Packaging/Python: Difference between revisions

(5 intermediate revisions by one other user not shown)

Line 24:

inputs = {

nixpkgs.url = "github:NixOS/nixpkgs/nixos-~~unstable~~";

nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";

flake-utils.url = "github:numtide/flake-utils";

};

Line 32:

let

pkgs = import nixpkgs { inherit system; };

~~python = pkgs.python3;~~

# replace ./derivation.nix with the path (relative to this file) to your derivation

# replace ./~~default~~.nix with the path ~~to your derivation,~~ relative to this file

mypackage = pkgs.python3Packages.callPackage ./derivation.nix {

mypackage = pkgs.callPackage ./~~default~~.nix {

~~inherit (python.pkgs) buildPythonPackage package names of dependencies here;~~

lib = pkgs.lib;

};

in {

~~devShells~~.default = pkgs.~~mkShell {~~

packages.default = pkgs.python3.withPackages(_: [ mypackage ]);

~~buildInputs =~~ [ ~~python~~ mypackage ];

};

});

}

</syntaxhighlight>Replace "mypackage" with your package name~~, and "package names of dependencies here" with a (space-separated) list of the dependencies you listed in your buildPythonPackage call~~.

</syntaxhighlight>Replace "mypackage" with your package name. Then, run the flake to get into a python REPL with your package, ready to be imported:<syntaxhighlight lang="shell-session">

$ nix run

~~Next~~, ~~enter~~ the ~~devShell and launch~~ a ~~Python~~ REPL:<syntaxhighlight lang="shell-session">

$ nix ~~develop~~

~~$ python~~

Python 3.11.10 (main, Sep 7 2024, 01:03:31) [GCC 13.2.0] on linux

Type "help", "copyright", "credits" or "license" for more information.

Line 56:

Line 49:

== Pip and Virtualenv enabled nix-shell ==

It might be the case that you simply need to prototype fast small projects with <code>pip</code> and <code>virtualenv</code> without the need for relying on the dependencies being already packaged in nixpkgs.

{{~~Notice~~|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!||

{{Note|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!}}

For a local working python environment you can use the following <code>shell.nix</code><ref>https://groups.google.com/forum/#!topic/nix-devel/3qPfwCAV3GE</ref>.

@@ Line 24: / Line 24: @@
    inputs = {
-     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
      flake-utils.url = "github:numtide/flake-utils";
    };
@@ Line 32: / Line 32: @@
        let
          pkgs = import nixpkgs { inherit system; };
-        python = pkgs.python3;
+         # replace ./derivation.nix with the path (relative to this file) to your derivation
-         # replace ./default.nix with the path to your derivation, relative to this file
+         mypackage = pkgs.python3Packages.callPackage ./derivation.nix {
-         mypackage = pkgs.callPackage ./default.nix {
-          inherit (python.pkgs) buildPythonPackage package names of dependencies here;
            lib = pkgs.lib;
          };
        in {
-         devShells.default = pkgs.mkShell {
+         packages.default = pkgs.python3.withPackages(_: [ mypackage ]);
-          buildInputs = [ python mypackage ];
-        };
        });
 }
-</syntaxhighlight>Replace "mypackage" with your package name, and "package names of dependencies here" with a (space-separated) list of the dependencies you listed in your buildPythonPackage call.
+</syntaxhighlight>Replace "mypackage" with your package name. Then, run the flake to get into a python REPL with your package, ready to be imported:<syntaxhighlight lang="shell-session">
+$ nix run
-Next, enter the devShell and launch a Python REPL:<syntaxhighlight lang="shell-session">
-$ nix develop
-$ python
 Python 3.11.10 (main, Sep  7 2024, 01:03:31) [GCC 13.2.0] on linux
 Type "help", "copyright", "credits" or "license" for more information.
@@ Line 56: / Line 49: @@
 == Pip and Virtualenv enabled nix-shell ==
 It might be the case that you simply need to prototype fast small projects with <code>pip</code> and <code>virtualenv</code> without the need for relying on the dependencies being already packaged in nixpkgs.
-{{Notice|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!||
+{{Note|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!}}
 For a local working python environment you can use the following <code>shell.nix</code><ref>https://groups.google.com/forum/#!topic/nix-devel/3qPfwCAV3GE</ref>.