Move to modern Yarn with workspaces

Author: utarwyn

.github/workflows/build.yml

@@ -23,11 +23,11 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - name: Install dependencies
-        run: yarn --cwd eslint-plugin install --frozen-lockfile
+        run: yarn install --immutable
       - name: Lint
-        run: yarn --cwd eslint-plugin lint
+        run: yarn lint
       - name: Test
-        run: yarn --cwd eslint-plugin test:cov
+        run: yarn test:cov
 
   sonarcloud:
     name: SonarCloud
@@ -38,9 +38,9 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install dependencies
-        run: yarn --cwd eslint-plugin install --frozen-lockfile
+        run: yarn install --immutable
       - name: Test
-        run: yarn --cwd eslint-plugin test:cov
+        run: yarn test:cov
       - name: SonarCloud Scan
         uses: SonarSource/sonarcloud-github-action@master
         env:

.gitignore

@@ -1,8 +1,19 @@
-!.gitignore
-!.github/**/*.*
-node_modules
+# Editors & OS
+.DS_Store
 .idea
 *.iml
+
+# Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules
+
+# Auto-generated files
 *-report.json
 .nyc_output
 coverage

.yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs

@@ -0,0 +1,7 @@
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs
+    spec: "@yarnpkg/plugin-workspace-tools"
+
+yarnPath: .yarn/releases/yarn-3.4.1.cjs

.yarn/releases/yarn-3.4.1.cjs

@@ -11,7 +11,7 @@ have the basic information before starting.
 - You must have Node.js 14.17.x, 16.x, 18.x or newer installed on your machine
 - You must know how an ESLint plugin works
 - You must know how to create a custom rule in an ESLint plugin
-- You can have Yarn 2.x installed beside npm ([installation guide](https://yarnpkg.com/getting-started/install))
+- You must have modern Yarn 2+ installed ([installation guide](https://yarnpkg.com/getting-started/install))
 
 The ESLint documentation is very detailed and provides a useful starting point.\
 Check more here: https://eslint.org/docs/latest/extend/custom-rules
@@ -22,8 +22,7 @@ But it can be useful to prepare a test project to check the correct execution of
 ## Installation
 
 1. Clone the Git repository
-2. Run `yarn install` or `npm install` inside **eslint-plugin** directory\
-   (depending on the Node.js package manager you use)
+2. Run `yarn install` inside **eslint-plugin** directory
 3. You are good to go! 🚀
 
 ## Create a rule

.yarnrc.yml

@@ -11,7 +11,8 @@
   ],
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/green-code-initiative/ecoCode-linter.git"
+    "url": "git+https://github.com/green-code-initiative/ecoCode-linter.git",
+    "directory": "eslint-plugin"
   },
   "license": "GPL-3.0",
   "author": "Green Code Initiative",