forked from mirrors/nixpkgs
Refactor a bit to add names to intermediate computations. Add a cross
temporary result to fetch information from the evaluation to make them available inside the option declaration. Add: isNotDefined flag inside the option. svn path=/nixpkgs/trunk/; revision=17766
This commit is contained in:
Nicolas Pierron
parent
81694a7f54
commit
b15cbb639e
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@ -165,7 +165,7 @@ rec {
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declarationsOf = name: filter (m: m ? options) (modulesOf name);
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definitionsOf = name: filter (m: m ? config ) (modulesOf name);
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recurseInto = name: modules:
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recurseInto = name:
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moduleMerge (addName name) (modulesOf name);
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recurseForOption = name: modules:
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@ -184,105 +184,126 @@ rec {
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eol = "\n";
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errDefinedWithoutDeclaration = name:
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let
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badModules =
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filter (m: ! isAttrs m.config)
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(definitionsOf name);
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in
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"${eol
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}Option '${addName name}' defined without option declaration.${eol
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}${errorSource badModules}${eol
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}";
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allNames = modulesNames modules;
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getResults = m:
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let fetchResult = s: mapAttrs (n: v: v.result) s; in {
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options = fetchResult m.options;
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config = fetchResult m.config;
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};
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endRecursion = { options = {}; config = {}; };
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in if modules == [] then endRecursion else
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getResults (fix (crossResults: moduleZip {
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options = lib.zipWithNames allNames (name: values: rec {
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config = lib.getAttr name crossResults.config;
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lib.fix (result:
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moduleZip {
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options = lib.zip (name: values:
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if any isOption values then
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let
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decls = # add location to sub-module options.
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map (m:
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mapSubOptions
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(unifyOptionModule {inherit (m) key;})
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m.options
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) (declarationsOf name);
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in
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addOptionMakeUp
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{ name = addName name; recurseInto = recurseForOption; }
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(mergeOptionDecls decls)
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// {
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declarations =
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map (m: {
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source = m.key;
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}) (declarationsOf name);
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definitions =
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map (m: {
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source = m.key;
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value = m.config;
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}) (definitionsOf name);
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declarations = declarationsOf name;
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declarationSources =
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map (m: {
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source = m.key;
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}) declarations;
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config = builtins.tryEval
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(builtins.toXML (lib.getAttr name result.config));
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}
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else if all isAttrs values then
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(recurseInto name modules).options
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hasOptions = values != [];
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isOption = any lib.isOption values;
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decls = # add location to sub-module options.
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map (m:
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mapSubOptions
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(unifyOptionModule {inherit (m) key;})
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m.options
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) declarations;
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decl =
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addOptionMakeUp
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{ name = addName name; recurseInto = recurseForOption; }
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(mergeOptionDecls decls);
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value = decl // (with config; {
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inherit (config) isNotDefined;
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declarations = declarationSources;
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definitions = definitionSources;
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config = strictResult;
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});
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recurse = (recurseInto name).options;
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result =
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if isOption then value
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else if all isAttrs values then recurse
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else
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throw "${eol
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}Unexpected type where option declarations are expected.${eol
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}${errorSource (declarationsOf name)}${eol
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}"
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);
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}${errorSource declarations}${eol
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}";
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config = lib.zipWithNames (modulesNames modules) (name: values_:
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let
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hasOpt = builtins.hasAttr name result.options;
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opt = lib.getAttr name result.options;
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values = values_ ++
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optionals
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(hasOpt && isOption opt && opt ? extraConfigs)
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opt.extraConfigs;
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});
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in if hasOpt && isOption opt then
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let defs = evalDefinitions opt values; in
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lib.addErrorContext "${eol
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}while evaluating the option '${addName name}'.${eol
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}${errorSource (modulesOf name)}${eol
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}" (
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opt.apply (
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if defs == [] then
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if opt ? default then opt.default
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else throw "Not defined."
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else opt.merge defs
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)
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config = lib.zipWithNames allNames (name: values_: rec {
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option = lib.getAttr name crossResults.options;
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definitions = definitionsOf name;
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definitionSources =
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map (m: {
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source = m.key;
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value = m.config;
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}) definitions;
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values = values_ ++
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optionals (option.isOption && option.decl ? extraConfigs)
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option.decl.extraConfigs;
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defs = evalDefinitions option.decl values;
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isNotDefined = defs == [];
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value =
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lib.addErrorContext "${eol
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}while evaluating the option '${addName name}'.${eol
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}${errorSource (modulesOf name)}${eol
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}" (
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let opt = option.decl; in
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opt.apply (
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if isNotDefined then
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if opt ? default then opt.default
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else throw "Not defined."
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else opt.merge defs
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)
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);
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else if hasOpt && lib.attrNames opt == [] then
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throw (errDefinedWithoutDeclaration name)
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strictResult = builtins.tryEval (builtins.toXML value);
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else if any (v: isOption (rmProperties v)) values then
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let
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badModules =
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filter (m: isOption m.config)
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(definitionsOf name);
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in
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throw "${eol
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}Option ${addName name} is defined in the configuration section.${eol
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}${errorSource badModules}${eol
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}"
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recurse = (recurseInto name).config;
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else if all isAttrs values then
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(recurseInto name modules).config
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else
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throw (errDefinedWithoutDeclaration name)
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);
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configIsAnOption = v: isOption (rmProperties v);
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errConfigIsAnOption =
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let badModules = filter (m: configIsAnOption m.config) definitions; in
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"${eol
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}Option ${addName name} is defined in the configuration section.${eol
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}${errorSource badModules}${eol
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}";
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errDefinedWithoutDeclaration =
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let badModules = definitions; in
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"${eol
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}Option '${addName name}' defined without option declaration.${eol
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}${errorSource badModules}${eol
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}";
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result =
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if option.isOption then value
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else if !option.hasOptions then throw errDefinedWithoutDeclaration
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else if any configIsAnOption values then throw errConfigIsAnOption
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else if all isAttrs values then recurse
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# plain value during the traversal
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else throw errDefinedWithoutDeclaration;
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});
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} modules));
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} modules
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);
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fixMergeModules = initModules: {...}@args:
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lib.fix (result:
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