mirror of
https://codeberg.org/mhwombat/nix-book.git
synced 2026-02-22 21:05:23 +08:00
60 lines
1.7 KiB
Text
60 lines
1.7 KiB
Text
= Access a non-flake package (not in nixpkgs)
|
|
|
|
////
|
|
$ mkdir tempwork
|
|
$ cd tempwork
|
|
$ cp ../hello-again ../flake.nix .
|
|
$ git add hello-again flake.nix
|
|
$ nix build
|
|
$ git add flake.lock
|
|
$ git commit -a -m temp
|
|
////
|
|
|
|
In this example, we will use a nix package (not a flake) defined in a remote git repo.
|
|
However, you can use any of the flake reference styles defined in <<#flakeref>>.
|
|
|
|
We already covered how to add a non-flake input to a flake and build it in <<#devshell-nix-non-flake>>;
|
|
here we will focus on making it available at runtime.
|
|
We will write a flake to package a very simple shell script.
|
|
All it does is invoke `hello-nix`, which is the input we added <<#devshell-nix-non-flake,earlier>>.
|
|
|
|
[source,bash,linenums]
|
|
.hello-again
|
|
....
|
|
$# cat hello-again
|
|
....
|
|
|
|
[source,nix,linenums,highlight='5..8,15,34..36,40']
|
|
.flake.nix
|
|
....
|
|
$# cat flake.nix
|
|
....
|
|
|
|
Lines 5-8 and 15 were explained in <<#devshell-nix-non-flake>>.
|
|
As expected, we need to add `helloNix` as a build input, which we do in line 40.
|
|
That does make it available at build and runtime, but it doesn't put it on the path,
|
|
so our `hello-again` script won't be able to find it.
|
|
|
|
There are various ways to deal with this problem.
|
|
In this case we simply edited the script (lines 34-36) as we install it,
|
|
by specifying the full path to `hello-nix`.
|
|
|
|
[NOTE]
|
|
====
|
|
When you're packaging a program written in a more powerful language such as
|
|
Haskell, Python, Java, C, C#, or Rust,
|
|
the language build system will usually do all that is required
|
|
to make the dependencies visible to the program at runtime.
|
|
In that case, adding the dependency to `buildInputs` is sufficient.
|
|
====
|
|
|
|
Here's a demonstration using the flake.
|
|
|
|
....
|
|
$ nix run
|
|
....
|
|
|
|
////
|
|
Good adoc0 scripts clean up after themselves.
|
|
$ cd .. ; rm -rf tempwork # clean up
|
|
////
|