2 , system ? builtins.currentSystem
3 , packageSet ? (import ../..)
5 , # Attributes passed to nixpkgs. Don't build packages marked as unfree.
6 nixpkgsArgs ? { config = { allowUnfree = false; inHydra = true; }; }
10 lib = import ../../lib;
37 pkgs = packageSet (recursiveUpdate { inherit system; config.allowUnsupportedSystem = true; } nixpkgsArgs);
39 hydraJob' = if scrubJobs then hydraJob else id;
42 /* !!! Hack: poor man's memoisation function. Necessary to prevent
43 Nixpkgs from being evaluated again and again for every
45 mkPkgsFor = crossSystem: let
46 packageSet' = args: packageSet (args // { inherit crossSystem; } // nixpkgsArgs);
48 pkgs_x86_64_linux = packageSet' { system = "x86_64-linux"; };
49 pkgs_i686_linux = packageSet' { system = "i686-linux"; };
50 pkgs_aarch64_linux = packageSet' { system = "aarch64-linux"; };
51 pkgs_riscv64_linux = packageSet' { system = "riscv64-linux"; };
52 pkgs_aarch64_darwin = packageSet' { system = "aarch64-darwin"; };
53 pkgs_armv6l_linux = packageSet' { system = "armv6l-linux"; };
54 pkgs_armv7l_linux = packageSet' { system = "armv7l-linux"; };
55 pkgs_x86_64_darwin = packageSet' { system = "x86_64-darwin"; };
56 pkgs_x86_64_freebsd = packageSet' { system = "x86_64-freebsd"; };
57 pkgs_i686_freebsd = packageSet' { system = "i686-freebsd"; };
58 pkgs_i686_cygwin = packageSet' { system = "i686-cygwin"; };
59 pkgs_x86_64_cygwin = packageSet' { system = "x86_64-cygwin"; };
62 if system == "x86_64-linux" then pkgs_x86_64_linux
63 else if system == "i686-linux" then pkgs_i686_linux
64 else if system == "aarch64-linux" then pkgs_aarch64_linux
65 else if system == "riscv64-linux" then pkgs_riscv64_linux
66 else if system == "aarch64-darwin" then pkgs_aarch64_darwin
67 else if system == "armv6l-linux" then pkgs_armv6l_linux
68 else if system == "armv7l-linux" then pkgs_armv7l_linux
69 else if system == "x86_64-darwin" then pkgs_x86_64_darwin
70 else if system == "x86_64-freebsd" then pkgs_x86_64_freebsd
71 else if system == "i686-freebsd" then pkgs_i686_freebsd
72 else if system == "i686-cygwin" then pkgs_i686_cygwin
73 else if system == "x86_64-cygwin" then pkgs_x86_64_cygwin
74 else abort "unsupported system type: ${system}";
76 pkgsFor = pkgsForCross null;
79 # More poor man's memoisation
81 examplesByConfig = flip mapAttrs'
83 (_: crossSystem: nameValuePair crossSystem.config {
85 pkgsFor = mkPkgsFor crossSystem;
87 native = mkPkgsFor null;
89 candidate = examplesByConfig.${crossSystem.config} or null;
90 in if crossSystem == null
92 else if candidate != null && matchAttrs crossSystem candidate.crossSystem
93 then candidate.pkgsFor
94 else mkPkgsFor crossSystem; # uncached fallback
97 # Given a list of 'meta.platforms'-style patterns, return the sublist of
98 # `supportedSystems` containing systems that matches at least one of the given
101 # This is written in a funny way so that we only elaborate the systems once.
102 supportedMatches = let
103 supportedPlatforms = map
104 (system: systems.elaborate { inherit system; })
108 any (meta.platformMatch platform) metaPatterns;
109 matchingPlatforms = filter anyMatch supportedPlatforms;
110 in map ({ system, ...}: system) matchingPlatforms;
115 then pkgs.runCommand "evaluated-to-true" {} "touch $out"
116 else pkgs.runCommand "evaluated-to-false" {} "false";
119 /* The working or failing mails for cross builds will be sent only to
120 the following maintainers, as most package maintainers will not be
121 interested in the result of cross building a package. */
122 crossMaintainers = [ ];
125 # Generate attributes for all supported systems.
126 forAllSystems = genAttrs supportedSystems;
129 # Generate attributes for all systems matching at least one of the given
131 forMatchingSystems = metaPatterns: genAttrs (supportedMatches metaPatterns);
134 /* Build a package on the given set of platforms. The function `f'
135 is called for each supported platform with Nixpkgs for that
136 platform as an argument . We return an attribute set containing
137 a derivation for each supported platform, i.e. ‘{ x86_64-linux =
138 f pkgs_x86_64_linux; i686-linux = f pkgs_i686_linux; ... }’. */
139 testOn = testOnCross null;
142 /* Similar to the testOn function, but with an additional
143 'crossSystem' parameter for packageSet', defining the target
144 platform for cross builds. */
145 testOnCross = crossSystem: metaPatterns: f: forMatchingSystems metaPatterns
146 (system: hydraJob' (f (pkgsForCross crossSystem system)));
149 /* Given a nested set where the leaf nodes are lists of platforms,
150 map each leaf node to `testOn [platforms...] (pkgs:
151 pkgs.<attrPath>)'. */
152 mapTestOn = _mapTestOnHelper id null;
155 _mapTestOnHelper = f: crossSystem: mapAttrsRecursive
156 (path: metaPatterns: testOnCross crossSystem metaPatterns
157 (pkgs: f (getAttrFromPath path pkgs)));
159 /* Similar to the testOn function, but with an additional 'crossSystem'
160 * parameter for packageSet', defining the target platform for cross builds,
161 * and triggering the build of the host derivation. */
162 mapTestOnCross = _mapTestOnHelper
163 (addMetaAttrs { maintainers = crossMaintainers; });
166 /* Recursively map a (nested) set of derivations to an isomorphic
167 set of meta.platforms values. */
168 packagePlatforms = mapAttrs (name: value:
169 if isDerivation value then
170 value.meta.hydraPlatforms
171 or (subtractLists (value.meta.badPlatforms or [])
172 (value.meta.platforms or [ "x86_64-linux" ]))
173 else if value.recurseForDerivations or false || value.recurseForRelease or false then
174 packagePlatforms value
180 /* Common platform groups on which to test packages. */
181 inherit (platforms) unix linux darwin cygwin all;