boxofrox

How does one find the sha256 of a new package?

I read that I should put a garbage sha256 into my package file, build it, and nix will report the correct sha256 I should use.

I put sha256 = "01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b" into my package file as the garbage sha256.

When I built the package, the error reports:

boxofrox

Debugging sending audio over TCP from rust forums [1] and gist [2].

[1]: https://users.rust-lang.org/t/data-become-corrupted-through-tcp/35462/3
[2]: https://gist.github.com/solindev/bf4d89b7f8adc2949ba5e300b73cf083/raw/f934cc71c69230bcf6fabf493b9265b88195271a/sender.rs

Simplified the gist to test only the TCP connection with a sequence of numbers.

Setup

1. Create a new project with cargo --bin --name project or some such.

boxofrox

# ~/.bashrc: executed by bash(1) for non-login shells.

# If file exists (likely) copy fragment below into existing script:

# If stdin is a terminal
if [ -t 0 ]; then
	# Set GPG_TTY so gpg-agent knows where to prompt.  See gpg-agent(1)
	export GPG_TTY="$(tty)"
	# Set PINENTRY_USER_DATA so pinentry-auto knows to present a text UI.
	export PINENTRY_USER_DATA=USE_TTY=1

boxofrox

[package]
name = "debug-await-method-chaining"
version = "0.1.0"
authors = ["boxofrox"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
tokio = { version = "0.2", features = [ "full" ] }

boxofrox

result
*.qcow2

boxofrox

$ cargo test
   Compiling csvmap v0.1.0 (file:///home/charetjc/files/development/rust/tinker/csvmap)
    Finished dev [unoptimized + debuginfo] target(s) in 2.34 secs
     Running target/debug/deps/csvmap-cdc7458d4bf17d5e

running 5 tests
test tests::can_parse ... ok
test tests::can_parse_single_quoted_shell_arg ... ok
test tests::can_parse_double_quoted_shell_arg ... ok
test tests::can_parse_any_shell_arg ... FAILED

boxofrox

#[macro_use] extern crate nom;

fn to_s(i: Vec<u8>) -> String {
    String::from_utf8_lossy(&i).into_owned()
}

named!( single_quoted_shell_arg(&[u8]) -> String
      , map!( delimited!( char!('\'')
                        , escaped_transform!( take_until!("\\'")
                                            , "\\"

boxofrox

# Setup rust overlay to gain access to rust nightlies with fix for jobserver error
cd $HOME
git clone https://github.com/mozilla/nixpkgs-mozilla.git
cd nixpkgs-mozilla
./rust-overlay-install.sh

# Install rust nightly (swap nixos with nixpkgs if not on NixOS?)
nix-env -iA nixos.latest.rustChannels.nightly.rust

# Setup environment to link openssl

boxofrox

# Code for buildRustCrate, a Nix function that builds Rust code, just
# like Cargo, but using Nix instead.
#
# This can be useful for deploying packages with NixOps, and to share
# binary dependencies between projects.

{ lib, buildPlatform, stdenv, defaultCrateOverrides, fetchCrate, ncurses, rustc  }:

let buildCrate = { crateName, crateVersion, crateAuthors, buildDependencies,
                   dependencies, completeDeps, completeBuildDeps,

boxofrox

# ~/.config/nixpkgs/overlays/crates-overlay.nix
self: super:

{
  rustHttpBox = super.callPackage ./crates/httpbox.nix { };
}