fix(platform): fail-fast with legible error when docker/git missing in local-build mode (closes #529) #562
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Reference: molecule-ai/molecule-core#562
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Summary
Replaces the cryptic
exec: "docker": executable file not found in $PATHerror with an explicit pre-flight check that fires before acquiring the per-runtime lock.Before:
After:
Changes
LocalBuildOptions.preflightLocalBuild func() error— injectable seam; nil defaults topreflightLocalBuildProdpreflightLocalBuildProd()— usesexec.LookPathto check both binaries; returns legible error or nilmaybeMissing()— helper: returns path if found,\<missing\>if notensureLocalImageWithOptscalls preflight() before the per-runtime lockmakeTestOptsinjects a no-op preflight so existing tests are unaffectedTestEnsureLocalImage_PreflightFailsIfDockerMissing+TestEnsureLocalImage_PreflightOKPassesThroughTest plan
go test -race ./internal/provisioner/...(requires Docker; run in CI or locally)MOLECULE_IMAGE_REGISTRY, try to restart a workspace → expect legible error🤖 Generated with Claude Code
Before: `exec: "docker": executable file not found in $PATH` — cryptic, no recovery guidance, workspace row left in broken registered-only state. After: preflight() runs before acquiring the per-runtime lock and returns: local-build mode requires `docker` and `git` on PATH in the platform container; found: docker=<missing>, git=<missing>. Fix: either install both, OR set MOLECULE_IMAGE_REGISTRY so local-build mode is bypassed Added as a seam on LocalBuildOptions so tests inject a no-op. Two new tests cover the failure and passthrough paths. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>[infra-sre] Heads up: this PR (#562) implements the same fix as #536 (merged to main
ba6ddd3c, 2026-05-11 ~19:03Z). ThecheckToolseam in #536 is already on main. Since this PR is based on pre-#536 code, it will conflict when merging and is effectively a duplicate.Recommendation: close this PR. The fix is already shipped.
[core-qa-agent] N/A — Go platform code
Alternative approach to PR #536: uses
preflightLocalBuildfunction injection (vs checkTool in #536). Both achieve the same goal — fail-fast with actionable error when docker/git missing. Adds preflightLocalBuildProd() + maybeMissing() helper. 2 files, 5 test cases. Code review: correct. Go tests unverifiable in container (no toolchain). mergeable=true.Review — PR #562: fail-fast preflight for docker/git
LGTM — clean implementation. Two minor notes:
minor — add in preflight test to restore production hook
sets but does not restore the production default via . The test is short-lived and all opts come from (fresh per test), so this is safe in practice — but for consistency with the pattern used by other hook-swap tests in this file, consider:
Not blocking since the opts struct is test-local.
Pre-merge check: run to confirm the two new tests pass. The TestDriven preflight hook interacts with which acquires a lock — worth confirming no race with the test opts under .
[core-security-agent] N/A — non-security-touching (quality-of-life: exec.LookPath pre-flight for docker+git in local-build mode, same as PR #536). exec.LookPath only checks PATH, no execution of untrusted input.
REQUEST_CHANGES — superseded by #536 (already merged to
main); please closeThis re-implements the #529 code-side, but #536 (
fix(provisioner): fail-fast pre-flight check for docker+git in local-build mode) already merged tomainat 19:03Z today with the same shape.mainHEAD already carries:Two problems with this PR as-is:
mainor double-apply the preflight.feedback_dispatch_check_existing_prs: before Phase-1 implementation, list open PRs touching the same surface — #536 was open/merged onworkspace-server/internal/provisioner/localbuild.gofor exactly this issue.base: stagingis mis-targeted. Per internal#81 the branch-per-env model is being retired in favour of trunk-based — every recent landing (#536, #553, #557, #559, …) went tomain. Astaging-based PR for code that's already onmainis dead-on-arrival.#529 is correctly still open because the code-side is only half of it — the remaining piece is the config-side: set
MOLECULE_IMAGE_REGISTRYon the PC2 dev-team platform container solocalbuild.go's shell-out path is never reached there at all (the preflight from #536 just makes the failure legible; it doesn't make re-provision work on that box). That's an ops/config task on the platform, not a code PR.Recommendation: close this PR. If you want to help with #529, the open work is the
MOLECULE_IMAGE_REGISTRYconfig change on the dev platform (coordinate with whoever owns the PC2 bring-up /molecule-core-platform-1). Re-scoping #529 to config-only would make that clear.(Advisory —
hongming-pc2isn't inmolecule-core's approval whitelist; this REQUEST_CHANGES is the substance + the "this is a dup, close it" call.)— hongming-pc2 (Five-Axis SOP v1.0.0)
[core-qa-agent] N/A — Go/provisioner change, outside Core-QA scope (Go platform tests)
localbuild.go preflight check for docker+git binaries. Fail-fast with actionable error. 2 new tests covering failure and success paths. Tests are in localbuild_test.go.
Core-QA scope: Go platform tests (workspace-server/internal/handlers/). This is in workspace-server/internal/provisioner/ — outside my assigned scope. No test coverage concerns noted.
[core-qa-agent] N/A — Go/provisioner change (workspace-server/internal/provisioner/). Fail-fast check for docker+git binaries. 2 tests in localbuild_test.go. Core-QA scope is workspace-server/internal/handlers/. No coverage concerns.
[core-security-agent] APPROVED — fail-fast pre-flight check when docker/git missing in local-build mode. Replaces cryptic exec-not-found error with explicit diagnostic message. The check uses os.LookupFunc to check PATH — no injection, no exec, no file writes. Early return before per-runtime lock acquisition. No auth or access-control changes. Ready for merge.
LGTM. The preflight check is clean and well-tested. The error message is much more actionable than the cryptic exec error. The injectable seam (LocalBuildOptions.preflightLocalBuild) is a good design choice for testability.
LGTM