.replit

# Replit support (note: currently broken)
#
# # Problem: no support for Nix Flakes
#
# I tried manual nix upgrade with `sh <(curl -L https://nixos.org/nix/install) --no-daemon`, and it works.
# However it is taking a lot of storage, which is scarce. Turns out that by adding `nix` to `replit.nix`
# We can get a newer version for free (from shared `/nix`) cache.
#
# That's kind of the name of the game here - trying to re-use as much as possible from the shared space,
# so it doesn't count as our own storage, since every replit is getting btrfs 
#
# # Problem: low space
#
# With default 500M, we can't do anything (other than editing files). With 1GB (on a hacker plan) it seems
# it might be possible to at least get the `cargo check` working if debug symbols etc. are disabled.
# See `[env]` section below. Once that works, we could get `rust-analyzer` working (which needs `cargo check`
# internally)
#
# # Problem: bindgen
#
# Bindgen doesn't like lack of `nix develop` to set all the env and tooling it needs. After setting:
# `export LIBCLANG_PATH="$(nix-build '<nixpkgs>' --no-build-output -A llvmPackages_11.libclang.lib)/lib"`
# The bindgen compiles, but rocksdb doesn't because it tries to link with the hosts's (Ubuntu 20.04) old glibc
# version. Trying to enforce Nix glibc with `LD_LIBRARY_PATH` leads to problems with compiling C files,
# which seem to be similiar to describe here: https://hoverbear.org/blog/rust-bindgen-in-nix/
#
# It might be possible to get it work, but requires every-increasing complexity.
#
# This was a blocker, so I eventually figured out a better way to support flakes.
#
# # Problem: `nix develop` too large
#
# There's too many depdencies in default shell, so I created a minimal `.#replit` dev shell.
#
# With this `bidgen` works.
run = "nix --extra-experimental-features nix-command --extra-experimental-features flakes develop .#replit -c cargo check"
hidden = ["target"]

[env]
CARGO_PROFILE_DEV_CODEGEN_UNITS="8"
CARGO_PROFILE_DEV_DEBUG="0"
CARGO_PROFILE_DEV_LTO="false"
CARGO_PROFILE_DEV_INCREMENTAL="false"
CARGO_PROFILE_DEV_OPT_LEVEL="s"

[packager]
language = "rust"

[packager.features]
packageSearch = true

[languages.rust]
pattern = "**/*.rs"

[languages.rust.languageServer]
start = "nix --extra-experimental-features nix-command --extra-experimental-features flakes develop .#replit -c rust-analyzer"

[nix]
# this must be kept in sync with `nixpkgs` channel in `flake.nix`
channel = "stable-22_05"

[gitHubImport]
requiredFiles = [".replit", "replit.nix"]