From 327b80cf5677d84097177300aaa847c455157326 Mon Sep 17 00:00:00 2001
From: Julian Ospald <hasufell@posteo.de>
Date: Thu, 15 Jul 2021 22:39:37 +0200
Subject: [PATCH] Add cross compilation to CI test

---
 .gitlab-ci.yml                              | 23 +++++++++
 .gitlab/before_script/linux/install_deps.sh | 13 ++++--
 .gitlab/script/ghcup_cross.sh               | 52 +++++++++++++++++++++
 3 files changed, 85 insertions(+), 3 deletions(-)
 create mode 100755 .gitlab/script/ghcup_cross.sh

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fc59375..dd9f92f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,6 +21,7 @@ variables:
     OS: "LINUX"
     ARCH: "64"
     CABAL_DIR: "$CI_PROJECT_DIR/cabal"
+    CROSS: ""
 
 .alpine:64bit:
   image: "alpine:3.12"
@@ -268,6 +269,24 @@ test:linux:latest:
     CABAL_VERSION: "3.4.0.0"
   needs: []
 
+test:linux:cross-armv7:
+  stage: test
+  extends:
+    - .test_ghcup_version
+    - .debian
+  variables:
+    GHC_VERSION: "8.10.4"
+    GHC_TARGET_VERSION: "8.10.5"
+    CABAL_VERSION: "3.4.0.0"
+    CROSS: "arm-linux-gnueabihf"
+  needs: []
+  when: manual
+  before_script:
+    - ./.gitlab/before_script/linux/install_deps.sh
+  script:
+    - ./.gitlab/script/ghcup_cross.sh
+
+
 ######## linux 32bit test ########
 
 test:linux:recommended:32bit:
@@ -286,6 +305,7 @@ test:linux:recommended:armv7:
   variables:
     GHC_VERSION: "8.10.4"
     CABAL_VERSION: "3.4.0.0"
+    CROSS: ""
   when: manual
   needs: []
 
@@ -295,6 +315,7 @@ test:linux:recommended:aarch64:
   variables:
     GHC_VERSION: "8.10.4"
     CABAL_VERSION: "3.4.0.0"
+    CROSS: ""
   when: manual
   needs: []
 
@@ -394,6 +415,7 @@ release:linux:armv7:
     ARTIFACT: "armv7-linux-ghcup"
     GHC_VERSION: "8.10.4"
     CABAL_VERSION: "3.4.0.0"
+    CROSS: ""
 
 release:linux:aarch64:
   stage: release
@@ -407,6 +429,7 @@ release:linux:aarch64:
     ARTIFACT: "aarch64-linux-ghcup"
     GHC_VERSION: "8.10.4"
     CABAL_VERSION: "3.4.0.0"
+    CROSS: ""
 
 ######## darwin release ########
 
diff --git a/.gitlab/before_script/linux/install_deps.sh b/.gitlab/before_script/linux/install_deps.sh
index 062b1a5..31fe99c 100755
--- a/.gitlab/before_script/linux/install_deps.sh
+++ b/.gitlab/before_script/linux/install_deps.sh
@@ -9,6 +9,13 @@ mkdir -p "${TMPDIR}"
 sudo apt-get update -y
 sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https
 
+if [ "${CROSS}" = "arm-linux-gnueabihf" ] ; then
+	sudo apt-get install -y autoconf build-essential gcc-arm-linux-gnueabihf
+	sudo dpkg --add-architecture armhf
+	sudo apt-get update -y
+	sudo apt-get install -y libncurses-dev:armhf
+fi
+
 case "${ARCH}" in
 	ARM*)
 		case "${ARCH}" in
@@ -57,9 +64,9 @@ case "${ARCH}" in
 		chmod +x ghcup-bin
 
 		./ghcup-bin upgrade -i -f
-		./ghcup-bin install ${GHC_VERSION}
-		./ghcup-bin set ${GHC_VERSION}
-		./ghcup-bin install-cabal ${CABAL_VERSION}
+		./ghcup-bin install ghc ${GHC_VERSION}
+		./ghcup-bin set ghc ${GHC_VERSION}
+		./ghcup-bin install cabal ${CABAL_VERSION}
 
 		;;
 esac
diff --git a/.gitlab/script/ghcup_cross.sh b/.gitlab/script/ghcup_cross.sh
new file mode 100755
index 0000000..e76caac
--- /dev/null
+++ b/.gitlab/script/ghcup_cross.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup_env"
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+CI_PROJECT_DIR=$(pwd)
+
+ecabal() {
+	cabal "$@"
+}
+
+eghcup() {
+	ghcup -v -c -s file://$CI_PROJECT_DIR/ghcup-${JSON_VERSION}.yaml "$@"
+}
+
+git describe --always
+
+### build
+
+ecabal update
+
+ecabal build -w ghc-${GHC_VERSION}
+cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup')" "$CI_PROJECT_DIR"/.local/bin/ghcup
+
+### cleanup
+
+rm -rf "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
+
+### manual cli based testing
+
+eghcup --numeric-version
+
+eghcup install ghc ${GHC_VERSION}
+eghcup set ghc ${GHC_VERSION}
+eghcup install cabal ${CABAL_VERSION}
+
+cabal --version
+
+eghcup debug-info
+
+eghcup compile ghc -j $(nproc) -v ${GHC_TARGET_VERSION} -b ${GHC_VERSION} -x ${CROSS} -- --enable-unregisterised
+eghcup set ghc ${CROSS}-${GHC_TARGET_VERSION}
+
+[ `$(eghcup whereis ghc ${CROSS}-${GHC_TARGET_VERSION}) --numeric-version` = "${GHC_TARGET_VERSION}" ]
+
+# nuke
+eghcup nuke
+[ ! -e "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup" ]
+