gitlab-ci: Bump Docker images

We now generate our Docker images via Dhall definitions, as described in
ghc/ci-images!52. Additionally, we are far more careful about where tools
come from, using the ALEX, HAPPY, HSCOLOR, and GHC environment variables
(set in the Dockerfiles) to find bootstrapping tools.

1 files changed, 25 insertions, 17 deletions

diff --git a/.gitlab/ci.sh b/.gitlab/ci.sh
index 5a42709c24..4b37a00b83 100755
--- a/.gitlab/ci.sh
+++ b/.gitlab/ci.sh
@@ -152,22 +152,26 @@ function show_tool() {
 function set_toolchain_paths() {
   needs_toolchain=1
   case "$(uname)" in
-    Linux) needs_toolchain="" ;;
+    Linux) needs_toolchain="0" ;;
     *) ;;
   esac
 
-  if [[ -n "$needs_toolchain" ]]; then
+  if [[ "$needs_toolchain" = 1 ]]; then
       # These are populated by setup_toolchain
       GHC="$toolchain/bin/ghc$exe"
       CABAL="$toolchain/bin/cabal$exe"
       HAPPY="$toolchain/bin/happy$exe"
       ALEX="$toolchain/bin/alex$exe"
   else
-      GHC="$(which ghc)"
-      CABAL="/usr/local/bin/cabal"
-      HAPPY="$HOME/.cabal/bin/happy"
-      ALEX="$HOME/.cabal/bin/alex"
+      # These are generally set by the Docker image but
+      # we provide these handy fallbacks in case the
+      # script isn't run from within a GHC CI docker image.
+      if [ -z "$GHC" ]; then GHC="$(which ghc)"; fi
+      if [ -z "$CABAL" ]; then GHC="$(which cabal)"; fi
+      if [ -z "$HAPPY" ]; then GHC="$(which happy)"; fi
+      if [ -z "$ALEX" ]; then GHC="$(which alex)"; fi
   fi
+
   export GHC
   export CABAL
   export HAPPY
@@ -204,12 +208,12 @@ function setup() {
 }
 
 function fetch_ghc() {
-  local v="$GHC_VERSION"
-  if [[ -z "$v" ]]; then
-      fail "GHC_VERSION is not set"
-  fi
-
   if [ ! -e "$GHC" ]; then
+      local v="$GHC_VERSION"
+      if [[ -z "$v" ]]; then
+          fail "neither GHC nor GHC_VERSION are not set"
+      fi
+
       start_section "fetch GHC"
       url="https://downloads.haskell.org/~ghc/${GHC_VERSION}/ghc-${GHC_VERSION}-${boot_triple}.tar.xz"
       info "Fetching GHC binary distribution from $url..."
@@ -233,12 +237,12 @@ function fetch_ghc() {
 }
 
 function fetch_cabal() {
-  local v="$CABAL_INSTALL_VERSION"
-  if [[ -z "$v" ]]; then
-      fail "CABAL_INSTALL_VERSION is not set"
-  fi
-
   if [ ! -e "$CABAL" ]; then
+      local v="$CABAL_INSTALL_VERSION"
+      if [[ -z "$v" ]]; then
+          fail "neither CABAL nor CABAL_INSTALL_VERSION are not set"
+      fi
+
       start_section "fetch GHC"
       case "$(uname)" in
         # N.B. Windows uses zip whereas all others use .tar.xz
@@ -279,7 +283,11 @@ function fetch_cabal() {
 function setup_toolchain() {
   fetch_ghc
   fetch_cabal
-  cabal_install="$CABAL v2-install --index-state=$hackage_index_state --installdir=$toolchain/bin"
+
+  cabal_install="$CABAL v2-install \
+    --with-compiler=$GHC \
+    --index-state=$hackage_index_state --installdir=$toolchain/bin"
+
   # Avoid symlinks on Windows
   case "$(uname)" in
     MSYS_*|MINGW*) cabal_install="$cabal_install --install-method=copy" ;;