2013-11-22 15:41:48 +00:00
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#include "user-env.hh"
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2010-04-19 10:47:56 +00:00
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#include "util.hh"
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2010-04-21 15:08:58 +00:00
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#include "derivations.hh"
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#include "store-api.hh"
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#include "globals.hh"
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#include "shared.hh"
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#include "eval.hh"
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2013-11-19 13:09:03 +00:00
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#include "eval-inline.hh"
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2010-04-21 15:08:58 +00:00
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#include "profiles.hh"
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2010-04-19 10:47:56 +00:00
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namespace nix {
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DrvInfos queryInstalled(EvalState & state, const Path & userEnv)
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{
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2010-04-19 12:10:04 +00:00
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DrvInfos elems;
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2010-04-21 15:08:58 +00:00
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Path manifestFile = userEnv + "/manifest.nix";
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if (pathExists(manifestFile)) {
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Value v;
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2011-08-06 13:02:55 +00:00
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state.evalFile(manifestFile, v);
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2014-09-19 14:49:41 +00:00
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Bindings & bindings(*state.allocBindings(0));
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2012-10-04 19:22:25 +00:00
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getDerivations(state, v, "", bindings, elems, false);
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2013-11-19 10:18:13 +00:00
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}
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2010-04-19 10:47:56 +00:00
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return elems;
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2010-04-19 12:10:04 +00:00
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}
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2010-04-21 15:08:58 +00:00
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bool createUserEnv(EvalState & state, DrvInfos & elems,
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const Path & profile, bool keepDerivations,
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const string & lockToken)
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{
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/* Build the components in the user environment, if they don't
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exist already. */
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PathSet drvsToBuild;
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2015-07-17 17:24:28 +00:00
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for (auto & i : elems)
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if (i.queryDrvPath() != "")
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drvsToBuild.insert(i.queryDrvPath());
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2010-04-21 15:08:58 +00:00
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debug(format("building user environment dependencies"));
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Eliminate the "store" global variable
Also, move a few free-standing functions into StoreAPI and Derivation.
Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
2016-02-04 13:28:26 +00:00
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state.store->buildPaths(drvsToBuild, state.repair ? bmRepair : bmNormal);
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2010-04-21 15:08:58 +00:00
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/* Construct the whole top level derivation. */
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PathSet references;
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Value manifest;
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state.mkList(manifest, elems.size());
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unsigned int n = 0;
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2015-07-17 17:24:28 +00:00
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for (auto & i : elems) {
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2010-04-21 15:08:58 +00:00
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/* Create a pseudo-derivation containing the name, system,
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2012-12-04 13:20:36 +00:00
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output paths, and optionally the derivation path, as well
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as the meta attributes. */
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2015-07-17 17:24:28 +00:00
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Path drvPath = keepDerivations ? i.queryDrvPath() : "";
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2010-04-21 15:08:58 +00:00
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2010-10-23 18:18:07 +00:00
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Value & v(*state.allocValue());
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2015-07-23 20:05:09 +00:00
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manifest.listElems()[n++] = &v;
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2012-12-04 13:20:36 +00:00
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state.mkAttrs(v, 16);
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2010-04-21 15:08:58 +00:00
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2010-10-22 14:47:42 +00:00
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mkString(*state.allocAttr(v, state.sType), "derivation");
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2017-07-17 17:02:56 +00:00
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mkString(*state.allocAttr(v, state.sName), i.queryName());
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auto system = i.querySystem();
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if (!system.empty())
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mkString(*state.allocAttr(v, state.sSystem), system);
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2015-07-17 17:24:28 +00:00
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mkString(*state.allocAttr(v, state.sOutPath), i.queryOutPath());
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2010-04-21 15:08:58 +00:00
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if (drvPath != "")
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2015-07-17 17:24:28 +00:00
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mkString(*state.allocAttr(v, state.sDrvPath), i.queryDrvPath());
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2010-10-24 19:52:33 +00:00
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2016-02-23 13:19:14 +00:00
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// Copy each output meant for installation.
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DrvInfo::Outputs outputs = i.queryOutputs(true);
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2012-12-04 13:20:36 +00:00
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Value & vOutputs = *state.allocAttr(v, state.sOutputs);
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state.mkList(vOutputs, outputs.size());
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unsigned int m = 0;
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2015-07-17 17:24:28 +00:00
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for (auto & j : outputs) {
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2015-07-23 20:05:09 +00:00
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mkString(*(vOutputs.listElems()[m++] = state.allocValue()), j.first);
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2015-07-17 17:24:28 +00:00
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Value & vOutputs = *state.allocAttr(v, state.symbols.create(j.first));
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2012-12-04 13:20:36 +00:00
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state.mkAttrs(vOutputs, 2);
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2015-07-17 17:24:28 +00:00
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mkString(*state.allocAttr(vOutputs, state.sOutPath), j.second);
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2012-12-04 13:20:36 +00:00
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/* This is only necessary when installing store paths, e.g.,
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`nix-env -i /nix/store/abcd...-foo'. */
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Eliminate the "store" global variable
Also, move a few free-standing functions into StoreAPI and Derivation.
Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
2016-02-04 13:28:26 +00:00
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state.store->addTempRoot(j.second);
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state.store->ensurePath(j.second);
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2012-12-04 13:20:36 +00:00
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2015-07-17 17:24:28 +00:00
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references.insert(j.second);
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2012-12-04 13:20:36 +00:00
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}
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// Copy the meta attributes.
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2010-10-24 19:52:33 +00:00
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Value & vMeta = *state.allocAttr(v, state.sMeta);
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2010-10-24 20:09:37 +00:00
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state.mkAttrs(vMeta, 16);
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2015-07-17 17:24:28 +00:00
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StringSet metaNames = i.queryMetaNames();
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for (auto & j : metaNames) {
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Value * v = i.queryMeta(j);
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2013-11-19 13:29:39 +00:00
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if (!v) continue;
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2015-07-17 17:24:28 +00:00
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vMeta.attrs->push_back(Attr(state.symbols.create(j), v));
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2010-04-21 15:08:58 +00:00
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}
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2014-03-11 16:31:13 +00:00
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vMeta.attrs->sort();
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2010-10-24 19:52:33 +00:00
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v.attrs->sort();
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2012-12-03 17:19:49 +00:00
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2010-04-21 15:08:58 +00:00
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if (drvPath != "") references.insert(drvPath);
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}
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/* Also write a copy of the list of user environment elements to
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the store; we need it for future modifications of the
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environment. */
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Eliminate the "store" global variable
Also, move a few free-standing functions into StoreAPI and Derivation.
Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
2016-02-04 13:28:26 +00:00
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Path manifestFile = state.store->addTextToStore("env-manifest.nix",
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2010-04-21 15:08:58 +00:00
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(format("%1%") % manifest).str(), references);
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/* Get the environment builder expression. */
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Value envBuilder;
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2012-01-03 00:16:29 +00:00
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state.evalFile(state.findFile("nix/buildenv.nix"), envBuilder);
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2010-04-21 15:08:58 +00:00
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/* Construct a Nix expression that calls the user environment
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builder with the manifest as argument. */
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Value args, topLevel;
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2010-10-24 20:09:37 +00:00
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state.mkAttrs(args, 3);
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2010-10-22 14:47:42 +00:00
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mkString(*state.allocAttr(args, state.symbols.create("manifest")),
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2016-05-04 14:04:52 +00:00
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manifestFile, {manifestFile});
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2010-10-24 19:52:33 +00:00
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args.attrs->push_back(Attr(state.symbols.create("derivations"), &manifest));
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args.attrs->sort();
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2010-04-21 15:08:58 +00:00
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mkApp(topLevel, envBuilder, args);
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2012-12-03 17:19:49 +00:00
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2010-04-21 15:08:58 +00:00
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/* Evaluate it. */
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debug("evaluating user environment builder");
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2013-11-19 13:09:03 +00:00
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state.forceValue(topLevel);
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PathSet context;
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2014-04-04 20:19:33 +00:00
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Attr & aDrvPath(*topLevel.attrs->find(state.sDrvPath));
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Path topLevelDrv = state.coerceToPath(aDrvPath.pos ? *(aDrvPath.pos) : noPos, *(aDrvPath.value), context);
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Attr & aOutPath(*topLevel.attrs->find(state.sOutPath));
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Path topLevelOut = state.coerceToPath(aOutPath.pos ? *(aOutPath.pos) : noPos, *(aOutPath.value), context);
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2012-12-03 17:19:49 +00:00
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2010-04-21 15:08:58 +00:00
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/* Realise the resulting store expression. */
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debug("building user environment");
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2016-05-04 14:04:52 +00:00
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state.store->buildPaths({topLevelDrv}, state.repair ? bmRepair : bmNormal);
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2010-04-21 15:08:58 +00:00
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/* Switch the current user environment to the output path. */
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2016-06-02 11:33:49 +00:00
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auto store2 = state.store.dynamic_pointer_cast<LocalFSStore>();
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2010-04-21 15:08:58 +00:00
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2016-06-02 11:33:49 +00:00
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if (store2) {
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PathLocks lock;
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lockProfile(lock, profile);
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Path lockTokenCur = optimisticLockProfile(profile);
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if (lockToken != lockTokenCur) {
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2016-11-25 23:37:43 +00:00
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printError(format("profile ‘%1%’ changed while we were busy; restarting") % profile);
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2016-06-02 11:33:49 +00:00
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return false;
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}
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2012-12-03 17:19:49 +00:00
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2016-06-02 11:33:49 +00:00
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debug(format("switching to new user environment"));
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Path generation = createGeneration(ref<LocalFSStore>(store2), profile, topLevelOut);
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switchLink(profile, generation);
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}
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2010-04-21 15:08:58 +00:00
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return true;
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}
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2010-04-19 10:47:56 +00:00
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}
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