Under development POC to support deterministic Go runtime. Options:

• TinyGo
  • Too many restrictions
  • Not (yet) obvious how to intercept certain
• Code rewriting/transpiling
  • Feasible (can even do it via toolexec option on go build with import paths changes)
  • A bit difficult because we have to make sure to avoid Go stdlib or Temporal lib itself. Therefore we'd have to replace a lot of public runtime.
  • Lots to replace (e.g. panicking on crypto rand), but again technically doable
• WASM
  • Hard to replace runtime.newproc and map iterations to make deterministic
  • Using Go WASM is targeted for JS and therefore you have to have a harness like this just to work
• Yaegi
  • Seemingly limited ability to change runtime interpretation of
• golang.org/x/tools/go/ssa/interp
  • Most code unexported, so no injection points, but code is small that hopefully hijacking small pieces is safe
  • Currently evaluating in this repository