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fix(modules-yaml): read manifests with long dependency paths - #13885
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📝 WalkthroughWalkthroughThe Rust and TypeScript ChangesModules-yaml parsing
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The PR changes both manifest readers to prefer JSON while retaining YAML fallback, but TypeScript regressions for duplicate-key handling and YAML depth/resource-limit behavior are still missing, leaving parser parity and fallback guarantees unprotected. Merge should wait for those tests or explicit owner acceptance. Sequence Diagram(s)sequenceDiagram
participant ModulesManifestReader
participant JSONParser
participant YAMLParser
ModulesManifestReader->>JSONParser: Parse manifest text
JSONParser-->>ModulesManifestReader: Return typed manifest or parse failure
ModulesManifestReader->>YAMLParser: Parse text when JSON parsing fails
YAMLParser-->>ModulesManifestReader: Return typed manifest or parse error
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Suggested labels: Suggested reviewers: ✨ Finishing Touches🧪 Generate unit tests (beta)
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Confidence Score: 5/5The PR appears safe to merge. No blocking failure remains. Reviews (5): Last reviewed commit: "test(modules-yaml): pin duplicate JSON k..." | Re-trigger Greptile |
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Inline comments:
In `@pnpm/crates/modules-yaml/src/lib.rs`:
- Around line 455-463: Bound the fallback rewrite in the long-key rewriting
logic by rejecting input that exceeds the parser’s maximum input budget before
scanning or allocating a full replacement buffer. Replace infallible capacity
construction with checked, fallible reservation, and return the original parse
error whenever the budget check or allocation fails; preserve the existing
rewrite behavior for inputs within the limit.
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.changeset/long-modules-yaml-keys.mdpnpm/crates/modules-yaml/src/lib.rspnpm/crates/modules-yaml/tests/index.rs
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
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Integrated-Benchmark Report (Linux)Commit: Regular scenarios report direct and pnpr installs. The peer-heavy resolver scenario compares current Rust, main Rust, and TypeScript pnpm. Bencher consumes pacquet@HEAD and pnpr@HEAD. The tables below show mean ± σ; Bencher thresholds on the minimum latency, which is far less perturbed by shared-runner contention (noise only adds time). Scenario: Isolated linker: fresh restore, cold cache + cold store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 2.3780399738200004,
"stddev": 0.11348473142580075,
"median": 2.35102904862,
"user": 1.24899864,
"system": 1.3559274799999999,
"min": 2.24552635462,
"max": 2.56899146262
},
{
"command": "pacquet@main",
"mean": 2.29273057502,
"stddev": 0.0672629710616751,
"median": 2.27057542912,
"user": 1.2403960399999998,
"system": 1.34538398,
"min": 2.25338406262,
"max": 2.47961823762
},
{
"command": "pnpr@HEAD",
"mean": 1.4593665314200002,
"stddev": 0.12784650951945728,
"median": 1.44047839062,
"user": 1.25697044,
"system": 1.2965676800000001,
"min": 1.31649178862,
"max": 1.68861647062
},
{
"command": "pnpr@main",
"mean": 1.4178902952199999,
"stddev": 0.14146827448126947,
"median": 1.3475835906200002,
"user": 1.2107348399999998,
"system": 1.28831448,
"min": 1.3027627006200002,
"max": 1.6435821226200003
}
]
}Scenario: Isolated linker: fresh restore, hot cache + hot store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.29042844988,
"stddev": 0.010869724896475518,
"median": 0.29217585758000003,
"user": 0.242482,
"system": 0.5167290800000001,
"min": 0.26721365208000003,
"max": 0.30837467808
},
{
"command": "pacquet@main",
"mean": 0.28989159928,
"stddev": 0.005555839065016186,
"median": 0.28888410858,
"user": 0.24367539999999996,
"system": 0.52174148,
"min": 0.28275161508,
"max": 0.30018753308
},
{
"command": "pnpr@HEAD",
"mean": 0.27338752718000003,
"stddev": 0.015466680765328186,
"median": 0.27031467658,
"user": 0.22777039999999998,
"system": 0.48019787999999985,
"min": 0.24745648608,
"max": 0.31001038608000003
},
{
"command": "pnpr@main",
"mean": 0.29171145068,
"stddev": 0.014139042183385707,
"median": 0.29516463958,
"user": 0.2298014,
"system": 0.5029823800000001,
"min": 0.26804658608000004,
"max": 0.30730366708
}
]
}Scenario: Isolated linker: repeat install, hot cache + hot store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.00578396898815534,
"stddev": 0.0007632686317550334,
"median": 0.0055594827600000014,
"user": 0.003279062815533977,
"system": 0.0025763337378640777,
"min": 0.004688490260000001,
"max": 0.009703787260000001
},
{
"command": "pacquet@main",
"mean": 0.008101224886373624,
"stddev": 0.0008265461204125911,
"median": 0.00804005126,
"user": 0.005172847142857139,
"system": 0.002987435164835167,
"min": 0.006571042260000001,
"max": 0.012072218260000002
},
{
"command": "pnpr@HEAD",
"mean": 0.0063872101571291855,
"stddev": 0.000639993750545534,
"median": 0.006330378760000001,
"user": 0.003687192153110046,
"system": 0.0027607263157894747,
"min": 0.005253195260000001,
"max": 0.008610133260000001
},
{
"command": "pnpr@main",
"mean": 0.00799047226,
"stddev": 0.0008507172004483688,
"median": 0.007828851760000002,
"user": 0.00527458013605442,
"system": 0.0027756874149659863,
"min": 0.006668496260000001,
"max": 0.01182702526
}
]
}Scenario: Isolated linker: repeat install, cold cache + hot store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.006264343849400632,
"stddev": 0.0007853057541800756,
"median": 0.006153648780000001,
"user": 0.0035216046056782344,
"system": 0.002796383848580443,
"min": 0.00494916378,
"max": 0.01020233178
},
{
"command": "pacquet@main",
"mean": 0.008186903301897811,
"stddev": 0.00048359710993629216,
"median": 0.00821518928,
"user": 0.005191987299270078,
"system": 0.0030475828467153273,
"min": 0.00710274078,
"max": 0.009936238780000002
},
{
"command": "pnpr@HEAD",
"mean": 0.006207307758593279,
"stddev": 0.0006010105753748137,
"median": 0.00606190478,
"user": 0.003550900489296639,
"system": 0.002711935596330274,
"min": 0.00519242378,
"max": 0.008193338780000002
},
{
"command": "pnpr@main",
"mean": 0.007045059444516126,
"stddev": 0.000463981819402376,
"median": 0.00689749778,
"user": 0.004703792903225807,
"system": 0.002389714,
"min": 0.00633266678,
"max": 0.009395728780000001
}
]
}Scenario: Isolated linker: fresh install, cold cache + cold store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 2.74248553932,
"stddev": 0.08698206037128044,
"median": 2.72507413642,
"user": 1.68168694,
"system": 1.3543520800000002,
"min": 2.67611865292,
"max": 2.9773016229200002
},
{
"command": "pacquet@main",
"mean": 2.72558001552,
"stddev": 0.024818687515238205,
"median": 2.72233101842,
"user": 1.6051288399999997,
"system": 1.33357308,
"min": 2.69198411392,
"max": 2.7554324329199997
},
{
"command": "pnpr@HEAD",
"mean": 1.5075120757199998,
"stddev": 0.11454161001933198,
"median": 1.4578957524199998,
"user": 1.17984994,
"system": 1.3496118799999999,
"min": 1.4095665959199999,
"max": 1.74660689892
},
{
"command": "pnpr@main",
"mean": 1.48636458762,
"stddev": 0.07723485647545099,
"median": 1.4682629459199998,
"user": 1.1580780400000001,
"system": 1.3704248799999998,
"min": 1.40797735792,
"max": 1.6486674149199998
}
]
}Scenario: Isolated linker: fresh install, hot cache + hot store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.38771291172000005,
"stddev": 0.011644209511756735,
"median": 0.38681408572000003,
"user": 0.4222356799999999,
"system": 0.59603186,
"min": 0.37352696222000004,
"max": 0.41273718322
},
{
"command": "pacquet@main",
"mean": 0.38710594282,
"stddev": 0.019871252567262077,
"median": 0.38851549322,
"user": 0.43508347999999997,
"system": 0.60517746,
"min": 0.34094832022000005,
"max": 0.41339395222
},
{
"command": "pnpr@HEAD",
"mean": 0.31308726792,
"stddev": 0.008303069766858802,
"median": 0.31009818122,
"user": 0.19687207999999998,
"system": 0.4704040599999999,
"min": 0.30090223022,
"max": 0.32596045622
},
{
"command": "pnpr@main",
"mean": 0.31665460002,
"stddev": 0.006606878836379578,
"median": 0.31879689222000007,
"user": 0.20330268,
"system": 0.49914816,
"min": 0.30382247322000006,
"max": 0.32847361022000005
}
]
}Scenario: Isolated linker: fresh install, cold cache + hot store
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 1.8331499920000003,
"stddev": 0.015579957767877017,
"median": 1.8307098013,
"user": 0.6808630999999999,
"system": 0.6578873599999999,
"min": 1.8073066053,
"max": 1.8592264103000002
},
{
"command": "pacquet@main",
"mean": 1.826227803,
"stddev": 0.016195442040650956,
"median": 1.8262487448,
"user": 0.6557254999999999,
"system": 0.69513056,
"min": 1.8009632093,
"max": 1.8517569093000001
},
{
"command": "pnpr@HEAD",
"mean": 0.31226389200000004,
"stddev": 0.00941436983084497,
"median": 0.3125691548,
"user": 0.1868875,
"system": 0.49697876,
"min": 0.3020606773,
"max": 0.33095905130000003
},
{
"command": "pnpr@main",
"mean": 0.3168926409,
"stddev": 0.006110450484368371,
"median": 0.31670578830000007,
"user": 0.1991412,
"system": 0.50100696,
"min": 0.3083306833,
"max": 0.32728559630000004
}
]
}Scenario: Isolated linker: fresh resolve, hot cache, offline
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.2049374655066667,
"stddev": 0.014331327032072195,
"median": 0.20421878984000003,
"user": 0.14783921333333333,
"system": 0.052339133333333336,
"min": 0.18332047334,
"max": 0.22824121534
},
{
"command": "pacquet@main",
"mean": 0.20181430476857143,
"stddev": 0.012343174548482591,
"median": 0.20281209884,
"user": 0.15070195142857143,
"system": 0.053231014285714286,
"min": 0.17223744134000002,
"max": 0.21853585234
},
{
"command": "pnpr@HEAD",
"mean": 0.09628925910666669,
"stddev": 0.001904752580163189,
"median": 0.09657811533999999,
"user": 0.028005746666666668,
"system": 0.009983223333333334,
"min": 0.09145614234,
"max": 0.09935613534
},
{
"command": "pnpr@main",
"mean": 0.09636431271931034,
"stddev": 0.0016962912969540628,
"median": 0.09645325534,
"user": 0.027062242068965518,
"system": 0.010889910344827582,
"min": 0.09273396534,
"max": 0.09911725434
}
]
}Scenario: Isolated linker: peer-heavy resolve, hot cache, offline
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.5621501482288889,
"stddev": 0.09299145432396598,
"median": 0.57069722534,
"user": 0.5356941377777777,
"system": 0.10989560888888888,
"min": 0.43439939334000005,
"max": 0.72739212334
},
{
"command": "pacquet@main",
"mean": 0.5056480511177778,
"stddev": 0.07899857777149352,
"median": 0.48827588134000005,
"user": 0.47890302666666656,
"system": 0.09284705333333335,
"min": 0.41162395834000004,
"max": 0.64332830834
},
{
"command": "pnpm@HEAD",
"mean": 2.949934274895556,
"stddev": 0.07894399157777518,
"median": 2.93622075734,
"user": 4.521916693333332,
"system": 0.26254427555555554,
"min": 2.84683019734,
"max": 3.11906177434
}
]
}Scenario: Isolated linker: fresh restore, cold cache + cold store + cold pnpr
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 4.456092352520001,
"stddev": 0.15957445218081648,
"median": 4.47602605012,
"user": 1.31924026,
"system": 1.3989062200000002,
"min": 4.26955281512,
"max": 4.64246242212
},
{
"command": "pacquet@main",
"mean": 4.46822693412,
"stddev": 0.1648613156518128,
"median": 4.44188395862,
"user": 1.3263380599999999,
"system": 1.4216868199999997,
"min": 4.28268418812,
"max": 4.69045918912
},
{
"command": "pnpr@HEAD",
"mean": 3.4351747399200008,
"stddev": 0.08235040368331585,
"median": 3.41538241862,
"user": 1.2359839599999998,
"system": 1.34438922,
"min": 3.35486828112,
"max": 3.60850379012
},
{
"command": "pnpr@main",
"mean": 3.43947655452,
"stddev": 0.07495017195313963,
"median": 3.4382344171200003,
"user": 1.2353187599999997,
"system": 1.40883002,
"min": 3.34647203212,
"max": 3.59961829312
}
]
}Scenario: GVS linker: fresh restore, hot cache + hot storeSame install as the isolated fresh-restore hot/hot scenario, into the shared virtual store — the layout pnpm 12 installs into by default. Comparable to that scenario head-to-head.
BENCHMARK_REPORT.json{
"results": [
{
"command": "pacquet@HEAD",
"mean": 0.16083096586249998,
"stddev": 0.0026672493704354284,
"median": 0.1611383748,
"user": 0.1882928975,
"system": 0.17694496999999998,
"min": 0.15549788280000001,
"max": 0.1647757258
},
{
"command": "pacquet@main",
"mean": 0.16830060356923077,
"stddev": 0.008718027913296109,
"median": 0.1655194008,
"user": 0.20559565230769233,
"system": 0.1839883353846154,
"min": 0.1618664948,
"max": 0.19554344880000002
},
{
"command": "pnpr@HEAD",
"mean": 0.17345196300000004,
"stddev": 0.0027923115329259343,
"median": 0.1730277648,
"user": 0.19311642666666667,
"system": 0.20151105333333336,
"min": 0.1674175038,
"max": 0.1791639978
},
{
"command": "pnpr@main",
"mean": 0.17131952573333334,
"stddev": 0.0025399206780309528,
"median": 0.1714786708,
"user": 0.19752976,
"system": 0.19924612,
"min": 0.1666671968,
"max": 0.17558149480000002
}
]
} |
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Bencher Report
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The new path is entered only after the existing serde_saphyr::from_str call fails, so normal manifests continue to use the unchanged fast path. The broad linker regressions reported by Bencher seem unrelated to this change. Could we rerun the integrated benchmark? |
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1. Rust YAML-depth test unmirrored
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…YAML The manifest is written as JSON in both stacks, so read it with a JSON parser first and keep the YAML parser only as a fallback for manifests written by old pnpm versions. This replaces the explicit-key rewrite workaround for JSON keys longer than YAML's 1,024-character simple-key limit, and applies the same read strategy to the TypeScript CLI. Co-Authored-By: Claude Fable 5 <[email protected]>
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Inline comments:
In `@pnpm11/installing/modules-yaml/test/index.ts`:
- Around line 40-66: Add TypeScript regression coverage alongside the existing
writeModulesManifest/readModulesManifest long dependency path test: load a raw
JSON fixture containing duplicate keys and assert the final value is retained,
and load a deeply nested YAML fixture and assert the expected depth-limit
failure. Reuse the existing manifest reader/test symbols and preserve coverage
for the current long-path case.
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.changeset/long-modules-yaml-keys.mdpnpm/crates/modules-yaml/src/lib.rspnpm/crates/modules-yaml/tests/index.rspnpm11/installing/modules-yaml/src/index.tspnpm11/installing/modules-yaml/test/index.ts
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Summary
Closes #13875.
Both stacks write
.modules.yamlas JSON but read it back through a YAML parser, and the Rust YAML parser rejects object keys longer than YAML's 1,024-character simple-key limit. A sufficiently long dependency path could therefore produce a manifest that the next pnpm command could not read.The readers in both stacks now parse the manifest as JSON first and fall back to the YAML parser only when JSON parsing fails (manifests written in YAML by old pnpm versions). Long dependency paths parse fine on the JSON path, and the YAML fallback keeps its legacy-format support and resource budgets. Duplicate JSON keys now resolve to the last value in both stacks, per standard JSON semantics, instead of being rejected by the YAML parser.
Tests:
cargo nextest run -p pnpm-modules-yamlcargo clippy -p pnpm-modules-yaml --all-targets -- -D warningscargo fmt -p pnpm-modules-yaml -- --checkpnpm --filter @pnpm/installing.modules-yaml testSquash Commit Body
Checklist
pnpm/port, or the description notes what still needs porting.pnpm changeset) if this PR changes any published package. Keep it short and written for pnpm users — it becomes a release note.Written by an agent (Codex, GPT-5.6).
Updated to the JSON-first read strategy by an agent (Claude Code, claude-fable-5).
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@codesmith-botwith what you need. Autofix is disabled.Summary by CodeRabbit
Bug Fixes
.modules.yamlfiles containing long dependency paths.Tests