Try to fake optional task input

concourse/pipeline.yml

@@ -563,6 +563,8 @@ jobs:
       trigger: true
       passed:
       - build-boot-java-atom-package
+    - task: no-fatjar
+      file: sts4/concourse/tasks/no-fatjar.yml
   - task: build-atom-package
     params:
       package_name: atom-boot-java

concourse/tasks/build-atom-package.sh

@@ -6,7 +6,7 @@ output=$workdir/out
 #atom_commons=$workdir/sts4/atom-extensions/atom-commons
 atom_package=$workdir/sts4/atom-extensions/$package_name
 
-if [ -e $fatjar ]; then
+if [ -e $fatjar/version ]; then
     url=`cat fatjar/url`
     fatjar_version=`cat fatjar/version`
 fi
@@ -20,7 +20,7 @@ cd $atom_package
 
 timestamp=`date -u +%Y%m%d%H%M`
 
-if [ -e $fatjar ]; then
+if [ -e $fatjar/version ]; then
 cat > properties.json << EOF
 {
     "jarUrl": "${url}"
@@ -56,7 +56,7 @@ git config user.name "Alex Boyko"
 
 git add .
 
-if [ -e $fatjar ]; then
+if [ -e $fatjar/version ]; then
     git commit \
         -m "Publish $fatjar_version"
 else

concourse/tasks/build-atom-package.yml

@@ -2,7 +2,6 @@ inputs:
 - name: sts4
 - name: release_repo
 - name: fatjar
-  optional: true
 params:
   package_name: atom-bosh
 outputs:

concourse/tasks/no-fatjar.yml

@@ -0,0 +1,10 @@
+platform: linux
+image_resource:
+  type: docker-image
+  source:
+    repository: kdvolder/sts4-build-env
+outputs:
+- name: fatjar
+run:
+  path: echo
+  args: [ "Faking it there is no fatjar" ]