573/Cargo.toml

## readme.md

      
    Raw
  

              readme.md
            
          
    nix-shell -p wasm-pack cargo rustc -I nixpkgs=channel:nixos-unstable
cargo generate-lockfile
crate2nix generate -n '<nixos-unstable>'
nix-build -I nixpkgs=channel:nixos-unstable
wasm-pack build --target web


[INFO]: Checking for the Wasm target...

Error: wasm32-unknown-unknown target not found in sysroot: "/nix/store/lm64cjp5c5kc772rpmf88q22s8lr2zhi-rustc-1.40.0"
Used rustc from the following path: "/nix/store/lm64cjp5c5kc772rpmf88q22s8lr2zhi-rustc-1.40.0/bin/rustc"

It looks like Rustup is not being used. For non-Rustup setups, the wasm32-unknown-unknown target needs to be installed manually. See   https://rustwasm.github.io/wasm-pack/book/prerequisites/non-rustup-setups.html on how to do this.

Did exactly that:
$(which rustc) --print sysroot


/nix/store/lm64cjp5c5kc772rpmf88q22s8lr2zhi-rustc-1.40.0

ls -lr /nix/store/lm64cjp5c5kc772rpmf88q22s8lr2zhi-rustc-1.40.0/lib/rustlib/wasm32-unknown-unknown/


drwxr-xr-x 1 me me 4096 Dec 16 17:43 lib

wasm-pack build --target web


[INFO]: Checking for the Wasm target...

[INFO]: Compiling to Wasm...

Compiling proc-macro2 v1.0.8

Compiling unicode-xid v0.2.0

Compiling syn v1.0.14

Compiling wasm-bindgen-shared v0.2.58

Compiling log v0.4.8

Compiling cfg-if v0.1.10

Compiling bumpalo v3.2.0

Compiling lazy_static v1.4.0

Compiling wasm-bindgen v0.2.58

error[E0514]: found crate core compiled by an incompatible version of rustc

|

= help: please recompile that crate using this compiler (rustc 1.40.0)

= note: the following crate versions were found:

crate core compiled by rustc 1.40.0 (73528e339 2019-12-16):   /nix/store/lm64cjp5c5kc772rpmf88q22s8lr2zhi-rustc-1.40.0/lib/rustlib/wasm32-unknown-unknown/lib/libcore-ef54709e300503ed.rlib
error: aborting due to previous error
error: could not compile cfg-if.

warning: build failed, waiting for other jobs to finish...

error: build failed

Error: Compiling your crate to WebAssembly failed

Caused by: failed to execute cargo build: exited with exit code: 101


## Cargo.toml
cargo-features = ["edition"]

[package]
edition = "2018"
name = "wasm-pack-examples"
version = "0.1.0"
authors = ["573 <me@gmail.com>"]

[lib]
crate-type = ["cdylib"]

[profile.release]
lto = true

[dependencies]
wasm-bindgen = "0.2"

## default.nix
# or just nix build -f Cargo.nix rootCrate.build
# ./result/bin/${your_crate_name}
{ pkgs ? import <nixpkgs> { config = {}; } }:
let cargo_nix = pkgs.callPackage ./Cargo.nix {};
in cargo_nix.rootCrate.build

## lib.rs
#![allow(non_upper_case_globals)]
# src/lib.rs
use wasm_bindgen::prelude::*;

## makefile
build:
	date
	RUSTFLAGS="-C linker=lld" cargo build --release --target wasm32-unknown-unknown

# TODO make work with watch, maybe builtfarm
clean:
	cargo clean


## pin-unstable.nix
# this allows caching of instability.
# making switches less annoying but also less up to date
import (
    builtins.fetchGit (
    {
        url = "https://github.com/NixOS/nixpkgs";
        ref = "master";
        rev = "b61999e4ad60c351b4da63ae3ff43aae3c0bbdfb";
    }
    ))

## rust-src.nix
{ pkgs, stdenv, rustc }:

stdenv.mkDerivation {
  name = "rust-src";
  src = rustc.src;
  phases = [ "unpackPhase" "installPhase" ];
  installPhase = ''
    mv src $out
    rm -rf $out/{ci,doc,driver,etc,grammar,llvm,rt,rtstartup,rustllvm,test,tools,vendor}
    '';
}

## shell.nix

with import ./pin-unstable.nix { };

stdenv.mkDerivation {
  name = "rust-env";
  RUST_SRC_PATH = import ./rust-src.nix {
    inherit stdenv;
    inherit rustc;
    inherit pkgs;
  };
  RUSTFLAGS="-C linker=lld";
  nativeBuildInputs = [
    (rustc.override {
      stdenv = stdenv.override{
        targetPlatform= {
          parsed = {
            cpu = { name = "wasm32"; };
            vendor = {name = "unknown";};
            kernel = {name = "unknown";};
            abi = {name = "unknown";};
          };
        };
      };
    }) cargo wasm-pack llvmPackages_9.lld
    ##inotify-tools
  ];

  # Set Environment Variables
  RUST_BACKTRACE = 1;
}
	cargo-features = ["edition"]

	[package]
	edition = "2018"
	name = "wasm-pack-examples"
	version = "0.1.0"
	authors = ["573 <me@gmail.com>"]

	[lib]
	crate-type = ["cdylib"]

	[profile.release]
	lto = true

	[dependencies]
	wasm-bindgen = "0.2"
	# or just nix build -f Cargo.nix rootCrate.build
	# ./result/bin/${your_crate_name}
	{ pkgs ? import <nixpkgs> { config = {}; } }:
	let cargo_nix = pkgs.callPackage ./Cargo.nix {};
	in cargo_nix.rootCrate.build
	#![allow(non_upper_case_globals)]
	# src/lib.rs
	use wasm_bindgen::prelude::*;
	build:
	date
	RUSTFLAGS="-C linker=lld" cargo build --release --target wasm32-unknown-unknown

	# TODO make work with watch, maybe builtfarm
	clean:
	cargo clean
	# this allows caching of instability.
	# making switches less annoying but also less up to date
	import (
	builtins.fetchGit (
	{
	url = "https://github.com/NixOS/nixpkgs";
	ref = "master";
	rev = "b61999e4ad60c351b4da63ae3ff43aae3c0bbdfb";
	}
	))
	{ pkgs, stdenv, rustc }:

	stdenv.mkDerivation {
	name = "rust-src";
	src = rustc.src;
	phases = [ "unpackPhase" "installPhase" ];
	installPhase = ''
	mv src $out
	rm -rf $out/{ci,doc,driver,etc,grammar,llvm,rt,rtstartup,rustllvm,test,tools,vendor}
	'';
	}

	with import ./pin-unstable.nix { };

	stdenv.mkDerivation {
	name = "rust-env";
	RUST_SRC_PATH = import ./rust-src.nix {
	inherit stdenv;
	inherit rustc;
	inherit pkgs;
	};
	RUSTFLAGS="-C linker=lld";
	nativeBuildInputs = [
	(rustc.override {
	stdenv = stdenv.override{
	targetPlatform= {
	parsed = {
	cpu = { name = "wasm32"; };
	vendor = {name = "unknown";};
	kernel = {name = "unknown";};
	abi = {name = "unknown";};
	};
	};
	};
	}) cargo wasm-pack llvmPackages_9.lld
	##inotify-tools
	];

	# Set Environment Variables
	RUST_BACKTRACE = 1;
	}