Update Dockerfile to use v3.0.0 image (#147)

* Update Dockerfile to use v2.0.0 image

* Update Dockerfile to use v3.0.0 of hylo-dev-toolchain

* Use MinSizeRel LLVM as fallback and supply environment variable at the correct place in CI

Author: tothambrus11

.devcontainer/Dockerfile

@@ -1,2 +1,4 @@
 ARG HYLO_LLVM_BUILD_TYPE=MinSizeRel
-FROM ghcr.io/hylo-lang/hylo-dev-toolchain:pr-15-1805f10
+
+# Resolves empty string to MinSizeRel.
+FROM ghcr.io/hylo-lang/hylo-dev-toolchain:v3.0.0-${HYLO_LLVM_BUILD_TYPE:-MinSizeRel}

.devcontainer/devcontainer.json

@@ -3,7 +3,7 @@
     "build": {
         "dockerfile": "Dockerfile",
         "args": {
-            "HYLO_LLVM_BUILD_TYPE": "${localEnv:HYLO_LLVM_BUILD_TYPE:Debug}"
+            "HYLO_LLVM_BUILD_TYPE": "${localEnv:HYLO_LLVM_BUILD_TYPE:MinSizeRel}"
         }
     },
     "features": {

.github/workflows/test.yml

@@ -53,6 +53,9 @@ jobs:
             HYLO_LLVM_BUILD_TYPE: MinSizeRel
 
     runs-on: ubuntu-24.04
+    env:
+      HYLO_LLVM_BUILD_TYPE: ${{ matrix.HYLO_LLVM_BUILD_TYPE }}
+
     steps:
     - uses: actions/checkout@v4
       with:
@@ -68,8 +71,6 @@ jobs:
     - name: Build and run via CMake
       uses: devcontainers/ci@v0.3
       if: ${{ matrix.build-system == 'cmake' }}
-      env:
-        HYLO_LLVM_BUILD_TYPE: ${{ matrix.HYLO_LLVM_BUILD_TYPE }}
       with:
         runCmd: >
           set -exu # fail fast, print commands before executing, treat unset variables as an error