New solution that works on the free tier

Let's just require some languages to be built and published locally.
Easy enough.

.circleci/config.yml

@@ -13,7 +13,6 @@ jobs:
   build_and_deploy:
     machine:
       image: ubuntu-2004:202010-01
-    resource_class: large
     steps:
       - checkout
       - run: tools/ci-bootstrap.bash

langs/ante.yaml

@@ -28,6 +28,9 @@ install:
     cp target/release/ante "${pkg}/usr/local/bin/"
     cp -R stdlib "${pkg}/opt/ante/"
     popd
+  # Disallow this from running in CI because compiling LLVM takes 5+
+  # hours on the standard CircleCI runner.
+  disallowCI: true
 
 setup: |
   mkdir -p "$HOME/.config/ante"

tools/ci-run.bash

@@ -5,4 +5,4 @@ set -euo pipefail
 echo "${DOCKER_PASSWORD}" | sudo -E docker login --username "${DOCKER_USERNAME}" --password-stdin
 
 make system
-make publish Z=1
+make publish Z=1 CI=1

tools/generate-build-script.js

@@ -263,6 +263,13 @@ EOF`);
 latest_release() {
     curl -sSL "https://api.github.com/repos/\$1/releases/latest" | jq -r .tag_name
 }`);
+  }
+  if (install && install.disallowCI) {
+    parts.unshift(`\
+if [[ -n "\${CI:-}" ]]; then
+    echo "language ${id} cannot be built in CI" >&2
+    exit 1
+fi`);
   }
   parts.unshift(`\
 #!/usr/bin/env bash