Issue #32: Compute best path for node and VSCode language servers

Author: mickaelistria

org.eclipse.languageserver/src/org/eclipse/languageserver/languages/InitializeLaunchConfigurations.java

@@ -10,9 +10,14 @@
  *******************************************************************************/
 package org.eclipse.languageserver.languages;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.commons.io.IOUtils;
 import org.eclipse.core.externaltools.internal.IExternalToolConstants;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform;
@@ -61,7 +66,7 @@ public void earlyStartup() {
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_SHOW_CONSOLE, false);
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_BUILD_SCOPE, "${none}");
 				workingCopy.setAttribute(DebugPlugin.ATTR_CAPTURE_OUTPUT, true);
-				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, "/usr/bin/node");
+				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, getNodeJsLocation());
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_TOOL_ARGUMENTS, "/home/mistria/git/omnisharp-node-client/languageserver/server.js");
 				workingCopy.setAttribute(ILaunchManager.ATTR_APPEND_ENVIRONMENT_VARIABLES, true);
 				Map<String, String> environment = new HashMap<>(1);
@@ -90,10 +95,10 @@ public void earlyStartup() {
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_SHOW_CONSOLE, false);
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_BUILD_SCOPE, "${none}");
 				workingCopy.setAttribute(DebugPlugin.ATTR_CAPTURE_OUTPUT, true);
-				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, "/usr/bin/node");
+				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, getNodeJsLocation());
 				// Assume node is already installed on machine and uses it
 				// TODO: implement smarter and multi-platform discovery
-				workingCopy.setAttribute(IExternalToolConstants.ATTR_TOOL_ARGUMENTS, "/usr/share/code/resources/app/extensions/css/server/out/cssServerMain.js --stdio");
+				workingCopy.setAttribute(IExternalToolConstants.ATTR_TOOL_ARGUMENTS, getVSCodeLocation() + "/resources/app/extensions/css/server/out/cssServerMain.js --stdio");
 				omniSharpLauch = workingCopy.doSave();
 				registry.registerAssociation(contentTypeManager.getContentType("org.eclipse.wst.css.core.csssource"), LaunchConfigurationStreamProvider.findLaunchConfiguration(IExternalToolConstants.ID_PROGRAM_LAUNCH_CONFIGURATION_TYPE, InitializeLaunchConfigurations.VSCODE_CSS_NAME));
 			}
@@ -117,10 +122,10 @@ public void earlyStartup() {
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_SHOW_CONSOLE, false);
 				workingCopy.setAttribute(IExternalToolConstants.ATTR_BUILD_SCOPE, "${none}");
 				workingCopy.setAttribute(DebugPlugin.ATTR_CAPTURE_OUTPUT, true);
-				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, "/usr/bin/node");
+				workingCopy.setAttribute(IExternalToolConstants.ATTR_LOCATION, getNodeJsLocation());
 				// Assume node is already installed on machine and uses it
 				// TODO: implement smarter and multi-platform discovery
-				workingCopy.setAttribute(IExternalToolConstants.ATTR_TOOL_ARGUMENTS, "/usr/share/code/resources/app/extensions/json/server/out/jsonServerMain.js --stdio");
+				workingCopy.setAttribute(IExternalToolConstants.ATTR_TOOL_ARGUMENTS, getVSCodeLocation() + "/resources/app/extensions/json/server/out/jsonServerMain.js --stdio");
 				omniSharpLauch = workingCopy.doSave();
 				registry.registerAssociation(contentTypeManager.getContentType("org.eclipse.wst.jsdt.core.jsonSource"), LaunchConfigurationStreamProvider.findLaunchConfiguration(IExternalToolConstants.ID_PROGRAM_LAUNCH_CONFIGURATION_TYPE, InitializeLaunchConfigurations.VSCODE_JSON_NAME));
 			}
@@ -129,4 +134,38 @@ public void earlyStartup() {
 		}
 	}
 
+	private String getVSCodeLocation() {
+		String res = null;
+		if (Platform.getOS().equals(Platform.OS_LINUX)) {
+			res = "/usr/share/code";
+		} else if (Platform.getOS().equals(Platform.OS_WIN32)) {
+			res = "C:/Program Files (x86)/Microsoft VS Code";
+		} else if (Platform.getOS().equals(Platform.OS_MACOSX)) {
+			res = "/usr/share/code";
+		}
+		if (new File(res).isDirectory()) {
+			return res;
+		}
+		return "/unknown/path/to/VSCode";
+	}
+
+	private String getNodeJsLocation() {
+		String res = "/path/to/node";
+		String[] command = new String[] {"/bin/bash", "-c", "which node"};
+		if (Platform.getOS().equals(Platform.OS_WIN32)) {
+			command = new String[] {"cmd", "/c", "where node"};
+		}
+		BufferedReader reader = null;
+		try {
+			Process p = Runtime.getRuntime().exec(command);
+			reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
+			res = reader.readLine();
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			IOUtils.closeQuietly(reader);
+		}
+		return res;
+	}
+
 }