replace texplate with ytt

as texplate is archived and has not been updated since 2018. and currently has some golang lib issues.
darccio/mergo#240

ci/dockerfiles/deployment/Dockerfile

@@ -78,12 +78,17 @@ RUN curl -s https://api.github.com/repos/cloudfoundry/credhub-cli/releases/lates
   mv credhub-* /usr/local/bin/credhub && \
   chmod +x /usr/local/bin/credhub
 
-RUN go install github.com/pivotal-cf/texplate@latest
-
 # Install yq
 RUN wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq && \
     chmod +x /usr/bin/yq
 
+# Install ytt
+RUN curl -s https://api.github.com/repos/carvel-dev/ytt/releases/latest | \
+  jq -r '.assets[] | .browser_download_url | select(contains("linux-amd64"))' | \
+  xargs wget && \
+  mv ytt-* /usr/local/bin/ytt && \
+  chmod +x /usr/local/bin/ytt
+
 RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && \
     unzip awscliv2.zip && ./aws/install
 

ci/tasks/create-bosh-deployment-source-file/source-template.yml

@@ -1,7 +1,8 @@
 ---
-target: {{ env "TARGET" }}
-client: {{ env "CLIENT" }}
-client_secret: {{ env "CLIENT_SECRET" }}
-ca_cert: {{ toJson (env "CA_CERT") }}
-jumpbox_url: {{ env "JUMPBOX_URL" }}:22
-jumpbox_ssh_key: {{ toJson (env "JUMPBOX_SSH_KEY") }}
+#@ load("@ytt:data", "data")
+target: #@ data.values.TARGET
+client: #@ data.values.CLIENT
+client_secret: #@ data.values.CLIENT_SECRET
+ca_cert: #@ data.values.CA_CERT
+jumpbox_url: #@ data.values.JUMPBOX_URL + ":22"
+jumpbox_ssh_key: #@ data.values.JUMPBOX_SSH_KEY

ci/tasks/create-bosh-deployment-source-file/task

@@ -7,15 +7,15 @@ function main() {
   source_file="${ROOT}/source-file/bosh-source.json"
 
   pushd "${ROOT}/bbl-states/${BBL_STATE_DIR}" > /dev/null
-    export TARGET="$(bbl director-address)"
-    export CLIENT="$(bbl director-username)"
-    export CLIENT_SECRET="$(bbl director-password)"
-    export CA_CERT="$(bbl director-ca-cert)"
-    export JUMPBOX_URL="$(bbl jumpbox-address)"
-    export JUMPBOX_SSH_KEY="$(bbl ssh-key)"
+    export YTT_TARGET="$(bbl director-address)"
+    export YTT_CLIENT="$(bbl director-username)"
+    export YTT_CLIENT_SECRET="$(bbl director-password)"
+    export YTT_CA_CERT="$(bbl director-ca-cert)"
+    export YTT_JUMPBOX_URL="$(bbl jumpbox-address)"
+    export YTT_JUMPBOX_SSH_KEY="$(bbl ssh-key)"
   popd > /dev/null
 
-  texplate execute "${ROOT}/bbl-ci/ci/tasks/create-bosh-deployment-source-file/source-template.yml" -o json > "${source_file}"
+  ytt -f "${ROOT}/bbl-ci/ci/tasks/create-bosh-deployment-source-file/source-template.yml" --data-values-env YTT > "${source_file}"
 }
 
 main

dockerfiles/cf-deployment-concourse-tasks-bbl-dev/Dockerfile

@@ -1,5 +1,5 @@
 FROM cloudfoundry/cf-deployment-concourse-tasks
-MAINTAINER https://github.com/cloudfoundry/bosh-bootloader
+LABEL maintainer="https://github.com/cloudfoundry/bosh-bootloader"
 
 # Create directory for GOPATH
 RUN mkdir -p /go/bin
@@ -26,8 +26,12 @@ RUN echo "deb https://packages.cloud.google.com/apt cloud-sdk main" | tee -a /et
   apt-get update && \
   apt-get -qqy install google-cloud-cli
 
-# needed in the task 'create-bosh-source-file'
-RUN go install github.com/pivotal-cf/texplate@latest
+# Install ytt
+RUN curl -s https://api.github.com/repos/carvel-dev/ytt/releases/latest | \
+  jq -r '.assets[] | .browser_download_url | select(contains("linux-amd64"))' | \
+  xargs wget && \
+  mv ytt-* /usr/local/bin/ytt && \
+  chmod +x /usr/local/bin/ytt
 
 # add bbl from latest commit
 ADD bbl /usr/local/bin/