[python] Update error message for custom installCommand builds >250MB by gscho · Pull Request #15946 · vercel/vercel

gscho · 2026-04-14T17:32:19Z

Remove the cryptic 245MB error message for something more concrete when users provide a installCommand. Also make the error message use consistent language.

Signed-off-by: gscho <greg.c.schofield@gmail.com>

changeset-bot · 2026-04-14T17:32:26Z

🦋 Changeset detected

Latest commit: 08d9ae0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@vercel/python	Patch
vercel	Patch

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github-actions · 2026-04-14T17:32:45Z

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vercel · 2026-04-14T17:33:57Z

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vercel · 2026-04-14T17:34:04Z

Low Risk — Error message copy improvements + test coverage additions.

.changeset/lovely-experts-remain.md: added changeset for patch release
dependency-externalizer.ts: updated error message strings for consistency and clarity
dependency-externalizer.test.ts: added tests for custom install command error handling

^{Assessed at 08d9ae0.}

github-actions · 2026-04-14T17:42:08Z

🧪 Unit Test Strategy

Comparing: 7b1db35 → 08d9ae0 (view diff)

Strategy: Affected packages only

✅ Only testing packages that have been modified or depend on modified packages.

Affected packages - 2 (5%)

@vercel/python
vercel

Unaffected packages - 38 (95%)

@vercel-internals/get-package-json
@vercel/backends
@vercel/build-utils
@vercel/cervel
@vercel/cli-auth
@vercel/client
@vercel/config
@vercel/detect-agent
@vercel/edge
@vercel/elysia
@vercel/error-utils
@vercel/express
@vercel/fastify
@vercel/firewall
@vercel/frameworks
@vercel/fs-detectors
@vercel/functions
@vercel/gatsby-plugin-vercel-builder
@vercel/go
@vercel/h3
@vercel/hono
@vercel/hydrogen
@vercel/koa
@vercel/nestjs
@vercel/next
@vercel/node
@vercel/oidc
@vercel/oidc-aws-credentials-provider
@vercel/python-analysis
@vercel/redwood
@vercel/related-projects
@vercel/remix-builder
@vercel/routing-utils
@vercel/ruby
@vercel/rust
@vercel/static-build
@vercel/static-config
examples

Results

Unit tests: Only affected packages will run unit tests
E2E tests: Running in parallel via E2E Tests workflow
Type checks: Only affected packages will run type checks

This comment is automatically generated based on the affected testing strategy

Signed-off-by: gscho <greg.c.schofield@gmail.com>

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated. # Releases ## @vercel/backends@0.0.63 ### Patch Changes - Typecheck deployment TypeScript via the compiler API (entry + import graph), deduplicate the cervel `typescript` module, and extend the turborepo fixture with a chained `tsconfig` for monorepo path resolution. ([#15980](#15980)) - Relax failures when we don't find an entrypoint for backends to maximize backwards compatibility ([#15980](#15980)) - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572)]: - @vercel/build-utils@13.17.1 ## @vercel/build-utils@13.17.1 ### Patch Changes - Align deserialize logic with existing callers. ([#16002](#16002)) ## @vercel/cervel@0.0.50 ### Patch Changes - Updated dependencies \[[`2babfa22946d80a92f1307a8d860a9039d695b09`](2babfa2), [`2babfa22946d80a92f1307a8d860a9039d695b09`](2babfa2)]: - @vercel/backends@0.0.63 ## vercel@51.5.1 ### Patch Changes - Improve Claude Code Vercel plugin install and update prompts across CLI commands. ([#15921](#15921)) - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572), [`2babfa22946d80a92f1307a8d860a9039d695b09`](2babfa2), [`2babfa22946d80a92f1307a8d860a9039d695b09`](2babfa2), [`adbe6f0a0152136aa26aa1277458f4578f62beeb`](adbe6f0)]: - @vercel/build-utils@13.17.1 - @vercel/backends@0.0.63 - @vercel/python@6.33.2 - @vercel/elysia@0.1.66 - @vercel/express@0.1.76 - @vercel/fastify@0.1.69 - @vercel/go@3.5.0 - @vercel/h3@0.1.75 - @vercel/hono@0.2.69 - @vercel/hydrogen@1.3.6 - @vercel/koa@0.1.49 - @vercel/nestjs@0.2.70 - @vercel/next@4.16.8 - @vercel/node@5.7.8 - @vercel/redwood@2.4.12 - @vercel/remix-builder@5.7.2 - @vercel/ruby@2.3.2 - @vercel/rust@1.1.1 - @vercel/static-build@2.9.16 ## @vercel/client@17.3.5 ### Patch Changes - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572)]: - @vercel/build-utils@13.17.1 ## @vercel/elysia@0.1.66 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/express@0.1.76 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 - @vercel/cervel@0.0.50 ## @vercel/fastify@0.1.69 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/fs-detectors@5.18.1 ### Patch Changes - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572)]: - @vercel/build-utils@13.17.1 ## @vercel/gatsby-plugin-vercel-builder@2.1.16 ### Patch Changes - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572)]: - @vercel/build-utils@13.17.1 ## @vercel/h3@0.1.75 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/hono@0.2.69 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/koa@0.1.49 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/nestjs@0.2.70 ### Patch Changes - Updated dependencies \[]: - @vercel/node@5.7.8 ## @vercel/node@5.7.8 ### Patch Changes - Updated dependencies \[[`5219572d21a2ba4b49cc1c27d244c1ff5d76c591`](5219572)]: - @vercel/build-utils@13.17.1 ## @vercel/python@6.33.2 ### Patch Changes - Update the error for custom installCommand builds >250MB. ([#15946](#15946)) ## @vercel/static-build@2.9.16 ### Patch Changes - Updated dependencies \[]: - @vercel/gatsby-plugin-vercel-builder@2.1.16 Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

gscho added 2 commits April 14, 2026 13:31

Update the error for custom installCommand builds >250MB.

63d00b9

Signed-off-by: gscho <greg.c.schofield@gmail.com>

Add changeset.

d0ff36c

Signed-off-by: gscho <greg.c.schofield@gmail.com>

gscho requested review from a team as code owners April 14, 2026 17:32

vercel Bot deployed to Preview – vercel April 14, 2026 17:32 View deployment

gscho changed the title ~~[pythn] Update error message for custom installCommand builds >250MB~~ [python] Update error message for custom installCommand builds >250MB Apr 14, 2026

Merge main.

998bb1d

Signed-off-by: gscho <greg.c.schofield@gmail.com>

vercel Bot deployed to Preview April 15, 2026 20:22 View deployment

scotttrinh reviewed Apr 16, 2026

View reviewed changes

Comment thread packages/python/src/dependency-externalizer.ts

Merge branch 'main' into gscho/PY-209-custom-install-245mb-limit-error

9f8094e

vercel Bot deployed to Preview April 16, 2026 13:58 View deployment

Add back error removed by merge conflict.

9292d46

Signed-off-by: gscho <greg.c.schofield@gmail.com>

gscho requested a review from scotttrinh April 16, 2026 14:09

vercel Bot deployed to Preview April 16, 2026 14:10 View deployment

scotttrinh reviewed Apr 16, 2026

View reviewed changes

Comment thread packages/python/src/dependency-externalizer.ts Outdated

Make error messages consistent.

ce04139

Signed-off-by: gscho <greg.c.schofield@gmail.com>

gscho requested a review from scotttrinh April 16, 2026 14:48

vercel Bot deployed to Preview April 16, 2026 14:49 View deployment

scotttrinh approved these changes Apr 16, 2026

View reviewed changes

vercel Bot reviewed Apr 16, 2026

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Comment thread packages/python/test/dependency-externalizer.test.ts Outdated

Update packages/python/test/dependency-externalizer.test.ts

08d9ae0

Co-authored-by: vercel[bot] <35613825+vercel[bot]@users.noreply.github.com>

vercel Bot deployed to Preview April 16, 2026 14:53 View deployment

gscho enabled auto-merge (squash) April 16, 2026 14:54

gscho merged commit adbe6f0 into main Apr 16, 2026
179 checks passed

gscho deleted the gscho/PY-209-custom-install-245mb-limit-error branch April 16, 2026 15:20

vercel-cli-release-bot mentioned this pull request Apr 16, 2026

Version Packages #16003

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[python] Update error message for custom installCommand builds >250MB#15946

[python] Update error message for custom installCommand builds >250MB#15946
gscho merged 7 commits into
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