[core] Change package manager to pnpm

.eslintignore

@@ -30,6 +30,7 @@
 build
 node_modules
 .nyc_output
+pnpm-lock.yaml
 
 # These come from crowdin.
 # If we would commit changes crowdin would immediately try to revert.

.github/workflows/ci.yml

@@ -27,20 +27,22 @@ jobs:
       - run: echo "${{ github.actor }}"
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
-          # fetch all tags which are required for `yarn release:changelog`
+          # fetch all tags which are required for `pnpm release:changelog`
           fetch-depth: 0
+      - name: Set up pnpm
+        uses: pnpm/action-setup@d882d12c64e032187b2edb46d3a0d003b7a43598 # v2.4.0
       - name: Use Node.js 18.x
         uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4.0.1
         with:
           node-version: 18.18 # ts-node throws error on Node.js 18.19 (https://github.com/TypeStrong/ts-node/issues/2094)
-          cache: 'yarn' # https://github.com/actions/setup-node/blob/main/docs/advanced-usage.md#caching-packages-dependencies
-      - run: yarn install
-      - run: yarn release:build
-      - run: yarn release:changelog
+          cache: 'pnpm' # https://github.com/actions/setup-node/blob/main/docs/advanced-usage.md#caching-packages-dependencies
+      - run: pnpm install
+      - run: pnpm release:build
+      - run: pnpm release:changelog
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - run: yarn validate-declarations
-      - name: yarn release:tag
+      - run: pnpm validate-declarations
+      - name: pnpm release:tag
         run: |
           git remote -v
-          yarn release:tag --dryRun
+          pnpm release:tag --dryRun

.gitignore

@@ -22,6 +22,7 @@
 /packages/mui-envinfo/*.tgz
 /packages/mui-icons-material/src/*.js
 /test/bundling/fixtures/*/yarn.lock
+/test/bundling/fixtures/*/pnpm-lock.yaml
 # created by test/bundling/scripts/createFixture
 /test/bundling/fixtures/**/*.fixture.js
 # created by test/bundling/fixtures/gatsby gatsby build

.npmrc

@@ -0,0 +1 @@
+enable-pre-post-scripts = true