refactor(changeprovider): make the git provider pure logic over a contract - #611
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…tract Move the git transport plumbing — the bare local copy, fetch, commit resolution, merge base, the git command environment — and the Auth contract out of the change provider extension into platform/git/repo, built on platform/git/exec. The provider now depends on a small Repository interface it defines and holds no os/exec and no credential handling: it parses the change URI, picks the stack baseline, reads the diff and author, and shapes the result, nothing more. Auth moves with the copy it configures, resolving the review point that authentication did not belong in the change provider. The wiring's tokenAuth now implements gitrepo.Auth and SetConfig is gitrepo.SetConfig. Repository-plumbing tests move to platform/git/repo; the provider's behavior tests stay and drive a real gitrepo.Repo through the interface.
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## Summary Move the shared git-exec package and its pinned-git test helper under a single platform/git umbrella: platform/gitexec becomes platform/git/exec, and platform/gitexec/gitexectest becomes platform/git/exectest — a sibling rather than nested, so the path no longer doubles "gitexec". Package names are unchanged (gitexec, gitexectest), so this is an import-path move only: no call sites and no behavior change. It is the first step toward housing the change provider's bare-copy repo and auth plumbing alongside the shared git-exec package. ## Test Plan ✅ `bazel build`/`test` of the moved packages and every importer; `make check-gazelle` clean; grep confirms no `platform/gitexec` (old path) imports remain. ## Stack 1. @ uber#609 1. uber#610 1. uber#611 1. uber#612 1. uber#613
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) ## Summary Add Env(EnvOptions) as the single place that builds a git command's environment: the always-applied scrub set, plus transport variables inherited from the parent when set (SSH agent, PATH, TLS, proxy), plus caller-supplied literals appended last so they override. Re-express Command in terms of Env so there is one composer, not two. This gives the change provider's repository and the Runway merger one source of truth to build on instead of each keeping its own copy of the scrub set and transport list. HOME is intentionally excluded from the shared transport list, since callers that isolate HOME and callers that inherit it disagree; each supplies it through Literal or Passthrough. ## Test Plan ✅ new `gitexec` unit tests: scrub set always present, transport vars inherited only when set, literals override, and `HOME` is absent from the shared transport list. Existing `Command` consumers build unchanged. ## Stack 1. uber#609 1. @ uber#610 1. uber#611 1. uber#612 1. uber#613
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…ber#612) ## Summary Replace the merger's inline command environment with gitexec.Env: the isolated HOME/XDG and the pinned runtime paths stay as literals, while the scrub set and the transport variables now come from platform/git/exec, the one source of truth every git caller shares. Delete the merger's own authEnvNames and passthroughEnv. No control-flow change — the merger still owns its working-tree flow and GitRuntime; only how each command's environment is assembled moves to the shared composer. ## Test Plan ✅ full `//runway/extension/merger/git` suite green. Env-plumbing only — no control-flow change to the land path. ## Stack 1. uber#609 1. uber#610 1. uber#611 1. @ uber#612 1. uber#613
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Summary
Move the git transport plumbing — the bare local copy, fetch, commit resolution, merge base, the git command environment — and the Auth contract out of the change provider extension into platform/git/repo, built on platform/git/exec. The provider now depends on a small Repository interface it defines and holds no os/exec and no credential handling: it parses the change URI, picks the stack baseline, reads the diff and author, and shapes the result, nothing more.
Auth moves with the copy it configures, resolving the review point that authentication did not belong in the change provider. The wiring's tokenAuth now implements gitrepo.Auth and SetConfig is gitrepo.SetConfig. Repository-plumbing tests move to platform/git/repo; the provider's behavior tests stay and drive a real gitrepo.Repo through the interface.
Test Plan
✅
//platform/git/...,//submitqueue/extension/changeprovider/git/...,//service/submitqueue/orchestrator/server/...green (incl. the three-step stack-baseline test);provider.goverified free ofos/exec.Stack