From dc4cce5c9b7e9b57ccf92151af520d2501822759 Mon Sep 17 00:00:00 2001
From: Vehbi Sinan Tunalioglu <vst@vsthost.com>
Date: Mon, 1 Apr 2024 23:34:22 +0800
Subject: [PATCH] feat: add script to build static and compressed binary for
 executable

---
 build-static.sh | 65 +++++++++++++++++++++++++++++++++++++++++++++++++
 default.nix     |  1 +
 2 files changed, 66 insertions(+)
 create mode 100644 build-static.sh

diff --git a/build-static.sh b/build-static.sh
new file mode 100644
index 0000000..92f8c6a
--- /dev/null
+++ b/build-static.sh
@@ -0,0 +1,65 @@
+#!/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:${GHC_VERSION}"
+
+## Executable name:
+EXECUTABLE_NAME="lhp"
+
+## Final executable name:
+FINAL_EXECUTABLE_NAME="${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}" "${DOCKER_IMAGE}" /bin/bash
+
+## Update cabal database:
+docker exec "${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}"
diff --git a/default.nix b/default.nix
index 3b3d531..264aabf 100644
--- a/default.nix
+++ b/default.nix
@@ -111,6 +111,7 @@ let
       pkgs.nil
       pkgs.nixpkgs-fmt
       pkgs.nodePackages.prettier
+      pkgs.upx
 
       ## Our custom scripts:
       dev-test-build