Merge pull request #19 from vst/18-distribute-statically-compiled-executable

Script for Static Compilation

Author: vst

build-static.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+
+## NOTE: Things would be much easier if we could use Nix, but we can
+## not (or I find it rather tedious). So, we have to use Docker.
+##
+## Also, `cabal install` does not work with
+## `--enable-executable-static` flag. So, we have to use `cabal build`
+## instead. Finally, `cabal build` does not work with
+## `--enable-executable-stripping`, hence the `strip` command usage.
+
+## GHC version:
+GHC_VERSION="9.4.8"
+
+## Docker image:
+DOCKER_IMAGE="quay.io/benz0li/ghc-musl:${GHC_VERSION}"
+
+## Executable name:
+EXECUTABLE_NAME="opsops"
+
+## Final executable name:
+FINAL_EXECUTABLE_NAME="${EXECUTABLE_NAME}-static-$(uname --kernel-name | tr '[:upper:]' '[:lower:]')-$(uname --machine)"
+
+## Final executable path:
+FINAL_EXECUTABLE_PATH="/tmp/${FINAL_EXECUTABLE_NAME}"
+
+## Docker container name:
+CONTAINER_NAME="static-builder-for-${EXECUTABLE_NAME}"
+
+## Create/update .cabal file:
+hpack
+
+## Cleanup first:
+cabal clean
+cabal v1-clean
+
+## First, pin all packages as per Nix:
+cabal freeze
+
+## Run the Docker container:
+docker run -i --detach -v "$(pwd):/app" --name "${CONTAINER_NAME}" "${DOCKER_IMAGE}" /bin/bash
+
+## Whitelist codebase directory for Git queries:
+docker exec "${CONTAINER_NAME}" git config --global --add safe.directory /app
+
+## Update cabal database:
+docker exec "${CONTAINER_NAME}" cabal update
+
+## Build the static binary:
+docker exec -w "/app" "${CONTAINER_NAME}" cabal build --enable-executable-static
+
+## Get the path to the executable:
+BUILD_PATH="$(docker exec -w "/app" "${CONTAINER_NAME}" cabal list-bin "${EXECUTABLE_NAME}")"
+
+## Strip debugging symbols:
+docker exec "${CONTAINER_NAME}" strip "${BUILD_PATH}"
+
+## Copy the binary to the host:
+docker cp "${CONTAINER_NAME}:${BUILD_PATH}" "${FINAL_EXECUTABLE_PATH}"
+
+## Compress the executable:
+upx "${FINAL_EXECUTABLE_PATH}"
+
+## Cleanup:
+docker exec -w "/app" "${CONTAINER_NAME}" cabal clean
+docker exec -w "/app" "${CONTAINER_NAME}" cabal v1-clean
+docker rm -f "${CONTAINER_NAME}"
+rm cabal.project.freeze
+file "${FINAL_EXECUTABLE_PATH}"