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yarn: fix lockfile order and bundle Yarn 3.6.2 for offline builds #5

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derasdf wants to merge 1 commit intohermetoproject:yarn-basicfrom
derasdf:yarn-basic
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yarn: fix lockfile order and bundle Yarn 3.6.2 for offline builds #5
derasdf wants to merge 1 commit intohermetoproject:yarn-basicfrom
derasdf:yarn-basic

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@derasdf derasdf commented Mar 23, 2026

Reorder the workspace entry in yarn.lock to match Yarn's expected alphabetical order and bundle the Yarn 3.6.2 binary under .yarn/releases/ so hermetic container builds do not require network access to download it via Corepack.
Not fully sure if this is a full fix but it makes the example yarn test from hermeto work.

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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses issues with Yarn's lockfile order and ensures that container builds can be hermetic by bundling the Yarn binary. The changes aim to resolve problems where the example yarn test from hermeto would fail, and to improve the reliability of builds in environments without network access.

Highlights

  • Yarn Lockfile Order: Reordered the workspace entry in yarn.lock to match Yarn's expected alphabetical order.
  • Bundle Yarn Binary: Bundled the Yarn 3.6.2 binary under .yarn/releases/ for hermetic container builds, avoiding network access via Corepack.
  • Containerfile Update: Modified the Containerfile to source /tmp/hermeto.env before running yarn install.

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Code Review

This pull request updates the Yarn configuration to enable hermetic builds by bundling a specific Yarn version and fixing the lockfile order. The changes in .yarnrc.yml and yarn.lock look good and align with the goal of creating reproducible, offline builds. However, I have a couple of suggestions for the Containerfile to improve its maintainability. Specifically, I recommend adding a comment to clarify the purpose of the sourced /tmp/hermeto.env file and restoring the final newline character, which is a standard convention for text files.

Comment thread Containerfile
WORKDIR /src

RUN yarn install
RUN . /tmp/hermeto.env && yarn install
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medium

This RUN command sources an environment file /tmp/hermeto.env without any context. This makes the Containerfile difficult to understand and maintain as it introduces an implicit dependency. To improve clarity, please add a comment explaining what this file is for and where it comes from.

# Source environment variables from hermeto for the build
RUN . /tmp/hermeto.env && yarn install

Comment thread Containerfile Outdated
Reorder the workspace entry in yarn.lock to match Yarn's expected
alphabetical order and bundle the Yarn 3.6.2 binary under
.yarn/releases/ so hermetic container builds do not require network
access to download it via Corepack.

Signed-off-by: Vladimir Aleksandrov <valeksan@redhat.com>
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