Only call terminus -n build:env:delete:ci and terminus -n build:env:d…

…elete:pr when the current build will make a new multidev (#43)

* working on cleanup logic

* deletion checker

* updating multidev deletion logic

* fixing indenting

* fixing error

* removing testing files

* Delete contains-check.sh

src/@orb.yml

@@ -127,9 +127,35 @@ jobs:
           paths:
             - $PANTHEON_REPO_DIR
 
+      # terminus build:env:delete can take around a minute.
+      # So only run it when the current build needs to
+      # make a new Multidev environment.
       - run:
-          name: Delete old Multidevs to make space for a potential new one
-          command: terminus -n build:env:delete:ci "$TERMINUS_SITE" --keep=2 --yes
+          name: Delete old Multidevs if this build needs to create a new one
+          command: |
+            if [[ $TERMINUS_ENV = ci-* || $TERMINUS_ENV = pr-*   ]]
+            then
+                echo "May need to delete old ci- or pr- environments to make room for this one"
+                echo "Getting list of all environments"
+                export ENV_LIST=$(terminus env:list $TERMINUS_SITE --field=id)
+                echo "Checking if current environment is in list of existing environments"
+                if [[ $(echo "${ENV_LIST}" | grep -x ${TERMINUS_ENV})  ]]
+                then
+                    echo "${TERMINUS_ENV} found in the list of environments"
+                    exit 0
+                else
+                    echo "${TERMINUS_ENV} not found in the list of environments."
+                    echo "Running clean-up script to delete old pr- environments"
+                    terminus -n build:env:delete:pr "$TERMINUS_SITE" --yes
+                    if [[ $TERMINUS_ENV = ci-*  ]]
+                    then
+                        echo "Running clean-up script to delete old ci- environments"
+                        terminus -n build:env:delete:ci "$TERMINUS_SITE" --keep=2 --yes
+                    else
+                        echo "Skipping deletion of ci- envs"
+                    fi
+                fi
+            fi
 
       - run:
           name: Copy code to the local clone of the Pantheon repository
@@ -162,7 +188,6 @@ jobs:
             # Delete old multidev environments associated with a PR that has been
             # merged or closed.
             terminus -n build:env:delete:pr "$TERMINUS_SITE" --yes
-
       # @todo, Check back with CircleCI DevRel team. They mentioned possibly
       # adding a CircleCI-maintained Orb step to do this concept.
       - run: