Allow bosh deploy with custom release tarball

[#167721359](https://www.pivotaltracker.com/story/show/167721359)

Co-authored-by: Dave Walter <[email protected]>

bosh-deploy-with-created-release/task

@@ -31,7 +31,13 @@ main() {
   check_input_params
   optional_submodule_bump
   setup_bosh_env_vars
-  bosh_interpolate "${root_dir}" "$(grep final_name release/config/final.yml | awk '{print $2}')"
+
+  if [[ -r "${root_dir}/release_tarball_name/name" ]]; then
+    bosh_interpolate "${root_dir}" "$(grep final_name release/config/final.yml | awk '{print $2}')" "$(cat ${root_dir}/release_tarball_name/name)"
+  else
+    bosh_interpolate "${root_dir}" "$(grep final_name release/config/final.yml | awk '{print $2}')"
+  fi
+
   if [ "$REGENERATE_CREDENTIALS" == true ]; then
     remove_credentials_from_credhub
   fi

bosh-deploy-with-created-release/task.yml

@@ -13,8 +13,14 @@ inputs:
 - name: ops-files  # - Operations files to be made available
 - name: vars-files  # - Variable files to be made available
 - name: release
-# - BOSH release source repo
-# - A dev release will be created from this repo and used in the deployment
+# - BOSH release source repo or directory containing a release tarball
+# - If the input is a git repository, a dev release will be created from
+#   this repo and used in the deployment. If the input is a directory
+#   containing a pre-built release tarball, then the release_tarball_name
+#   input needs to point at a directory containing a "name" file containing
+#   the full name of the tarball to be used.
+- name: release_tarball_name
+  optional: true
 - name: cf-deployment-concourse-tasks  # - This repo
 
 run:

shared-functions

@@ -93,6 +93,9 @@ function bosh_interpolate() {
 
   local release_name
   release_name="${2}"
+
+  local release_tarball_name
+  release_tarball_name="${3}"
   set -u
 
   local bosh_manifest
@@ -112,7 +115,17 @@ function bosh_interpolate() {
   done
 
   if [ -n "${release_name}" ]; then
-    cat << EOF > create-provided-release.yml
+    if [ -n "${release_tarball_name}" ]; then
+      cat << EOF > create-provided-release.yml
+---
+- type: replace
+  path: /releases/name=${release_name}
+  value:
+    name: ${release_name}
+    url: file://${root_dir}/release/${release_tarball_name}
+EOF
+    else
+      cat << EOF > create-provided-release.yml
 ---
 - type: replace
   path: /releases/name=${release_name}
@@ -121,6 +134,8 @@ function bosh_interpolate() {
     version: create
     url: file://${root_dir}/release
 EOF
+    fi
+
     arguments="${arguments} -o create-provided-release.yml"
   fi