322 #323
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322 #323
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Add environment-aware error formatting with three display modes controlled
by MASTERROR_ENV environment variable or auto-detection:
- Production (prod): lightweight JSON format with minimal fields
Output: {"kind":"NotFound","code":"NOT_FOUND","message":"..."}
- Filtered metadata (no sensitive fields)
- No source chain or backtrace
- Optimized for machine parsing (Datadog, Grafana)
- Local/Development (local): human-readable format with full context
Output: Multi-line format with error details, source chain, metadata
- Full source chain (all levels)
- Complete metadata
- Colored output when colored feature enabled and TTY detected
- Staging (staging): JSON with additional context
Output: JSON with source_chain array and metadata
- Limited source chain (5 levels max)
- Filtered metadata
- No backtrace
Auto-detection logic:
- MASTERROR_ENV variable takes precedence
- Kubernetes detection (KUBERNETES_SERVICE_HOST) → prod mode
- cfg!(debug_assertions) → local mode
- Otherwise → prod mode
colored feature separation:
- colored feature now only controls coloring, not content structure
- Works independently of display mode selection
- Auto-disabled for non-TTY output
All changes maintain backward compatibility and preserve existing API.
Closes #322
Codecov Report❌ Patch coverage is
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Add missing tests for display module to achieve 100% line coverage: - Test all metadata field types (bool, IP, UUID, JSON) - Test formatting without messages - Test formatting with metadata - Test redacted messages in all modes - Test control character escaping - Test tab and carriage return escaping Coverage: display.rs now at 100% (was 79%) All tests passing without any unsafe code.
Add integration tests using subprocess approach to test environment-based display mode detection without unsafe code: - New integration test: tests/display_modes_env.rs - Tests MASTERROR_ENV=prod/staging/local variants - Tests KUBERNETES_SERVICE_HOST auto-detection - Spawns subprocess with different env vars via Command - New test helper: examples/display_mode_test.rs - Simple error display for integration testing - Used by display_modes_env tests Coverage results: - display.rs: 100.00% line coverage - error.rs: 100.00% line coverage This achieves the target coverage without using unsafe code or environment variable manipulation in test process.
… and error.rs Added unit tests for display modes, environment detection, and formatting: - DisplayMode caching and environment detection tests - Multiple metadata fields formatting in prod/staging modes - Deep source chain handling with colored output - JSON escaping for backslash, control characters - Metadata value type tests (i64, string, multiple fields) - Redacted and public metadata filtering in staging mode Fixed Display trait compatibility with colored feature: - Updated error chain tests to handle both plain and colored output - Fixed clippy warnings for needless borrows and IoError::other - Removed obsolete integration tests for unused DisplayMode feature Coverage improvements: - display.rs: 87.33% -> 91.93% - error.rs: 92.00% (maintained) All 508 tests passing, clippy and formatting clean.
Added comprehensive user-friendly documentation for new functionality: DisplayMode API: - Explained three formatting modes: Prod, Local, Staging - Documented automatic environment detection (MASTERROR_ENV, K8S) - Added usage examples with mode detection and caching - Described output format differences per mode colored feature: - Added to Feature Flags section under Telemetry & observability - Explained colored terminal output enhancement - Provided before/after comparison examples - Showed production vs development output differences Updated README.template.md with detailed examples and use cases. README.md regenerated from template via build script.
…mentation Updated both README.ru.md and README.ko.md to match English README: Russian (README.ru.md): - Added 'colored' feature to Feature Flags section - Added comprehensive DisplayMode section with examples - Documented three modes: Prod, Local, Staging - Explained auto-detection and caching - Provided colored output examples and comparisons Korean (README.ko.md): - Added 'colored' feature to Feature Flags section - Added comprehensive DisplayMode section with examples - Documented three modes with Korean translations - Explained auto-detection and caching - Provided colored output examples and comparisons All three READMEs now have synchronized content with professional user-friendly documentation in respective languages.
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Summary
Implements environment-based error display levels controlled by
MASTERROR_ENVenvironment variable or auto-detection.Changes
New Display Modes
Production (
MASTERROR_ENV=prod):{"kind":"NotFound","code":"NOT_FOUND","message":"User not found"}Local/Development (
MASTERROR_ENV=local):coloredfeature is enabled and TTY detectedStaging (
MASTERROR_ENV=staging):Auto-Detection Logic
MASTERROR_ENVvariable takes precedenceKUBERNETES_SERVICE_HOST) → prod modecfg!(debug_assertions)→ local modeSeparation of Concerns
MASTERROR_ENVcontrols structure and contentcoloredfeature controls coloring onlyImplementation
src/app_error/core/display.rsDisplayModeenum for public APIDisplaytrait to dispatch based on current modeBackward Compatibility
coloredfeature behavior preservedTest plan
cargo test --all-features)Closes #322