Compile the controller with a version set from git describe

.buildkite/steps/controller.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -euxo pipefail
+
+set -Eeufo pipefail
 
 apt update && apt install -y --no-install-recommends jq
 
@@ -12,8 +13,8 @@ latest=$(curl -L -s https://api.github.com/repos/ko-build/ko/releases/latest | j
 curl -sSfL "https://github.com/ko-build/ko/releases/download/${latest}/ko_${latest:1}_${OS^}_${ARCH}.tar.gz" | tar -xzv -C /bin ko
 
 tag=$(git describe)
-ko login ghcr.io -u $REGISTRY_USERNAME --password $REGISTRY_PASSWORD
+ko login ghcr.io -u "$REGISTRY_USERNAME" --password "$REGISTRY_PASSWORD"
 export KO_DOCKER_REPO=ghcr.io/buildkite/agent-stack-k8s/controller
-controller_image=$(ko build --bare --tags "$tag" --platform linux/amd64,linux/arm64)
+controller_image=$(VERSION="$tag" ko build --bare --tags "$tag" --platform linux/amd64,linux/arm64)
 
-buildkite-agent meta-data set "controller-image" "${controller_image}"
+buildkite-agent meta-data set controller-image "${controller_image}"

.ko.yaml

@@ -0,0 +1,14 @@
+defaultPlatforms:
+- linux/amd64
+- linux/arm64
+builds:
+- id: agent-k8s-stack
+  dir: .
+  main: .
+  env:
+  - CGO_ENABLED=0
+  ldflags:
+  - -s
+  - -w
+  - -extldflags "-static"
+  - -X github.com/buildkite/agent-stack-k8s/v2/internal/version.version={{.Env.VERSION}}

justfile

@@ -48,7 +48,11 @@ agent target os=("linux") arch=("amd64 arm64"):
   rm packaging/docker/alpine/buildkite-agent-*
 
 controller *FLAGS:
-  ko build -P {{FLAGS}}
+  #!/usr/bin/env bash
+  set -eufo pipefail
+
+  export VERSION=$(git describe)
+  ko build --preserve-import-paths {{FLAGS}}
 
 deploy *FLAGS:
   #!/usr/bin/env bash