Tiltfile: fix templating cluster name

I'm not even sure how this could work previously, as envsubst works only
with environment variables, not with shell variables.

Perhaps cd4342a broke it by moving
CLUSTER_NAME from Tilt-based substitutions to envsubst.

In any case, exporting CLUSTER_NAME makes envsubst properly populate
resource names, which fixes the problem.

Signed-off-by: Mateusz Gozdek <[email protected]>

Author: invidian

Tiltfile

@@ -349,7 +349,7 @@ def deploy_worker_templates(template, substitutions):
 
     yaml = shlex.quote(yaml)
     flavor_name = os.path.basename(flavor)
-    flavor_cmd = "RANDOM=$(bash -c 'echo $RANDOM'); CLUSTER_NAME=" + flavor.replace("windows", "win") + "-$RANDOM; make generate-flavors; echo " + yaml + "> ./.tiltbuild/" + flavor + "; cat ./.tiltbuild/" + flavor + " | " + envsubst_cmd + " | " + kubectl_cmd + " apply -f - && echo \"Cluster \'$CLUSTER_NAME\' created, don't forget to delete\""
+    flavor_cmd = "RANDOM=$(bash -c 'echo $RANDOM'); export CLUSTER_NAME=" + flavor.replace("windows", "win") + "-$RANDOM; make generate-flavors; echo " + yaml + "> ./.tiltbuild/" + flavor + "; cat ./.tiltbuild/" + flavor + " | " + envsubst_cmd + " | " + kubectl_cmd + " apply -f - && echo \"Cluster \'$CLUSTER_NAME\' created, don't forget to delete\""
 
     # wait for kubeconfig to be available
     flavor_cmd += "; until " + kubectl_cmd + " get secret ${CLUSTER_NAME}-kubeconfig > /dev/null 2>&1; do sleep 5; done; " + kubectl_cmd + " get secret ${CLUSTER_NAME}-kubeconfig -o jsonpath={.data.value} | base64 --decode > ./${CLUSTER_NAME}.kubeconfig; chmod 600 ./${CLUSTER_NAME}.kubeconfig; until " + kubectl_cmd + " --kubeconfig=./${CLUSTER_NAME}.kubeconfig get nodes > /dev/null 2>&1; do sleep 5; done"