scripts: add a script for generating pre-compiled artifacts

.github/workflows/test.yaml

@@ -25,3 +25,17 @@ jobs:
       run: go build ./...
     - name: Test
       run: go test ./...
+  release:
+    strategy:
+      matrix:
+        go-version: [1.17.x]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Build Release
+      run: ./scripts/build-release.sh v0.0.0+test

.gitignore

@@ -0,0 +1 @@
+bin/

scripts/build-release.sh

@@ -0,0 +1,56 @@
+#!/bin/bash -e
+
+# A script for building binary releases for various platforms.
+
+if [[ "$0" != "./scripts/build-release.sh" ]]; then
+	1>&2 echo "Script must be run at root of filesystem"
+	exit 1
+fi
+
+VERSION="$1"
+
+if [[ "$VERSION" != v* ]]; then
+	1>&2 echo "No version specified as argument"
+	exit 1
+fi
+
+mkdir -p bin
+rm -f bin/*.zip
+rm -f bin/*.tar.gz
+
+function build {
+	TEMP_DIR="$( mktemp -d )"
+	GOOS="$1"
+	GOARCH="$2"
+
+	export CGO_ENABLED=0
+
+	BIN_NAME="log4jscanner"
+	if [[ "$1" == "windows" ]]; then
+	  BIN_NAME="log4jscanner.exe"
+	fi
+
+	GOOS="$GOOS" GOARCH="$GOARCH" go build -o "${TEMP_DIR}/log4jscanner/${BIN_NAME}"
+
+	if [[ "$1" == "windows" ]]; then
+		TARGET="${PWD}/bin/log4jscanner-${VERSION}-${GOOS}-${GOARCH}.zip"
+		cd "$TEMP_DIR"
+		zip -r "$TARGET" ./
+		cd -
+	else
+		tar \
+			--group=root \
+			--owner=root \
+			-czvf \
+			"${PWD}/bin/log4jscanner-${VERSION}-${GOOS}-${GOARCH}.tar.gz" \
+			-C "$TEMP_DIR" \
+			"./"
+	fi
+	rm -rf "$TEMP_DIR"
+}
+
+build darwin amd64
+build darwin arm64
+build linux amd64
+build linux arm64
+build windows amd64