forked from lix-project/lix
Add basic "nix build" command
Currently only builds by attribute from <nixpkgs> or the specified file, e.g. "nix build hello".
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cd2196b089
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206bbb5dc9
46
src/nix/build.cc
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46
src/nix/build.cc
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#include "command.hh"
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#include "common-args.hh"
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#include "installables.hh"
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#include "shared.hh"
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#include "store-api.hh"
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using namespace nix;
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struct CmdBuild : StoreCommand, MixDryRun, MixInstallables
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{
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CmdBuild()
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{
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}
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std::string name() override
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{
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return "build";
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}
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std::string description() override
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{
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return "build a derivation or fetch a store path";
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}
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void run(ref<Store> store) override
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{
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auto elems = evalInstallables(store);
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PathSet pathsToBuild;
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for (auto & elem : elems) {
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if (elem.isDrv)
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pathsToBuild.insert(elem.drvPath);
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else
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pathsToBuild.insert(elem.outPaths.begin(), elem.outPaths.end());
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}
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printMissing(store, pathsToBuild);
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if (dryRun) return;
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store->buildPaths(pathsToBuild);
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}
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};
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static RegisterCommand r1(make_ref<Command, CmdBuild>());
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75
src/nix/installables.cc
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75
src/nix/installables.cc
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#include "attr-path.hh"
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#include "common-opts.hh"
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#include "derivations.hh"
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#include "eval-inline.hh"
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#include "eval.hh"
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#include "get-drvs.hh"
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#include "installables.hh"
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#include "store-api.hh"
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namespace nix {
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UserEnvElems MixInstallables::evalInstallables(ref<Store> store)
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{
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UserEnvElems res;
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for (auto & installable : installables) {
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if (std::string(installable, 0, 1) == "/") {
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if (isStorePath(installable)) {
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if (isDerivation(installable)) {
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UserEnvElem elem;
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// FIXME: handle empty case, drop version
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elem.attrPath = {storePathToName(installable)};
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elem.isDrv = true;
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elem.drvPath = installable;
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res.push_back(elem);
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}
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else {
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UserEnvElem elem;
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// FIXME: handle empty case, drop version
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elem.attrPath = {storePathToName(installable)};
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elem.isDrv = false;
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elem.outPaths = {installable};
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res.push_back(elem);
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}
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}
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else
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throw UsageError(format("don't know what to do with ‘%1%’") % installable);
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}
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else {
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EvalState state({}, store);
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Expr * e = state.parseExprFromFile(resolveExprPath(lookupFileArg(state, file)));
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Value vRoot;
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state.eval(e, vRoot);
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std::map<string, string> autoArgs_;
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Bindings & autoArgs(*evalAutoArgs(state, autoArgs_));
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Value & v(*findAlongAttrPath(state, installable, autoArgs, vRoot));
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state.forceValue(v);
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DrvInfos drvs;
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getDerivations(state, v, "", autoArgs, drvs, false);
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for (auto & i : drvs) {
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UserEnvElem elem;
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elem.isDrv = true;
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elem.drvPath = i.queryDrvPath();
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res.push_back(elem);
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}
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}
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}
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return res;
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}
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}
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38
src/nix/installables.hh
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38
src/nix/installables.hh
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#pragma once
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#include "args.hh"
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namespace nix {
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struct UserEnvElem
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{
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Strings attrPath;
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// FIXME: should use boost::variant or so.
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bool isDrv;
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// Derivation case:
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Path drvPath;
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StringSet outputNames;
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// Non-derivation case:
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PathSet outPaths;
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};
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typedef std::vector<UserEnvElem> UserEnvElems;
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struct MixInstallables : virtual Args
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{
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Strings installables;
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Path file = "<nixpkgs>";
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MixInstallables()
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{
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mkFlag('f', "file", "file", "evaluate FILE rather than the default", &file);
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expectArgs("installables", &installables);
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}
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UserEnvElems evalInstallables(ref<Store> store);
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};
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}
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