refactor: extract the stack-path naming contract into pkg/stackpath - #2245
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The CloudWatch log group names are a wire contract between this CLI and the Pulumi provider (DefangLabs/pulumi-defang): the provider creates the groups, the CLI subscribes to them by name and picks a parser from the last path segment. Both sides spelled that contract out in literals — "ecs", "builds", "logs" here, and a private copy of StackDir in the provider — so a change on one side fails silently on the other. That is how DefangLabs/pulumi-defang#522 came about: the provider never created the "/ecs" group, the CLI tailed a group nobody wrote to, and `defang compose up` hung. Extract the shape into pkg/stackpath, a stdlib-only leaf package the provider can import without pulling in the rest of the CLI: - StackDir(prefix, project, stack, name) — the "/<prefix>/<project>/<stack>/<name>" path. ByocBaseClient.StackDir now delegates to it and keeps its own prefix/stack state. - LogGroupECS / LogGroupBuilds / LogGroupServices — the well-known segments, replacing the literals at every call site. - IsLogGroup(identifier, name) — the "ends in /<name>" test the subscribe and stream parsers do, which also handles the ARN and "<account>:<name>" forms. No behaviour change; the existing byoc tests cover the call sites and pkg/stackpath adds its own. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01DfUAxBepE1zoX5yeSm28up
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Included review availability: 4 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughThe PR adds shared stack path and CloudWatch log-group contracts. AWS BYOC path construction, stream classification, and subscription event parsing now use the shared constants and matcher. ChangesShared stack path and log-group contracts
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to Shared log-group matching changes event classification behavior. The outstanding concern about bare identifiers bypassing parsers should be conclusively resolved before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 6 files. (1 skipped: 1 unsupported.)
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In `@src/pkg/stackpath/stackpath.go`:
- Line 47: Update IsLogGroup to return true when logGroupIdentifier exactly
equals name before applying the existing slash-prefixed suffix check, preserving
current matching behavior for qualified identifiers. Add a test covering the
bare "ecs" identifier with LogGroupECS.
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src/pkg/cli/client/byoc/aws/byoc.gosrc/pkg/cli/client/byoc/aws/stream.gosrc/pkg/cli/client/byoc/aws/subscribe.gosrc/pkg/cli/client/byoc/baseclient.gosrc/pkg/stackpath/stackpath.gosrc/pkg/stackpath/stackpath_test.go
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…epts The old comment said the identifier "may be a bare log group name", meaning unadorned by an ARN or account prefix. It reads as "the segment alone", which it never is. List the three real shapes instead, say why the leading slash is required, and pin the lone-segment case in the tests. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01DfUAxBepE1zoX5yeSm28up
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@coderabbitai resolve The one finding was answered in this thread and the misleading doc comment that prompted it was rewritten in To restate the decision: |
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…stating it DefangLabs/defang#2245 extracted the stack-path naming contract into pkg/stackpath, a stdlib-only leaf package. Import it and drop the local copies, so the log group the provider creates and the one the CLI tails are the same expression rather than two that happen to agree. - ECSEventsLogGroupSuffix -> stackpath.LogGroupECS - the local StackDir -> stackpath.StackDir; the stackDir helper keeps supplying the prefix and stack from the Pulumi context - TestStackDir dropped: pkg/stackpath tests the shape upstream, and the full-resource test here still pins "/Defang/myproject/beta/ecs" through the real code path Only the leaf compiles into the provider: $ go list -deps ./provider/defangaws/... | grep DefangLabs/defang github.com/DefangLabs/defang/src/pkg/stackpath The dependency runs MIT -> AGPL, the permitted direction; cd/ already depends on defang/src the same way. go mod tidy pulls two indirect bumps (logrus 1.9.3 -> 1.9.4, cast 1.5.0 -> 1.7.1) and drops one. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01DfUAxBepE1zoX5yeSm28up
2 participants
Requested by @lionello in review on pulumi-defang#522: "Let's do your suggestion: leaf package in CLI repo in order to make the dep explicit."
Why
The per-stack CloudWatch log group names are a wire contract between this CLI and the Pulumi provider. The provider creates the groups; the CLI subscribes to them by name and picks a parser from the last path segment. Today both sides spell the contract out in literals —
"ecs","builds","logs"here, plus a private copy ofStackDirin the provider — so a change on one side fails silently on the other.That is exactly how pulumi-defang#522 came about: the provider never created the
/ecsgroup, the CLI tailed a group nobody wrote to, anddefang compose uphung with no error.What
A new stdlib-only leaf package,
src/pkg/stackpath:StackDir(prefix, project, stack, name)ByocBaseClient.StackDir, which now delegates and keeps its own prefix/stack stateLogGroupECS/LogGroupBuilds/LogGroupServices"ecs"/"builds"/"logs"literals at all fiveStackDircall sitesIsLogGroup(identifier, name)strings.HasSuffix(..., "/ecs")tests insubscribe.goandstream.goIt depends on the standard library and nothing else, so the provider can import it without pulling in the rest of the CLI:
Licensing
The dependency runs MIT → AGPL, which is the safe direction: this repo is MIT, pulumi-defang's provider is AGPL-3.0. AGPL-licensed code may import MIT code; the combined work ships under AGPL and MIT's only obligation is preserving the notice. The reverse would be the problem.
pulumi-defang/cd/already depends ondefang/srcthe same way.Behaviour
None changed. This is a pure extraction — the strings produced are byte-identical.
byocandbyoc/awstests cover every touched call site and pass.pkg/stackpathadds its own table-driven tests, including the<account>:<name>live-tail form and the"/notecs"near-miss that a barestrings.Containswould get wrong.go mod tidyclean; darwin and windows cross-builds pass.Follow-up
Once this merges, pulumi-defang#522 drops its private
ECSEventsLogGroupSuffixandStackDirand imports these instead. #522 does not block on it.🤖 Generated with Claude Code
https://claude.ai/code/session_01DfUAxBepE1zoX5yeSm28up
Summary by CodeRabbit
Bug Fixes
Tests