[chore] Replace `yarn` package manager with `pnpm` #7598

ggdouglas · 2025-10-22T01:36:27Z

Summary

This PR migrates the Blueprint monorepo from Yarn v4 to pnpm v10.18.3 as the package manager

Related PRs

To make this large change easier to review, some commits have been split into separate PRs:

Changes in this PR

Core migration changes:

Replace Yarn v4 with pnpm v10.18.3
Add pnpm-workspace.yaml
Remove .yarnrc.yml, yarn.config.cjs, and .yarn/ directory
Update package.json
Delete yarn.lock, add pnpm-lock.yaml
Update .gitignore and .prettierignore for pnpm

CI/CD updates:

Adjust caching strategy for pnpm store
Add no_output_timeout: 20m for lint job to handle CI resource constraints

Documentation updates:

Update documentation to reference pnpm instead of yarn
Update package READMEs and inline documentation

Development environment fixes:

Suppress Sass deprecation warnings in webpack config (legacy JS API and @import warnings)
Fix stylelint-plugin tests to load plugin from local path
Update karma test coverage thresholds for affected components

mm-wang

LGTM, would like someone with some more experience in builds to look at it too, but checked it on some repos and seems like no issues! You can circle back to me for approval if needed.

mm-wang · 2025-10-23T17:17:37Z

.circleci/config.yml

-      - run: yarn constraints
+      - run: pnpm install --frozen-lockfile
+      # TODO: Re-enable constraints check with pnpm equivalent if needed
+      # - run: pnpm constraints


question: Why is this commented out for now? When will we need to run it?

svc-palantir-github · 2025-10-24T16:37:04Z

Add `pnpm-lock.yaml`

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

ggdouglas · 2025-10-24T18:20:34Z

package.json

    },
    "pnpm": {
        "overrides": {
+            "@swc/core": "1.13.20",


Added this to mitigate an issue that seems to be specific to @swc/core@1.13.21

Was encountering local build failures when running pnpm nx dist on docs packages (landing-app, docs-app, and demo-app) with the error: Error: Failed to load native binding. Possibly something to do with @swc/core@1.13.21 having an invalid/corrupted code signature in its native binary for darwin-arm64 (macOS ARM). 1.13.21 was published very recently (10 hours ago as of writing this)

svc-palantir-github · 2025-10-24T18:22:31Z

Override `@swc/core` to `1.13.20` to avoid issue with `1.13.21`

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

svc-palantir-github · 2025-10-24T18:58:09Z

Revert change to `typeRoots` in `tsconfig.base.json`

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

ggdouglas · 2025-10-24T19:02:05Z

packages/webpack-build-scripts/package.json

        "cssnano": "^6.0.3",
        "fork-ts-checker-notifier-webpack-plugin": "^9.0.0",
        "fork-ts-checker-webpack-plugin": "^9.0.2",
+        "istanbul-instrumenter-loader": "^3.0.1",


Referenced here:

blueprint/packages/webpack-build-scripts/webpack.config.karma.mjs

Line 87 in 027add3

loader: fileURLToPath(import.meta.resolve("istanbul-instrumenter-loader")),

ggdouglas · 2025-10-24T19:08:40Z

packages/eslint-plugin/package.json

        "@typescript-eslint/rule-tester": "^8.23.0",
        "dedent": "^1.5.1",
        "mocha": "^10.2.0",
+        "tslib": "~2.6.2",


Fixes an error while running compile on eslint-plugin

✖ nx run @blueprintjs/eslint-plugin:compile > @blueprintjs/eslint-plugin@6.1.16 compile /Volumes/git/blueprint/packages/eslint-plugin > tsc -p src/ src/rules/no-deprecated-components/index.ts:5:1 - error TS2354: This syntax requires an imported helper but module 'tslib' cannot be found. 5 export * from "./no-deprecated-components"; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Found 1 error in src/rules/no-deprecated-components/index.ts:5

blueprint/packages/eslint-plugin/src/rules/no-deprecated-components/index.ts

Line 5 in 027add3

export * from "./no-deprecated-components";

ggdouglas · 2025-10-24T20:40:26Z

scripts/publish-npm-semver-tagged

-# see https://yarnpkg.com/cli/config/set, https://yarnpkg.com/configuration/yarnrc#npmAuthToken
-yarn config set npmAuthToken "${NPM_AUTH_TOKEN}"
+# see https://pnpm.io/cli/config
+pnpm config set //registry.npmjs.org/:_authToken "${NPM_AUTH_TOKEN}"


Not sure if there is an easy way to test/validate these publish scripts prior to merging

ggdouglas · 2025-10-24T21:20:48Z

packages/webpack-build-scripts/webpack.config.base.mjs

            sassOptions: {
                includePaths: sassNodeModulesLoadPaths,
+                // FIXME: https://sass-lang.com/documentation/breaking-changes/
+                silenceDeprecations: ["import", "legacy-js-api"],


Split out into #7606

ggdouglas added no changelog Domain: tooling labels Oct 22, 2025

This was referenced Oct 22, 2025

[chore] Lint and formatting changes #7599

Merged

[chore] Update dependency resolution to be more strict across packages #7600

Merged

mm-wang reviewed Oct 23, 2025

View reviewed changes

Update docs/markdown files to reference pnpm instead of yarn

cc56085

ggdouglas force-pushed the gdouglas/chore-yarn-to-pnpm branch from 2fab7ed to 5a24628 Compare October 24, 2025 15:39

ggdouglas added 6 commits October 24, 2025 12:06

Replace yarn with pnpm

73794b5

chore: lint + formatting changes

6a7a253

Fix pnpm dependency resolution and self-imports

0334dcc

Use local plugin path instead of package name in stylelint-plugin tests

077fd4d

Update line test coverage overrides for certain components

8596c86

Silence Sass deprecations to fix docs/demo-app local dev

f27d99b

ggdouglas force-pushed the gdouglas/chore-yarn-to-pnpm branch from 5a24628 to f27d99b Compare October 24, 2025 16:12

Add pnpm-lock.yaml

60b47ef

Override @swc/core to 1.13.20 to avoid issue with 1.13.21

738f431

ggdouglas commented Oct 24, 2025

View reviewed changes

Revert change to typeRoots in tsconfig.base.json

a62cb12

ggdouglas commented Oct 24, 2025

View reviewed changes

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[chore] Replace `yarn` package manager with `pnpm` #7598

[chore] Replace `yarn` package manager with `pnpm` #7598

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Summary

Related PRs

Changes in this PR

Core migration changes:

CI/CD updates:

Documentation updates:

Development environment fixes:

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svc-palantir-github commented Oct 24, 2025

Add `pnpm-lock.yaml`

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svc-palantir-github commented Oct 24, 2025

Override `@swc/core` to `1.13.20` to avoid issue with `1.13.21`

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svc-palantir-github commented Oct 24, 2025

Revert change to `typeRoots` in `tsconfig.base.json`

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[chore] Replace `yarn` package manager with `pnpm` #7598

[chore] Replace `yarn` package manager with `pnpm` #7598

ggdouglas commented Oct 22, 2025 •

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