The build script unconditionally rewrote capabilities/auto-updater.json
on every run, which bumped the file's mtime. tauri-build emits
cargo:rerun-if-changed=capabilities so any touch in that directory
re-runs this script, and 'tauri dev' also watches that folder for
source reloads. The two watchers fed each other: compile → rewrite
(same bytes, fresh mtime) → cargo marks build.rs dirty → recompile
→ tauri dev sees mtime change → request another build → repeat.
Now we read the existing file first and only write when the content
actually differs. mtime stays stable when the generated text is
identical across runs, so neither cargo nor tauri dev observe a
change and the loop terminates.
cc
vicrodh
014af6fbfb