Static Linux builds with Alpine

Author: snoyberg

.azure/azure-linux-template.yml

@@ -10,26 +10,35 @@ jobs:
       GHC 8.4:
         BUILD: stack
         STACK_YAML: stack-ghc-84.yaml
+        EXTRA_SUFFIX: ""
       GHC 8.6:
         BUILD: stack
         STACK_YAML: stack-ghc-86.yaml
+        EXTRA_SUFFIX: ""
       GHC 8.8:
         BUILD: stack
         STACK_YAML: stack-ghc-88.yaml
+        EXTRA_SUFFIX: ""
+      Alpine:
+        BUILD: stack
+        STACK_YAML: stack-alpine.yaml
+        EXTRA_SUFFIX: "alpine"
       style:
         BUILD: style
+        EXTRA_SUFFIX: ""
       pedantic:
         BUILD: pedantic
         STACK_YAML: stack.yaml
+        EXTRA_SUFFIX: ""
   steps:
   - script: |
       export STACK_ROOT="$(Build.SourcesDirectory)"/.stack-root;
       mkdir -p ~/.local/bin
       curl -f -L "https://github.com/fpco/cache-s3/releases/download/${CACHE_S3_VERSION}/cache-s3-${CACHE_S3_VERSION}-${OS_NAME}-x86_64.tar.gz" -o ~/.local/bin/cache-s3.tar.gz
       tar xzf ~/.local/bin/cache-s3.tar.gz -C ~/.local/bin
       export PATH=$HOME/.local/bin:$PATH;
-      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}" restore stack --base-branch="${BASE_BRANCH}"
-      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}" restore stack work --base-branch="${BASE_BRANCH}"
+      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}${EXTRA_SUFFIX}" restore stack --base-branch="${BASE_BRANCH}"
+      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}${EXTRA_SUFFIX}" restore stack work --base-branch="${BASE_BRANCH}"
       etc/scripts/ci-setup.sh
       case "$BUILD" in
         style)
@@ -38,7 +47,7 @@ jobs:
           ;;
         *)
           export PATH=$HOME/.local/bin:$PATH
-          stack --install-ghc $ARGS test --bench --only-dependencies
+          stack $ARGS test --bench --only-dependencies
           ;;
       esac
       GHC_OPTIONS="-Werror"
@@ -51,7 +60,11 @@ jobs:
           hlint test/ --cpp-simple
           ;;
         stack)
-          stack test --haddock --no-haddock-deps --ghc-options="$GHC_OPTIONS"
+          stack test --haddock --no-haddock-deps --ghc-options="$GHC_OPTIONS" --copy-bins --local-bin-path bin
+
+          # Make sure Alpine actually builds a static exe that works on Ubuntu
+          ./bin/stack --version
+          ldd ./bin/stack || true # ldd returns exit code 1 on statics, which we don't want to fail for
           ;;
         pedantic)
           stack --system-ghc build --pedantic
@@ -94,9 +107,9 @@ jobs:
       export AWS_SECRET_ACCESS_KEY="$(AWS_SECRET_ACCESS_KEY)";
       export STACK_ROOT="$(Build.SourcesDirectory)"/.stack-root;
       if [ "$(Build.SourceBranchName)" = "${BASE_BRANCH}" ]; then
-        cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}" save stack;
+        cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}${EXTRA_SUFFIX}" save stack;
       fi;
-      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}" save stack work
+      cache-s3 --prefix="${CACHE_S3_PREFIX}" --git-branch="$(Build.SourceBranchName)" --suffix="${OS_NAME}${EXTRA_SUFFIX}" save stack work
     condition: and(succeeded(), in(variables['Build.Reason'], 'IndividualCI', 'BatchedCI'))
     env:
       OS_NAME: ${{ parameters.os }}

.azure/azure-nightly-template-linux.yml

@@ -25,6 +25,7 @@ jobs:
       OS_NAME: ${{ parameters.os }}
       AWS_ACCESS_KEY_ID: $(AWS_ACCESS_KEY_ID)
       AWS_SECRET_ACCESS_KEY: $(AWS_SECRET_ACCESS_KEY)
+      STACK_YAML: $(Build.SourcesDirectory)/stack-alpine.yaml
     displayName: 'Installation ${{parameters.os}}'
   - script: |
       set -ex

stack-alpine.yaml

@@ -0,0 +1,30 @@
+resolver: lts-14.27
+
+packages:
+- .
+
+docker:
+  enable: true
+  #repo: fpco/alpine-haskell-stack:8.6.5
+  repo: fpco/alpine-haskell-stack@sha256:665495cf78a9a7a667a45061a1322989b128d3443d87821fac1445dc85984804
+
+flags:
+  stack:
+    hide-dependency-versions: true
+    supported-build: true
+
+ghc-options:
+   "$locals": -fhide-source-paths -optl-static
+
+extra-deps:
+- Cabal-3.0.0.0@rev:0
+- hpack-0.33.0@rev:0
+- http-download-0.2.0.0@rev:0
+- filelock-0.1.1.4@rev:0
+- pantry-0.4.0.1@rev:0
+- casa-client-0.0.1@rev:0
+- casa-types-0.0.1@rev:0
+
+drop-packages:
+# See https://github.com/commercialhaskell/stack/pull/4712
+- cabal-install