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Redowan's Reflections

Redowan's Reflections

Redowan Delowar writes about software engineering, platform work, distributed systems, resilience, and building reliable products.

@rednafi.com0readers227posts4d ago

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Putting this blog on ATProto with standard.site

Mirroring a static Hugo blog onto ATProto with standard.site and Sequoia, plus the GitHub Actions wiring that republishes the records on every push without any manual steps.

If you won't carry the pager, maybe don't push to mainline

Drive-by AI changes break the shared model a team builds around its code, and the ICs end up cleaning up the mess. Why pushing to mainline should come with the pager.

Testing Go CLIs with testscript

How cmd/go's script tests led me to testscript, and how to use it for CLI tests that exercise argv, stdout, stderr, exit codes, and scratch files.

A tour of txtar

txtar is a tiny plain-text archive format Russ Cox introduced in 2018 for multi-file test fixtures. The Go Playground, cmd/go's script tests, gopls's marker tests, and rsc.io/rf all reach for it.

Type-safe slogging

The default slog API is loose enough that a careless line ships broken JSON to production. Pin it down with Attr constructors, LogAttrs, a context-borne logger, and sloglint.

Hoisting wire plumbing out of your Go handlers

Four of the five steps in every unary RPC handler are wire plumbing. Pin the service function signature and they fit in one generic adapter per transport.

Go quirks: function closures capturing mutable references

A Go closure holds a live reference to whatever it captures, not a snapshot. Real examples of where this trips people up, and how to keep it boring.

Accepted proposal: UUID in the Go standard library

Notes on Go's newly accepted uuid proposal and the tradeoffs behind the API.

Peeking into Go struct tags

A quick tour of Go struct tags: how different libraries use them, how you read them at runtime with reflection, and how other tools read them at build time instead.

Error translation in Go services

Translating errors at layer boundaries so storage details don't leak into the handler or, worse, into client responses.

GoError Handling

Dynamo: Amazon's highly available key-value store

Key takeaways from Amazon's 2007 Dynamo paper.

Distributed SystemsDatabases

Stacked log lines considered harmful

Why logging at every layer of a service produces noise, and how to log only at the handler level while propagating context from below.

GoDistributed Systems