) DELTA="n" ;;
+		threads) THREADS="n" ;;
+		*) echo "Invalid disable value: $disable_arg"; exit 1 ;;
+		esac
+	done	
+	;;
+	l) DEST_DIR="$OPTARG"
+	;;
+	s) SRC_DIR="$OPTARG"
+	;;
+	esac
+done
+
+# Build based on arguments
+mkdir -p "$DEST_DIR"
+case $BUILD_SYSTEM in
+	autotools)
+	# Run autogen.sh script
+	cd "$SRC_DIR"
+	"./autogen.sh"
+	cd "$DEST_DIR"
+	# Generate configure option values
+
+	EXTRA_OPTIONS=""
+	FILTER_LIST="lzma1,lzma2"
+
+	if [ "$BCJ" = "y" ]
+	then
+		FILTER_LIST="$FILTER_LIST,x86,powerpc,ia64,arm,armthumb,arm64,sparc"
+	fi
+
+	if [ "$DELTA" = "y" ]
+	then
+		FILTER_LIST="$FILTER_LIST,delta"
+	fi
+
+	if [ "$ENCODERS" = "y" ]
+	then
+		EXTRA_OPTIONS="$EXTRA_OPTIONS --enable-encoders=$FILTER_LIST"
+	else
+		EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-encoders"
+	fi
+
+	if [ "$DECODERS" = "y" ]
+	then
+		EXTRA_OPTIONS="$EXTRA_OPTIONS --enable-decoders=$FILTER_LIST"
+	else
+		EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-decoders"
+	fi
+
+	if [ "$THREADS" = "n" ]
+	then
+		EXTRA_OPTIONS="$EXTRA_OPTIONS --disable-threads"
+	fi
+
+	# Run configure script
+	"$SRC_DIR"/configure --enable-checks=$CHECK_TYPE $EXTRA_OPTIONS
+
+	# Build the project
+	make
+
+	# Run the tests
+	make check
+	;;
+
+	cmake)
+	# CMake currently does not support disabling encoders, decoders,
+	# threading, or check types. For now, just run the full build.
+	cd "$DEST_DIR"
+	cmake "$SRC_DIR/CMakeLists.txt" -B "$DEST_DIR"
+	make
+	make test
+	;;
+
+esac