Low-level derivations: Difference between revisions

(One intermediate revision by the same user not shown)

Line 8:

{{File|example.sh|bash|#!/bin/bash

echo "Hello, world!"}}

When running this script (e.g. <code>$ ./example.sh</code>) we'll get exactly the output we want. However, we're trying to build the script using Nix. Our first approach might be to write a simple derivation{{cite manual|nix|language/derivations|5.4.1|Derivations}} similar to:

When running this script (e.g. <code>$ ./example.sh</code>) we'll get exactly the output we want. However, we're trying to build the script using Nix. Our first approach might be to write a simple derivation{{cite manual|nix|language/derivations|number=5.4.1|title=Derivations}} similar to:

{{File|example.nix|nix|<nowiki>derivation {

name = "hello-world";

Line 138:

=== Standard environment ===

For practicality purposes, let's compare this to the standard environment way of doing this. Using <code>stdenv.mkDerivation</code>{{cite manual|nixpkgs|sec-using-stdenv|Using stdenv}} gives us access to the common Linux utilities pre-included for us{{cite manual|nixpkgs|sec-tools-of-stdenv|Tools provided by stdenv}}, so we don't have to do the package importing ourselves:

For practicality purposes, let's compare this to the standard environment way of doing this. Using <code>stdenv.mkDerivation</code>{{cite manual|nixpkgs|sec-using-stdenv|title=Using stdenv}} gives us access to the common Linux utilities pre-included for us{{cite manual|nixpkgs|sec-tools-of-stdenv|title=Tools provided by stdenv}}, so we don't have to do the package importing ourselves:

{{File|example.nix|nix|highlight=3|

Line 158:

=== Nixpkgs utilities ===

Even further up the chain of abstractions, [[Nixpkgs]] contains many pre-built utilities for us that handle some of the configuration involved in the standard environment as well. In our case, we can use the <code>writeShellScript</code>{{cite manual|nixpkgs|trivial-builder-writeShellScript|writeShellScript}}:

Even further up the chain of abstractions, [[Nixpkgs]] contains many pre-built utilities for us that handle some of the configuration involved in the standard environment as well. In our case, we can use the <code>writeShellScript</code>{{cite manual|nixpkgs|trivial-builder-writeShellScript|title=writeShellScript}}:

{{File|example.nix|nix|

@@ Line 8: / Line 8: @@
 {{File|example.sh|bash|#!/bin/bash
 echo "Hello, world!"}}
-When running this script (e.g. <code>$ ./example.sh</code>) we'll get exactly the output we want. However, we're trying to build the script using Nix. Our first approach might be to write a simple derivation{{cite manual|nix|language/derivations|5.4.1|Derivations}} similar to:
+When running this script (e.g. <code>$ ./example.sh</code>) we'll get exactly the output we want. However, we're trying to build the script using Nix. Our first approach might be to write a simple derivation{{cite manual|nix|language/derivations|number=5.4.1|title=Derivations}} similar to:
 {{File|example.nix|nix|<nowiki>derivation {
    name = "hello-world";
@@ Line 138: / Line 138: @@
 === Standard environment ===
-For practicality purposes, let's compare this to the standard environment way of doing this. Using <code>stdenv.mkDerivation</code>{{cite manual|nixpkgs|sec-using-stdenv|Using stdenv}} gives us access to the common Linux utilities pre-included for us{{cite manual|nixpkgs|sec-tools-of-stdenv|Tools provided by stdenv}}, so we don't have to do the package importing ourselves:
+For practicality purposes, let's compare this to the standard environment way of doing this. Using <code>stdenv.mkDerivation</code>{{cite manual|nixpkgs|sec-using-stdenv|title=Using stdenv}} gives us access to the common Linux utilities pre-included for us{{cite manual|nixpkgs|sec-tools-of-stdenv|title=Tools provided by stdenv}}, so we don't have to do the package importing ourselves:
 {{File|example.nix|nix|highlight=3|
@@ Line 158: / Line 158: @@
 === Nixpkgs utilities ===
-Even further up the chain of abstractions, [[Nixpkgs]] contains many pre-built utilities for us that handle some of the configuration involved in the standard environment as well. In our case, we can use the <code>writeShellScript</code>{{cite manual|nixpkgs|trivial-builder-writeShellScript|writeShellScript}}:
+Even further up the chain of abstractions, [[Nixpkgs]] contains many pre-built utilities for us that handle some of the configuration involved in the standard environment as well. In our case, we can use the <code>writeShellScript</code>{{cite manual|nixpkgs|trivial-builder-writeShellScript|title=writeShellScript}}:
 {{File|example.nix|nix|