Development background and final functionality
When you need to maintain some old projects and develop new projects at the same time, switching nvm is very annoying.
Finally, the vscode plug-in is implemented: each vscode instance opens a project, and the version can be automatically switched when switching vscode instances (requires a .nvmrc file in the project root directory)
Plug-in download
vscode plug-in market searchvscode-nvmrc
Design ideas
Create a new file in the project root directory .nvmrc. This is the official file of nvm. nvm useThis file will be automatically searched when used. Windows systems generally use this. nvm-for-windowsIt is a Windows version maintained by another developer and does not support nvm usesearching .nvmrc
. However, this does not It affects the functions implemented in the vscode plug-in nvm use, but it .nvmrcis the official document of nvm.
Not much to say, the code is very simple. The file vscode.window.onDidChangeWindowStateis read in the vscode plug-in method .nvmrc, e.focusedwhich means it is triggered when the vscode window is displayed. It can be triggered when the vscode instance is switched, and then calls the child_process.exec runnvm use
import * as vscode from "vscode";
import {
exec } from "child_process";
import {
readFile } from "fs";
import {
resolve } from "path";
let statusBar: vscode.StatusBarItem | undefined;
let timeout: NodeJS.Timeout;
enum Status {
error = "error",
}
function customStatusBar(text: string, type?: Status, time = 4000) {
if (statusBar) {
statusBar.dispose();
}
if (timeout) {
clearTimeout(timeout);
}
statusBar = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left);
statusBar.color = "#ffffff";
if (type === Status.error) {
statusBar.backgroundColor = new vscode.ThemeColor(
"statusBarItem.errorBackground"
);
}
if (!type) {
statusBar.backgroundColor = new vscode.ThemeColor(
"statusBarItem.warningBackground"
);
}
statusBar.text = "vscode-nvmrc: " + text;
statusBar.show();
timeout = setTimeout(() => {
if (statusBar) {
statusBar.dispose();
}
}, time);
return;
}
function execute(cmd: string) {
exec(cmd, (error, stdout, stderr) => {
if (error) {
customStatusBar(`${
error}`);
} else {
if (stderr) {
customStatusBar(stderr);
} else {
customStatusBar(stdout);
}
}
});
}
function nvmuse(url: string) {
readFile(url, {
encoding: "utf8" }, (err, data) => {
if (err) {
customStatusBar(".nvmrc file not found.");
return;
}
execute("nvm use " + data);
});
}
function resolveRootPathAndNvmuse() {
const workspaceFolders = vscode.workspace.workspaceFolders;
if (workspaceFolders && workspaceFolders.length > 0) {
const rootPath = workspaceFolders[0].uri.fsPath;
if (rootPath) {
const url = resolve(rootPath, ".nvmrc");
nvmuse(url);
}
}
}
export function activate(context: vscode.ExtensionContext) {
resolveRootPathAndNvmuse();
const disposable = vscode.window.onDidChangeWindowState((e) => {
if (e.focused) {
resolveRootPathAndNvmuse();
}
});
context.subscriptions.push(disposable);
}
export function deactivate() {
}