Switch to Yarn 4 (Berry) (#35)

.eslintignore

@@ -13,19 +13,31 @@
 !*.mjs
 !*.ts
 
-#########################
-## Shared between linters
-#########################
-
-fixtures
-
 ########################
 ## Same as in .gitignore
 ########################
 
+## Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules
+
+## Misc
 .DS_Store
 *.log
 cache
 coverage
 dist
-node_modules
+
+#########################
+## Shared between linters
+#########################
+
+.git
+.yarn
+fixtures

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
           node-version: 18
 
       - name: Install dependencies
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
 
       - name: Run build
         run: yarn build
@@ -44,22 +44,27 @@ jobs:
           node-version: 18
 
       - name: Install dependencies
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
 
       - name: Lint with eslint
+        if: ${{ success() || failure() }}
         run: yarn lint:eslint
 
       - name: Lint with markdownlint
+        if: ${{ success() || failure() }}
         run: yarn lint:markdownlint
 
       - name: Lint with prettier
+        if: ${{ success() || failure() }}
         run: yarn lint:prettier
 
       - name: Lint with tsc
+        if: ${{ success() || failure() }}
         run: yarn lint:tsc
 
-      - name: Lint with yarn-deduplicate
-        run: yarn lint:yarn-deduplicate
+      - name: Lint with yarn-dedupe
+        if: ${{ success() || failure() }}
+        run: yarn lint:yarn-dedupe
 
   unit-tests:
     name: Unit tests
@@ -90,7 +95,7 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: Install dependencies
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
 
       - name: Run unit tests
         run: yarn test

.gitignore

@@ -1,6 +1,17 @@
+## Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules
+
+## Misc
 .DS_Store
 *.log
 cache
 coverage
 dist
-node_modules
+

.husky/post-checkout

@@ -1,4 +1,4 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-yarn install --prefer-offline --pure-lockfile
+yarn install

.husky/post-commit

@@ -1,4 +1,4 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-yarn install --prefer-offline --pure-lockfile
+yarn install

.husky/post-merge

@@ -1,4 +1,4 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-yarn install --prefer-offline --pure-lockfile
+yarn install

.husky/post-rewrite

@@ -1,4 +1,4 @@
 #!/bin/sh
 . "$(dirname "$0")/_/husky.sh"
 
-yarn install --prefer-offline --pure-lockfile
+yarn install

.markdownlintignore

@@ -9,19 +9,31 @@
 ## Allow certain file types
 !*.md
 
-#########################
-## Shared between linters
-#########################
-
-fixtures
-
 ########################
 ## Same as in .gitignore
 ########################
 
+## Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules
+
+## Misc
 .DS_Store
 *.log
 cache
 coverage
 dist
-node_modules
+
+#########################
+## Shared between linters
+#########################
+
+.git
+.yarn
+fixtures

.prettierignore

@@ -15,19 +15,31 @@
 !*.ts
 !*.yml
 
-#########################
-## Shared between linters
-#########################
-
-fixtures
-
 ########################
 ## Same as in .gitignore
 ########################
 
+## Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+node_modules
+
+## Misc
 .DS_Store
 *.log
 cache
 coverage
 dist
-node_modules
+
+#########################
+## Shared between linters
+#########################
+
+.git
+.yarn
+fixtures

.yarnrc.yml

@@ -0,0 +1,2 @@
+nodeLinker: node-modules
+yarnPath: .yarn/releases/yarn-4.0.0-rc.27.cjs

package.json

@@ -20,13 +20,13 @@
     "fix:eslint": "eslint --fix .",
     "fix:markdownlint": "markdownlint --fix .",
     "fix:prettier": "prettier --write .",
-    "fix:yarn-deduplicate": "yarn install && yarn-deduplicate --strategy=fewer && yarn install",
+    "fix:yarn-dedupe": "yarn dedupe",
     "lint": "npm-run-all --continue-on-error lint:*",
     "lint:markdownlint": "markdownlint .",
     "lint:prettier": "prettier --check .",
     "lint:tsc": "tsc --noEmit",
     "lint:eslint": "eslint --report-unused-disable-directives .",
-    "lint:yarn-deduplicate": "yarn-deduplicate --fail --list --strategy=fewer",
+    "lint:yarn-dedupe": "yarn dedupe --check",
     "prepare": "husky install",
     "prepublishOnly": "yarn lint && yarn test",
     "test": "yarn clean && yarn build && jest"
@@ -62,9 +62,9 @@
     "prettier-plugin-packagejson": "^2.3.0",
     "rimraf": "^3.0.2",
     "sleep-promise": "^9.1.0",
-    "typescript": "^4.8.4",
-    "yarn-deduplicate": "^6.0.0"
+    "typescript": "^4.8.4"
   },
+  "packageManager": "yarn@4.0.0-rc.27",
   "engines": {
     "node": ">=14.16.0"
   }