From c941569cdcbdb57968b999d3dc0a211821b06a34 Mon Sep 17 00:00:00 2001
From: Tim Hutt <timothy.hutt@codasip.com>
Date: Thu, 8 Aug 2024 10:28:21 +0100
Subject: [PATCH] Install Sail from binary in CI

This should be a lot faster. It also means the version is pinned properly which wasn't the case before.

I also recommended users to do the same in the README do they don't have to deal with OPAM.
---
 .github/workflows/compile.yml | 12 ++++++------
 README.md                     |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/compile.yml b/.github/workflows/compile.yml
index 865c748a5..129d80c34 100644
--- a/.github/workflows/compile.yml
+++ b/.github/workflows/compile.yml
@@ -7,19 +7,19 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Install packages
-      run: sudo apt install -y opam zlib1g-dev pkg-config libgmp-dev z3 device-tree-compiler
+      run: sudo apt install -y --no-install-recommends ocaml zlib1g-dev pkg-config libgmp-dev device-tree-compiler curl
     - name: Check out repository code
       uses: actions/checkout@HEAD
       with:
         submodules: true
     - name: Ensure pre-commit checks pass
       run: pip install pre-commit && pre-commit run --all-files --show-diff-on-failure --color=always
-    - name: Init opam
-      run: opam init --disable-sandboxing -y
-    - name: Install sail
-      run: opam install -y sail
+    - name: Install sail from binary
+      run: |
+        sudo mkdir -p /usr/local
+        curl --location https://github.com/rems-project/sail/releases/download/0.18-linux-binary/sail.tar.gz | sudo tar xvz --directory=/usr/local --strip-components=1
     - name: Build and test simulators
-      run: eval $(opam env) && test/run_tests.sh
+      run: test/run_tests.sh
     - name: Upload test results
       if: always()
       uses: actions/upload-artifact@v4
diff --git a/README.md b/README.md
index 25057078d..11ee98575 100644
--- a/README.md
+++ b/README.md
@@ -275,7 +275,7 @@ Getting started
 
 ### Building the model
 
-Install [Sail](https://github.com/rems-project/sail/) [using opam](https://github.com/rems-project/sail/blob/sail2/INSTALL.md) then:
+Install [Sail](https://github.com/rems-project/sail/). On Linux you can download a [binary release](https://github.com/rems-project/sail/releases) (strongly recommended), or you can install from source [using opam](https://github.com/rems-project/sail/blob/sail2/INSTALL.md). Then:
 
 ```
 $ make