vixen

A Rust build engine with correct caching. The CLI is vx.

What it does today

Builds single-crate Rust projects with no dependencies:

vx build           # debug build
vx build --release # release build
vx clean           # remove .vx/ directory

Outputs go to .vx/build/ (not target/).

Caching

vixen uses content-addressed storage and picante (incremental queries) to cache builds correctly:

• Second build with unchanged inputs = instant (zero rustc invocations)
• Change source, edition, or profile = rebuild
• Different checkout path = still a cache hit (--remap-path-prefix)
• Cache persists across sessions

Global cache lives at ~/.vx/ (or $VX_HOME).

Limitations (v0)

vixen explicitly rejects (with clear errors):

• Workspaces
• Dependencies
• Features
• Build scripts (build.rs)
• Proc macros
• Tests / benches / examples
• Multiple binary targets

Debug logging

RUST_LOG=vx_daemon=debug vx build