fix(yaml): preserve unicode chars instead of escaping to \U (#10192) by PhantomPixelDev · Pull Request #10396 · updatecli/updatecli

PhantomPixelDev · 2026-09-10T11:32:22Z

Problem: pkg/plugins/resources/yaml using go.yaml.in/yaml/v3 escapes emoji/non-ASCII beyond U+FFFD to \U0001F308 (YAML 1.1 is_printable limit). Result: name: Run zizmor 🌈 → name: "Run zizmor \U0001F308" causing noisy diffs in GitHub Actions workflows (see also #522).

Root cause: target_yamlpath.go re-serializes via go.yaml.in/yaml/v3 where yaml_emitter_set_unicode(true) still forces double-quoted \U for 4-byte UTF-8. goccy/go-yaml path (target_goyaml.go via yamlFile.String()) preserves literals.

Fix:

Use per-file yaml.Encoder (avoid shared encoder reuse)
Post-process buf.String() with decodeYAMLEscapedUnicode to convert \U0001F308/\uXXXX back to literal UTF-8
Preserves 🔧 🌈 🔍 etc. unchanged

Tests: go test ./pkg/plugins/resources/yaml/... -v — all PASS (0.34s). go vet clean. Single file changed.

Repro:

go run repro.go # before: "Run zizmor \\U0001F308", after: "Run zizmor 🌈"

cc @olblak

Summary by CodeRabbit

Bug Fixes
- YAML Unicode escapes are now decoded only within double-quoted values, while literal escape text in other scalar styles remains unchanged.
- YAML output generation now handles per-file encoding and cleanup more reliably, including when errors occur.

…i#10192)

coderabbitai · 2026-09-10T11:32:30Z

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📒 Files selected for processing (1)

pkg/plugins/resources/yaml/target_yamlpath.go

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pkg/plugins/resources/yaml/target_yamlpath.go

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📝 Walkthrough

Walkthrough

The YAML target now decodes \UXXXXXXXX and \uXXXX escapes only inside double-quoted scalars. It preserves literal escapes in other scalar styles and uses a separate encoder and buffer for each file.

Changes

YAML Unicode preservation

Layer / File(s)	Summary
Context-aware Unicode escape decoder `pkg/plugins/resources/yaml/target_yamlpath.go`	Replaces global regular-expression replacements with a scanner that validates hexadecimal escapes, tracks quote state, and preserves escaped backslashes and non-double-quoted scalar content.
Per-file encoding integration `pkg/plugins/resources/yaml/target_yamlpath.go`	Creates and closes a buffer and encoder for each file, including the encode-error path, then stores decoded encoded content.

Estimated code review effort: 2 (Simple) | ~10 minutes

Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 0aac1

This change preserves extended Unicode characters in YAML output without introducing an identified merge-blocking risk.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: preserving Unicode characters in YAML instead of escaping them.
Description check	✅ Passed	The description explains the problem, root cause, implementation, tests, and reproduction steps. It does not include every template section, but the missing checklist and tradeoff details are non-crit…
Linked Issues check	✅ Passed	The changes address issue [`#10192`] by decoding escaped Unicode sequences within double-quoted YAML scalars and preserving extended Unicode characters as literal UTF-8.
Out of Scope Changes check	✅ Passed	All described changes support the Unicode-preservation objective in [`#10192`]. The encoder lifecycle changes and scanner replacement are directly related implementation changes.

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Inline comments:
In `@pkg/plugins/resources/yaml/target_yamlpath.go`:
- Line 35: Update the yamlUnicodeEscape8 replacement in the target YAML encoding
flow to decode only valid escape tokens within double-quoted scalars, honoring
escaped backslashes; do not rewrite literal \uXXXX or \UXXXXXXXX text in other
scalar styles. Add round-trip coverage for literal Unicode escape values and
preserve existing encoding behavior elsewhere.

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📒 Files selected for processing (1)

pkg/plugins/resources/yaml/target_yamlpath.go

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…pdatecli#10192)

olblak · 2026-09-11T07:33:41Z

I feel a bit uncomfortable with this pullrequest as it changes things that shouldn't.
For example the following yaml file

firstname: john
lastname: alice
comment: |
  line one 🌈
  line two"
data: |
  {"quote": "\u0022", "e": "\u00e9"}
path: 'C:\u0041'

would be modified to:

firstname: john
lastname: alice
comment: "line one 🌈\nline two\"\n"
data: |
  {"quote": """, "e": "é"}
path: 'C:\u0041'

fix(yaml): preserve unicode chars instead of escaping to \U (updatecl…

035d6a3

…i#10192)

PhantomPixelDev marked this pull request as ready for review September 10, 2026 11:35

coderabbitai Bot reviewed Sep 10, 2026

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Comment thread pkg/plugins/resources/yaml/target_yamlpath.go Outdated

fix(yaml): only decode unicode escapes inside double-quoted scalars (u…

0aac157

…pdatecli#10192)

olblak added bug Something isn't working resource-yaml Resource of kind YAML labels Sep 11, 2026

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fix(yaml): preserve unicode chars instead of escaping to \U (#10192) - #10396

fix(yaml): preserve unicode chars instead of escaping to \U (#10192)#10396
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