Add descriptions to completion item detail

actions-languageservice/src/complete.test.ts

@@ -286,6 +286,11 @@ jobs:
       "with",
       "working-directory"
     ]);
+
+    // Includes detail when available. Using continue-on-error as a sample here.
+    expect(result.map(x => x.detail)).toContain(
+      "Prevents a job from failing when a step fails. Set to true to allow a job to pass when this step fails."
+    );
   });
 
   it("loose mapping keys have no completion suggestions", async () => {
@@ -301,4 +306,27 @@ on:
     const result = await complete(...getPositionFromCursor(input));
     expect(result).toHaveLength(0);
   });
+
+  it("well known mapping keys have descriptions", async () => {
+    const input = `
+o|
+`;
+    const result = await complete(...getPositionFromCursor(input));
+    const onResult = result.find(x => x.label === "on");
+    expect(onResult).not.toBeUndefined();
+    expect(onResult?.detail).toEqual(
+      "The name of the GitHub event that triggers the workflow. You can provide a single event string, array of events, array of event types, or an event configuration map that schedules a workflow or restricts the execution of a workflow to specific files, tags, or branch changes. For a list of available events, see https://help.github.com/en/github/automating-your-workflow-with-github-actions/events-that-trigger-workflows."
+    );
+  });
+
+  it("event list includes descriptions when available ", async () => {
+    const input = `
+    on: [check_run, |]`;
+    const result = await complete(...getPositionFromCursor(input));
+    const dispatchResult = result.find(x => x.label === "workflow_dispatch");
+    expect(dispatchResult).not.toBeUndefined();
+    expect(dispatchResult?.detail).toEqual(
+      "You can now create workflows that are manually triggered with the new workflow_dispatch event. You will then see a 'Run workflow' button on the Actions tab, enabling you to easily trigger a run."
+    );
+  });
 });

actions-languageservice/src/complete.ts

@@ -91,7 +91,11 @@ export async function complete(
   }
 
   const values = await getValues(token, keyToken, parent, valueProviderConfig, workflowContext);
-  return values.map(value => CompletionItem.create(value.label));
+  return values.map(value => {
+    const item = CompletionItem.create(value.label);
+    item.detail = value.description;
+    return item;
+  });
 }
 
 async function getValues(

actions-languageservice/src/value-providers/definition.ts

@@ -12,7 +12,7 @@ export function definitionValues(def: Definition): Value[] {
   const schema = getWorkflowSchema();
 
   if (def instanceof MappingDefinition) {
-    return mappingValues(def);
+    return mappingValues(def, schema.definitions);
   }
 
   if (def instanceof OneOfDefinition) {
@@ -24,7 +24,12 @@ export function definitionValues(def: Definition): Value[] {
   }
 
   if (def instanceof StringDefinition && def.constant) {
-    return stringsToValues([def.constant]);
+    return [
+      {
+        label: def.constant,
+        description: def.description
+      }
+    ];
   }
 
   if (def instanceof SequenceDefinition) {
@@ -37,10 +42,15 @@ export function definitionValues(def: Definition): Value[] {
   return [];
 }
 
-function mappingValues(mappingDefinition: MappingDefinition): Value[] {
+function mappingValues(mappingDefinition: MappingDefinition, definitions: {[key: string]: Definition}): Value[] {
   const properties: Value[] = [];
   for (const [key, value] of Object.entries(mappingDefinition.properties)) {
-    properties.push({label: key, description: value.description});
+    let description: string | undefined;
+    if (value.type) {
+      const typeDef = definitions[value.type];
+      description = typeDef?.description;
+    }
+    properties.push({label: key, description: description});
   }
   return properties;
 }

package-lock.json

@@ -9,6 +9,9 @@
         "actions-languageservice",
         "actions-languageserver"
       ],
+      "dependencies": {
+        "@github/actions-workflow-parser": "^0.0.25"
+      },
       "devDependencies": {
         "lerna": "^6.0.3"
       }

package.json

@@ -7,5 +7,8 @@
   "devDependencies": {
     "lerna": "^6.0.3"
   },
-  "name": "actions-languageservices"
+  "name": "actions-languageservices",
+  "dependencies": {
+    "@github/actions-workflow-parser": "^0.0.25"
+  }
 }