feat: vscode extension setup

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4

.gitignore

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+node_modules/
+dist/
+out/
+.vscode-test/
+*.vsix
+*.log
+.DS_Store

.npmrc

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+enable-pre-post-scripts = true

.vscode-test.mjs

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+import { defineConfig } from "@vscode/test-cli";
+
+export default defineConfig({
+	files: "out/test/**/*.test.js",
+});

.vscodeignore

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+.vscode/**
+.vscode-test/**
+out/**
+node_modules/**
+src/**
+.gitignore
+.yarnrc
+esbuild.js
+vsc-extension-quickstart.md
+**/tsconfig.json
+**/eslint.config.mjs
+**/*.map
+**/*.ts
+**/.vscode-test.*

CHANGELOG.md

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+# Change Log
+
+All notable changes to the "tatr-vsc" extension will be documented in this file.
+
+Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
+
+## [Unreleased]
+
+- Initial release

esbuild.js

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+const esbuild = require("esbuild");
+
+const production = process.argv.includes("--production");
+const watch = process.argv.includes("--watch");
+
+/**
+ * @type {import("esbuild").Plugin}
+ */
+const esbuildProblemMatcherPlugin = {
+	name: "esbuild-problem-matcher",
+
+	setup(build) {
+		build.onStart(() => {
+			console.log("[watch] build started");
+		});
+		build.onEnd((result) => {
+			result.errors.forEach(({ text, location }) => {
+				console.error(`✘ [ERROR] ${text}`);
+				console.error(`    ${location.file}:${location.line}:${location.column}:`);
+			});
+			console.log("[watch] build finished");
+		});
+	},
+};
+
+async function main() {
+	const ctx = await esbuild.context({
+		entryPoints: [
+			"src/extension.ts"
+		],
+		bundle: true,
+		format: "cjs",
+		minify: production,
+		sourcemap: !production,
+		sourcesContent: false,
+		platform: "node",
+		outfile: "dist/extension.js",
+		external: ["vscode"],
+		logLevel: "silent",
+		plugins: [
+			esbuildProblemMatcherPlugin,
+		],
+	});
+	if (watch) {
+		await ctx.watch();
+	} else {
+		await ctx.rebuild();
+		await ctx.dispose();
+	}
+}
+
+main().catch(e => {
+	console.error(e);
+	process.exit(1);
+});

eslint.config.mjs

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+import typescriptEslint from "typescript-eslint";
+
+export default [{
+    files: ["**/*.ts"],
+}, {
+    plugins: {
+        "@typescript-eslint": typescriptEslint.plugin,
+    },
+
+    languageOptions: {
+        parser: typescriptEslint.parser,
+        ecmaVersion: 2022,
+        sourceType: "module",
+    },
+
+    rules: {
+        "@typescript-eslint/naming-convention": ["warn", {
+            selector: "import",
+            format: ["camelCase", "PascalCase"],
+        }],
+
+        curly: "warn",
+        eqeqeq: "warn",
+        "no-throw-literal": "warn",
+        semi: "warn",
+    },
+}];

package.json

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+{
+  "name": "tatr-vsc",
+  "displayName": "tatr-vsc",
+  "description": "VSCode extension for tatr",
+  "version": "0.0.1",
+  "engines": {
+    "vscode": "^1.138.0"
+  },
+  "categories": [
+    "Other"
+  ],
+  "activationEvents": [],
+  "main": "./dist/extension.js",
+  "contributes": {
+    "commands": [
+      {
+        "command": "tatr-vsc.healthCheck",
+        "title": "Tatr Health Check"
+      }
+    ]
+  },
+  "scripts": {
+    "vscode:prepublish": "pnpm run package",
+    "compile": "pnpm run check-types && pnpm run lint && node esbuild.js",
+    "watch": "npm-run-all -p watch:*",
+    "watch:esbuild": "node esbuild.js --watch",
+    "watch:tsc": "tsc --noEmit --watch --project tsconfig.json",
+    "package": "pnpm run check-types && pnpm run lint && node esbuild.js --production",
+    "compile-tests": "tsc -p . --outDir out",
+    "watch-tests": "tsc -p . -w --outDir out",
+    "pretest": "pnpm run compile-tests && pnpm run compile && pnpm run lint",
+    "check-types": "tsc --noEmit",
+    "lint": "eslint src",
+    "test": "vscode-test"
+  },
+  "devDependencies": {
+    "@types/vscode": "^1.138.0",
+    "@types/mocha": "^10.0.10",
+    "@types/node": "24.x",
+    "typescript-eslint": "^8.61.1",
+    "eslint": "^10.5.0",
+    "esbuild": "^0.28.1",
+    "npm-run-all": "^4.1.5",
+    "typescript": "^6.0.3",
+    "@vscode/test-cli": "^0.0.15",
+    "@vscode/test-electron": "^3.0.0"
+  },
+  "overrides": {
+    "diff": "^8.0.4",
+    "serialize-javascript": "^7.0.6"
+  }
+}

pnpm-workspace.yaml

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+allowBuilds:
+  esbuild: set this to true or false

src/extension.ts

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+import * as vscode from "vscode";
+
+export const activate = (context: vscode.ExtensionContext) => {
+	console.log("Extension ready");
+
+	const disposable = vscode.commands.registerCommand("tatr-vsc.healthCheck", () => {
+		vscode.window.showInformationMessage("Ok");
+	});
+
+	context.subscriptions.push(disposable);
+};
+
+export const deactivate = () => {};

src/test/extension.test.ts

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+import * as assert from "assert";
+import * as vscode from "vscode";
+
+suite("Extension Test Suite", () => {
+	vscode.window.showInformationMessage("Start all tests.");
+
+	test("Sample test", () => {
+		assert.strictEqual(-1, [1, 2, 3].indexOf(5));
+		assert.strictEqual(-1, [1, 2, 3].indexOf(0));
+	});
+});

tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "Node16",
+        "target": "ES2022",
+        "lib": [
+            "ES2022"
+        ],
+        "types": [
+            "node",
+            "mocha"
+        ],
+        "sourceMap": true,
+        "rootDir": "src",
+        "strict": true,
+        "noImplicitReturns": true,
+        "noFallthroughCasesInSwitch": true,
+        "noUnusedParameters": true,
+    }
+}