forked from lix-project/lix
6baa2c4420
simplifies stuff. * The format of Nix expressions and the database schema changed because of this, so it's best to delete old Nix installations.
70 lines
1.2 KiB
C++
70 lines
1.2 KiB
C++
#ifndef __FSTATE_H
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#define __FSTATE_H
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extern "C" {
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#include <aterm2.h>
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}
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#include "store.hh"
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/* Abstract syntax of Nix expressions. */
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struct ClosureElem
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{
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PathSet refs;
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};
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typedef map<Path, ClosureElem> ClosureElems;
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struct Closure
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{
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PathSet roots;
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ClosureElems elems;
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};
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typedef map<string, string> StringPairs;
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struct Derivation
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{
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PathSet outputs;
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PathSet inputs; /* Nix expressions, not actual inputs */
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string platform;
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Path builder;
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Strings args;
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StringPairs env;
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};
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struct NixExpr
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{
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enum { neClosure, neDerivation } type;
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Closure closure;
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Derivation derivation;
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};
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/* Return a canonical textual representation of an expression. */
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string printTerm(ATerm t);
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/* Throw an exception with an error message containing the given
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aterm. */
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Error badTerm(const format & f, ATerm t);
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/* Hash an aterm. */
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Hash hashTerm(ATerm t);
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/* Read an aterm from disk. */
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ATerm termFromPath(const Path & path);
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/* Write an aterm to the Nix store directory, and return its path. */
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Path writeTerm(ATerm t, const string & suffix);
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/* Parse a Nix expression. */
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NixExpr parseNixExpr(ATerm t);
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/* Parse a Nix expression. */
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ATerm unparseNixExpr(const NixExpr & ne);
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#endif /* !__FSTATE_H */
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