Use gogetdoc instead of godef and godoc

.travis.yml

@@ -23,6 +23,7 @@ install:
   - npm run vscode:prepublish
   - go get -u -v github.com/nsf/gocode
   - go get -u -v github.com/rogpeppe/godef
+  - if [[ "$(go version)" =~ "go version go1.5" ]]; then echo hello; else go get -u -v github.com/zmb3/gogetdoc; fi
   - if [[ "$(go version)" =~ "go version go1.5" ]]; then echo cannot get golint; else go get -u -v github.com/golang/lint/golint; fi
   - go get -u -v github.com/lukehoban/go-outline
   - go get -u -v sourcegraph.com/sqs/goreturns
@@ -32,8 +33,8 @@ install:
   - go get -u -v golang.org/x/tools/cmd/guru
   - go get -u -v github.com/alecthomas/gometalinter
   - go get -u -v github.com/cweill/gotests/...
-  - GO15VENDOREXPERIMENT=1 
-  - if [[ "$(go version)" =~ "go version go1.5" ]]; then echo skipping gometalinter; else gometalinter --install; fi 
+  - GO15VENDOREXPERIMENT=1
+  - if [[ "$(go version)" =~ "go version go1.5" ]]; then echo skipping gometalinter; else gometalinter --install; fi
 
 script:
   - npm run lint

README.md

@@ -10,10 +10,10 @@ Read the [Release Notes](https://github.com/Microsoft/vscode-go/wiki/Release-Not
 This extension adds rich language support for the Go language to VS Code, including:
 
 - Completion Lists (using `gocode`)
-- Signature Help (using `godoc`)
+- Signature Help (using `gogetdoc` or `godef`+`godoc`)
 - Snippets
-- Quick Info (using `godef`)
-- Goto Definition (using `godef`)
+- Quick Info (using `gogetdoc` or `godef`+`godoc`)
+- Goto Definition (using `gogetdoc` or `godef`+`godoc`)
 - Find References (using `guru`)
 - File outline (using `go-outline`)
 - Workspace symbol search (using `go-symbols`)
@@ -199,6 +199,7 @@ The extension uses the following tools, installed in the current GOPATH.  If any
 
 - gocode: `go get -u -v github.com/nsf/gocode`
 - godef: `go get -u -v github.com/rogpeppe/godef`
+- gogetdoc: `go get -u -v github.com/zmb3/gogetdoc`
 - golint: `go get -u -v github.com/golang/lint/golint`
 - go-outline: `go get -u -v github.com/lukehoban/go-outline`
 - goreturns: `go get -u -v sourcegraph.com/sqs/goreturns`
@@ -212,6 +213,7 @@ To install them just paste and run:
 ```bash
 go get -u -v github.com/nsf/gocode
 go get -u -v github.com/rogpeppe/godef
+go get -u -v github.com/zmb3/gogetdoc
 go get -u -v github.com/golang/lint/golint
 go get -u -v github.com/lukehoban/go-outline
 go get -u -v sourcegraph.com/sqs/goreturns

package.json

@@ -178,7 +178,12 @@
                 "default": "."
               },
               "mode": {
-                "enum": ["debug", "remote", "test", "exec"],
+                "enum": [
+                  "debug",
+                  "remote",
+                  "test",
+                  "exec"
+                ],
                 "description": "One of 'debug', 'remote', 'test', 'exec'.",
                 "default": "debug"
               },
@@ -295,7 +300,12 @@
         "go.formatTool": {
           "type": "string",
           "default": "goreturns",
-          "description": "Pick 'gofmt', 'goimports' or 'goreturns' to run on format."
+          "description": "Pick 'gofmt', 'goimports' or 'goreturns' to run on format.",
+          "enum": [
+            "gofmt",
+            "goimports",
+            "goreturns"
+          ]
         },
         "go.formatFlags": {
           "type": "array",
@@ -365,6 +375,15 @@
           "type": "boolean",
           "default": true,
           "description": "Autocomplete members from unimported packages."
+        },
+        "go.docsTool": {
+          "type": "string",
+          "default": "godoc",
+          "description": "Pick 'godoc' or 'gogetdoc' to get documentation. In Go 1.5, godoc is used regardless of the choice here.",
+          "enum": [
+            "godoc",
+            "gogetdoc"
+          ]
         }
       }
     }

src/goDeclaration.ts

@@ -11,16 +11,31 @@ import path = require('path');
 import { getBinPath } from './goPath';
 import { byteOffsetAt } from './util';
 import { promptForMissingTool } from './goInstallTools';
+import { getGoVersion, SemVersion } from './util';
 
 export interface GoDefinitionInformtation {
 	file: string;
 	line: number;
-	col: number;
-	lines: string[];
+	column: number;
 	doc: string;
+	declarationlines: string[];
+	name: string;
+	toolUsed: string;
 }
 
-export function definitionLocation(document: vscode.TextDocument, position: vscode.Position, includeDocs = true): Promise<GoDefinitionInformtation> {
+export function definitionLocation(document: vscode.TextDocument, position: vscode.Position, toolForDocs: string, includeDocs = true): Promise<GoDefinitionInformtation> {
+	return getGoVersion().then((ver: SemVersion) => {
+		if (!ver) {
+			return Promise.resolve(null);
+		}
+		if (toolForDocs === 'godoc' || ver.major < 1 || (ver.major === 1 && ver.minor < 6)) {
+			return definitionLocation_godef(document, position, includeDocs);
+		}
+		return definitionLocation_gogetdoc(document, position);
+	});
+}
+
+function definitionLocation_godef(document: vscode.TextDocument, position: vscode.Position, includeDocs = true): Promise<GoDefinitionInformtation> {
 	return new Promise<GoDefinitionInformtation>((resolve, reject) => {
 
 		let wordAtPosition = document.getWordRangeAtPosition(position);
@@ -50,9 +65,11 @@ export function definitionLocation(document: vscode.TextDocument, position: vsco
 				let definitionInformation: GoDefinitionInformtation = {
 					file: file,
 					line: +line - 1,
-					col: + col - 1,
-					lines,
-					doc: undefined
+					column: + col - 1,
+					declarationlines: lines.splice(1),
+					toolUsed: 'godef',
+					doc: null,
+					name: null
 				};
 				if (!includeDocs) {
 					return resolve(definitionInformation);
@@ -87,15 +104,70 @@ export function definitionLocation(document: vscode.TextDocument, position: vsco
 	});
 }
 
+function definitionLocation_gogetdoc(document: vscode.TextDocument, position: vscode.Position): Promise<GoDefinitionInformtation> {
+	return new Promise<GoDefinitionInformtation>((resolve, reject) => {
+		let wordAtPosition = document.getWordRangeAtPosition(position);
+		let offset = byteOffsetAt(document, position);
+		let gogetdoc = getBinPath('gogetdoc');
+		let p = cp.execFile(gogetdoc, ['-u', '-json', '-modified', '-pos', document.fileName + ':#' + offset.toString()], {}, (err, stdout, stderr) => {
+			try {
+				if (err && (<any>err).code === 'ENOENT') {
+					promptForMissingTool('gogetdoc');
+				}
+				if (err) return resolve(null);
+				let goGetDocOutput = <GoGetDocOuput>JSON.parse(stdout.toString());
+				let match = /(.*):(\d+):(\d+)/.exec(goGetDocOutput.pos);
+				let definitionInfo = {
+					file: null,
+					line: 0,
+					column: 0,
+					toolUsed: 'gogetdoc',
+					declarationlines: goGetDocOutput.decl.split('\n'),
+					doc: goGetDocOutput.doc,
+					name: goGetDocOutput.name
+				};
+				if (!match) {
+					return resolve(definitionInfo);
+				}
+				let [_, file, line, col] = match;
+				definitionInfo.file = match[1];
+				definitionInfo.line = +match[2] - 1;
+				definitionInfo.column = +match[3] - 1;
+				return resolve(definitionInfo);
+
+			} catch (e) {
+				reject(e);
+			}
+		});
+		let documentText = document.getText();
+		let documentArchive = document.fileName + '\n';
+		documentArchive = documentArchive + Buffer.byteLength(documentText) + '\n';
+		documentArchive = documentArchive + documentText;
+		p.stdin.end(documentArchive);
+	});
+}
+
 export class GoDefinitionProvider implements vscode.DefinitionProvider {
+	private toolForDocs = 'godoc';
+
+	constructor(toolForDocs: string) {
+		this.toolForDocs = toolForDocs;
+	}
 
 	public provideDefinition(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken): Thenable<vscode.Location> {
-		return definitionLocation(document, position, false).then(definitionInfo => {
-			if (definitionInfo == null) return null;
+		return definitionLocation(document, position, this.toolForDocs, false).then(definitionInfo => {
+			if (definitionInfo == null || definitionInfo.file == null) return null;
 			let definitionResource = vscode.Uri.file(definitionInfo.file);
-			let pos = new vscode.Position(definitionInfo.line, definitionInfo.col);
+			let pos = new vscode.Position(definitionInfo.line, definitionInfo.column);
 			return new vscode.Location(definitionResource, pos);
 		});
 	}
+}
 
+interface GoGetDocOuput {
+	name: string;
+	import: string;
+	decl: string;
+	doc: string;
+	pos: string;
 }

src/goExtraInfo.ts

@@ -9,30 +9,25 @@ import { HoverProvider, Hover, MarkedString, TextDocument, Position, Cancellatio
 import { definitionLocation } from './goDeclaration';
 
 export class GoHoverProvider implements HoverProvider {
+	private toolForDocs = 'godoc';
+
+	constructor(toolForDocs: string) {
+		this.toolForDocs = toolForDocs;
+	}
+
 	public provideHover(document: TextDocument, position: Position, token: CancellationToken): Thenable<Hover> {
-		return definitionLocation(document, position, true).then(definitionInfo => {
+		return definitionLocation(document, position, this.toolForDocs, true).then(definitionInfo => {
 			if (definitionInfo == null) return null;
-			let lines = definitionInfo.lines;
-			lines = lines.map(line => {
-				if (line.indexOf('\t') === 0) {
-					line = line.slice(1);
-				}
-				return line.replace(/\t/g, '  ');
-			});
-			lines = lines.filter(line => line.length !== 0);
-			if (lines.length > 10) lines[9] = '...';
+			let lines = definitionInfo.declarationlines
+				.filter(line => !line.startsWith('\t//') && line !== '')
+				.map(line => line.replace(/\t/g, '    '));
 			let text;
-			if (lines.length > 1) {
-				text = lines.slice(1, 10).join('\n');
-				text = text.replace(/\n+$/, '');
-			} else {
-				text = lines[0];
-			}
+			text = lines.join('\n').replace(/\n+$/, '');
 			let hoverTexts: MarkedString[] = [];
+			hoverTexts.push({ language: 'go', value: text });
 			if (definitionInfo.doc != null) {
 				hoverTexts.push(definitionInfo.doc);
 			}
-			hoverTexts.push({ language: 'go', value: text});
 			let hover = new Hover(hoverTexts);
 			return hover;
 		});

src/goInstallTools.ts

@@ -22,13 +22,19 @@ function getTools(goVersion: SemVersion): { [key: string]: string } {
 	let tools: { [key: string]: string } = {
 		'gocode': 'github.com/nsf/gocode',
 		'gopkgs': 'github.com/tpng/gopkgs',
-		'godef': 'github.com/rogpeppe/godef',
 		'go-outline': 'github.com/lukehoban/go-outline',
 		'go-symbols': 'github.com/newhook/go-symbols',
 		'guru': 'golang.org/x/tools/cmd/guru',
 		'gorename': 'golang.org/x/tools/cmd/gorename'
 	};
 
+	// Install the doc/def tool that was chosen by the user
+	if (goConfig['docsTool'] === 'godoc') {
+		tools['godef'] = 'github.com/rogpeppe/godef';
+	} else if (goConfig['docsTool'] === 'gogetdoc') {
+		tools['gogetdoc'] = 'github.com/zmb3/gogetdoc';
+	}
+
 	// Install the formattool that was chosen by the user
 	if (goConfig['formatTool'] === 'goimports') {
 		tools['goimports'] = 'golang.org/x/tools/cmd/goimports';

src/goMain.ts

@@ -35,15 +35,15 @@ let goFormatOnSaveDeprecated = true;
 
 export function activate(ctx: vscode.ExtensionContext): void {
 
-	ctx.subscriptions.push(vscode.languages.registerHoverProvider(GO_MODE, new GoHoverProvider()));
+	ctx.subscriptions.push(vscode.languages.registerHoverProvider(GO_MODE, new GoHoverProvider(vscode.workspace.getConfiguration('go')['docsTool'])));
 	ctx.subscriptions.push(vscode.languages.registerCompletionItemProvider(GO_MODE, new GoCompletionItemProvider(), '.', '\"'));
-	ctx.subscriptions.push(vscode.languages.registerDefinitionProvider(GO_MODE, new GoDefinitionProvider()));
+	ctx.subscriptions.push(vscode.languages.registerDefinitionProvider(GO_MODE, new GoDefinitionProvider(vscode.workspace.getConfiguration('go')['docsTool'])));
 	ctx.subscriptions.push(vscode.languages.registerReferenceProvider(GO_MODE, new GoReferenceProvider()));
 	ctx.subscriptions.push(vscode.languages.registerDocumentFormattingEditProvider(GO_MODE, new GoDocumentFormattingEditProvider()));
 	ctx.subscriptions.push(vscode.languages.registerDocumentSymbolProvider(GO_MODE, new GoDocumentSymbolProvider()));
 	ctx.subscriptions.push(vscode.languages.registerWorkspaceSymbolProvider(new GoWorkspaceSymbolProvider()));
 	ctx.subscriptions.push(vscode.languages.registerRenameProvider(GO_MODE, new GoRenameProvider()));
-	ctx.subscriptions.push(vscode.languages.registerSignatureHelpProvider(GO_MODE, new GoSignatureHelpProvider(), '(', ','));
+	ctx.subscriptions.push(vscode.languages.registerSignatureHelpProvider(GO_MODE, new GoSignatureHelpProvider(vscode.workspace.getConfiguration('go')['docsTool']), '(', ','));
 	ctx.subscriptions.push(vscode.languages.registerCodeActionsProvider(GO_MODE, new GoCodeActionProvider()));
 
 	diagnosticCollection = vscode.languages.createDiagnosticCollection('go');