Add targets to build amd64 release binaries for windows, darwin and linux (#28)

* Add targets to build amd64 release binaries for windows, darwin and linux

* Allow specifying which tag to build

Author: pmalek-sumo

Makefile

@@ -157,6 +157,16 @@ clean:
 	rm -f telegraf.exe
 	rm -rf build
 
+# In order to specify which tag to build provide GIT_TAG environment variables with desired revision
+.PHONY: build-release-binaries-in-docker
+build-release-binaries-in-docker:
+	@./scripts/build-release-binaries-in-docker.sh
+
+# In order to specify which tag to build provide GIT_TAG environment variables with desired revision
+.PHONY: build-release-binaries-locally
+build-release-binaries-locally:
+	@./scripts/build-release-binaries.sh
+
 .PHONY: docker-image
 docker-image:
 	docker build -f scripts/stretch.docker -t "telegraf:$(commit)" .

scripts/build-release-binaries-docker-entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -e
+
+apt-get update && apt-get install --yes zip
+GIT_TAG="${GIT_TAG}" ./scripts/build-release-binaries.sh

scripts/build-release-binaries-in-docker.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+docker run \
+    --rm \
+    --volume "$(pwd)":/app \
+    --workdir /app \
+    --env GIT_TAG \
+    --entrypoint /app/scripts/build-release-binaries-docker-entrypoint.sh \
+    golang:1.15

scripts/build-release-binaries.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+set -e
+
+if [[ -z "${GIT_TAG}" ]]; then
+    echo "Please provide GIT_TAG environment variable to point which version to build"
+    exit 1
+fi
+
+DIR="$(pwd)"
+TMP_PATH="$(mktemp -d)/telegraf"
+REPO_URL="https://github.com/SumoLogic/telegraf.git"
+
+FLAGS="--quiet"
+if [[ -n "${CI}" ]] ; then
+    FLAGS=""
+fi
+
+mkdir "${TMP_PATH}"
+
+function cleanup() {
+    rm -rf "${TMP_PATH}"
+}
+trap cleanup EXIT
+
+echo "Cloning ${REPO_URL} to ${TMP_PATH}..."
+git clone ${FLAGS} --depth 1 ${REPO_URL} "${TMP_PATH}" && cd "${TMP_PATH}"
+git fetch ${FLAGS} --tags
+git checkout ${FLAGS} "${GIT_TAG}"
+echo "Checked out telegraf at ${GIT_TAG}"
+
+go mod download
+for OS in windows darwin linux; do
+    echo "Building telegraf for ${OS}..."
+    BINARY_PATH="telegraf-${GIT_TAG}_${OS}_amd64"
+    if [[ "${OS}" == "windows" ]] ; then
+        BINARY_PATH="${BINARY_PATH}.exe"
+    fi
+
+    GOOS=${OS} GOARCH=amd64 go build -o "${BINARY_PATH}" ./cmd/telegraf
+
+    if [[ "${OS}" == "windows" ]] ; then
+        ARCHIVE_PATH="$(basename "${BINARY_PATH}.zip")"
+        zip -q "${ARCHIVE_PATH}" "${BINARY_PATH}"
+    else
+        ARCHIVE_PATH="$(basename "${BINARY_PATH}.tar.gz")"
+        tar -czvf "${ARCHIVE_PATH}" "$(basename "${BINARY_PATH}")"
+    fi
+
+    if [[ -f "${DIR}/${ARCHIVE_PATH}" ]]; then
+        rm "${DIR}/${ARCHIVE_PATH}"
+    fi
+    cp "${ARCHIVE_PATH}" "${DIR}"
+
+    if [[ -f "${DIR}/${BINARY_PATH}" ]];then
+        rm "${DIR}/${BINARY_PATH}"
+    fi
+    cp "${BINARY_PATH}" "${DIR}"
+
+    echo "Successfully built ${BINARY_PATH} (compressed into ${ARCHIVE_PATH})"
+done