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content/posts/argocd-dynamic-environment-per-branch-part-1/index.md

@@ -316,9 +316,32 @@ First, let's set environment variables:
 
 So after setting all these variables, I can use `envsubst  < ./kube/template.yaml` to create a correct generator. After that I only need to append it to one that is already in k8s. *And not to append if it's already there*.
 
-So let's design out pipeline:
-
-1. Get an application set is currently deployed to k8s
-    ```BASH
-    kubectl get application-set 
+So my pipeline for a non-main branch looks like that: 
+```YAML
+- name: Deploy a preview ApplicationSet
+  image: alpine/k8s:1.24.10
+  when: 
+    branch:
+      exclude:
+        - main
+  environment:
+    KUBECONFIG_CONTENT:
+      from_secret: KUBECONFIG_CONTENT
+  commands: 
+    - mkdir $HOME/.kube
+    - echo $KUBECONFIG_CONTENT | base64 -d > $HOME/.kube/config
+    - apk update --no-cache && apk add yq gettext
+    - export ARGO_APP_CHART_VERSION=`cat chart/Chart.yaml | yq '.version'`
+    - export ARGO_APP_BRANCH=$DRONE_BRANCH
+    - export ARGO_APP_HOSTNAME="${DRONE_BRANCH}-dev.badhouseplants.net"
+    - export ARGO_APP_IMAGE_TAG=$DRONE_COMMIT_SHA
+    - kubectl get -f ./kube/applicationset.yaml -o yaml  > /tmp/old_appset.yaml
+    - yq "del(.spec.generators[].list.elements[] | select(.name == \"$ARGO_APP_BRANCH\"))" /tmp/old_appset.yaml > /tmp/clean_appset.yaml
+    - envsubst  < ./kube/template.yaml > /tmp/elements.yaml
+    - yq '.spec.generators[].list.elements += load("/tmp/elements.yaml")' /tmp/clean_appset.yaml > /tmp/new_appset.yaml
+    - kubectl apply -f /tmp/new_appset.yaml
 ```
+
+And even though it's very ugly, I already like it. Because it's working
+
+![Drone pipeline result](/dyn-envs/drone-pipeline.png)