hEngine "ninja_gn_binaries.py" not found?

[Keon6]

Not exactly sure where this ninja_gn_binaries.py even comes from and why it's needed but it is failing sue to it.

Describe the bug

Compiling v8 v0.45.0 error: failed to run custom build command for v8 v0.45.0

Caused by: process didn't exit successfully: /Users/<>/hash/engine/target/debug/build/v8-1afa013990c9e136/build-script-build (exit status: 101) --- stdout cargo:rerun-if-changed=.gn cargo:rerun-if-changed=BUILD.gn cargo:rerun-if-changed=src/binding.cc cargo:rerun-if-env-changed=CCACHE cargo:rerun-if-env-changed=CLANG_BASE_PATH cargo:rerun-if-env-changed=DENO_TRYBUILD cargo:rerun-if-env-changed=DOCS_RS cargo:rerun-if-env-changed=GENERATE_COMPDB cargo:rerun-if-env-changed=GN cargo:rerun-if-env-changed=GN_ARGS cargo:rerun-if-env-changed=HOST cargo:rerun-if-env-changed=NINJA cargo:rerun-if-env-changed=OUT_DIR cargo:rerun-if-env-changed=RUSTY_V8_ARCHIVE cargo:rerun-if-env-changed=RUSTY_V8_MIRROR cargo:rerun-if-env-changed=SCCACHE cargo:rerun-if-env-changed=V8_FORCE_DEBUG cargo:rerun-if-env-changed=V8_FROM_SOURCE cargo:rustc-link-lib=static=rusty_v8

--- stderr thread 'main' panicked at 'ninja_gn_binaries.py download failed: Os { code: 2, kind: NotFound, message: "No such file or directory" }', /Users/<>/.cargo/registry/src/github.com-1ecc6299db9ec823/v8-0.45.0/build.rs:274:8 note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

To reproduce

1. Export short-squeeze simulation from hCore
2. Fork hEngine to local IDE
3. Change counter.rs -> counter.js and change dependencies.json to not reflect dependency on counter.rs
4. follow instructions as described in https://github.com/hashintel/hash/tree/main/apps/engine#cli-arguments-and-options under the section "Run a simulation"
5. Run according to instructions in hEngine README.md cargo run --bin cli -- --project /<directory>/short-squeeze/ single-run --num-steps 5

Link to HASH Core

No response

Expected behavior

It's suppsoed to run just fine since it's just a copy of what's already in hCore

Rust compiler

1.65.0-nightly (d394408fb 2022-08-07)

Host

aarch64-apple-darwin

Target

nightly-aarch64-apple-darwin

Version

3.8.10

Additional context

Not using any Python here.

[TimDiekmann]

Hi @Keon6 and apologizes for not responding for a fairly long time.

thread 'main' panicked at 'ninja_gn_binaries.py download failed

Did you retry it? it seems to be a spurious error. The error is emitted here and should probably never fail.