[Concourse] does not handle ytt syntax well

[ramonskie]

as i incorporate more and more of ytt syntaxing in to my concourse pipelines.
i noticed that that if you have for example

groups:
- name: debian
  jobs:
    - update-apt-index-html
#@ for package in data.values.packages:
    - #@ package.name
#@ end

that the plugin will give the following error

ctivating 'vscode-concourse' extension
"spring-boot.ls.java.home" setting not specified or empty value
"java.home" setting not specified or empty value
No user specified java-home setting. Looking for JAVA_HOME env variable...
JAVA_HOME environment variable not set
Looking for the path to JVM inside PATH env variable
Found java executable: /usr/lib/jvm/java-21-openjdk/bin/java
isJavaEightOrHigher => true
Redirecting server logs to /dev/null
Disabling server log output. No more output will be sent after this.
[Error - 1:15:14 PM] Request textDocument/documentSymbol failed.
Error: name must not be falsy
    at vf.validate (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22554)
    at new vf (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22843)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:604:22)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:609:31)
    at convertBatch (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:193:25)
    at Object.map (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:202:17)
    at Object.asDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:601:22)
    at _provideDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/documentSymbol.js:83:76)
    at uP.provideDocumentSymbols (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:140:127693)
[Error - 1:15:14 PM] Request textDocument/documentSymbol failed.
Error: name must not be falsy
    at vf.validate (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22554)
    at new vf (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22843)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:604:22)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:609:31)
    at convertBatch (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:193:25)
    at Object.map (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:202:17)
    at Object.asDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:601:22)
    at _provideDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/documentSymbol.js:83:76)
    at uP.provideDocumentSymbols (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:140:127693)
[Error - 1:18:45 PM] Request textDocument/documentSymbol failed.
Error: name must not be falsy
    at vf.validate (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22554)
    at new vf (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:22843)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:604:22)
    at asDocumentSymbol (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:609:31)
    at convertBatch (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:193:25)
    at Object.map (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/utils/async.js:202:17)
    at Object.asDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/protocolConverter.js:601:22)
    at _provideDocumentSymbols (/home/ramonskie/.vscode/extensions/vmware.vscode-concourse-1.56.0/node_modules/vscode-languageclient/lib/common/documentSymbol.js:83:76)
    at uP.provideDocumentSymbols (file:///usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:140:127693)

it would be nice if the concourse vscode plugin wouldso handle some small ytt synatx

[martinlippert]

@BoykoAlex Would be great if you could have a look.