Add XQuery Execution

package.json

@@ -44,6 +44,10 @@
 			{
 				"command": "xmlTools.evaluateXPath",
 				"title": "XML Tools: Evaluate XPath"
+			},
+            {
+                "command": "xmlTools.executeXQuery",
+                "title": "XML Tools: Execute XQuery"
             }
 		],
         "configuration": {
@@ -64,6 +68,16 @@
                     "type": "boolean",
                     "default": true,
                     "description": "Put each xmlns attribute on a new line when fromatting XML."
+                },
+                "xmlTools.xqueryExecutionEngine": {
+                    "type": "string",
+                    "default": "",
+                    "description": "The full path to the execution engine executable."
+                },
+                "xmlTools.xqueryExecutionArguments": {
+                    "type": "array",
+                    "default": ["-xquery", "$(script)", "-in", "$(input)", "-out", "$(input).output.xml"],
+                    "description": "Arguments to be passed to the execution engine. '$(script)' and '$(input)' refer to the XQuery script and input XML file, respectively."
                 }
             }
         },

src/Commands.ts

@@ -6,6 +6,7 @@ import * as xpath from 'xpath';
 import { RangeUtil } from './utils/RangeUtil';
 import { XmlFormatter } from './services/XmlFormatter';
 import { XPathFeatureProvider } from './providers/XPath';
+import { XQueryExecutionProvider } from './providers/Execution';
 
 const CFG_SECTION: string = 'xmlTools';
 const CFG_REMOVE_COMMENTS: string = 'removeCommentsOnMinify';
@@ -30,4 +31,8 @@ export class TextEditorCommands {
     static evaluateXPath(editor: vsc.TextEditor, edit: vsc.TextEditorEdit): void {
         XPathFeatureProvider.evaluateXPathAsync(editor, edit);
     }
+    
+    static executeXQuery(editor: vsc.TextEditor, edit: vsc.TextEditorEdit): void {
+        XQueryExecutionProvider.executeXQueryAsync(editor);
+    }
 }

src/Extension.ts

@@ -22,7 +22,9 @@ export function activate(ctx: vsc.ExtensionContext) {
     ctx.subscriptions.push(
         vsc.commands.registerTextEditorCommand('xmlTools.minifyXml', TextEditorCommands.minifyXml),
         vsc.commands.registerTextEditorCommand('xmlTools.formatXml', TextEditorCommands.formatXml),
-        vsc.commands.registerTextEditorCommand('xmlTools.evaluateXPath', TextEditorCommands.evaluateXPath)
+        vsc.commands.registerTextEditorCommand('xmlTools.evaluateXPath', TextEditorCommands.evaluateXPath),
+        
+        vsc.commands.registerTextEditorCommand('xmlTools.executeXQuery', TextEditorCommands.executeXQuery)
     );
 	
 	// register language feature providers

src/providers/Execution.ts

@@ -0,0 +1,59 @@
+'use strict';
+
+import * as vsc from 'vscode';
+import { ChildProcess } from '../services/ChildProcess';
+
+const CFG_SECTION: string = 'xmlTools';
+const CFG_XQEXEC: string = 'xqueryExecutionEngine';
+const CFG_XQARGS: string = 'xqueryExecutionArguments';
+
+export class XQueryExecutionProvider {
+    static async executeXQueryAsync(editor: vsc.TextEditor): Promise<void> {
+        if (editor.document.languageId !== 'xquery') {
+            vsc.window.showErrorMessage('This action can only be performed on an XQuery file.');
+            return;
+        }
+        
+        let executable = vsc.workspace.getConfiguration(CFG_SECTION).get<string>(CFG_XQEXEC, null);
+        let args = vsc.workspace.getConfiguration(CFG_SECTION).get<string[]>(CFG_XQARGS, []);
+        
+        if (!executable || executable == '') {
+            let action = await vsc.window.showWarningMessage('An XQuery execution engine has not been defined.', 'Define Now');
+            
+            if (action == 'Define Now') {
+                vsc.commands.executeCommand('workbench.action.openGlobalSettings');
+            }
+            
+            return;
+        }
+        
+        let files: vsc.Uri[] = await vsc.workspace.findFiles('**/*.xml', '', 100);
+        
+        let qpItems: any[] = new Array<any>();
+        
+        files.forEach((file) => {
+            let filename: string = file.fsPath.replace('\\', '/');
+            
+            qpItems.push({ // must implement vscode.QuickPickItem
+                label: filename.substring(filename.lastIndexOf('/') + 1),
+                description: file.fsPath,
+                file: file
+            });
+        });
+        
+        let selection = await vsc.window.showQuickPick(qpItems, { placeHolder: 'Please select an input file.' });
+        
+        if (!selection) {
+            return;
+        }
+        
+        let disposable: vsc.Disposable = vsc.window.setStatusBarMessage('Executing XQuery Script...');
+        args = args.map<string>((value: string) => {
+            return value
+                .replace('$(script)', editor.document.uri.fsPath)
+                .replace('$(input)', selection.file.fsPath);
+        });
+        await ChildProcess.spawnAsync(executable, args);
+        disposable.dispose();
+    }
+}

src/services/ChildProcess.ts

@@ -0,0 +1,23 @@
+'use strict';
+
+let child_process = require('child_process');
+
+export class ChildProcess {
+    static async spawnAsync(executable: string, args: string[]): Promise<void> {
+        return new Promise<void>((resolve, reject) => {
+           
+           let handle = child_process.spawn(executable, args);
+           
+           handle.on('close', (code: string) => {
+               if (code == '0') {
+                   resolve();
+               }
+               
+               else {
+                   reject(code);
+               }
+           });
+            
+        });
+    }
+}