Generalize deploy scripts to work w/ both production and staging

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

script/deploy-migration

@@ -1,11 +1,42 @@
 #!/bin/bash
 
-set -e
+# Prerequisites:
+#
+# - Log in to the DigitalOcean docker registry
+#   doctl registry login
+#
+# - Target the `zed-1` kubernetes cluster
+#   doctl kubernetes cluster kubeconfig save zed-1
 
-IMAGE_ID=registry.digitalocean.com/zed/zed-migrator
+set -eu
+
+if [[ $# < 1 ]]; then
+  echo "Usage: $0 [production|staging|...]"
+  exit 1
+fi
+
+export ZED_KUBE_NAMESPACE=$1
+ENV_FILE="server/k8s/environments/${ZED_KUBE_NAMESPACE}.sh"
+if [[ ! -f $ENV_FILE ]]; then
+  echo "Invalid environment name '${ZED_KUBE_NAMESPACE}'"
+  exit 1
+fi
+
+if [[ -n $(git status --short) ]]; then
+  echo "Cannot deploy with uncommited changes"
+  exit 1
+fi
+
+git_sha=$(git rev-parse HEAD)
+export ZED_IMAGE_ID=registry.digitalocean.com/zed/zed-migrator:${ZED_KUBE_NAMESPACE}-${git_sha}
+export ZED_MIGRATE_JOB_NAME=zed-migrate-${git_sha}
 
 docker build . \
   --file ./Dockerfile.migrator \
-  --tag $IMAGE_ID
-docker push $IMAGE_ID
-kubectl apply -f ./server/migrate.yml
+  --tag $ZED_IMAGE_ID
+docker push $ZED_IMAGE_ID
+
+envsubst < server/k8s/migrate.template.yml | kubectl apply -f -
+
+pod=$(kubectl --namespace=${ZED_KUBE_NAMESPACE} get pods --selector=job-name=${ZED_MIGRATE_JOB_NAME} --output=jsonpath='{.items[*].metadata.name}')
+echo "pod:" $pod