doc: migrate lib.customisation to use doc-comments
This commit is contained in:
Johannes Kirschbauer
parent
284dd64382
commit
3dfd61965e
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@ -15,42 +15,64 @@ in
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rec {
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/* `overrideDerivation drv f` takes a derivation (i.e., the result
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of a call to the builtin function `derivation`) and returns a new
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derivation in which the attributes of the original are overridden
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according to the function `f`. The function `f` is called with
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the original derivation attributes.
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/**
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`overrideDerivation drv f` takes a derivation (i.e., the result
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of a call to the builtin function `derivation`) and returns a new
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derivation in which the attributes of the original are overridden
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according to the function `f`. The function `f` is called with
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the original derivation attributes.
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`overrideDerivation` allows certain "ad-hoc" customisation
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scenarios (e.g. in ~/.config/nixpkgs/config.nix). For instance,
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if you want to "patch" the derivation returned by a package
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function in Nixpkgs to build another version than what the
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function itself provides.
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`overrideDerivation` allows certain "ad-hoc" customisation
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scenarios (e.g. in ~/.config/nixpkgs/config.nix). For instance,
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if you want to "patch" the derivation returned by a package
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function in Nixpkgs to build another version than what the
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function itself provides.
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For another application, see build-support/vm, where this
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function is used to build arbitrary derivations inside a QEMU
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virtual machine.
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For another application, see build-support/vm, where this
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function is used to build arbitrary derivations inside a QEMU
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virtual machine.
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Note that in order to preserve evaluation errors, the new derivation's
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outPath depends on the old one's, which means that this function cannot
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be used in circular situations when the old derivation also depends on the
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new one.
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Note that in order to preserve evaluation errors, the new derivation's
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outPath depends on the old one's, which means that this function cannot
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be used in circular situations when the old derivation also depends on the
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new one.
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You should in general prefer `drv.overrideAttrs` over this function;
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see the nixpkgs manual for more information on overriding.
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You should in general prefer `drv.overrideAttrs` over this function;
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see the nixpkgs manual for more information on overriding.
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Example:
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mySed = overrideDerivation pkgs.gnused (oldAttrs: {
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name = "sed-4.2.2-pre";
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src = fetchurl {
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url = ftp://alpha.gnu.org/gnu/sed/sed-4.2.2-pre.tar.bz2;
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hash = "sha256-MxBJRcM2rYzQYwJ5XKxhXTQByvSg5jZc5cSHEZoB2IY=";
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};
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patches = [];
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});
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Type:
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overrideDerivation :: Derivation -> ( Derivation -> AttrSet ) -> Derivation
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# Inputs
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`drv`
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: 1\. Function argument
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`f`
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: 2\. Function argument
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# Type
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```
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overrideDerivation :: Derivation -> ( Derivation -> AttrSet ) -> Derivation
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```
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# Examples
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:::{.example}
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## `lib.customisation.overrideDerivation` usage example
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```nix
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mySed = overrideDerivation pkgs.gnused (oldAttrs: {
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name = "sed-4.2.2-pre";
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src = fetchurl {
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url = ftp://alpha.gnu.org/gnu/sed/sed-4.2.2-pre.tar.bz2;
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hash = "sha256-MxBJRcM2rYzQYwJ5XKxhXTQByvSg5jZc5cSHEZoB2IY=";
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};
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patches = [];
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});
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```
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:::
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*/
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overrideDerivation = drv: f:
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let
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@ -67,26 +89,44 @@ rec {
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});
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/* `makeOverridable` takes a function from attribute set to attribute set and
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injects `override` attribute which can be used to override arguments of
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the function.
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/**
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`makeOverridable` takes a function from attribute set to attribute set and
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injects `override` attribute which can be used to override arguments of
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the function.
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Please refer to documentation on [`<pkg>.overrideDerivation`](#sec-pkg-overrideDerivation) to learn about `overrideDerivation` and caveats
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related to its use.
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Please refer to documentation on [`<pkg>.overrideDerivation`](#sec-pkg-overrideDerivation) to learn about `overrideDerivation` and caveats
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related to its use.
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Example:
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nix-repl> x = {a, b}: { result = a + b; }
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nix-repl> y = lib.makeOverridable x { a = 1; b = 2; }
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# Inputs
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nix-repl> y
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{ override = «lambda»; overrideDerivation = «lambda»; result = 3; }
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`f`
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nix-repl> y.override { a = 10; }
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{ override = «lambda»; overrideDerivation = «lambda»; result = 12; }
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: 1\. Function argument
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Type:
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makeOverridable :: (AttrSet -> a) -> AttrSet -> a
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# Type
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```
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makeOverridable :: (AttrSet -> a) -> AttrSet -> a
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```
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# Examples
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:::{.example}
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## `lib.customisation.makeOverridable` usage example
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```nix
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nix-repl> x = {a, b}: { result = a + b; }
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nix-repl> y = lib.makeOverridable x { a = 1; b = 2; }
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nix-repl> y
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{ override = «lambda»; overrideDerivation = «lambda»; result = 3; }
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nix-repl> y.override { a = 10; }
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{ override = «lambda»; overrideDerivation = «lambda»; result = 12; }
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```
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:::
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*/
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makeOverridable = f:
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let
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@ -120,7 +160,8 @@ rec {
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else result);
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/* Call the package function in the file `fn` with the required
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/**
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Call the package function in the file `fn` with the required
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arguments automatically. The function is called with the
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arguments `args`, but any missing arguments are obtained from
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`autoArgs`. This function is intended to be partially
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@ -147,8 +188,26 @@ rec {
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<!-- TODO: Apply "Example:" tag to the examples above -->
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Type:
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callPackageWith :: AttrSet -> ((AttrSet -> a) | Path) -> AttrSet -> a
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# Inputs
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`autoArgs`
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: 1\. Function argument
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`fn`
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: 2\. Function argument
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`args`
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: 3\. Function argument
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# Type
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```
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callPackageWith :: AttrSet -> ((AttrSet -> a) | Path) -> AttrSet -> a
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```
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*/
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callPackageWith = autoArgs: fn: args:
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let
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@ -210,12 +269,31 @@ rec {
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else abort "lib.customisation.callPackageWith: ${error}";
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/* Like callPackage, but for a function that returns an attribute
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set of derivations. The override function is added to the
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individual attributes.
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/**
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Like callPackage, but for a function that returns an attribute
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set of derivations. The override function is added to the
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individual attributes.
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Type:
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callPackagesWith :: AttrSet -> ((AttrSet -> AttrSet) | Path) -> AttrSet -> AttrSet
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# Inputs
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`autoArgs`
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: 1\. Function argument
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`fn`
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: 2\. Function argument
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`args`
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: 3\. Function argument
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# Type
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```
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callPackagesWith :: AttrSet -> ((AttrSet -> AttrSet) | Path) -> AttrSet -> AttrSet
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```
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*/
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callPackagesWith = autoArgs: fn: args:
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let
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@ -233,11 +311,30 @@ rec {
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else mapAttrs mkAttrOverridable pkgs;
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/* Add attributes to each output of a derivation without changing
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the derivation itself and check a given condition when evaluating.
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/**
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Add attributes to each output of a derivation without changing
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the derivation itself and check a given condition when evaluating.
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Type:
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extendDerivation :: Bool -> Any -> Derivation -> Derivation
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# Inputs
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`condition`
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: 1\. Function argument
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`passthru`
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: 2\. Function argument
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`drv`
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: 3\. Function argument
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# Type
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```
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extendDerivation :: Bool -> Any -> Derivation -> Derivation
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```
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*/
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extendDerivation = condition: passthru: drv:
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let
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@ -269,13 +366,24 @@ rec {
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outPath = assert condition; drv.outPath;
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};
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/* Strip a derivation of all non-essential attributes, returning
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only those needed by hydra-eval-jobs. Also strictly evaluate the
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result to ensure that there are no thunks kept alive to prevent
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garbage collection.
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/**
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Strip a derivation of all non-essential attributes, returning
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only those needed by hydra-eval-jobs. Also strictly evaluate the
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result to ensure that there are no thunks kept alive to prevent
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garbage collection.
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Type:
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hydraJob :: (Derivation | Null) -> (Derivation | Null)
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# Inputs
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`drv`
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: 1\. Function argument
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# Type
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```
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hydraJob :: (Derivation | Null) -> (Derivation | Null)
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```
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*/
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hydraJob = drv:
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let
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@ -443,32 +551,65 @@ rec {
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};
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in self;
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/* backward compatibility with old uncurried form; deprecated */
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/**
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backward compatibility with old uncurried form; deprecated
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# Inputs
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`splicePackages`
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: 1\. Function argument
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`newScope`
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: 2\. Function argument
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`otherSplices`
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: 3\. Function argument
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`keep`
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: 4\. Function argument
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`extra`
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: 5\. Function argument
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`f`
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: 6\. Function argument
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*/
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makeScopeWithSplicing =
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splicePackages: newScope: otherSplices: keep: extra: f:
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makeScopeWithSplicing'
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{ inherit splicePackages newScope; }
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{ inherit otherSplices keep extra f; };
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/* Like makeScope, but aims to support cross compilation. It's still ugly, but
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hopefully it helps a little bit.
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/**
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Like makeScope, but aims to support cross compilation. It's still ugly, but
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hopefully it helps a little bit.
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Type:
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makeScopeWithSplicing' ::
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{ splicePackages :: Splice -> AttrSet
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, newScope :: AttrSet -> ((AttrSet -> a) | Path) -> AttrSet -> a
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}
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-> { otherSplices :: Splice, keep :: AttrSet -> AttrSet, extra :: AttrSet -> AttrSet }
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-> AttrSet
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# Type
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Splice ::
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{ pkgsBuildBuild :: AttrSet
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, pkgsBuildHost :: AttrSet
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, pkgsBuildTarget :: AttrSet
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, pkgsHostHost :: AttrSet
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, pkgsHostTarget :: AttrSet
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, pkgsTargetTarget :: AttrSet
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}
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```
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makeScopeWithSplicing' ::
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{ splicePackages :: Splice -> AttrSet
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, newScope :: AttrSet -> ((AttrSet -> a) | Path) -> AttrSet -> a
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}
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-> { otherSplices :: Splice, keep :: AttrSet -> AttrSet, extra :: AttrSet -> AttrSet }
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-> AttrSet
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Splice ::
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{ pkgsBuildBuild :: AttrSet
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, pkgsBuildHost :: AttrSet
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, pkgsBuildTarget :: AttrSet
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, pkgsHostHost :: AttrSet
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, pkgsHostTarget :: AttrSet
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, pkgsTargetTarget :: AttrSet
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}
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```
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*/
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makeScopeWithSplicing' =
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{ splicePackages
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