forked from lix-project/lix
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
#include "common-eval-args.hh"
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#include "shared.hh"
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#include "download.hh"
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#include "util.hh"
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#include "eval.hh"
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namespace nix {
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MixEvalArgs::MixEvalArgs()
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{
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mkFlag()
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.longName("arg")
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.description("argument to be passed to Nix functions")
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.labels({"name", "expr"})
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.handler([&](std::vector<std::string> ss) { autoArgs[ss[0]] = 'E' + ss[1]; });
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mkFlag()
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.longName("argstr")
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.description("string-valued argument to be passed to Nix functions")
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.labels({"name", "string"})
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.handler([&](std::vector<std::string> ss) { autoArgs[ss[0]] = 'S' + ss[1]; });
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mkFlag()
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.shortName('I')
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.longName("include")
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.description("add a path to the list of locations used to look up <...> file names")
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.label("path")
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.handler([&](std::string s) { searchPath.push_back(s); });
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}
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Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
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{
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Bindings * res = state.allocBindings(autoArgs.size());
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for (auto & i : autoArgs) {
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Value * v = state.allocValue();
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if (i.second[0] == 'E')
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state.mkThunk_(*v, state.parseExprFromString(string(i.second, 1), absPath(".")));
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else
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mkString(*v, string(i.second, 1));
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res->push_back(Attr(state.symbols.create(i.first), v));
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}
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res->sort();
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return res;
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}
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Path lookupFileArg(EvalState & state, string s)
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{
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if (isUri(s)) {
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CachedDownloadRequest request(s);
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request.unpack = true;
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return getDownloader()->downloadCached(state.store, request).path;
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} else if (s.size() > 2 && s.at(0) == '<' && s.at(s.size() - 1) == '>') {
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Path p = s.substr(1, s.size() - 2);
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return state.findFile(p);
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} else
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return absPath(s);
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}
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}
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