Add mix spec. (#8)
Allows pinning the version of mix used to generate new Elixir projects.pull/9/head
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#!/usr/bin/env bash
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cp -r template/. "$OUT"
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# Generate a new project with the specified name using `mix`. Pipe in `yes`
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# since `mix` requires confirmation when writing out to a directory that already
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# has content.
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nix develop "$OUT" --command bash -c "yes | mix new $OUT --app '$APP'"
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# Replace the template name of the flake.nix file with the new app name. The
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# mix generator would fail if `$APP` does not consist of just lowercase ASCII
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# letters, numbers, or underscores. Thus the following command is safe.
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sed -i "s/<APP_NAME>/$APP/g" "$OUT/flake.nix"
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{
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"app": {
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"type": "text",
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"prompt": "App Name> "
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}
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}
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#!/usr/bin/env bash
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use flake
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# Mix Flake Template
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This is a template for constructing a working environment for Elixir development
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(version 1.15.7, Erlang/OTP 25) with the [mix](https://hexdocs.pm/mix/1.12/Mix.html)
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tool. [direnv](https://direnv.net/) can be used to launch a dev shell upon
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entering this directory (refer to `.envrc`). Otherwise run via:
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```bash
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$> nix develop
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```
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## Language Server
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The [elixir-ls](https://github.com/elixir-lsp/elixir-ls) LSP (version 0.17.10)
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is included in this flake.
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## Dependencies
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This project pins Mix dependencies using [mix2nix](https://github.com/ydlr/mix2nix).
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After updating your `mix.lock` file, make sure to re-run the following:
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```bash
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mix2nix > deps.nix
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```
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As of now, `mix2nix` cannot handle git dependencies found inside the `mix.lock`
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file. If you have git dependencies, add them manually or use
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[FODs](https://nixos.org/manual/nixpkgs/stable/#packaging-beam-applications).
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(import
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(
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let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
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fetchTarball {
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url = lock.nodes.flake-compat.locked.url or "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
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sha256 = lock.nodes.flake-compat.locked.narHash;
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}
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)
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{ src = ./.; }
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).defaultNix
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{ lib, beamPackages, overrides ? (x: y: {}) }:
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let
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buildRebar3 = lib.makeOverridable beamPackages.buildRebar3;
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buildMix = lib.makeOverridable beamPackages.buildMix;
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buildErlangMk = lib.makeOverridable beamPackages.buildErlangMk;
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self = packages // (overrides self packages);
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packages = with beamPackages; with self; {
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};
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in self
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{
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"nodes": {
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"flake-compat": {
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"locked": {
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"lastModified": 1696426674,
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"narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
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"rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
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"revCount": 57,
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"type": "tarball",
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"url": "https://api.flakehub.com/f/pinned/edolstra/flake-compat/1.0.1/018afb31-abd1-7bff-a5e4-cff7e18efb7a/source.tar.gz"
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},
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"original": {
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"type": "tarball",
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"url": "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz"
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}
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},
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"flake-utils": {
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"inputs": {
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"systems": "systems"
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},
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"locked": {
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"lastModified": 1694529238,
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"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
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"owner": "numtide",
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"repo": "flake-utils",
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"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
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"type": "github"
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},
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"original": {
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"owner": "numtide",
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"repo": "flake-utils",
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"type": "github"
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}
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},
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"nixpkgs": {
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"locked": {
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"lastModified": 1700794826,
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"narHash": "sha256-RyJTnTNKhO0yqRpDISk03I/4A67/dp96YRxc86YOPgU=",
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"owner": "NixOS",
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"repo": "nixpkgs",
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"rev": "5a09cb4b393d58f9ed0d9ca1555016a8543c2ac8",
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"type": "github"
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},
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"original": {
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"owner": "NixOS",
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"ref": "nixos-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"root": {
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"inputs": {
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"flake-compat": "flake-compat",
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"flake-utils": "flake-utils",
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"nixpkgs": "nixpkgs"
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}
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},
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"systems": {
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"locked": {
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"lastModified": 1681028828,
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"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
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"owner": "nix-systems",
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"repo": "default",
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"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
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"type": "github"
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},
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"original": {
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"owner": "nix-systems",
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"repo": "default",
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"type": "github"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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{
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description = ''
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An opinionated mix flake.
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To generate a copy of this template elsewhere, run:
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> bootstrap mix
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'';
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inputs = {
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flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
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flake-utils.url = "github:numtide/flake-utils";
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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};
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outputs = { self, nixpkgs, flake-utils, ... }:
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flake-utils.lib.eachDefaultSystem (system:
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let
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pkgs = nixpkgs.legacyPackages.${system};
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inherit (pkgs.beam.packages.erlang_25)
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beamPackages
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buildMix
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elixir
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elixir-ls
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hex
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mixRelease;
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deps = import ./deps.nix {
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lib = pkgs.lib;
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inherit beamPackages;
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};
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in
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{
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packages = {
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lib = buildMix {
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name = "<APP_NAME>";
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src = ./.;
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version = "0.1.0";
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beamDeps = builtins.attrValues deps;
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};
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app = mixRelease {
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pname = "<APP_NAME>";
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src = ./.;
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version = "0.1.0";
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mixNixDeps = deps;
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};
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default = self.packages.${system}.lib;
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};
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devShells.default = pkgs.mkShell {
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inputsFrom = [
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self.packages.${system}.app
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self.packages.${system}.lib
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];
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packages = [
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elixir
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elixir-ls
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hex
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] ++ (with pkgs; [
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mix2nix
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]);
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};
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});
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}
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