nixpkgs/pkgs/build-support/autonix/default.nix
2015-02-21 11:39:18 -06:00

176 lines
5.2 KiB
Nix

{ bash, callPackage, coreutils, fetchurl, findutils, nix, runCommand, stdenv
, substituteAll, wget, writeText }:
/* autonix is a collection of tools to automate packaging large collections
* of software, particularly KDE. It consists of three components:
* 1. a script (manifest) to download and hash the packages
* 2. a dependency scanner (autonix-deps) written in Haskell that examines
* the package sources and tries to guess their dependencies
* 3. a library of Nix routines (generateCollection) to generate Nix
* expressions from the output of the previous steps.
*/
with stdenv.lib;
let
/* Download the packages into the Nix store, compute their hashes,
* and generate a package manifest in ./manifest.nix.
*/
manifest =
let
script =
substituteAll
{
src = ./manifest.sh;
inherit bash coreutils findutils nix wget;
};
in
runCommand "autonix-manifest" {}
''
cp ${script} $out
chmod +x $out
'';
/* Convert a manifest.nix file to XML to be read by autonix-deps. */
writeManifestXML = filename:
let
generateStores = mapAttrs (n: pkg: pkg.store);
manifest = importManifest filename { mirror = ""; };
stores = generateStores manifest;
in
writeText "manifest.xml" (builtins.toXML stores);
/* Generate a set of Nix expressions for the collection, given a
* manifest.nix, dependencies.nix, and renames.nix in the same directory.
*/
generateCollection = dir: # path to directory
{ mirror # mirror to download packages from
, mkDerivation ? mkDerivation
, preResolve ? id # modify package set before dependency resolution
, postResolve ? id # modify package set after dependency resolution
, renames ? {}
, scope ? {}
}:
let
fix = f: let x = f x; in x;
resolvePkg = name:
mapAttrs (attr: if isDepAttr attr then resolveDeps scope else id);
resolve = mapAttrs resolvePkg;
derive = mapAttrs (name: mkDerivation);
renames_ =
if renames == {} then (import (dir + "/renames.nix") {}) else renames;
packages = importPackages dir renames_ { inherit mirror; };
in derive (postResolve (resolve (preResolve packages)));
pkgAttrName = pkg: (builtins.parseDrvName pkg.name).name;
pkgVersion = pkg: (builtins.parseDrvName pkg.name).version;
depAttrNames = [
"buildInputs" "nativeBuildInputs"
"propagatedBuildInputs" "propagatedNativeBuildInputs"
"propagatedUserEnvPkgs"
];
isDepAttr = name: builtins.elem name depAttrNames;
removePkgDeps = deps:
let removeDepsIfDepAttr = attr: value:
if isDepAttr attr then fold remove value deps else value;
in mapAttrs removeDepsIfDepAttr;
hasDep = dep: pkg:
let depAttrs = attrValues (filterAttrs (n: v: isDepAttr n) pkg);
allDeps = concatLists depAttrs;
in elem dep allDeps;
importManifest = path: { mirror }:
let
uniqueNames = manifest:
unique (map pkgAttrName manifest);
versionsOf = manifest: name:
filter (pkg: pkgAttrName pkg == name) manifest;
bestVersions = manifest:
let best = versions:
let
strictlyLess = a: b:
builtins.compareVersions (pkgVersion a) (pkgVersion b) > 0;
sorted = sort strictlyLess versions;
in head sorted;
in map (name: best (versionsOf manifest name)) (uniqueNames manifest);
withNames = manifest:
builtins.listToAttrs
(map (p: nameValuePair (toLower (pkgAttrName p)) p) manifest);
orig = import path { inherit stdenv fetchurl mirror; };
in
fold (f: x: f x) orig [ withNames bestVersions ];
importPackages = path: renames: manifestScope:
let
# Do not allow any package to depend on itself.
breakRecursion =
let removeSelfDep = pkg:
mapAttrs
(n: if isDepAttr n
then filter (dep: dep != pkg && renamed dep != pkg)
else id);
in mapAttrs removeSelfDep;
renamed = dep: renames."${dep}" or dep;
manifest = importManifest (path + "/manifest.nix") manifestScope;
deps = import (path + "/dependencies.nix") {};
mkPkg = name: manifest:
{
inherit (manifest) name src;
inherit (deps."${name}")
buildInputs nativeBuildInputs propagatedBuildInputs
propagatedNativeBuildInputs propagatedUserEnvPkgs;
};
in breakRecursion (mapAttrs mkPkg manifest);
mkDerivation = drv: stdenv.mkDerivation (drv // { src = fetchurl drv.src; });
resolveDeps = scope: map (dep: scope."${dep}" or null);
userEnvPkg = dep:
mapAttrs
(name: pkg: pkg // {
propagatedUserEnvPkgs =
(pkg.propagatedUserEnvPkgs or [])
++ optional (hasDep dep pkg) dep;
});
in
{
inherit generateCollection;
inherit importManifest;
inherit isDepAttr;
inherit manifest;
inherit removePkgDeps;
inherit resolveDeps;
inherit userEnvPkg;
inherit writeManifestXML;
blacklist = names: pkgs:
let
removeDeps = deps: mapAttrs (name: removePkgDeps deps);
removePkgs = names: pkgs: builtins.removeAttrs pkgs names;
in removeDeps names (removePkgs names pkgs);
}