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Amy de Buitléir
parent
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commit
7e29b45472
15 changed files with 18 additions and 163 deletions
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@ -1,6 +1,6 @@
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= Ad hoc environments with access to...
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= Ad hoc environments
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== A top level package from the Nixpkgs/NixOS repo
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== Access a top level package from the Nixpkgs/NixOS repo
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....
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$# ../../../start-shell nix shell nixpkgs#cowsay <<EOL
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@ -8,7 +8,7 @@ $ cowsay "moo"
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$# EOL
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....
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== A flake
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== Access a flake
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In this example, we will use a flake defined in a remote git repo.
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However, you can use any of the flake reference styles defined in <<#flakeref>>.
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@ -1,60 +0,0 @@
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{
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"nodes": {
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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": 1731533236,
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"narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
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"owner": "numtide",
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"repo": "flake-utils",
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"rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
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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": 1757096966,
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"narHash": "sha256-nJpPWCFbc5/u0VIoSHT350FEwPS5pwiRfyZBbZA3Kgg=",
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"owner": "NixOS",
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"repo": "nixpkgs",
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"rev": "6eb784fb955ab56952e6eeb01f3e64a79933e2b5",
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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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"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-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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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs";
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flake-utils.url = "github:numtide/flake-utils";
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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 = import nixpkgs { inherit system; };
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customGhc = pkgs.haskellPackages.ghcWithPackages (p: with p; [ containers ]);
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in
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{
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devShells = rec {
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default = pkgs.mkShell {
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buildInputs = [ customGhc ];
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};
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};
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}
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);
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}
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= Development shells with access to...
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= Development shells
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include::nixpkg/main-generated.adoc[leveloffset=+1]
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@ -22,14 +22,8 @@ include::devshell/main.adoc[leveloffset=+1]
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include::nix-shell/main-generated.adoc[leveloffset=+1]
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include::remote-git/main.adoc[leveloffset=+1]
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include::haskell-nixpkg/main.adoc[leveloffset=+1]
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include::haskell-local/main.adoc[leveloffset=+1]
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include::haskell-local-deps/main.adoc[leveloffset=+1]
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include::python-nixpkg/main.adoc[leveloffset=+1]
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include::env-var/main.adoc[leveloffset=+1]
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= In a Python script
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[source,python,linenums]
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.Script
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....
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include::my-script.sh[]
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....
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.Output
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....
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$# ./my-script.sh
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....
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from html_sanitizer import Sanitizer
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sanitizer = Sanitizer() # default configuration
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original='<span style="font-weight:bold">some text</span>'
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print('original: ', original)
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sanitized=sanitizer.sanitize(original)
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print('sanitized: ', sanitized)
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= In `shell.nix`
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[source,nix,linenums]
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.shell.nix
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....
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include::shell.nix[]
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....
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Here's a short Python program that uses it.
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[source,python,linenums]
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.Main.hs
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....
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include::Main.py[]
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....
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Here's a demonstration using the program.
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....
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$# echo '$ nix-shell'
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$# nix-shell --run bash <<EOL
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$ python Main.py
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$# EOL
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....
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with (import <nixpkgs> {});
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let
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customPython = python3.withPackages (ps: with ps; [ html_sanitizer ]);
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in
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mkShell {
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buildInputs = [
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customPython
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];
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}
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= Access to a Haskell library package in the nixpkgs repo (without a `.cabal` file)
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= Access a Haskell library package in the nixpkgs repo (without a `.cabal` file)
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Occasionally you might want to run a short Haskell program that depends on a Haskell library,
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but you don't want to bother writing a cabal file.
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Example: Access the `containers` package from the `haskellPackages` set in the nixpkgs repo.
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include::shell/main-generated.adoc[leveloffset=+1]
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include::shebang/main-generated.adoc[leveloffset=+1]
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= In a Haskell script
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[source,haskell,linenums]
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.Script
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....
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= Scripts with access to...
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= Scripts
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You can use `nix shell` to run scripts in arbitrary languages, providing
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the necessary dependencies.
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include::flake/main-generated.adoc[leveloffset=+1]
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include::haskell-nixpkg/main-generated.adoc[leveloffset=+1]
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include::python-nixpkg/main-generated.adoc[leveloffset=+1]
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= Access to a Python library package in the nixpkgs repo (without using a Python builder)
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= Access a Python library package in the nixpkgs repo (without using a Python builder)
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Occasionally you might want to run a short Python program that depends on a Python library,
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but you don't want to bother configuring a builder.
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Example: Access the `html_sanitizer` package from the `python3nnPackages` set in the nixpkgs repo.
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// TODO include::shell/main-generated.adoc[leveloffset=+1]
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include::shebang/main-generated.adoc[leveloffset=+1]
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[source,python,linenums]
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.Script
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....
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include::my-script.sh[]
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....
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.Output
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....
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$# ./my-script.sh
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....
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#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p "[hello cowsay]"
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hello
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cowsay "Pretty cool, huh?"
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#! /usr/bin/env nix
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#! nix shell git+https://codeberg.org/mhwombat/hello-flake --command bash
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hello-flake
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