From c7c731d404592f04ba72c148d6f94a7717fe84f8 Mon Sep 17 00:00:00 2001
From: pacien
Date: Mon, 28 Jun 2021 20:20:16 +0200
Subject: ci: configure cache for haskell stack

---
 .github/workflows/build.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aef142b..d877ffc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,13 +30,19 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.stack
+          key: compiler-${{ runner.os }}-${{ hashFiles('compiler/stack.yaml') }}
       - uses: haskell/actions/setup@v1
         with:
           ghc-version: 8.10.4
           enable-stack: true
       - name: Build Haskell Stack project
         working-directory: compiler
+        shell: bash
         run: |
+          STACK_ROOT=~/.stack  # make it the same on all platforms
           stack setup --no-terminal
           stack build --no-terminal
           stack install --local-bin-path dist
-- 
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