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docs(comparisons): compare Copybara and Meta's ShipIt as export tools - #209
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| Check name | Status | Explanation |
|---|---|---|
| Description check |  |
The description directly explains the documented Copybara and Meta ShipIt workflows, including pull-request handling, exported commits, and dependency requirements. |
| Title check | |
The title clearly and concisely identifies the main change: comparing Copybara and Meta’s ShipIt as export tools. |
| Docstring Coverage | |
No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1… |
| Linked Issues check | |
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| Out of Scope Changes check | |
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Full details: Docstring Coverage
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Explanation
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We splice scrut from Meta, and contributing back to it raised how its commits reach GitHub. They follow the workflow the page describes for Copybara: an internal monorepo is the source of truth, a pull request is imported and closed, and an export bot commits the change anew. Meta's traces are public, in every commit message, so the page lists what they show and marks what's inferred: FBShipIt and Sapling behind it. For a contributor that means the change returns as a different commit, and a new Rust dependency also needs one in Meta's third-party folder.
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @test/comparisons/third-party/copybara.md:
- Around line 17-21: Qualify the “Every public commit is an export” and “A pull
request is imported, not merged” statements as describing the ordinary flow, and
document PR #59 as an exception: disable ShipIt, do not import the PR, and merge
it directly on GitHub.
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📒 Files selected for processing: 3
test/comparisons/README.mdtest/comparisons/third-party/README.mdtest/comparisons/third-party/copybara.md
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Re-syncs are merged on GitHub and carry no export trailer, which the "every public commit" wording contradicted; only a contributor's pull request is imported.
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Meta's traces followed XLA's Copybara notes in one stretch of prose, so a reader could take scrut's details for Copybara's, or wonder which tool the closing remark about contributions meant. What both share now opens the page; each tool's evidence sits under its own heading, and the git-splice workflow under a third.
With ShipIt in its own section, "Copybara compared" no longer named the page. Both tools make one repository authoritative and export copies of its commits to the other, which sets them apart from git-subrepo, Josh and git-splice; "export" is also the word Meta's bot and Copybara workflows use for it.
roschaefer
changed the title
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Codex Review: Didn't find any major issues. Swish! Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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1 participant
We splice scrut from Meta, and contributing back to it raised how its
commits reach GitHub. They follow the workflow the page describes for
Copybara: an internal monorepo is the source of truth, a pull request is
imported and closed, and an export bot commits the change anew. Meta's
traces are public, in every commit message, so the page lists what they
show and marks what's inferred: FBShipIt and Sapling behind it.
For a contributor that means the change returns as a different commit,
and a new Rust dependency also needs one in Meta's third-party folder.