* Organise primops.cc a bit better.
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		|  | @ -17,6 +17,11 @@ | |||
| namespace nix { | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Constants | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| static Expr primBuiltins(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     /* Return an attribute set containing all primops.  This allows
 | ||||
|  | @ -41,6 +46,47 @@ static Expr primBuiltins(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Boolean constructors. */ | ||||
| static Expr primTrue(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return eTrue; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primFalse(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return eFalse; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the null value. */ | ||||
| static Expr primNull(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeNull(); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return a string constant representing the current platform.  Note!
 | ||||
|    that differs between platforms, so Nix expressions using | ||||
|    `__currentSystem' can evaluate to different values on different | ||||
|    platforms. */ | ||||
| static Expr primCurrentSystem(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeStr(thisSystem); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primCurrentTime(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return ATmake("Int(<int>)", time(0)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Miscellaneous | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Load and evaluate an expression from path specified by the
 | ||||
|    argument. */  | ||||
| static Expr primImport(EvalState & state, const ATermVector & args) | ||||
|  | @ -61,16 +107,201 @@ static Expr primImport(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primPathExists(EvalState & state, const ATermVector & args) | ||||
| /* Convert the argument to a string.  Paths are *not* copied to the
 | ||||
|    store, so `toString /foo/bar' yields `"/foo/bar"', not | ||||
|    `"/nix/store/whatever..."'. */ | ||||
| static Expr primToString(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     Path path = coerceToPath(state, args[0], context); | ||||
|     if (!context.empty()) | ||||
|         throw EvalError(format("string `%1%' cannot refer to other paths") % path); | ||||
|     return makeBool(pathExists(path)); | ||||
|     string s = coerceToString(state, args[0], context, true, false); | ||||
|     return makeStr(s, context); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Determine whether the argument is the null value. */ | ||||
| static Expr primIsNull(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeBool(matchNull(evalExpr(state, args[0]))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Path findDependency(Path dir, string dep) | ||||
| { | ||||
|     if (dep[0] == '/') throw EvalError( | ||||
|         format("illegal absolute dependency `%1%'") % dep); | ||||
| 
 | ||||
|     Path p = canonPath(dir + "/" + dep); | ||||
| 
 | ||||
|     if (pathExists(p)) | ||||
|         return p; | ||||
|     else | ||||
|         return ""; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Make path `p' relative to directory `pivot'.  E.g.,
 | ||||
|    relativise("/a/b/c", "a/b/x/y") => "../x/y".  Both input paths | ||||
|    should be in absolute canonical form. */ | ||||
| static string relativise(Path pivot, Path p) | ||||
| { | ||||
|     assert(pivot.size() > 0 && pivot[0] == '/'); | ||||
|     assert(p.size() > 0 && p[0] == '/'); | ||||
|          | ||||
|     if (pivot == p) return "."; | ||||
| 
 | ||||
|     /* `p' is in `pivot'? */ | ||||
|     Path pivot2 = pivot + "/"; | ||||
|     if (p.substr(0, pivot2.size()) == pivot2) { | ||||
|         return p.substr(pivot2.size()); | ||||
|     } | ||||
| 
 | ||||
|     /* Otherwise, `p' is in a parent of `pivot'.  Find up till which
 | ||||
|        path component `p' and `pivot' match, and add an appropriate | ||||
|        number of `..' components. */ | ||||
|     string::size_type i = 1; | ||||
|     while (1) { | ||||
|         string::size_type j = pivot.find('/', i); | ||||
|         if (j == string::npos) break; | ||||
|         j++; | ||||
|         if (pivot.substr(0, j) != p.substr(0, j)) break; | ||||
|         i = j; | ||||
|     } | ||||
| 
 | ||||
|     string prefix; | ||||
|     unsigned int slashes = count(pivot.begin() + i, pivot.end(), '/') + 1; | ||||
|     while (slashes--) { | ||||
|         prefix += "../"; | ||||
|     } | ||||
| 
 | ||||
|     return prefix + p.substr(i); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primDependencyClosure(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     startNest(nest, lvlDebug, "finding dependencies"); | ||||
| 
 | ||||
|     Expr attrs = evalExpr(state, args[0]); | ||||
| 
 | ||||
|     /* Get the start set. */ | ||||
|     Expr startSet = queryAttr(attrs, "startSet"); | ||||
|     if (!startSet) throw EvalError("attribute `startSet' required"); | ||||
|     ATermList startSet2 = evalList(state, startSet); | ||||
| 
 | ||||
|     Path pivot; | ||||
|     PathSet workSet; | ||||
|     for (ATermIterator i(startSet2); i; ++i) { | ||||
|         PathSet context; /* !!! what to do? */ | ||||
|         Path p = coerceToPath(state, *i, context); | ||||
|         workSet.insert(p); | ||||
|         pivot = dirOf(p); | ||||
|     } | ||||
| 
 | ||||
|     /* Get the search path. */ | ||||
|     PathSet searchPath; | ||||
|     Expr e = queryAttr(attrs, "searchPath"); | ||||
|     if (e) { | ||||
|         ATermList list = evalList(state, e); | ||||
|         for (ATermIterator i(list); i; ++i) { | ||||
|             PathSet context; /* !!! what to do? */ | ||||
|             Path p = coerceToPath(state, *i, context); | ||||
|             searchPath.insert(p); | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     Expr scanner = queryAttr(attrs, "scanner"); | ||||
|     if (!scanner) throw EvalError("attribute `scanner' required"); | ||||
|      | ||||
|     /* Construct the dependency closure by querying the dependency of
 | ||||
|        each path in `workSet', adding the dependencies to | ||||
|        `workSet'. */ | ||||
|     PathSet doneSet; | ||||
|     while (!workSet.empty()) { | ||||
| 	Path path = *(workSet.begin()); | ||||
| 	workSet.erase(path); | ||||
| 
 | ||||
| 	if (doneSet.find(path) != doneSet.end()) continue; | ||||
|         doneSet.insert(path); | ||||
| 
 | ||||
|         try { | ||||
|              | ||||
|             /* Call the `scanner' function with `path' as argument. */ | ||||
|             debug(format("finding dependencies in `%1%'") % path); | ||||
|             ATermList deps = evalList(state, makeCall(scanner, makeStr(path))); | ||||
| 
 | ||||
|             /* Try to find the dependencies relative to the `path'. */ | ||||
|             for (ATermIterator i(deps); i; ++i) { | ||||
|                 string s = evalStringNoCtx(state, *i); | ||||
|                  | ||||
|                 Path dep = findDependency(dirOf(path), s); | ||||
| 
 | ||||
|                 if (dep == "") { | ||||
|                     for (PathSet::iterator j = searchPath.begin(); | ||||
|                          j != searchPath.end(); ++j) | ||||
|                     { | ||||
|                         dep = findDependency(*j, s); | ||||
|                         if (dep != "") break; | ||||
|                     } | ||||
|                 } | ||||
|                  | ||||
|                 if (dep == "") | ||||
|                     debug(format("did NOT find dependency `%1%'") % s); | ||||
|                 else { | ||||
|                     debug(format("found dependency `%1%'") % dep); | ||||
|                     workSet.insert(dep); | ||||
|                 } | ||||
|             } | ||||
| 
 | ||||
|         } catch (Error & e) { | ||||
|             e.addPrefix(format("while finding dependencies in `%1%':\n") | ||||
|                 % path); | ||||
|             throw; | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     /* Return a list of the dependencies we've just found. */ | ||||
|     ATermList deps = ATempty; | ||||
|     for (PathSet::iterator i = doneSet.begin(); i != doneSet.end(); ++i) { | ||||
|         deps = ATinsert(deps, makeStr(relativise(pivot, *i))); | ||||
|         deps = ATinsert(deps, makeStr(*i)); | ||||
|     } | ||||
| 
 | ||||
|     debug(format("dependency list is `%1%'") % makeList(deps)); | ||||
|      | ||||
|     return makeList(deps); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primAbort(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     throw Abort(format("evaluation aborted with the following error message: `%1%'") % | ||||
|         evalString(state, args[0], context)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return an environment variable.  Use with care. */ | ||||
| static Expr primGetEnv(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string name = evalStringNoCtx(state, args[0]); | ||||
|     return makeStr(getEnv(name)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primRelativise(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; /* !!! what to do? */ | ||||
|     Path pivot = coerceToPath(state, args[0], context); | ||||
|     Path path = coerceToPath(state, args[1], context); | ||||
|     return makeStr(relativise(pivot, path)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Derivations | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Returns the hash of a derivation modulo fixed-output
 | ||||
|    subderivations.  A fixed-output derivation is a derivation with one | ||||
|    output (`out') for which an expected hash and hash algorithm are | ||||
|  | @ -324,6 +555,30 @@ static Expr primDerivationLazy(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Paths | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Convert the argument to a path.  !!! obsolete? */ | ||||
| static Expr primToPath(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     string path = coerceToPath(state, args[0], context); | ||||
|     return makeStr(canonPath(path), context); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primPathExists(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     Path path = coerceToPath(state, args[0], context); | ||||
|     if (!context.empty()) | ||||
|         throw EvalError(format("string `%1%' cannot refer to other paths") % path); | ||||
|     return makeBool(pathExists(path)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the base name of the given string, i.e., everything
 | ||||
|    following the last slash. */ | ||||
| static Expr primBaseNameOf(EvalState & state, const ATermVector & args) | ||||
|  | @ -346,24 +601,9 @@ static Expr primDirOf(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Convert the argument to a string.  Paths are *not* copied to the
 | ||||
|    store, so `toString /foo/bar' yields `"/foo/bar"', not | ||||
|    `"/nix/store/whatever..."'. */ | ||||
| static Expr primToString(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     string s = coerceToString(state, args[0], context, true, false); | ||||
|     return makeStr(s, context); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Convert the argument to a path.  !!! obsolete? */ | ||||
| static Expr primToPath(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     string path = coerceToPath(state, args[0], context); | ||||
|     return makeStr(canonPath(path), context); | ||||
| } | ||||
| /*************************************************************
 | ||||
|  * Creating files | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Convert the argument (which can be any Nix expression) to an XML
 | ||||
|  | @ -406,339 +646,6 @@ static Expr primToFile(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Boolean constructors. */ | ||||
| static Expr primTrue(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return eTrue; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primFalse(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return eFalse; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the null value. */ | ||||
| static Expr primNull(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeNull(); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Determine whether the argument is the null value. */ | ||||
| static Expr primIsNull(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeBool(matchNull(evalExpr(state, args[0]))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Determine whether the argument is a list. */ | ||||
| static Expr primIsList(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list; | ||||
|     return makeBool(matchList(evalExpr(state, args[0]), list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Path findDependency(Path dir, string dep) | ||||
| { | ||||
|     if (dep[0] == '/') throw EvalError( | ||||
|         format("illegal absolute dependency `%1%'") % dep); | ||||
| 
 | ||||
|     Path p = canonPath(dir + "/" + dep); | ||||
| 
 | ||||
|     if (pathExists(p)) | ||||
|         return p; | ||||
|     else | ||||
|         return ""; | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Make path `p' relative to directory `pivot'.  E.g.,
 | ||||
|    relativise("/a/b/c", "a/b/x/y") => "../x/y".  Both input paths | ||||
|    should be in absolute canonical form. */ | ||||
| static string relativise(Path pivot, Path p) | ||||
| { | ||||
|     assert(pivot.size() > 0 && pivot[0] == '/'); | ||||
|     assert(p.size() > 0 && p[0] == '/'); | ||||
|          | ||||
|     if (pivot == p) return "."; | ||||
| 
 | ||||
|     /* `p' is in `pivot'? */ | ||||
|     Path pivot2 = pivot + "/"; | ||||
|     if (p.substr(0, pivot2.size()) == pivot2) { | ||||
|         return p.substr(pivot2.size()); | ||||
|     } | ||||
| 
 | ||||
|     /* Otherwise, `p' is in a parent of `pivot'.  Find up till which
 | ||||
|        path component `p' and `pivot' match, and add an appropriate | ||||
|        number of `..' components. */ | ||||
|     string::size_type i = 1; | ||||
|     while (1) { | ||||
|         string::size_type j = pivot.find('/', i); | ||||
|         if (j == string::npos) break; | ||||
|         j++; | ||||
|         if (pivot.substr(0, j) != p.substr(0, j)) break; | ||||
|         i = j; | ||||
|     } | ||||
| 
 | ||||
|     string prefix; | ||||
|     unsigned int slashes = count(pivot.begin() + i, pivot.end(), '/') + 1; | ||||
|     while (slashes--) { | ||||
|         prefix += "../"; | ||||
|     } | ||||
| 
 | ||||
|     return prefix + p.substr(i); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primDependencyClosure(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     startNest(nest, lvlDebug, "finding dependencies"); | ||||
| 
 | ||||
|     Expr attrs = evalExpr(state, args[0]); | ||||
| 
 | ||||
|     /* Get the start set. */ | ||||
|     Expr startSet = queryAttr(attrs, "startSet"); | ||||
|     if (!startSet) throw EvalError("attribute `startSet' required"); | ||||
|     ATermList startSet2 = evalList(state, startSet); | ||||
| 
 | ||||
|     Path pivot; | ||||
|     PathSet workSet; | ||||
|     for (ATermIterator i(startSet2); i; ++i) { | ||||
|         PathSet context; /* !!! what to do? */ | ||||
|         Path p = coerceToPath(state, *i, context); | ||||
|         workSet.insert(p); | ||||
|         pivot = dirOf(p); | ||||
|     } | ||||
| 
 | ||||
|     /* Get the search path. */ | ||||
|     PathSet searchPath; | ||||
|     Expr e = queryAttr(attrs, "searchPath"); | ||||
|     if (e) { | ||||
|         ATermList list = evalList(state, e); | ||||
|         for (ATermIterator i(list); i; ++i) { | ||||
|             PathSet context; /* !!! what to do? */ | ||||
|             Path p = coerceToPath(state, *i, context); | ||||
|             searchPath.insert(p); | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     Expr scanner = queryAttr(attrs, "scanner"); | ||||
|     if (!scanner) throw EvalError("attribute `scanner' required"); | ||||
|      | ||||
|     /* Construct the dependency closure by querying the dependency of
 | ||||
|        each path in `workSet', adding the dependencies to | ||||
|        `workSet'. */ | ||||
|     PathSet doneSet; | ||||
|     while (!workSet.empty()) { | ||||
| 	Path path = *(workSet.begin()); | ||||
| 	workSet.erase(path); | ||||
| 
 | ||||
| 	if (doneSet.find(path) != doneSet.end()) continue; | ||||
|         doneSet.insert(path); | ||||
| 
 | ||||
|         try { | ||||
|              | ||||
|             /* Call the `scanner' function with `path' as argument. */ | ||||
|             debug(format("finding dependencies in `%1%'") % path); | ||||
|             ATermList deps = evalList(state, makeCall(scanner, makeStr(path))); | ||||
| 
 | ||||
|             /* Try to find the dependencies relative to the `path'. */ | ||||
|             for (ATermIterator i(deps); i; ++i) { | ||||
|                 string s = evalStringNoCtx(state, *i); | ||||
|                  | ||||
|                 Path dep = findDependency(dirOf(path), s); | ||||
| 
 | ||||
|                 if (dep == "") { | ||||
|                     for (PathSet::iterator j = searchPath.begin(); | ||||
|                          j != searchPath.end(); ++j) | ||||
|                     { | ||||
|                         dep = findDependency(*j, s); | ||||
|                         if (dep != "") break; | ||||
|                     } | ||||
|                 } | ||||
|                  | ||||
|                 if (dep == "") | ||||
|                     debug(format("did NOT find dependency `%1%'") % s); | ||||
|                 else { | ||||
|                     debug(format("found dependency `%1%'") % dep); | ||||
|                     workSet.insert(dep); | ||||
|                 } | ||||
|             } | ||||
| 
 | ||||
|         } catch (Error & e) { | ||||
|             e.addPrefix(format("while finding dependencies in `%1%':\n") | ||||
|                 % path); | ||||
|             throw; | ||||
|         } | ||||
|     } | ||||
| 
 | ||||
|     /* Return a list of the dependencies we've just found. */ | ||||
|     ATermList deps = ATempty; | ||||
|     for (PathSet::iterator i = doneSet.begin(); i != doneSet.end(); ++i) { | ||||
|         deps = ATinsert(deps, makeStr(relativise(pivot, *i))); | ||||
|         deps = ATinsert(deps, makeStr(*i)); | ||||
|     } | ||||
| 
 | ||||
|     debug(format("dependency list is `%1%'") % makeList(deps)); | ||||
|      | ||||
|     return makeList(deps); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primAbort(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; | ||||
|     throw Abort(format("evaluation aborted with the following error message: `%1%'") % | ||||
|         evalString(state, args[0], context)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the first element of a list. */ | ||||
| static Expr primHead(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list = evalList(state, args[0]); | ||||
|     if (ATisEmpty(list)) | ||||
|         throw Error("`head' called on an empty list"); | ||||
|     return evalExpr(state, ATgetFirst(list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return a list consisting of everything but the the first element of
 | ||||
|    a list. */ | ||||
| static Expr primTail(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list = evalList(state, args[0]); | ||||
|     if (ATisEmpty(list)) | ||||
|         throw Error("`tail' called on an empty list"); | ||||
|     return makeList(ATgetNext(list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return an environment variable.  Use with care. */ | ||||
| static Expr primGetEnv(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string name = evalStringNoCtx(state, args[0]); | ||||
|     return makeStr(getEnv(name)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the names of the attributes in an attribute set as a sorted
 | ||||
|    list of strings. */ | ||||
| static Expr primAttrNames(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermMap attrs; | ||||
|     queryAllAttrs(evalExpr(state, args[0]), attrs); | ||||
| 
 | ||||
|     StringSet names; | ||||
|     for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) | ||||
|         names.insert(aterm2String(i->key)); | ||||
| 
 | ||||
|     ATermList list = ATempty; | ||||
|     for (StringSet::const_reverse_iterator i = names.rbegin(); | ||||
|          i != names.rend(); ++i) | ||||
|         list = ATinsert(list, makeStr(*i, PathSet())); | ||||
| 
 | ||||
|     return makeList(list); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Apply a function to every element of a list. */ | ||||
| static Expr primMap(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     Expr fun = evalExpr(state, args[0]); | ||||
|     ATermList list = evalList(state, args[1]); | ||||
| 
 | ||||
|     ATermList res = ATempty; | ||||
|     for (ATermIterator i(list); i; ++i) | ||||
|         res = ATinsert(res, makeCall(fun, *i)); | ||||
| 
 | ||||
|     return makeList(ATreverse(res)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return a string constant representing the current platform.  Note!
 | ||||
|    that differs between platforms, so Nix expressions using | ||||
|    `__currentSystem' can evaluate to different values on different | ||||
|    platforms. */ | ||||
| static Expr primCurrentSystem(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return makeStr(thisSystem); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primCurrentTime(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     return ATmake("Int(<int>)", time(0)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Dynamic version of the `.' operator. */ | ||||
| static Expr primGetAttr(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string attr = evalStringNoCtx(state, args[0]); | ||||
|     return evalExpr(state, makeSelect(args[1], toATerm(attr))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Dynamic version of the `?' operator. */ | ||||
| static Expr primHasAttr(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string attr = evalStringNoCtx(state, args[0]); | ||||
|     return evalExpr(state, makeOpHasAttr(args[1], toATerm(attr))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primRemoveAttrs(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermMap attrs; | ||||
|     queryAllAttrs(evalExpr(state, args[0]), attrs, true); | ||||
|      | ||||
|     ATermList list = evalList(state, args[1]); | ||||
| 
 | ||||
|     for (ATermIterator i(list); i; ++i) | ||||
|         /* It's not an error for *i not to exist. */ | ||||
|         attrs.remove(toATerm(evalStringNoCtx(state, *i))); | ||||
| 
 | ||||
|     return makeAttrs(attrs); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primRelativise(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     PathSet context; /* !!! what to do? */ | ||||
|     Path pivot = coerceToPath(state, args[0], context); | ||||
|     Path path = coerceToPath(state, args[1], context); | ||||
|     return makeStr(relativise(pivot, path)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primAdd(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeInt(i1 + i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primSub(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeInt(i1 - i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primLessThan(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeBool(i1 < i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| struct FilterFromExpr : PathFilter | ||||
| { | ||||
|     EvalState & state; | ||||
|  | @ -787,6 +694,139 @@ static Expr primFilterSource(EvalState & state, const ATermVector & args) | |||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Attribute sets | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Return the names of the attributes in an attribute set as a sorted
 | ||||
|    list of strings. */ | ||||
| static Expr primAttrNames(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermMap attrs; | ||||
|     queryAllAttrs(evalExpr(state, args[0]), attrs); | ||||
| 
 | ||||
|     StringSet names; | ||||
|     for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) | ||||
|         names.insert(aterm2String(i->key)); | ||||
| 
 | ||||
|     ATermList list = ATempty; | ||||
|     for (StringSet::const_reverse_iterator i = names.rbegin(); | ||||
|          i != names.rend(); ++i) | ||||
|         list = ATinsert(list, makeStr(*i, PathSet())); | ||||
| 
 | ||||
|     return makeList(list); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Dynamic version of the `.' operator. */ | ||||
| static Expr primGetAttr(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string attr = evalStringNoCtx(state, args[0]); | ||||
|     return evalExpr(state, makeSelect(args[1], toATerm(attr))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Dynamic version of the `?' operator. */ | ||||
| static Expr primHasAttr(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     string attr = evalStringNoCtx(state, args[0]); | ||||
|     return evalExpr(state, makeOpHasAttr(args[1], toATerm(attr))); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primRemoveAttrs(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermMap attrs; | ||||
|     queryAllAttrs(evalExpr(state, args[0]), attrs, true); | ||||
|      | ||||
|     ATermList list = evalList(state, args[1]); | ||||
| 
 | ||||
|     for (ATermIterator i(list); i; ++i) | ||||
|         /* It's not an error for *i not to exist. */ | ||||
|         attrs.remove(toATerm(evalStringNoCtx(state, *i))); | ||||
| 
 | ||||
|     return makeAttrs(attrs); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Lists | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| /* Determine whether the argument is a list. */ | ||||
| static Expr primIsList(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list; | ||||
|     return makeBool(matchList(evalExpr(state, args[0]), list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return the first element of a list. */ | ||||
| static Expr primHead(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list = evalList(state, args[0]); | ||||
|     if (ATisEmpty(list)) | ||||
|         throw Error("`head' called on an empty list"); | ||||
|     return evalExpr(state, ATgetFirst(list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Return a list consisting of everything but the the first element of
 | ||||
|    a list. */ | ||||
| static Expr primTail(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     ATermList list = evalList(state, args[0]); | ||||
|     if (ATisEmpty(list)) | ||||
|         throw Error("`tail' called on an empty list"); | ||||
|     return makeList(ATgetNext(list)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /* Apply a function to every element of a list. */ | ||||
| static Expr primMap(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     Expr fun = evalExpr(state, args[0]); | ||||
|     ATermList list = evalList(state, args[1]); | ||||
| 
 | ||||
|     ATermList res = ATempty; | ||||
|     for (ATermIterator i(list); i; ++i) | ||||
|         res = ATinsert(res, makeCall(fun, *i)); | ||||
| 
 | ||||
|     return makeList(ATreverse(res)); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * Integer arithmetic | ||||
|  *************************************************************/ | ||||
| 
 | ||||
| 
 | ||||
| static Expr primAdd(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeInt(i1 + i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primSub(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeInt(i1 - i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| static Expr primLessThan(EvalState & state, const ATermVector & args) | ||||
| { | ||||
|     int i1 = evalInt(state, args[0]); | ||||
|     int i2 = evalInt(state, args[1]); | ||||
|     return makeBool(i1 < i2); | ||||
| } | ||||
| 
 | ||||
| 
 | ||||
| /*************************************************************
 | ||||
|  * String manipulation | ||||
|  *************************************************************/ | ||||
|  | @ -821,41 +861,56 @@ void EvalState::addPrimOps() | |||
| { | ||||
|     addPrimOp("builtins", 0, primBuiltins); | ||||
|          | ||||
|     // Constants
 | ||||
|     addPrimOp("true", 0, primTrue); | ||||
|     addPrimOp("false", 0, primFalse); | ||||
|     addPrimOp("null", 0, primNull); | ||||
|     addPrimOp("__currentSystem", 0, primCurrentSystem); | ||||
|     addPrimOp("__currentTime", 0, primCurrentTime); | ||||
| 
 | ||||
|     // Miscellaneous
 | ||||
|     addPrimOp("import", 1, primImport); | ||||
|     addPrimOp("__pathExists", 1, primPathExists); | ||||
|     addPrimOp("derivation!", 1, primDerivationStrict); | ||||
|     addPrimOp("derivation", 1, primDerivationLazy); | ||||
|     addPrimOp("baseNameOf", 1, primBaseNameOf); | ||||
|     addPrimOp("dirOf", 1, primDirOf); | ||||
|     addPrimOp("toString", 1, primToString); | ||||
|     addPrimOp("__toPath", 1, primToPath); | ||||
|     addPrimOp("__toXML", 1, primToXML); | ||||
|     addPrimOp("isNull", 1, primIsNull); | ||||
|     addPrimOp("__isList", 1, primIsList); | ||||
|     addPrimOp("dependencyClosure", 1, primDependencyClosure); | ||||
|     addPrimOp("abort", 1, primAbort); | ||||
|     addPrimOp("__head", 1, primHead); | ||||
|     addPrimOp("__tail", 1, primTail); | ||||
|     addPrimOp("__getEnv", 1, primGetEnv); | ||||
|     addPrimOp("__attrNames", 1, primAttrNames); | ||||
| 
 | ||||
|     addPrimOp("map", 2, primMap); | ||||
|     addPrimOp("__getAttr", 2, primGetAttr); | ||||
|     addPrimOp("__hasAttr", 2, primHasAttr); | ||||
|     addPrimOp("removeAttrs", 2, primRemoveAttrs); | ||||
|     addPrimOp("relativise", 2, primRelativise); | ||||
|     addPrimOp("__add", 2, primAdd); | ||||
|     addPrimOp("__sub", 2, primSub); | ||||
|     addPrimOp("__lessThan", 2, primLessThan); | ||||
| 
 | ||||
|     // Derivations
 | ||||
|     addPrimOp("derivation!", 1, primDerivationStrict); | ||||
|     addPrimOp("derivation", 1, primDerivationLazy); | ||||
| 
 | ||||
|     // Paths
 | ||||
|     addPrimOp("__toPath", 1, primToPath); | ||||
|     addPrimOp("__pathExists", 1, primPathExists); | ||||
|     addPrimOp("baseNameOf", 1, primBaseNameOf); | ||||
|     addPrimOp("dirOf", 1, primDirOf); | ||||
| 
 | ||||
|     // Creating files
 | ||||
|     addPrimOp("__toXML", 1, primToXML); | ||||
|     addPrimOp("__toFile", 2, primToFile); | ||||
|     addPrimOp("__filterSource", 2, primFilterSource); | ||||
| 
 | ||||
|     // Attribute sets
 | ||||
|     addPrimOp("__attrNames", 1, primAttrNames); | ||||
|     addPrimOp("__getAttr", 2, primGetAttr); | ||||
|     addPrimOp("__hasAttr", 2, primHasAttr); | ||||
|     addPrimOp("removeAttrs", 2, primRemoveAttrs); | ||||
| 
 | ||||
|     // Lists
 | ||||
|     addPrimOp("__isList", 1, primIsList); | ||||
|     addPrimOp("__head", 1, primHead); | ||||
|     addPrimOp("__tail", 1, primTail); | ||||
|     addPrimOp("map", 2, primMap); | ||||
| 
 | ||||
|     // Integer arithmetic
 | ||||
|     addPrimOp("__add", 2, primAdd); | ||||
|     addPrimOp("__sub", 2, primSub); | ||||
|     addPrimOp("__lessThan", 2, primLessThan); | ||||
| 
 | ||||
|     // String manipulation
 | ||||
|     addPrimOp("__substring", 3, prim_substring); | ||||
|     addPrimOp("__stringLength", 1, prim_stringLength); | ||||
| } | ||||
|  |  | |||
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