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Co-authored-by: Brian Merchant <bzm3r@proton.me>
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20
doc/build-helpers/trivial-build-helpers.chapter.md
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@ -1,6 +1,6 @@
# Trivial build helpers {#chap-trivial-builders}
`nixpkgs` provides a variety of wrapper functions that help build very simple derivations. Like [`stdenv.mkDerivation`](#sec-using-stdenv), each of these builders creates and returns a derivation, but the composition of the arguments passed to each are different (usually simpler) than the arguments that must be passed to `stdenv.mkDerivation`.
Nixpkgs provides a variety of wrapper functions that help build commonly useful derivations. Like [`stdenv.mkDerivation`](#sec-using-stdenv), each of these builders creates a derivation, but the arguments passed are different (usually simpler) from those required by `stdenv.mkDerivation`.
## `runCommand` {#trivial-builder-runCommand}
@ -60,9 +60,11 @@ This sets [`allowSubstitutes` to `false`](https://nixos.org/nix/manual/#adv-attr
## `writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin`, `writeShellScript`, `writeShellScriptBin` {#trivial-builder-textwriting}
`nixpkgs` provides a number of functions that produce derivations which write text into the Nix store. These include `writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin`, `writeShellScript`, and `writeShellScriptBin`, each of which is documented below.
Nixpkgs provides the following functions for producing derivations which write text into the Nix store: `writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin`, `writeShellScript`, and `writeShellScriptBin`.
These are useful for creating files from Nix expressions, which may be scripts or non-executable text files, depending on which of the functions is used and the arguments it takes.
`writeText`, `writeTextDir`, `writeScript`, and `writeScriptBin` are convenience functions over `writeTextFile`.
These are useful for creating files from Nix expressions, which may be scripts or non-executable text files.
The result of each of these functions will be a derivation. When you coerce the resulting derivation to text, it will evaluate to the *store path*. Importantly, it will not include the destination subpath produced by the particular function. So, for example, given the following expression:
@ -212,7 +214,7 @@ writeText "my-file"
```
:::
This example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {
@ -250,7 +252,7 @@ writeTextDir "share/my-file"
```
:::
The example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {
@ -293,7 +295,7 @@ writeScript "my-file"
```
:::
The example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {
@ -335,7 +337,7 @@ writeScriptBin "my-script"
```
:::
The example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {
@ -380,7 +382,7 @@ writeShellScript "my-script"
```
:::
The example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {
@ -422,7 +424,7 @@ writeShellScriptBin "my-script"
```
:::
The example is a simpler way to spell:
This example is equivalent to:
```nix
writeTextFile {