Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Ed Page @epage@hachyderm.io

11/18/2025, 1:55:00 PM

Public

@fasterthanlimeamos We still lock the `build-dir` but this is to unblock work on changing the `build-dir` locking

Ed Page @epage@hachyderm.io

11/18/2025, 5:45:30 PM

Public

@fasterthanlimeamos as a followup, things that are complicated
- lockable units aren't atomic but mixed together with other units across a couple of folders. `-Zbuild-dir-new-layout` exists for changing this but will be a big transition because parts of the ecosystem depend on the layout. `build-dir` itself was a first step to help identify these cases.
- file handle limits makes grabbing locks per unit to be annoying
- with build pipelining (once rmeta is generated, dependents can build in parallel to rlib generation), locking for a build unit isn't just "read XOR write" because we need to do both
- some build units may get mutated by different builds so it can be tricky to track when we can concurrently read or not

We've been discovering and working through these issues in another PR that does change `build-dir` layout, see https://github.com/rust-lang/cargo/pull/16155

Implement fine grain locking for the `target` directory by ranger-ross · Pull Request #16155 · rust-lang/cargo

This PR adds fine grain locking for the build cache using build unit level locking. I'd recommend reading the design details in this description and then reviewing commit by commit. Part of #42...

github.com · GitHub

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