From a89c2fbab9bcf7d769e9d27262ab29f93342f114 Mon Sep 17 00:00:00 2001
From: Ben Gamari <ben@smart-cactus.org>
Date: Wed, 2 Sep 2020 14:47:34 -0400
Subject: ci.sh: Enforce minimum happy/alex versions

Also, always invoke cabal-install to ensure that happy/alex symlinks are
up-to-date.
---
 .gitlab/ci.sh | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/.gitlab/ci.sh b/.gitlab/ci.sh
index 938cc22da9..dfc3d9e6e4 100755
--- a/.gitlab/ci.sh
+++ b/.gitlab/ci.sh
@@ -7,6 +7,8 @@ set -e -o pipefail
 
 # Configuration:
 hackage_index_state="2020-09-14T19:30:43Z"
+MIN_HAPPY_VERSION="1.20"
+MIN_ALEX_VERSION="3.2"
 
 # Colors
 BLACK="0;30"
@@ -294,17 +296,13 @@ function setup_toolchain() {
     *) ;;
   esac
 
-  if [ ! -e "$HAPPY" ]; then
-      info "Building happy..."
-      cabal update
-      $cabal_install happy
-  fi
+  cabal update
 
-  if [ ! -e "$ALEX" ]; then
-      info "Building alex..."
-      cabal update
-      $cabal_install alex
-  fi
+  info "Building happy..."
+  $cabal_install happy --constraint="happy>=$MIN_HAPPY_VERSION"
+
+  info "Building alex..."
+  $cabal_install alex --constraint="alex>=$MIN_ALEX_VERSION"
 }
 
 function cleanup_submodules() {
-- 
cgit v1.2.1