forked from lix-project/lix
249988a787
value; this potentially dangerous feature enables better sharing for those paths for which the content is known in advance (e.g., because a content hash is given). * Fast builds: if we can expand all output paths of a derive expression, we don't have to build.
76 lines
1.3 KiB
C++
76 lines
1.3 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 fstate-expressions. */
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typedef list<FSId> FSIds;
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struct SliceElem
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{
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string path;
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FSId id;
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FSIds refs;
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};
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typedef list<SliceElem> SliceElems;
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struct Slice
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{
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FSIds roots;
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SliceElems elems;
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};
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typedef pair<string, FSId> DeriveOutput;
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typedef pair<string, string> StringPair;
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typedef list<DeriveOutput> DeriveOutputs;
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typedef list<StringPair> StringPairs;
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struct Derive
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{
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DeriveOutputs outputs;
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FSIds inputs;
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string builder;
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string platform;
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StringPairs env;
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};
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struct FState
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{
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enum { fsSlice, fsDerive } type;
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Slice slice;
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Derive derive;
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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, given its id. */
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ATerm termFromId(const FSId & id);
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/* Write an aterm to the Nix store directory, and return its hash. */
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FSId writeTerm(ATerm t, const string & suffix, FSId id = FSId());
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/* Parse an fstate-expression. */
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FState parseFState(ATerm t);
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/* Parse an fstate-expression. */
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ATerm unparseFState(const FState & fs);
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#endif /* !__FSTATE_H */
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