YunoJuno Nix Developer Environment

.envrc

export OP_ACCOUNT=yunojuno.1password.com

# Create .env.local if it does not exist
if [ ! -f .env.local ]
then
    echo "Creating .env.local"
    cat <<EOF > .env.local
# Place secret env variables from 1Password and custom overrides here
#
# Any variables here will override ones set in .env.native.dist
#
# Use "task get-env-1p" to load 1Pass env variables into this file
#
# Use "task reload-env" to set environment variables after updating

EOF
fi

# Create a .env file by merging .env.local into .env.native.dist
./scripts/merge_env

# Allow unfree packages in nix
export NIXPKGS_ALLOW_UNFREE=1

# Read shell.nix and setup the Nix shell environment.
use nix shell.nix

# Read the .env file and load the environment variables within.
dotenv

shell.nix

# YunoJuno's Dev Environment
# ==========================
#
# We base our developer environment on Nix, the functional package
# manager and its sister package nix-shell which allows for per-
# directory "virtual environments".
#
# We use `nix-shell` alongside `direnv`, so that the environment
# gets loaded as soon as you enter the directory with your shell.
#
# We choose to use the rolling Nix Channel named `nixpgks-unstable`,
# as we stay fairly up-to-date with new versions of Python & NodeJS.
# Read more about Channels here: https://nixos.wiki/wiki/Nix_channels
#
#
# Re-pinning
# ----------
#
# Re-pinning is the act of updating which version of a specific
# channel (tree of packages) we are relying on at a given moment
# in time. If you require the Python & NodeJS versions to bump,
# re-pinning is what you want. The process is simple:
#
# 1. Visit https://status.nixos.org/
# 2. Check the `nixpkgs-unstable`.
# 3. Update the `fetchTarball` URL below with new commit.
# 4. Create a pull request, and mention new Py/JS versions.
#
# If you need to find out which exact version of a package is defined
# at which exact commit in the channel, use https://lazamar.co.uk/nix-versions/

{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/6e2536f1b09863e984f0479ea4b162e4fe86493d.tar.gz") {}
, lib ? pkgs.lib
, stdenv ? pkgs.stdenv
, frameworks ? pkgs.darwin.apple_sdk.frameworks
}:

pkgs.mkShell {

  nativeBuildInputs = [
    
    # For graph tooling
    pkgs.graphviz

    # Dev-env tooling
    pkgs.go-task

    # Python deps
    pkgs.python310
    pkgs.python310Packages.pip
    pkgs.poetry
    pkgs.pre-commit

    # Node deps
    pkgs.nodejs-16_x
    pkgs.yarn

    # for many deps
    pkgs.pkg-config

    # for psycopg2-binary
    pkgs.openssl
    pkgs.postgresql

    # for lxml
    pkgs.libxml2.dev
    pkgs.libxslt.dev

    # for pikepdf
    pkgs.qpdf

    # for node-canvas (build from src)
    pkgs.cairo.dev
    pkgs.pango.dev
    pkgs.libpng.dev
    pkgs.libjpeg.dev
    pkgs.librsvg.dev
    pkgs.giflib

  ] ++ lib.optional stdenv.isDarwin [
    pkgs.xcodebuild
    frameworks.CoreText # for node-canvas
  ];

shellHook = ''
    set -e

    # Force poetry to install locally.
    mkdir -p ./.poetry-venv/
    export POETRY_VIRTUALENVS_PATH=$(pwd)/.poetry-venv/

    echo ""
    echo ""
    echo "__     __                     _                   "
    echo "\ \   / /                    | |                  "
    echo " \ \_/ /   _ _ __   ___      | |_   _ _ __   ___  "
    echo "  \   / | | | '_ \ / _ \ _   | | | | | '_ \ / _ \ "
    echo "   | || |_| | | | | (_) | |__| | |_| | | | | (_) |"
    echo "   |_| \__,_|_| |_|\___/ \____/ \__,_|_| |_|\___/ "
    echo "   =============================================  "
    echo "   ========== Development Environment ==========  "
    echo "   ====== [`python --version`, Node `node --version`] =======  "
    echo ""

    # Show Python update message if the poetry.lock has changed since
    # the last installation completed successfully.
    if ! sha1sum -c poetry.lock.sha1 --status --strict > /dev/null 2>&1
    then
        echo -e "    Python deps: \e[31mNeed update\e[0m, run 'task install-python-env'"
    else
        echo -e "    Python deps: \e[32mUp-to-date\e[0m"
    fi

    # Install Node update message if the yarn.lock has changed since
    # the last installation completed successfully.
    if ! sha1sum -c yarn.lock.sha1 --status --strict > /dev/null 2>&1
    then
        echo -e "    JavaScript deps: \e[31mNeed update\e[0m, run 'task install-js-env'"
    else
        echo -e "    JavaScript deps: \e[32mUp-to-date\e[0m"
    fi

    echo -e "    Run \e[36mtask\e[0m to see available commands            "
  '';

}