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ci: skip CJS api-extractor checks on PR builds #26596

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dd025bd
ci: skip CJS api-extractor checks on PR builds
frankmueller-msft Mar 2, 2026
fdda446
refactor: use spread pattern to reduce duplication in conditional arrays
frankmueller-msft Mar 3, 2026
9b5395a
style: fix biome formatting for multi-line arrays
frankmueller-msft Mar 3, 2026
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35 changes: 30 additions & 5 deletions fluidBuild.config.cjs
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Expand Up @@ -19,6 +19,8 @@ const releaseGroupPackageJsonGlobs = [
"tools/markdown-magic/package.json",
];

const skipCjsChecks = process.env.SKIP_CJS_CHECKS === "true";
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Copilot AI Mar 1, 2026

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skipCjsChecks is derived via a strict process.env.SKIP_CJS_CHECKS === "true" check. In Azure Pipelines, boolean variables commonly come through as "True"/"False" (capitalized), so PR builds may not actually enable the skip behavior. Consider normalizing (e.g. case-insensitive) and/or accepting "1" to make the gate reliable.

Suggested change
const skipCjsChecks = process.env.SKIP_CJS_CHECKS === "true";
const skipCjsChecks =
typeof process.env.SKIP_CJS_CHECKS === "string" &&
(process.env.SKIP_CJS_CHECKS.toLowerCase() === "true" || process.env.SKIP_CJS_CHECKS === "1");

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@frankmueller-msft frankmueller-msft Mar 3, 2026

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Not an issue — the pipeline variable uses ${{ lower(eq(variables['Build.Reason'], 'PullRequest')) }} in include-vars.yml, which outputs lowercase "true" / "false". The === "true" check matches correctly.


/**
* The settings in this file configure the Fluid build tools, such as fluid-build and flub. Some settings apply to the
* whole repo, while others apply only to the client release group.
Expand Down Expand Up @@ -90,11 +92,17 @@ module.exports = {
// Generic build:test script should be replaced by :esm or :cjs specific versions.
// "tsc" would be nice to eliminate from here, but plenty of packages still focus
// on CommonJS.
"build:test": ["typetests:gen", "tsc", "api-extractor:commonjs", "api-extractor:esnext"],
"build:test:cjs": ["typetests:gen", "tsc", "api-extractor:commonjs"],
"build:test": skipCjsChecks
? ["typetests:gen", "tsc", "api-extractor:esnext"]
: ["typetests:gen", "tsc", "api-extractor:commonjs", "api-extractor:esnext"],
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@CraigMacomber CraigMacomber Mar 3, 2026

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Avoid duplication of the portions which are the same, as it could introduce surprising issues in the future if they diverge.

Suggested change
"build:test": skipCjsChecks
? ["typetests:gen", "tsc", "api-extractor:esnext"]
: ["typetests:gen", "tsc", "api-extractor:commonjs", "api-extractor:esnext"],
"build:test": ["typetests:gen", "tsc", "api-extractor:esnext", ...(skipCjsChecks ? [] : ["api-extractor:commonjs"])]

This same pattern should be applied to the cases below as well.

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@frankmueller-msft frankmueller-msft Mar 3, 2026

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Done — applied the spread pattern to all three conditional arrays (build:test, build:test:cjs, api).

"build:test:cjs": skipCjsChecks
? ["typetests:gen", "tsc"]
: ["typetests:gen", "tsc", "api-extractor:commonjs"],
"build:test:esm": ["typetests:gen", "build:esnext", "api-extractor:esnext"],
"api": {
dependsOn: ["api-extractor:commonjs", "api-extractor:esnext"],
dependsOn: skipCjsChecks
? ["api-extractor:esnext"]
: ["api-extractor:commonjs", "api-extractor:esnext"],
script: false,
},
"api-extractor:commonjs": ["tsc"],
Expand Down Expand Up @@ -126,12 +134,29 @@ module.exports = {
script: true,
},
"depcruise": [],
"check:exports": ["api"],
// When skipping CJS checks, skip check:exports entirely. The package's concurrently
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@CraigMacomber CraigMacomber Mar 3, 2026

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This makes this PR do a lot more disabling that it claims in its description. It seems like you encountered some cases where our build does a poor job with its dependencies and trying to build subsets of what's normally build doesn't work. Its issues like this which is why my previous attempt to speed up our build have failed. I think we really need to correct the dependencies in the build so that its possible to add a minimal build script and just run that without breaking random stuff.

Anyway, I don't think we can consider this PR to be just disabling CJS checks if we disable all checks as a workaround for our build having bad dependencies and being unable to just disable cjs stuff.

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@frankmueller-msft frankmueller-msft Mar 3, 2026

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Fair point. The PR description says "skip CJS api-extractor checks" but the actual scope is broader — check:exports and check:are-the-types-wrong are also fully disabled as a cascade effect, because they can't run without the CJS type rollups that api-extractor produces.

This is a real limitation. The build dependency graph doesn't let us cleanly remove just the CJS api-extractor step without breaking downstream checks that assume its output exists.

I'll update the PR description to accurately reflect the full scope of what's being skipped.

// script would fail because CJS entry points aren't generated, and forcing
// check:exports:bundle-release-tags to run individually surfaces pre-existing
// api-extractor lint errors in packages that have disabled check:exports via
// "echo skip". All export checks are deferred to main CI.
"check:exports": skipCjsChecks
? {
dependsOn: [],
script: false,
}
: ["api"],
Comment on lines +148 to +153
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@jason-ha jason-ha Mar 3, 2026

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This is really not correct. You might be able to alter api some of the time, but I can't think of a time when check:exports should depend on nothing.

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@frankmueller-msft frankmueller-msft Mar 4, 2026

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Agreed — disabling check:exports entirely was a workaround for the build dependency graph not allowing us to cleanly skip just the CJS subtasks. It's too blunt. The better path is separating validation into a parallel job so nothing gets dropped.

"check:exports:bundle-release-tags": ["build:esnext"],
// The package's local 'api-extractor-lint.json' may use the entrypoint from either CJS or ESM,
// therefore we need to require both before running api-extractor.
"check:release-tags": ["tsc", "build:esnext"],
"check:are-the-types-wrong": ["tsc", "build:esnext", "api"],
// attw packs the package and checks CJS+ESM type resolution. With CJS entry
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@CraigMacomber CraigMacomber Mar 3, 2026

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we do not use api-extractor to generate our entry points (we have our own custom tools for that).

If disabling API extractor is breaking attw, then I think you might have disabled more than intended.

Also, if disabling attw is intended, then we should document that in the PR description as that is rather significant.

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@frankmueller-msft frankmueller-msft Mar 3, 2026

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You're right that api-extractor doesn't generate entry points. The issue is that attw packs the package and validates CJS+ESM type resolution. When api-extractor:commonjs is skipped, the CJS .d.ts rollup files that attw expects to find are missing — so it fails. The entry points themselves (generated by custom tools) are still there, but the type rollups that api-extractor produces for CJS are not.

That said, your broader point stands — disabling attw is a significant omission that should be called out in the PR description. I'll update it.

// points missing, it fails. Defer to main CI where api generates both.
"check:are-the-types-wrong": skipCjsChecks
? {
dependsOn: [],
script: false,
}
: ["tsc", "build:esnext", "api"],
"check:format": {
dependencies: [],
script: true,
Expand Down
4 changes: 3 additions & 1 deletion tools/pipelines/build-client.yml
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Expand Up @@ -220,7 +220,9 @@ extends:
- { name: "ci:test:jest", jobName: "JestTest" }
- { name: "ci:test:realsvc:tinylicious", jobName: "RealsvcTinyliciousTest" }
- { name: "ci:test:stress:tinylicious", jobName: "StressTinyliciousTest" }
- { name: "ci:check:are-the-types-wrong", jobName: "AreTheTypesWrong" }
# attw checks CJS+ESM type resolution; skip on PRs where CJS api-extractor is skipped
- ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
- { name: "ci:check:are-the-types-wrong", jobName: "AreTheTypesWrong" }
Comment on lines +224 to +225
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@jason-ha jason-ha Mar 3, 2026

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This should always be checked. You can craft an alternate check for each package that ignores CJS.
But we should gate main on ESM being correct.
We just had a PR today that needs a correction caught by these checks.

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@frankmueller-msft frankmueller-msft Mar 4, 2026

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Fair point — we shouldn't be dropping ESM validation on PRs, especially since it catches real issues. The right approach is CraigMacomber's suggestion: move these checks to a separate parallel validation job rather than disabling them. I'll close this PR in favor of that approach.

coverageTests:
- { name: "ci:test:mocha", jobName: "MochaTest" }
- { name: "ci:test:realsvc:local", jobName: "RealsvcLocalTest" }
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4 changes: 4 additions & 0 deletions tools/pipelines/templates/include-build-lint.yml
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Expand Up @@ -31,6 +31,9 @@ steps:
# a transitive dependency of browserslist. Without this, the warning fires once
# per package during builds, producing 100+ identical warnings in build logs.
BASELINE_BROWSER_MAPPING_IGNORE_OLD_DATA: 1
# Skip CJS api-extractor checks on PR builds to reduce build time.
# CJS output is byte-for-byte identical to ESM; full CJS checks run on main/release CI.
SKIP_CJS_CHECKS: $(skipCjsChecks)
inputs:
command: 'custom'
workingDir: $(Pipeline.Workspace)/${{ parameters.buildDirectory }}
Expand All @@ -42,6 +45,7 @@ steps:
env:
# Suppress baseline-browser-mapping staleness warnings during lint as well.
BASELINE_BROWSER_MAPPING_IGNORE_OLD_DATA: 1
SKIP_CJS_CHECKS: $(skipCjsChecks)
inputs:
command: 'custom'
workingDir: $(Pipeline.Workspace)/${{ parameters.buildDirectory }}
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4 changes: 4 additions & 0 deletions tools/pipelines/templates/include-vars.yml
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Expand Up @@ -122,6 +122,10 @@ variables:
value: ${{ ne(variables['Build.Reason'], 'PullRequest') }}
readonly: true

- name: skipCjsChecks
value: ${{ lower(eq(variables['Build.Reason'], 'PullRequest')) }}
readonly: true

- template: /tools/pipelines/templates/include-vars-telemetry-generator.yml@self

# The way 1ES pipeline templates determine the default branch of a repository only works for repos hosted in ADO.
Expand Down
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