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A Language Server for YANG

Home Page: http://www.yang-central.org

License: Apache License 2.0

Xtend 86.86% Lex 2.40% Java 10.74%

language-server yang

yang-lsp's Introduction

yang-lsp

A language server for YANG (see Language Server Protocol).

Usage

The language server application is available in two distributions:

yang-language-server_<version>.zip (plain language server)
yang-language-server_diagram-extension_<version>.zip (language server with diagram extension for sprotty)

Both variants include start scripts to launch the background process. Connect its input/output streams to your host application in order to communicate with the language server.

The YANG Language Server is currently being used in

YANGSTER based on Theia (incl. diagram extension)
Yang VS Code available on the VS Marketplace
Yang Eclipse

Build

  git clone https://github.com/TypeFox/yang-lsp.git
  cd yang-lsp/yang-lsp
  ./gradlew build

Release Engineering

The yang-lsp is the base of multiple binaries

Repository	Client	Binary	Bin Repo	CI	Trigger
yang-lsp	LSP	JAR + script	GH Action Artifacts	GH Action	GH Commit / PR
yangster	Theia Browser	Docker image	Docker Hub	Docker Hub	GitHub hook / Jenkins pipeline
	Theia	Theia extension	npm	Jenkins	`yarn run publish`
yangster-electron	Theia Electron	executables	?	?	?
yang-eclipse	Eclipse	p2 update site	Eclipse Marketplace	Jenkins	GitHub hook / Jenkins pipeline
yang-vscode	VSCode	VSCode extension	VSCode Marketplace	-	`vsce`

yang-lsp's People

Contributors

Stargazers

Watchers

Forkers

kittaakos huyuwen amirsaad2015 rimshao dalavancloud denisvasilik drkstr101 msgpo eastwellext isabella232 debovema lsp-implementaions esmasth

yang-lsp's Issues

Color scheme

I hate the color scheme. I like black on white. Is it configurable?

Basic workspace and editor features

Basic workspace and editor features are missed:

Copy-paste
Import-export of files
Tab handling (close all, close all to the right etc)
Name of tab too long to fit does not show as tooltip
Git integration

[diagram] support rpc, action, notification

Implement additional statement/sub-statement validation rules

from the spec.

A plug-in system shall allow third parties to contribute validation rules.
It shall be possible to add, remove and update plug-ins at runtime, by changing the yang-lsp setting file or the plug-in artifact.

[TypeDef] Linking and Validation

This ticket is about linking and validation of Deroived Types :
https://tools.ietf.org/html/rfc7950#section-4.2.5
https://tools.ietf.org/html/rfc7950#section-7.3

and especially https://tools.ietf.org/html/rfc7950#section-9
The various restrictions depending on the type need to be validated.

[validation] Validate Augment contents

The contents of an augment statement must be checked.
E.g. If I augment a leaf, I cannot add another leaf.

[diagram] module imports - arrow points into wrong direction

Add validation constraint that checks the `config` value of a schema node

All key leafs in a list must have the same value for their "config" as the list itself.
If "config" is not specified, the default is the same as the parent schema node's "config" value.
If the parent node is a case node, the value is the same as the case node's parent choice node.
If the top node does not specify a "config" statement, the default is "true".
If a node has "config" set to "false", no node underneath it can have "config" set to "true".

Spec: https://tools.ietf.org/html/rfc7950#section-7.21.1

Implement parser for special values

Many statements in yang have a value that actually is an expression. We need to implement parser rules for them. I already tunes the lexer to go into a different mode on certain statements, now the emitted tokens need to consumed to build expression trees.

In the spec I saw the following value variants:

strings (just a quoted/unquoted string) - > nothing to do here
identifiers (elements with a name)
identifier-ref (prefix?:ID)
range (e.g. 1 .. 23)
date (e.g. 2017-06-07)
length
schema node identifier (subset of xpath)
instance node identifier (subset of xpath)
xpath

ABNF definitions of some of the rules can be found at the end of the spec (https://tools.ietf.org/html/rfc7950#section-14)
An xpath grammar can be found here (https://github.com/antlr/grammars-v4/blob/master/xpath/xpath.g4) (spec is here https://www.w3.org/TR/1999/REC-xpath-19991116/)

Formatter

We need to implement a formatter for yang.

NPE in scope context provider

Possibly related to #33.

YANG:

module moduleName {
  // yang-version 1.1;
  
 //yan
  
 
  namespace "urn:someUri";
  prefix "foo";



description "bar";

organization "org";

grouping foo {
        list feuillage {
            description "Local feuillage docstring";
            uses bar {
                refine blatt {
                    default "beech";
                }
            }
            uses baz {
                refine "leaves" {
                    default cz;
                }
                refine "leaves/cz/lupen" {
                    min-elements 0;
                }
                refine "leaves/dustbin/dustbin/hoja" {
                    description "Refined description of hoja";
                }
            }
            key "feuille";
        }
        anyxml rubbish;
    }
  
}

Exception:


java.lang.NullPointerException
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$15(ScopeContextProvider.java:514)
	at io.typefox.yang.scoping.Linker.link(Linker.java:36)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$14(ScopeContextProvider.java:521)
	at io.typefox.yang.scoping.ScopeContext.lambda$12(ScopeContext.java:426)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at io.typefox.yang.scoping.ScopeContext.resolveAll(ScopeContext.java:428)
	at io.typefox.yang.resource.YangResource.getEObject(YangResource.java:39)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:222)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:189)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:148)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:134)
	at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.lambda$launch$6(IncrementalBuilder.java:236)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.lambda$executeClustered$1(ClusteringStorageAwareResourceLoader.java:77)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Lists$TransformingRandomAccessList$1.transform(Lists.java:640)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.addAll(ArrayList.java:577)
	at com.google.common.collect.Iterables.addAll(Iterables.java:350)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.executeClustered(ClusteringStorageAwareResourceLoader.java:80)
	at org.eclipse.xtext.build.BuildContext.executeClustered(BuildContext.java:55)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.launch(IncrementalBuilder.java:251)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:399)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:384)
	at org.eclipse.xtext.ide.server.ProjectManager.doBuild(ProjectManager.java:115)
	at org.eclipse.xtext.ide.server.ProjectManager.doInitialBuild(ProjectManager.java:107)
	at org.eclipse.xtext.ide.server.BuildManager.doInitialBuild(BuildManager.java:149)
	at org.eclipse.xtext.ide.server.WorkspaceManager.refreshWorkspaceConfig(WorkspaceManager.java:148)
	at org.eclipse.xtext.ide.server.WorkspaceManager.initialize(WorkspaceManager.java:117)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$initialize$7(LanguageServerImpl.java:247)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockWrite(RequestManager.java:80)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.initialize(LanguageServerImpl.java:250)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:105)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:203)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:139)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Jul 20, 2017 11:54:35 AM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint lambda$static$0
SEVERE: Internal error: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:53)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:105)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:203)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:139)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	... 11 more
Caused by: org.eclipse.emf.common.util.WrappedException: java.lang.NullPointerException
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:230)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:189)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:148)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:134)
	at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.lambda$launch$6(IncrementalBuilder.java:236)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.lambda$executeClustered$1(ClusteringStorageAwareResourceLoader.java:77)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Lists$TransformingRandomAccessList$1.transform(Lists.java:640)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.addAll(ArrayList.java:577)
	at com.google.common.collect.Iterables.addAll(Iterables.java:350)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.executeClustered(ClusteringStorageAwareResourceLoader.java:80)
	at org.eclipse.xtext.build.BuildContext.executeClustered(BuildContext.java:55)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.launch(IncrementalBuilder.java:251)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:399)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:384)
	at org.eclipse.xtext.ide.server.ProjectManager.doBuild(ProjectManager.java:115)
	at org.eclipse.xtext.ide.server.ProjectManager.doInitialBuild(ProjectManager.java:107)
	at org.eclipse.xtext.ide.server.BuildManager.doInitialBuild(BuildManager.java:149)
	at org.eclipse.xtext.ide.server.WorkspaceManager.refreshWorkspaceConfig(WorkspaceManager.java:148)
	at org.eclipse.xtext.ide.server.WorkspaceManager.initialize(WorkspaceManager.java:117)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$initialize$7(LanguageServerImpl.java:247)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockWrite(RequestManager.java:80)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.initialize(LanguageServerImpl.java:250)
	... 16 more
Caused by: java.lang.NullPointerException
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$15(ScopeContextProvider.java:514)
	at io.typefox.yang.scoping.Linker.link(Linker.java:36)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$14(ScopeContextProvider.java:521)
	at io.typefox.yang.scoping.ScopeContext.lambda$12(ScopeContext.java:426)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at io.typefox.yang.scoping.ScopeContext.resolveAll(ScopeContext.java:428)
	at io.typefox.yang.resource.YangResource.getEObject(YangResource.java:39)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:222)
	... 42 more

Align validation issue codes and messages with pyang

Reference: https://github.com/mbj4668/pyang/blob/f7529de23e695f5689d3ed65bb2024edcfc97ec2/pyang/error.py#L41

Outline view missing

Are you planning to include an outline view for the Yang module?

Eclipse plugin

The current set of projects do not have an eclipse plugin included, because I did not want to go with the wizard's maven recommendation.

We should add an eclipse plug-in and create a build similar to the one we have for Xtext. I.e. the core bits are built with gradle and the eclipse plugin is built with Tycho consuming the gradle artifacts.

Substatement definition

I decided to make the parser relaxed about the the statement's substatements, order, arity of them, to allow to provide better messages and not to break the parsing process because of a violation.

In the spec there is a list of substatements for each statement. First one would be module (https://tools.ietf.org/html/rfc7950#section-7.1.1).

We need to

put those definitions in code
use them in validation
use them in content assist

Running latest docker image fails

docker@default:~$ docker run typefox/yangster yangster
container_linux.go:262: starting container process caused "exec: "yangster": executable file not found in $PATH"
docker: Error response from daemon: oci runtime error: container_linux.go:262: starting container process caused "exec: "yangster": executable file not found in $PATH".

Xpath linking

The xpath expressions need to be linked

Formatter revision

Continuation of #19.

Check indentation. #49
Align indentation configuration. #45
Do not use serializer in formatter test, cf. #49.
Throw formatter exceptions.
Handle HIDDEN regions, e.g. ", '
Fix formatting of XpathExpression, Expression, and SchemaNodeIdentifier
Create LSP integration test.

CI Build

We should have a public CI build

[completion] Add documentation

The proposals should show documentation

Add quickfixes

[validation] substatement error position

The substatement validation, should be placed under the keyword, not under the argument.

Yang diagrams cannot be moved

A diagram cannot be moved / scrolled, only zoomed. Is this a browser issue and its support for svg?

NPE in scoping when opening up a file while the workspace is being built right after LS startup

YANG:

module example-3-b {

  yang-version "1.1";

  namespace "http://example.com/example-3/b";

  prefix "ex3b";

  import example-3-b {
    prefix "oin";
    revision-date 2010-09-24;
  }

  import example-3-a {
    prefix "ex3a";
  }

  revision 2016-08-22;

  identity idY;

  identity idZ {
    base ex3a:idX;
    base idY;
  }

  augment "/ex3a:top" {
    if-feature "ex3a:fea1 or ex3a:fea2";
    uses ex3a:gbar;
    leaf baz {
      type oin:port-number;
    }
  }
}

Exception:

70024 [pool-1-thread-1] ERROR xt.linking.lazy.LazyLinkingResource  - resolution of uriFragment '|0' failed.
java.lang.NullPointerException
	at io.typefox.yang.scoping.ScopeContext$CompositeScope.lambda$3(ScopeContext.java:109)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Iterators$8.transform(Iterators.java:817)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:674)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
	at org.eclipse.xtext.xbase.lib.IteratorExtensions.head(IteratorExtensions.java:145)
	at org.eclipse.xtext.xbase.lib.IterableExtensions.head(IterableExtensions.java:119)
	at io.typefox.yang.scoping.ScopeContext$CompositeScope.getSingleElement(ScopeContext.java:111)
	at io.typefox.yang.scoping.ScopeContext$MapScope.tryAddLocal(ScopeContext.java:65)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$17(ScopeContextProvider.java:605)
	at io.typefox.yang.scoping.ScopeContext.onComputeNodeScope(ScopeContext.java:506)
	at io.typefox.yang.scoping.GroupingInliningScopeContext.onComputeNodeScope(GroupingInliningScopeContext.java:121)
	at io.typefox.yang.scoping.ScopeContextProvider.addToNodeScope(ScopeContextProvider.java:615)
	at io.typefox.yang.scoping.ScopeContextProvider._inlineGrouping(ScopeContextProvider.java:438)
	at io.typefox.yang.scoping.ScopeContextProvider.inlineGrouping(ScopeContextProvider.java:906)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$5(ScopeContextProvider.java:388)
	at io.typefox.yang.scoping.ScopeContext.lambda$11(ScopeContext.java:412)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at io.typefox.yang.scoping.ScopeContext.resolveDefinitionPhase(ScopeContext.java:414)
	at io.typefox.yang.resource.YangResource.getEObject(YangResource.java:42)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:222)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:189)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:148)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:134)
	at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.lambda$launch$6(IncrementalBuilder.java:236)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.lambda$executeClustered$1(ClusteringStorageAwareResourceLoader.java:77)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Lists$TransformingRandomAccessList$1.transform(Lists.java:640)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.addAll(ArrayList.java:577)
	at com.google.common.collect.Iterables.addAll(Iterables.java:350)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.executeClustered(ClusteringStorageAwareResourceLoader.java:80)
	at org.eclipse.xtext.build.BuildContext.executeClustered(BuildContext.java:55)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.launch(IncrementalBuilder.java:251)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:399)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:384)
	at org.eclipse.xtext.ide.server.ProjectManager.doBuild(ProjectManager.java:115)
	at org.eclipse.xtext.ide.server.ProjectManager.doInitialBuild(ProjectManager.java:107)
	at org.eclipse.xtext.ide.server.BuildManager.doInitialBuild(BuildManager.java:149)
	at org.eclipse.xtext.ide.server.WorkspaceManager.refreshWorkspaceConfig(WorkspaceManager.java:148)
	at org.eclipse.xtext.ide.server.WorkspaceManager.initialize(WorkspaceManager.java:117)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$initialize$8(LanguageServerImpl.java:253)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockWrite(RequestManager.java:80)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.initialize(LanguageServerImpl.java:256)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:105)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:203)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:139)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Aug 02, 2017 1:42:23 PM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint lambda$static$0
SEVERE: Internal error: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:53)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:105)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:203)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:139)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	... 11 more
Caused by: org.eclipse.emf.common.util.WrappedException: java.lang.NullPointerException
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:230)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:189)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:148)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:134)
	at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.lambda$launch$6(IncrementalBuilder.java:236)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.lambda$executeClustered$1(ClusteringStorageAwareResourceLoader.java:77)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Lists$TransformingRandomAccessList$1.transform(Lists.java:640)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.addAll(ArrayList.java:577)
	at com.google.common.collect.Iterables.addAll(Iterables.java:350)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.executeClustered(ClusteringStorageAwareResourceLoader.java:80)
	at org.eclipse.xtext.build.BuildContext.executeClustered(BuildContext.java:55)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.launch(IncrementalBuilder.java:251)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:399)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:384)
	at org.eclipse.xtext.ide.server.ProjectManager.doBuild(ProjectManager.java:115)
	at org.eclipse.xtext.ide.server.ProjectManager.doInitialBuild(ProjectManager.java:107)
	at org.eclipse.xtext.ide.server.BuildManager.doInitialBuild(BuildManager.java:149)
	at org.eclipse.xtext.ide.server.WorkspaceManager.refreshWorkspaceConfig(WorkspaceManager.java:148)
	at org.eclipse.xtext.ide.server.WorkspaceManager.initialize(WorkspaceManager.java:117)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$initialize$8(LanguageServerImpl.java:253)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockWrite(RequestManager.java:80)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.initialize(LanguageServerImpl.java:256)
	... 16 more
Caused by: java.lang.NullPointerException
	at io.typefox.yang.scoping.ScopeContext$CompositeScope.lambda$3(ScopeContext.java:109)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Iterators$8.transform(Iterators.java:817)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:674)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
	at org.eclipse.xtext.xbase.lib.IteratorExtensions.head(IteratorExtensions.java:145)
	at org.eclipse.xtext.xbase.lib.IterableExtensions.head(IterableExtensions.java:119)
	at io.typefox.yang.scoping.ScopeContext$CompositeScope.getSingleElement(ScopeContext.java:111)
	at io.typefox.yang.scoping.ScopeContext$MapScope.tryAddLocal(ScopeContext.java:65)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$17(ScopeContextProvider.java:605)
	at io.typefox.yang.scoping.ScopeContext.onComputeNodeScope(ScopeContext.java:506)
	at io.typefox.yang.scoping.GroupingInliningScopeContext.onComputeNodeScope(GroupingInliningScopeContext.java:121)
	at io.typefox.yang.scoping.ScopeContextProvider.addToNodeScope(ScopeContextProvider.java:615)
	at io.typefox.yang.scoping.ScopeContextProvider._inlineGrouping(ScopeContextProvider.java:438)
	at io.typefox.yang.scoping.ScopeContextProvider.inlineGrouping(ScopeContextProvider.java:906)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$5(ScopeContextProvider.java:388)
	at io.typefox.yang.scoping.ScopeContext.lambda$11(ScopeContext.java:412)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at io.typefox.yang.scoping.ScopeContext.resolveDefinitionPhase(ScopeContext.java:414)
	at io.typefox.yang.resource.YangResource.getEObject(YangResource.java:42)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:222)
	... 42 more

Theia Application

In a separate repository (any suggestions for a cool name?) we should start working on a Theia-based YANG tool. First step would be setup and integration of this language server.

Open Symbol

Open symbol should show top level definitions, with simple name and proper kind.

[formatter] Multiline strings

Continuation of #19.

Leading whitespaces should be preserved:

    contact
     "WG Web:   <http://tools.ietf.org/wg/netmod/>
      WG List:  <mailto:[email protected]>
     
      WG Chair: David Kessens
                <mailto:[email protected]>
     
      WG Chair: Juergen Schoenwaelder
                <mailto:[email protected]>
     
      Editor:   Juergen Schoenwaelder
                <mailto:[email protected]>
     ";

Indentation should be fixed:

        "This revision adds the following new data types:
         - yang-identifier
         - hex-string
         - uuid
         - dotted-quad
        ";

Indentation of concatenations should be fixed:

      pattern
        '$0$.*'
        // comment
      + '|$1$[a-zA-Z0-9./]{1,8}$[a-zA-Z0-9./]{22}'
      + '|$5$(rounds=\d+$)?[a-zA-Z0-9./]{1,16}$[a-zA-Z0-9./]{43}'
      + /* comment */ '|$6$(rounds=\d+$)?[a-zA-Z0-9./]{1,16}$[a-zA-Z0-9./]{86}';

[formatter] Indentation broken

The following document doesn't format properly

submodule augment-sub1 {
  belongs-to augment-super {
    prefix "as";
  }

  include augment-sub0;

  augment "/interfaces" {
    list ifEntry {
    key "ifIndex";

    leaf ifIndex {
      type int32;
    }
  }
    leaf llm1 {
    type string;
    mandatory true;
  }
  }
}

Settings

Yang-lsp should look for a .yang-settings.json in the root directory (and possibly later user home).

The settings object should allow the user to change:

severities of issues
configure editing features (e.g. enable/disable code lens)
list plugins

This ticket is only about the infrastructure, to provide an object to any clients that contains the information and provides change events. Could possibly done generically and moved up to Xtext.

Implement linking/scoping for modules and submodules

This ticket is about defining the scopes for modules, submodules. Implementing the support for prefixes and resolution of imports and included.

[template] Allow multiple templates per keyword

I need to provide multliple templates per keyword, not only one.
Seems like it is currently not possible, since the names of the fields in io.typefox.yang.ide.completion.YangTemplateProvider.YangTemplates are used.

Support for YANG 1 and 1.1

Seems like most people still use yang-version 1.
We should support both.

This ticket is about having the cardinality constraints supporting both and enforcing one or the other depending on the specified yang-version(none yang-version specified means 1)

[templates] Use configured indentation

The indentation should be based on IWhitespaceInformationProvider.

Support code completion (CA) for sub-statements based on the cardinalities

and other constraints from the spec.

[content assist] schema node proposals are not absolute

Absolute schema pathes need to start with a/

[linking] link the revision-date

[completion] Add template support

Validate the default value in its container type

https://tools.ietf.org/html/rfc7950#section-7.3.4

For instance when a type is a union of int32 and string, then the default value cannot be an instance of an enumeration.

LS throws exception when the AST is broken

YANG:

module moduleName {
  // yang-version 1.1;
  
 //yan
  y
 
  namespace "urn:someUri";
  prefix "foo";



description "bar";

organization "org";

grouping foo {
        list feuillage {
            description "Local feuillage docstring";
            uses bar {
                refine blatt {
                    default "beech";
                }
            }
            uses baz {
                refine "leaves" {
                    default cz;
                }
                refine "leaves/cz/lupen" {
                    min-elements 0;
                }
                refine "leaves/dustbin/dustbin/hoja" {
                    description "Refined description of hoja";
                }
            }
            key "feuille";
        }
        anyxml rubbish;
    }
  
}

Exception:


java.lang.NullPointerException
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$15(ScopeContextProvider.java:514)
	at io.typefox.yang.scoping.Linker.link(Linker.java:36)
	at io.typefox.yang.scoping.ScopeContextProvider.lambda$14(ScopeContextProvider.java:521)
	at io.typefox.yang.scoping.ScopeContext.lambda$12(ScopeContext.java:426)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at io.typefox.yang.scoping.ScopeContext.resolveAll(ScopeContext.java:428)
	at io.typefox.yang.resource.YangResource.getEObject(YangResource.java:39)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:222)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.doResolveLazyCrossReference(LazyLinkingResource.java:189)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:148)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:134)
	at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.lambda$launch$6(IncrementalBuilder.java:236)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.lambda$executeClustered$1(ClusteringStorageAwareResourceLoader.java:77)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Lists$TransformingRandomAccessList$1.transform(Lists.java:640)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.util.AbstractCollection.toArray(AbstractCollection.java:141)
	at java.util.ArrayList.addAll(ArrayList.java:577)
	at com.google.common.collect.Iterables.addAll(Iterables.java:350)
	at org.eclipse.xtext.build.ClusteringStorageAwareResourceLoader.executeClustered(ClusteringStorageAwareResourceLoader.java:80)
	at org.eclipse.xtext.build.BuildContext.executeClustered(BuildContext.java:55)
	at org.eclipse.xtext.build.IncrementalBuilder$InternalStatefulIncrementalBuilder.launch(IncrementalBuilder.java:251)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:399)
	at org.eclipse.xtext.build.IncrementalBuilder.build(IncrementalBuilder.java:384)
	at org.eclipse.xtext.ide.server.ProjectManager.doBuild(ProjectManager.java:115)
	at org.eclipse.xtext.ide.server.BuildManager.internalBuild(BuildManager.java:182)
	at org.eclipse.xtext.ide.server.BuildManager.lambda$submit$0(BuildManager.java:130)
	at org.eclipse.xtext.ide.server.WorkspaceManager.lambda$didChangeFiles$2(WorkspaceManager.java:174)
	at org.eclipse.xtext.ide.server.LanguageServerImpl$2.apply(LanguageServerImpl.java:327)
	at org.eclipse.xtext.ide.server.LanguageServerImpl$2.apply(LanguageServerImpl.java:325)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lambda$bind$6(RequestManager.java:135)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockWrite(RequestManager.java:80)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lambda$null$0(RequestManager.java:95)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
	at java.util.concurrent.CompletableFuture.postFire(CompletableFuture.java:561)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:580)
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
74365 [pool-3-thread-1] ERROR Indexer$ResolvedResourceDescription  - java.lang.IllegalStateException: getReferenceDescriptions file:///Users/akos.kitta/Desktop/yangster-app/yang-lsp/yang-lsp/io.typefox.yang.ide/src/test/resources/good/amodule.yang
java.lang.IllegalStateException: getReferenceDescriptions file:///Users/akos.kitta/Desktop/yangster-app/yang-lsp/yang-lsp/io.typefox.yang.ide/src/test/resources/good/amodule.yang
	at org.eclipse.xtext.build.Indexer$ResolvedResourceDescription.getReferenceDescriptions(Indexer.java:182)
	at io.typefox.yang.ide.codelens.CodeLensService.lambda$0(CodeLensService.java:106)
	at org.eclipse.xtext.xbase.lib.internal.FunctionDelegate.apply(FunctionDelegate.java:42)
	at com.google.common.collect.Iterators$8.transform(Iterators.java:817)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
	at java.lang.Iterable.forEach(Iterable.java:74)
	at io.typefox.yang.ide.codelens.CodeLensService.computeCodeLenses(CodeLensService.java:114)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$null$32(LanguageServerImpl.java:688)
	at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:284)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$codeLens$33(LanguageServerImpl.java:692)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lambda$bind$6(RequestManager.java:135)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lock(RequestManager.java:146)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lockRead(RequestManager.java:76)
	at org.eclipse.xtext.ide.server.concurrent.RequestManager.lambda$null$2(RequestManager.java:105)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

Connection to local file system

How can I and how should I load, save files to my local filesystem?

Can I work in this and still keep the files in my local file system?

References not correct for nested lists with equal key names

The follow model expose problems with references:

list a {
  key id;
  leaf id {type string;}
  list b {
    key id;
    leaf id {type string;}
  }
}

The b id leaf is marked to have 2 references.

Browser stops responding when trying to enter a new line after a line that has a trailing semicolon

Try this script and enter a new line after namespace "urn:test:amodule";.

module amodule {
/*03*/
  namespace "urn:test:amodule";
/*04*/
  prefix "amodule";
/*05*/

  organization "organização güi";
/*06*/
  contact "àéïç¢ô";
/*07*/

  grouping x {
/*08*/
    leaf y { type string; }
/*09*/
  }
/*10*/

  rpc run {
    input { uses x; }
/*11*/
    output { uses x; }
  }
/*12*/
  container amodule {
/*13*/
    choice z;
  }

  augment /amodule/z {
/*14*/
    container foo {
/*15*/
      leaf a {
        type string;
      }
    }
  }

}

Thread dump from the server:

Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.121-b13 mixed mode):

"pool-6-thread-2" #28 prio=5 os_prio=31 tid=0x00007fee7ed60800 nid=0x7503 runnable [0x00007000027c5000]
   java.lang.Thread.State: RUNNABLE
	at java.lang.Thread.isInterrupted(Native Method)
	at java.lang.Thread.isInterrupted(Thread.java:961)
	at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:441)
	at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
	at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"pool-6-thread-1" #27 prio=5 os_prio=31 tid=0x00007fee7c5ef000 nid=0x7303 runnable [0x00007000026c2000]
   java.lang.Thread.State: RUNNABLE
	at java.lang.Thread.isInterrupted(Native Method)
	at java.lang.Thread.isInterrupted(Thread.java:961)
	at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:441)
	at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
	at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"pool-3-thread-1" #26 prio=5 os_prio=31 tid=0x00007fee82446000 nid=0x7103 runnable [0x00007000025bf000]
   java.lang.Thread.State: RUNNABLE
	at java.lang.Thread.isInterrupted(Native Method)
	at java.lang.Thread.isInterrupted(Thread.java:961)
	at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:441)
	at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
	at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"RequestManager-Queue-0" #25 daemon prio=5 os_prio=31 tid=0x00007fee7cd5f800 nid=0x1007 waiting on condition [0x00007000024bc000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077c9b6560> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"pool-1-thread-1" #24 prio=5 os_prio=31 tid=0x00007fee8087d800 nid=0x1407 waiting on condition [0x00007000023b9000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000076f74b800> (a java.util.concurrent.CountDownLatch$Sync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
	at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
	at sun.nio.ch.PendingFuture.get(PendingFuture.java:180)
	at java.nio.channels.Channels$2.read(Channels.java:239)
	- locked <0x000000077c923df0> (a java.nio.channels.Channels$2)
	at java.io.InputStream.read(InputStream.java:101)
	at java.nio.channels.Channels$2.read(Channels.java:211)
	- locked <0x000000077c923df0> (a java.nio.channels.Channels$2)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:61)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-10" #23 daemon prio=5 os_prio=31 tid=0x00007fee7d0d1000 nid=0x6f03 waiting on condition [0x00007000022b6000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-9" #22 daemon prio=5 os_prio=31 tid=0x00007fee7c81b800 nid=0x6d03 waiting on condition [0x00007000021b3000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-8" #21 daemon prio=5 os_prio=31 tid=0x00007fee7d1f0800 nid=0x6b03 runnable [0x00007000020b0000]
   java.lang.Thread.State: RUNNABLE
	at sun.nio.ch.KQueue.keventPoll(Native Method)
	at sun.nio.ch.KQueuePort$EventHandlerTask.poll(KQueuePort.java:196)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:276)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-7" #20 daemon prio=5 os_prio=31 tid=0x00007fee7bd70000 nid=0x6903 waiting on condition [0x0000700001fad000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-6" #19 daemon prio=5 os_prio=31 tid=0x00007fee7d8a3800 nid=0x6703 waiting on condition [0x0000700001eaa000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-5" #18 daemon prio=5 os_prio=31 tid=0x00007fee7bd6f000 nid=0x6503 waiting on condition [0x0000700001da7000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-4" #17 daemon prio=5 os_prio=31 tid=0x00007fee7be03000 nid=0x6303 waiting on condition [0x0000700001ca4000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-3" #16 daemon prio=5 os_prio=31 tid=0x00007fee7d8a3000 nid=0x6103 waiting on condition [0x0000700001ba1000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

"Thread-2" #15 daemon prio=5 os_prio=31 tid=0x00007fee79c9c000 nid=0x5f03 waiting on condition [0x0000700001a9e000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85ee50> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
	at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:270)
	at java.lang.Thread.run(Thread.java:745)

"EMF Reference Cleaner" #13 daemon prio=5 os_prio=31 tid=0x00007fee7b1bf000 nid=0x5d03 in Object.wait() [0x000070000199b000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	- locked <0x00000006c000ee98> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	at org.eclipse.emf.common.util.CommonUtil$1ReferenceClearingQueuePollingThread.run(CommonUtil.java:70)

"Service Thread" #12 daemon prio=9 os_prio=31 tid=0x00007fee7b82a800 nid=0x5903 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread3" #11 daemon prio=9 os_prio=31 tid=0x00007fee7b00e800 nid=0x5703 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread2" #10 daemon prio=9 os_prio=31 tid=0x00007fee7b036000 nid=0x5503 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" #9 daemon prio=9 os_prio=31 tid=0x00007fee7b82e000 nid=0x5303 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #8 daemon prio=9 os_prio=31 tid=0x00007fee7a014800 nid=0x5103 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"JDWP Command Reader" #7 daemon prio=10 os_prio=31 tid=0x00007fee7c800000 nid=0x4f03 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"JDWP Event Helper Thread" #6 daemon prio=10 os_prio=31 tid=0x00007fee7b82d000 nid=0x4d03 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"JDWP Transport Listener: dt_socket" #5 daemon prio=10 os_prio=31 tid=0x00007fee7b82c800 nid=0x4b03 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=31 tid=0x00007fee79876000 nid=0x4903 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=31 tid=0x00007fee7b826800 nid=0x3903 in Object.wait() [0x0000700000e7a000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
	- locked <0x00000006c0026820> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" #2 daemon prio=10 os_prio=31 tid=0x00007fee7b007000 nid=0x3703 in Object.wait() [0x0000700000d77000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
	- locked <0x00000006c000f6d8> (a java.lang.ref.Reference$Lock)
	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

"main" #1 prio=5 os_prio=31 tid=0x00007fee7a002000 nid=0x1c03 waiting on condition [0x0000700000359000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x000000077b85e518> (a java.util.concurrent.CountDownLatch$Sync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
	at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
	at sun.nio.ch.PendingFuture.get(PendingFuture.java:180)
	at io.typefox.yang.diagram.RunSocketServer.main(RunSocketServer.java:66)

"VM Thread" os_prio=31 tid=0x00007fee7b822000 nid=0x3503 runnable 

"GC task thread#0 (ParallelGC)" os_prio=31 tid=0x00007fee7980d800 nid=0x2503 runnable 

"GC task thread#1 (ParallelGC)" os_prio=31 tid=0x00007fee7980e800 nid=0x2703 runnable 

"GC task thread#2 (ParallelGC)" os_prio=31 tid=0x00007fee7980f000 nid=0x2903 runnable 

"GC task thread#3 (ParallelGC)" os_prio=31 tid=0x00007fee7980f800 nid=0x2b03 runnable 

"GC task thread#4 (ParallelGC)" os_prio=31 tid=0x00007fee79810000 nid=0x2d03 runnable 

"GC task thread#5 (ParallelGC)" os_prio=31 tid=0x00007fee79811000 nid=0x2f03 runnable 

"GC task thread#6 (ParallelGC)" os_prio=31 tid=0x00007fee79811800 nid=0x3103 runnable 

"GC task thread#7 (ParallelGC)" os_prio=31 tid=0x00007fee79812000 nid=0x3303 runnable 

"VM Periodic Task Thread" os_prio=31 tid=0x00007fee7c011800 nid=0x5b03 waiting on condition 

JNI global references: 5340

Heap
 PSYoungGen      total 310272K, used 201178K [0x000000076ab00000, 0x0000000788f80000, 0x00000007c0000000)
  eden space 275456K, 62% used [0x000000076ab00000,0x0000000775351820,0x000000077b800000)
  from space 34816K, 82% used [0x000000077b800000,0x000000077d425348,0x000000077da00000)
  to   space 37888K, 0% used [0x0000000786a80000,0x0000000786a80000,0x0000000788f80000)
 ParOldGen       total 109056K, used 40590K [0x00000006c0000000, 0x00000006c6a80000, 0x000000076ab00000)
  object space 109056K, 37% used [0x00000006c0000000,0x00000006c27a3800,0x00000006c6a80000)
 Metaspace       used 29252K, capacity 30218K, committed 30464K, reserved 1075200K
  class space    used 3563K, capacity 3749K, committed 3840K, reserved 1048576K

[diagram] Support uses statement

they seem to be ignored atm

[validation] missleading error message

In this context

...

  organization "organização güi";
  contact "àéïç¢ô";

  import d {
     prefix "test";
  }
...

I get the error message Substatement 'import' must be declared before 'contact'..
It has to be before organization.

[diagram] Add implicit case node

schema elements (container, list, leaf-list, leaf) that are direct children of a choice node, get an implicit case node using the same name as the schema node.

Use executeCommandProvider instead of expecting command on client side.

Currently a command to apply workspace edits needs to be registered on the client side. We should instead make use of executeCommandProvider workspace/executeCommand and workspace/applyEdits.

Contribution of actions that work on Yang files

We dearly need a way to contribute actions in the Yangster GUI provided by Theia, so that we can hook in our own transformations that work on Yang files. There are already a few existing transformations that the user of the Ericsson extended Yangster must have available by (for example) right-clicking on the Yang file(s):

A pre-processor that generates a target specific version of the Yang file
A generator for database schema for the configuration store back end

The generated result may be any format (yang, xml, ...) and is expected to show up in the Files view.

SubStatement Validation

To find some of the remaining issues in the substatement validation, unignore
https://github.com/yang-tools/yang-lsp/blob/master/io.typefox.yang.parent/io.typefox.yang.ide/src/test/java/io/typefox/yang/tests/integration/GoodTests.xtend#L54

and review the results.

XpathExpressions are not serializable

For example, instance of when "foo!=42" is not serializable.

Error message is:

java.lang.RuntimeException: Could not serialize XpathBinaryOperation via backtracking.
Constraint: XpathAdditiveExpr_XpathAndExpr_XpathEqualityExpr_XpathMultiplicativeExpr_XpathOrExpr_XpathRelationalExpr_XpathUnionExpr_XpathBinaryOperation returns XpathBinaryOperation: (
    (left=XpathOrExpr_XpathBinaryOperation_1_0 operator='or' right=XpathAndExpr) | 
    (left=XpathAndExpr_XpathBinaryOperation_1_0 operator='and' right=XpathEqualityExpr) | 
    (left=XpathEqualityExpr_XpathBinaryOperation_1_0 (operator='=' | operator='!=') right=XpathRelationalExpr) | 
    (left=XpathRelationalExpr_XpathBinaryOperation_1_0 (operator='<' | operator='>' | operator='<=' | operator='>=') right=XpathAdditiveExpr) | 
    (left=XpathAdditiveExpr_XpathBinaryOperation_1_0 (operator='+' | operator='-') right=XpathMultiplicativeExpr) | 
    (left=XpathMultiplicativeExpr_XpathBinaryOperation_1_0 (operator='*' | operator='div' | operator='mod') right=XpathMultiplicativeExpr) | 
    (left=XpathUnionExpr_XpathBinaryOperation_1_0 operator='|' right=XpathUnionExpr)
);
Values: left(1), operator(1), right(1)
Semantic Object: Module'augtest'.substatements[3]->Rpc'agoj'.substatements[0]->Input.substatements[0]->Uses.substatements[0]->Augment.substatements[0]->When.condition->XpathBinaryOperation
URI: __synthetic0.yang
Context: XpathExpression returns XpathBinaryOperation

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