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refactor: replace zap with slog #2421

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refactor: replace zap with slog #2421

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danielandersson
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This PR replaces the third-party Zap logging library with Go's standard library slog package for structured logging. This change reduced the number of dependencies while maintaining the same logging functionality and format.

Fixes #2120

Changes

  • Removed dependencies on go.uber.org/zap and go.uber.org/zap/zapcore
  • Added usage of Go's standard library log/slog package
  • Simplified the StdLogger structure by combining infoLog and debugLog into a single stdLog
  • Refactored the StructuredLogger to use slog.Logger instead of Zap's SugaredLogger
  • Modified the NewStructuredLogger function to use slog handlers and configuration
  • Added a new replaceAttr function to maintain compatibility with Google Cloud Logging format
  • Ensured that log messages continue to adhere to the LogEntry format for Google Cloud Logging

@danielandersson danielandersson requested a review from a team as a code owner April 4, 2025 15:07
@jackwotherspoon
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Thanks @danielandersson 👏

I will take a look at this in the coming days 😄

@enocom enocom mentioned this pull request Apr 7, 2025
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Replace zap with log/slog
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@danielandersson @jackwotherspoon @hessjcg