478 lines
19 KiB
Nix
478 lines
19 KiB
Nix
# Utility functions.
|
|
|
|
let
|
|
|
|
inherit (builtins)
|
|
head tail isList stringLength substring lessThan sub
|
|
listToAttrs attrNames hasAttr;
|
|
|
|
in
|
|
|
|
rec {
|
|
|
|
# "Fold" a binary function `op' between successive elements of
|
|
# `list' with `nul' as the starting value, i.e., `fold op nul [x_1
|
|
# x_2 ... x_n] == op x_1 (op x_2 ... (op x_n nul))'. (This is
|
|
# Haskell's foldr).
|
|
fold = op: nul: list:
|
|
if list == []
|
|
then nul
|
|
else op (head list) (fold op nul (tail list));
|
|
|
|
# Concatenate a list of lists.
|
|
concatLists =
|
|
fold (x: y: x ++ y) [];
|
|
|
|
|
|
# Concatenate a list of strings.
|
|
concatStrings =
|
|
fold (x: y: x + y) "";
|
|
|
|
|
|
# Place an element between each element of a list, e.g.,
|
|
# `intersperse "," ["a" "b" "c"]' returns ["a" "," "b" "," "c"].
|
|
intersperse = separator: list:
|
|
if list == [] || tail list == []
|
|
then list
|
|
else [(head list) separator]
|
|
++ (intersperse separator (tail list));
|
|
|
|
toList = x : if (__isList x) then x else [x];
|
|
|
|
concatStringsSep = separator: list:
|
|
concatStrings (intersperse separator list);
|
|
|
|
|
|
# Flatten the argument into a single list; that is, nested lists are
|
|
# spliced into the top-level lists. E.g., `flatten [1 [2 [3] 4] 5]
|
|
# == [1 2 3 4 5]' and `flatten 1 == [1]'.
|
|
flatten = x:
|
|
if isList x
|
|
then fold (x: y: (flatten x) ++ y) [] x
|
|
else [x];
|
|
|
|
|
|
# Return an attribute from nested attribute sets. For instance ["x"
|
|
# "y"] applied to some set e returns e.x.y, if it exists. The
|
|
# default value is returned otherwise.
|
|
# comment: I'd rename this to getAttrRec or something like that .. (has the same name as builtin.getAttr) - Marc Weber
|
|
getAttr = attrPath : default : e :
|
|
let {
|
|
attr = head attrPath;
|
|
body =
|
|
if attrPath == [] then e
|
|
else if builtins ? hasAttr && builtins.hasAttr attr e
|
|
then getAttr (tail attrPath) default (builtins.getAttr attr e)
|
|
else default;
|
|
};
|
|
#getAttr = attrPath: default: e: getAttrMap id;
|
|
|
|
# the same as getAttr but if the element exists map the value using function f
|
|
# corresponds to the maybe function of haskell
|
|
getAttrMap = f : attrPath : default : e :
|
|
let {
|
|
attr = head attrPath;
|
|
body =
|
|
if attrPath == [] then e
|
|
else if builtins ? hasAttr && builtins.hasAttr attr e
|
|
then f (getAttr (tail attrPath) default (builtins.getAttr attr e))
|
|
else default;
|
|
};
|
|
|
|
|
|
|
|
# Filter a list using a predicate; that is, return a list containing
|
|
# every element from `list' for which `pred' returns true.
|
|
filter = pred: list:
|
|
fold (x: y: if pred x then [x] ++ y else y) [] list;
|
|
|
|
|
|
# Return true if `list' has an element `x':
|
|
elem = x: list: fold (a: bs: x == a || bs) false list;
|
|
|
|
|
|
# Find the sole element in the list matching the specified
|
|
# predicate, or returns the default value.
|
|
findSingle = pred: default: list:
|
|
let found = filter pred list;
|
|
in if found == [] then default
|
|
else if tail found != [] then
|
|
abort "Multiple elements match predicate in findSingle."
|
|
else head found;
|
|
|
|
|
|
# Return true if each element of a list is equal, false otherwise.
|
|
eqLists = xs: ys:
|
|
if xs == [] && ys == [] then true
|
|
else if xs == [] || ys == [] then false
|
|
else head xs == head ys && eqLists (tail xs) (tail ys);
|
|
|
|
|
|
# Determine whether a filename ends in the given suffix.
|
|
hasSuffix = ext: fileName:
|
|
let lenFileName = stringLength fileName;
|
|
lenExt = stringLength ext;
|
|
in !(lessThan lenFileName lenExt) &&
|
|
substring (sub lenFileName lenExt) lenFileName fileName == ext;
|
|
|
|
|
|
# Bring in a path as a source, filtering out all Subversion and CVS
|
|
# directories, as well as backup files (*~).
|
|
cleanSource =
|
|
let filter = name: type: let baseName = baseNameOf (toString name); in ! (
|
|
# Filter out Subversion and CVS directories.
|
|
(type == "directory" && (name == ".svn" || name == "CVS")) ||
|
|
# Filter out backup files.
|
|
(hasSuffix "~" name)
|
|
);
|
|
in src: builtins.filterSource filter src;
|
|
|
|
|
|
# Return a singleton list or an empty list, depending on a boolean
|
|
# value. Useful when building lists with optional elements
|
|
# (e.g. `++ optional (system == "i686-linux") flashplayer').
|
|
optional = cond: elem: if (cond) then [elem] else [];
|
|
|
|
whenFlip = x : cond : if (cond) then x else "";
|
|
|
|
|
|
# Return a list of integers from `first' up to and including `last'.
|
|
range = first: last:
|
|
if builtins.lessThan last first
|
|
then []
|
|
else [first] ++ range (builtins.add first 1) last;
|
|
|
|
# Return true only if there is an attribute and it is true.
|
|
checkFlag = attrSet: name:
|
|
if (name == "true") then true else
|
|
if (name == "false") then false else
|
|
if (isInList (getAttr ["flags"] [] attrSet) name) then true else
|
|
getAttr [name] false attrSet ;
|
|
|
|
logicalOR = x: y: x || y;
|
|
logicalAND = x: y: x && y;
|
|
|
|
# Input : attrSet, [ [name default] ... ], name
|
|
# Output : its value or default.
|
|
getValue = attrSet: argList: name:
|
|
( getAttr [name] (if checkFlag attrSet name then true else
|
|
if argList == [] then null else
|
|
let x = builtins.head argList; in
|
|
if (head x) == name then
|
|
(head (tail x))
|
|
else (getValue attrSet
|
|
(tail argList) name)) attrSet );
|
|
|
|
# Input : attrSet, [[name default] ...], [ [flagname reqs..] ... ]
|
|
# Output : are reqs satisfied? It's asserted.
|
|
checkReqs = attrSet : argList : condList :
|
|
(
|
|
fold logicalAND true
|
|
(map (x: let name = (head x) ; in
|
|
|
|
((checkFlag attrSet name) ->
|
|
(fold logicalAND true
|
|
(map (y: let val=(getValue attrSet argList y); in
|
|
(val!=null) && (val!=false))
|
|
(tail x))))) condList)) ;
|
|
|
|
|
|
isInList = list: x:
|
|
if (list == []) then false else
|
|
if (x == (head list)) then true else
|
|
isInList (tail list) x;
|
|
|
|
uniqList = {inputList, outputList ? []}:
|
|
if (inputList == []) then outputList else
|
|
let x=head inputList;
|
|
newOutputList = outputList ++
|
|
(if (isInList outputList x) then [] else [x]);
|
|
in uniqList {outputList=newOutputList;
|
|
inputList = (tail inputList);};
|
|
|
|
condConcat = name: list: checker:
|
|
if list == [] then name else
|
|
if checker (head list) then
|
|
condConcat
|
|
(name + (head (tail list)))
|
|
(tail (tail list))
|
|
checker
|
|
else condConcat
|
|
name (tail (tail list)) checker;
|
|
|
|
# calls a function (f attr value ) for each record item. returns a list
|
|
mapRecordFlatten = f : r : map (attr: f attr (builtins.getAttr attr r) ) (attrNames r);
|
|
|
|
# to be used with listToAttrs (_a_ttribute _v_alue)
|
|
# TODO should be renamed to nv because niksnut has renamed the attribute attr to name
|
|
av = name : value : { inherit name value; };
|
|
# attribute set containing one attribute
|
|
avs = name : value : listToAttrs [ (av name value) ];
|
|
# adds / replaces an attribute of an attribute set
|
|
setAttr = set : name : v : set // (avs name v);
|
|
|
|
id = x : x;
|
|
# true if all/ at least one element(s) satisfy f
|
|
all = f : l : fold logicalAND true (map f l);
|
|
any = f : l : fold logicalOR false (map f l);
|
|
|
|
# iterates over a list of attributes collecting the attribute attr if it exists
|
|
catAttrs = attr : l : fold ( s : l : if (hasAttr attr s) then [(builtins.getAttr attr s)] ++ l else l) [] l;
|
|
|
|
mergeAttrs = fold ( x : y : x // y) {};
|
|
|
|
# Using f = a : b = b the result is similar to //
|
|
# merge attributes with custom function handling the case that the attribute
|
|
# exists in both sets
|
|
mergeAttrsWithFunc = f : set1 : set2 :
|
|
fold (n: set : if (__hasAttr n set)
|
|
then setAttr set n (f (__getAttr n set) (__getAttr n set2))
|
|
else set )
|
|
set1 (__attrNames set2);
|
|
|
|
# merging two attribute set concatenating the values of same attribute names
|
|
# eg { a = 7; } { a = [ 2 3 ]; } becomes { a = [ 7 2 3 ]; }
|
|
mergeAttrsConcatenateValues = mergeAttrsWithFunc ( a : b : (toList a) ++ (toList b) );
|
|
|
|
# returns atribute values as a list
|
|
flattenAttrs = set : map ( attr : builtins.getAttr attr set) (attrNames set);
|
|
mapIf = cond : f : fold ( x : l : if (cond x) then [(f x)] ++ l else l) [];
|
|
|
|
# Marc 2nd proposal: (not everything has been tested in detail yet..)
|
|
|
|
# usage / example
|
|
# flagConfig = {
|
|
# } // (enableDisableFeature "flagName" "configure_feature" extraAttrs;)
|
|
#
|
|
# is equal to
|
|
# flagConfig = {
|
|
# flagName = { cfgOption = "--enable-configure_feature"; } // extraAttrs;
|
|
# no_flagName = { cfgOption = "--disable-configure_feature"; };
|
|
enableDisableFeature = flagName : configure_feature : extraAttrs :
|
|
listToAttrs [ ( av flagName ({ cfgOption = "--enable-${configure_feature}"; } // extraAttrs ) )
|
|
( av "no_${flagName}" ({ cfgOption = "--disable-${configure_feature}"; } ) )];
|
|
|
|
# calls chooseOptionsByFlags2 with some preprocessing
|
|
# chooseOptionsByFlags2 returns an attribute set meant to be used to create new derivaitons.
|
|
# see mkDerivationByConfiguration in all-packages.nix and the examples given below.
|
|
# You can just copy paste them into all-packages.nix to test them..
|
|
|
|
chooseOptionsByFlags = { flagConfig, args, optionals ? [], defaults ? [],
|
|
collectExtraPhaseActions ? [] } :
|
|
let passedOptionals = filter ( x : hasAttr x args ) optionals; # these are in optionals and in args
|
|
# we simply merge in <optional_name> = { buildInputs = <arg.<optional_name>; pass = <arg.optional_name>; }
|
|
flagConfigWithOptionals = flagConfig // ( listToAttrs
|
|
(map ( o : av o ( { buildInputs = o; pass = avs o (builtins.getAttr o args); }
|
|
// getAttr [o] {} flagConfig )
|
|
)
|
|
passedOptionals ) );
|
|
|
|
in chooseOptionsByFlags2 flagConfigWithOptionals collectExtraPhaseActions args
|
|
( (getAttr ["flags"] defaults args) ++ passedOptionals);
|
|
|
|
chooseOptionsByFlags2 = flagConfig : collectExtraPhaseActions : args : flags :
|
|
let
|
|
# helper function
|
|
collectFlags = # state : flags :
|
|
fold ( flag : s : (
|
|
if (hasAttr flag s.result) then s # this state has already been visited
|
|
else if (! hasAttr flag flagConfig) then throw "unkown flag `${flag}' specified"
|
|
else let fDesc = (builtins.getAttr flag flagConfig);
|
|
implied = flatten ( getAttr ["implies"] [] fDesc );
|
|
blocked = flatten ( getAttr ["blocks"] [] fDesc );
|
|
# add this flag
|
|
s2 = s // { result = ( setAttr s.result flag (builtins.getAttr flag flagConfig) );
|
|
blockedFlagsBy = s.blockedFlagsBy
|
|
// listToAttrs (map (b: av b flag ) blocked); };
|
|
# add implied flags
|
|
in collectFlags s2 implied
|
|
));
|
|
|
|
# chosen contains flagConfig but only having those attributes elected by flags
|
|
# (or by implies attributes of elected attributes)
|
|
options = let stateOpts = collectFlags { blockedFlagsBy = {}; result = {}; }
|
|
(flags ++ ( if (hasAttr "mandatory" flagConfig) then ["mandatory"] else [] ));
|
|
# these options have not been chosen (neither by flags nor by implies)
|
|
unsetOptions = filter ( x : (! hasAttr x stateOpts.result) && (hasAttr ("no_"+x) flagConfig))
|
|
( attrNames flagConfig );
|
|
# no add the corresponding no_ attributes as well ..
|
|
state = collectFlags stateOpts (map ( x : "no_" + x ) unsetOptions);
|
|
in # check for blockings:
|
|
assert ( all id ( map ( b: if (hasAttr b state.result)
|
|
then throw "flag ${b} is blocked by flag ${__getAttr b state.blockedFlagsBy}"
|
|
else true )
|
|
(attrNames state.blockedFlagsBy) ) );
|
|
state.result;
|
|
flatOptions = flattenAttrs options;
|
|
|
|
# helper functions :
|
|
collectAttrs = attr : catAttrs attr flatOptions;
|
|
optsConcatStrs = delimiter : attrs : concatStrings
|
|
( intersperse delimiter (flatten ( collectAttrs attrs ) ) );
|
|
|
|
ifStringGetArg = x : if (__isAttrs x) then x # ( TODO implement __isString ?)
|
|
else avs x (__getAttr x args);
|
|
|
|
in assert ( all id ( mapRecordFlatten ( attr : r : if ( all id ( flatten (getAttr ["assertion"] [] r ) ) )
|
|
then true else throw "assertion failed flag ${attr}" )
|
|
options) );
|
|
( rec {
|
|
|
|
#foldOptions = attr: f : start: fold f start (catAttrs attr flatOptions);
|
|
|
|
# compared to flags flagsSet does also contain the implied flags.. This makes it easy to write assertions. ( assert args.
|
|
inherit options flatOptions collectAttrs optsConcatStrs;
|
|
|
|
buildInputs = map ( attr: if (! hasAttr attr args) then throw "argument ${attr} is missing!" else (builtins.getAttr attr args) )
|
|
(flatten (catAttrs "buildInputs" flatOptions));
|
|
propagatedBuildInputs = map ( attr: if (! hasAttr attr args) then throw "argument ${attr} is missing!" else (builtins.getAttr attr args) )
|
|
(flatten (catAttrs "propagatedBuildInputs" flatOptions));
|
|
|
|
configureFlags = optsConcatStrs " " "cfgOption";
|
|
|
|
#flags = listToAttrs (map ( flag: av flag (hasAttr flag options) ) (attrNames flagConfig) );
|
|
flags_prefixed = listToAttrs (map ( flag: av ("flag_set_"+flag) (hasAttr flag options) ) (attrNames flagConfig) );
|
|
|
|
pass = mergeAttrs ( map ifStringGetArg ( flatten (collectAttrs "pass") ) );
|
|
} # now add additional phase actions (see examples)
|
|
// listToAttrs ( map ( x : av x (optsConcatStrs "\n" x) ) collectExtraPhaseActions ) );
|
|
}
|
|
|
|
/*
|
|
|
|
# ###########################################################################
|
|
# configuration tutorial .. examples and tests..
|
|
# Copy this into all-packages.nix and try
|
|
|
|
# The following derviations will all fail..
|
|
# But they will print the passed options so that you can get to know
|
|
# how these configurations ought to work.
|
|
# TODO: There is no nice way to pass an otpion yet.
|
|
# I could imagine something like
|
|
# flags = [ "flagA" "flagB" { flagC = 4; } ];
|
|
|
|
# They are named:
|
|
# simpleYes, simpleNo,
|
|
# defaultsimpleYes, defaultsimpleNo
|
|
# optionalssimpleYes, optionalssimpleNo
|
|
# bitingsimpleYes can only be ran with -iA blockingBiteMonster
|
|
# assertionsimpleNo
|
|
# of course you can use -iA and the attribute name as well to select these examples
|
|
|
|
# dummy build input
|
|
whoGetsTheFlagFirst = gnused;
|
|
whoGetsTheFlagLast = gnumake;
|
|
|
|
# simple example demonstrating containing one flag.
|
|
# features:
|
|
# * configure options are passed automatically
|
|
# * buildInputs are collected (they are special, see the setup script)
|
|
# * they can be passed by additional name as well using pass = { inherit (args) python }
|
|
# ( or short (value not attrs) : pass = "python" )
|
|
# * an attribute named the same way as the flag is added indicating
|
|
# true/ false (flag has been set/ not set)
|
|
# * extra phase dependend commands can be added
|
|
# Its easy to add your own stuff using co.collectAttrs or co.optsConcatStrs
|
|
# ( perhaps this name will change?)
|
|
simpleFlagYesNoF = namePrefix : extraFlagAttrs : mkDerivationByConfiguration ( {
|
|
flagConfig = {
|
|
flag = { name = namePrefix + "simpleYes";
|
|
cfgOption = [ "--Yes" "--you-dont-need-a-list" ];
|
|
buildInputs = [ "whoGetsTheFlagFirst" ];
|
|
pass = { inherit gnumake; };
|
|
extraConfigureCmd = "echo Hello, it worked! ";
|
|
blocks = "bitingMonster";
|
|
};
|
|
no_flag = { name = namePrefix + "simpleNo";
|
|
cfgOption = "--no";
|
|
implies = ["bitingMonster"];
|
|
};
|
|
bitingMonster = {
|
|
extraConfigureCmd = "echo Ill bite you";
|
|
};
|
|
gnutar = { cfgOption="--with-gnutar";
|
|
# buildInputs and pass will be added automatically if gnutar is added to optionals
|
|
};
|
|
# can be used to check configure options of dependencies
|
|
# eg testFlag = { assertion = [ arg.desktop.flag_set_wmii (! arg.desktop.flag_set_gnome) (! arg.desktops.flag_set_kde ]; }
|
|
assertionFlag = { assertion = false; }; # assert is nix language keyword
|
|
|
|
};
|
|
|
|
collectExtraPhaseActions = [ "extraConfigureCmd" ];
|
|
|
|
extraAttrs = co : {
|
|
name = ( __head (co.collectAttrs "name") );
|
|
|
|
unpackPhase = "
|
|
echo my name is
|
|
echo \$name
|
|
echo
|
|
echo flag given \\(should be 1 or empty string\\) ?
|
|
echo \$flag_set_flag
|
|
echo
|
|
echo my build inputs are
|
|
echo \$buildInputs
|
|
echo
|
|
echo my configuration flags are
|
|
echo \$configureFlags
|
|
echo
|
|
echo what about gnumake? Did it pass?
|
|
echo \$gnumake
|
|
echo
|
|
echo configurePhase command is
|
|
echo $\configurePhase
|
|
echo
|
|
echo gnutar passed? \\(optional test\\)
|
|
echo \$gnutar
|
|
echo
|
|
echo dying now
|
|
echo die_Hopefully_Soon
|
|
";
|
|
configurePhase = co.extraConfigureCmd;
|
|
};
|
|
} // extraFlagAttrs );
|
|
|
|
|
|
simpleYes = simpleFlagYesNoF "" {} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
flags = ["flag"];
|
|
};
|
|
# note the "I'll bite you" because of the implies attribute
|
|
simpleNo = simpleFlagYesNoF "" {} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
flags = [];
|
|
};
|
|
|
|
# specifying defaults by adding a default attribute
|
|
|
|
yesAgainDefault = simpleFlagYesNoF "default" { defaults = [ "flag" ];} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
};
|
|
noAgainOverridingDefault = simpleFlagYesNoF "default" { defaults = [ "flag" ];} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
flags = [];
|
|
};
|
|
|
|
# requested by Michael Raskin: activate flag automatically if dependency is passed:
|
|
withGnutarOptional = simpleFlagYesNoF "optionals" { optionals = [ "gnutar" ];} {
|
|
flags = [ "flag" ]; # I only need to pass this to trigger name optionalssimpleYes
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
inherit gnutar;
|
|
};
|
|
withoutGnutarOptional = simpleFlagYesNoF "optionals" { optionals = [ "gnutar" ];} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
};
|
|
|
|
# blocking example, this shouldn't even start building:
|
|
blockingBiteMonster = simpleFlagYesNoF "biting" {} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
flags = [ "flag" "bitingMonster" ];
|
|
};
|
|
|
|
# assertion example this shouldn't even start building:
|
|
assertion = simpleFlagYesNoF "assertion" {} {
|
|
inherit whoGetsTheFlagFirst lib stdenv;
|
|
flags = [ "assertionFlag" ];
|
|
};
|
|
*/
|