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nix-gh/corepkgs/derivation.nix

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Revert "Get rid of unicode quotes (#1140)" This reverts commit f78126bfd6b6c8477fcdbc09b2f98772dbe9a1e7. There really is no need for such a massive change...
2016-11-26 00:37:43 +01:00
/* This is the implementation of the ‘derivation’ builtin function.
It's actually a wrapper around the ‘derivationStrict’ primop. */
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
derivation: Don't require certain function arguments Turns out that in Nixpkgs, derivation is actually called without a ‘name’ argument in some places :-(
2014-04-04 21:53:47 +02:00
drvAttrs @ { outputs ? [ "out" ], ... }:
* Move the implementation of the ‘derivation’ primop into a separate file.
2012-01-03 15:01:47 +01:00
let
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
strict = derivationStrict drvAttrs;
Make "nix-build -A <derivation>.<output>" do the right thing For example, given a derivation with outputs "out", "man" and "bin": $ nix-build -A pkg produces ./result pointing to the "out" output; $ nix-build -A pkg.man produces ./result-man pointing to the "man" output; $ nix-build -A pkg.all produces ./result, ./result-man and ./result-bin; $ nix-build -A pkg.all -A pkg2 produces ./result, ./result-man, ./result-bin and ./result-2.
2012-11-26 15:39:10 +01:00
* Export the original input attributes of the derivation in ‘drvAttrs’. This will simplify the implementation of functions such as ‘overrideDerivation’ in Nixpkgs, which need to filter out any added attributes such as outPath.
2012-01-04 12:56:15 +01:00
commonAttrs = drvAttrs // (builtins.listToAttrs outputsList) //
{ all = map (x: x.value) outputsList;
inherit drvAttrs;
};
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
* Drop the inefficient "Path" suffix in output attribute names.
2012-01-03 16:27:18 +01:00
outputToAttrListElement = outputName:
{ name = outputName;
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
value = commonAttrs // {
* Drop the inefficient "Path" suffix in output attribute names.
2012-01-03 16:27:18 +01:00
outPath = builtins.getAttr outputName strict;
* Move the implementation of the ‘derivation’ primop into a separate file.
2012-01-03 15:01:47 +01:00
drvPath = strict.drvPath;
type = "derivation";
* currentOutput -> outputName. "current" implies some temporal aspect.
2012-01-04 13:00:39 +01:00
inherit outputName;
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
};
* Move the implementation of the ‘derivation’ primop into a separate file.
2012-01-03 15:01:47 +01:00
};
Make "nix-build -A <derivation>.<output>" do the right thing For example, given a derivation with outputs "out", "man" and "bin": $ nix-build -A pkg produces ./result pointing to the "out" output; $ nix-build -A pkg.man produces ./result-man pointing to the "man" output; $ nix-build -A pkg.all produces ./result, ./result-man and ./result-bin; $ nix-build -A pkg.all -A pkg2 produces ./result, ./result-man, ./result-bin and ./result-2.
2012-11-26 15:39:10 +01:00
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
outputsList = map outputToAttrListElement outputs;
Make "nix-build -A <derivation>.<output>" do the right thing For example, given a derivation with outputs "out", "man" and "bin": $ nix-build -A pkg produces ./result pointing to the "out" output; $ nix-build -A pkg.man produces ./result-man pointing to the "man" output; $ nix-build -A pkg.all produces ./result, ./result-man and ./result-bin; $ nix-build -A pkg.all -A pkg2 produces ./result, ./result-man, ./result-bin and ./result-2.
2012-11-26 15:39:10 +01:00
* Simplify the implementation of "derivation" a bit: lift out the common attribution so that they're evaluated only once, etc. Note that the default output is now the first element of the "outputs" attribute, rather than the first element of the sorted list of outputs. This seems more user-friendly.
2012-01-04 12:04:19 +01:00
in (builtins.head outputsList).value