From 139ba793053a2ac07383e05b5f9a8eddd14134ea Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Tue, 27 Jun 2023 09:36:28 -0700
Subject: Add cabal caching to linux-nix-cabal CI workflow.

---
 .github/workflows/ci.yml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 447b0f878..85ebfdfe0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -147,6 +147,20 @@ jobs:
     - uses: cachix/install-nix-action@v22
       with:
         nix_path: nixpkgs=channel:nixos-unstable
+    - name: Cache cabal global package db
+      id:   cabal-global
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.cabal
+        key: ${{ runner.os }}-nix-cabal-global-${{ secrets.CACHE_VERSION }}
+    - name: Cache cabal work
+      id:   cabal-local
+      uses: actions/cache@v3
+      with:
+        path: |
+          dist-newstyle
+        key: ${{ runner.os }}-nix-cabal-local-${{ secrets.CACHE_VERSION }}
     - run: |
         nix-shell --run "cabal update && cabal test --disable-optimization"
 
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