diff options
Diffstat (limited to 'third_party/nix/src/nix-env/user-env.cc')
| -rw-r--r-- | third_party/nix/src/nix-env/user-env.cc | 278 |
1 files changed, 137 insertions, 141 deletions
diff --git a/third_party/nix/src/nix-env/user-env.cc b/third_party/nix/src/nix-env/user-env.cc index 7b9a882811..c1c174bcc5 100644 --- a/third_party/nix/src/nix-env/user-env.cc +++ b/third_party/nix/src/nix-env/user-env.cc @@ -1,156 +1,152 @@ #include "user-env.hh" -#include "util.hh" #include "derivations.hh" -#include "store-api.hh" -#include "globals.hh" -#include "shared.hh" -#include "eval.hh" #include "eval-inline.hh" +#include "eval.hh" +#include "globals.hh" #include "profiles.hh" - +#include "shared.hh" +#include "store-api.hh" +#include "util.hh" namespace nix { - -DrvInfos queryInstalled(EvalState & state, const Path & userEnv) -{ - DrvInfos elems; - Path manifestFile = userEnv + "/manifest.nix"; - if (pathExists(manifestFile)) { - Value v; - state.evalFile(manifestFile, v); - Bindings & bindings(*state.allocBindings(0)); - getDerivations(state, v, "", bindings, elems, false); - } - return elems; +DrvInfos queryInstalled(EvalState& state, const Path& userEnv) { + DrvInfos elems; + Path manifestFile = userEnv + "/manifest.nix"; + if (pathExists(manifestFile)) { + Value v; + state.evalFile(manifestFile, v); + Bindings& bindings(*state.allocBindings(0)); + getDerivations(state, v, "", bindings, elems, false); + } + return elems; } - -bool createUserEnv(EvalState & state, DrvInfos & elems, - const Path & profile, bool keepDerivations, - const string & lockToken) -{ - /* Build the components in the user environment, if they don't - exist already. */ - PathSet drvsToBuild; - for (auto & i : elems) - if (i.queryDrvPath() != "") - drvsToBuild.insert(i.queryDrvPath()); - - debug(format("building user environment dependencies")); - state.store->buildPaths(drvsToBuild, state.repair ? bmRepair : bmNormal); - - /* Construct the whole top level derivation. */ - PathSet references; - Value manifest; - state.mkList(manifest, elems.size()); - unsigned int n = 0; - for (auto & i : elems) { - /* Create a pseudo-derivation containing the name, system, - output paths, and optionally the derivation path, as well - as the meta attributes. */ - Path drvPath = keepDerivations ? i.queryDrvPath() : ""; - - Value & v(*state.allocValue()); - manifest.listElems()[n++] = &v; - state.mkAttrs(v, 16); - - mkString(*state.allocAttr(v, state.sType), "derivation"); - mkString(*state.allocAttr(v, state.sName), i.queryName()); - auto system = i.querySystem(); - if (!system.empty()) - mkString(*state.allocAttr(v, state.sSystem), system); - mkString(*state.allocAttr(v, state.sOutPath), i.queryOutPath()); - if (drvPath != "") - mkString(*state.allocAttr(v, state.sDrvPath), i.queryDrvPath()); - - // Copy each output meant for installation. - DrvInfo::Outputs outputs = i.queryOutputs(true); - Value & vOutputs = *state.allocAttr(v, state.sOutputs); - state.mkList(vOutputs, outputs.size()); - unsigned int m = 0; - for (auto & j : outputs) { - mkString(*(vOutputs.listElems()[m++] = state.allocValue()), j.first); - Value & vOutputs = *state.allocAttr(v, state.symbols.create(j.first)); - state.mkAttrs(vOutputs, 2); - mkString(*state.allocAttr(vOutputs, state.sOutPath), j.second); - - /* This is only necessary when installing store paths, e.g., - `nix-env -i /nix/store/abcd...-foo'. */ - state.store->addTempRoot(j.second); - state.store->ensurePath(j.second); - - references.insert(j.second); - } - - // Copy the meta attributes. - Value & vMeta = *state.allocAttr(v, state.sMeta); - state.mkAttrs(vMeta, 16); - StringSet metaNames = i.queryMetaNames(); - for (auto & j : metaNames) { - Value * v = i.queryMeta(j); - if (!v) continue; - vMeta.attrs->push_back(Attr(state.symbols.create(j), v)); - } - vMeta.attrs->sort(); - v.attrs->sort(); - - if (drvPath != "") references.insert(drvPath); +bool createUserEnv(EvalState& state, DrvInfos& elems, const Path& profile, + bool keepDerivations, const string& lockToken) { + /* Build the components in the user environment, if they don't + exist already. */ + PathSet drvsToBuild; + for (auto& i : elems) + if (i.queryDrvPath() != "") drvsToBuild.insert(i.queryDrvPath()); + + debug(format("building user environment dependencies")); + state.store->buildPaths(drvsToBuild, state.repair ? bmRepair : bmNormal); + + /* Construct the whole top level derivation. */ + PathSet references; + Value manifest; + state.mkList(manifest, elems.size()); + unsigned int n = 0; + for (auto& i : elems) { + /* Create a pseudo-derivation containing the name, system, + output paths, and optionally the derivation path, as well + as the meta attributes. */ + Path drvPath = keepDerivations ? i.queryDrvPath() : ""; + + Value& v(*state.allocValue()); + manifest.listElems()[n++] = &v; + state.mkAttrs(v, 16); + + mkString(*state.allocAttr(v, state.sType), "derivation"); + mkString(*state.allocAttr(v, state.sName), i.queryName()); + auto system = i.querySystem(); + if (!system.empty()) mkString(*state.allocAttr(v, state.sSystem), system); + mkString(*state.allocAttr(v, state.sOutPath), i.queryOutPath()); + if (drvPath != "") + mkString(*state.allocAttr(v, state.sDrvPath), i.queryDrvPath()); + + // Copy each output meant for installation. + DrvInfo::Outputs outputs = i.queryOutputs(true); + Value& vOutputs = *state.allocAttr(v, state.sOutputs); + state.mkList(vOutputs, outputs.size()); + unsigned int m = 0; + for (auto& j : outputs) { + mkString(*(vOutputs.listElems()[m++] = state.allocValue()), j.first); + Value& vOutputs = *state.allocAttr(v, state.symbols.create(j.first)); + state.mkAttrs(vOutputs, 2); + mkString(*state.allocAttr(vOutputs, state.sOutPath), j.second); + + /* This is only necessary when installing store paths, e.g., + `nix-env -i /nix/store/abcd...-foo'. */ + state.store->addTempRoot(j.second); + state.store->ensurePath(j.second); + + references.insert(j.second); } - /* Also write a copy of the list of user environment elements to - the store; we need it for future modifications of the - environment. */ - Path manifestFile = state.store->addTextToStore("env-manifest.nix", - (format("%1%") % manifest).str(), references); - - /* Get the environment builder expression. */ - Value envBuilder; - state.evalFile(state.findFile("nix/buildenv.nix"), envBuilder); - - /* Construct a Nix expression that calls the user environment - builder with the manifest as argument. */ - Value args, topLevel; - state.mkAttrs(args, 3); - mkString(*state.allocAttr(args, state.symbols.create("manifest")), - manifestFile, {manifestFile}); - args.attrs->push_back(Attr(state.symbols.create("derivations"), &manifest)); - args.attrs->sort(); - mkApp(topLevel, envBuilder, args); - - /* Evaluate it. */ - debug("evaluating user environment builder"); - state.forceValue(topLevel); - PathSet context; - Attr & aDrvPath(*topLevel.attrs->find(state.sDrvPath)); - Path topLevelDrv = state.coerceToPath(aDrvPath.pos ? *(aDrvPath.pos) : noPos, *(aDrvPath.value), context); - Attr & aOutPath(*topLevel.attrs->find(state.sOutPath)); - Path topLevelOut = state.coerceToPath(aOutPath.pos ? *(aOutPath.pos) : noPos, *(aOutPath.value), context); - - /* Realise the resulting store expression. */ - debug("building user environment"); - state.store->buildPaths({topLevelDrv}, state.repair ? bmRepair : bmNormal); - - /* Switch the current user environment to the output path. */ - auto store2 = state.store.dynamic_pointer_cast<LocalFSStore>(); - - if (store2) { - PathLocks lock; - lockProfile(lock, profile); - - Path lockTokenCur = optimisticLockProfile(profile); - if (lockToken != lockTokenCur) { - printError(format("profile '%1%' changed while we were busy; restarting") % profile); - return false; - } - - debug(format("switching to new user environment")); - Path generation = createGeneration(ref<LocalFSStore>(store2), profile, topLevelOut); - switchLink(profile, generation); + // Copy the meta attributes. + Value& vMeta = *state.allocAttr(v, state.sMeta); + state.mkAttrs(vMeta, 16); + StringSet metaNames = i.queryMetaNames(); + for (auto& j : metaNames) { + Value* v = i.queryMeta(j); + if (!v) continue; + vMeta.attrs->push_back(Attr(state.symbols.create(j), v)); + } + vMeta.attrs->sort(); + v.attrs->sort(); + + if (drvPath != "") references.insert(drvPath); + } + + /* Also write a copy of the list of user environment elements to + the store; we need it for future modifications of the + environment. */ + Path manifestFile = state.store->addTextToStore( + "env-manifest.nix", (format("%1%") % manifest).str(), references); + + /* Get the environment builder expression. */ + Value envBuilder; + state.evalFile(state.findFile("nix/buildenv.nix"), envBuilder); + + /* Construct a Nix expression that calls the user environment + builder with the manifest as argument. */ + Value args, topLevel; + state.mkAttrs(args, 3); + mkString(*state.allocAttr(args, state.symbols.create("manifest")), + manifestFile, {manifestFile}); + args.attrs->push_back(Attr(state.symbols.create("derivations"), &manifest)); + args.attrs->sort(); + mkApp(topLevel, envBuilder, args); + + /* Evaluate it. */ + debug("evaluating user environment builder"); + state.forceValue(topLevel); + PathSet context; + Attr& aDrvPath(*topLevel.attrs->find(state.sDrvPath)); + Path topLevelDrv = state.coerceToPath(aDrvPath.pos ? *(aDrvPath.pos) : noPos, + *(aDrvPath.value), context); + Attr& aOutPath(*topLevel.attrs->find(state.sOutPath)); + Path topLevelOut = state.coerceToPath(aOutPath.pos ? *(aOutPath.pos) : noPos, + *(aOutPath.value), context); + + /* Realise the resulting store expression. */ + debug("building user environment"); + state.store->buildPaths({topLevelDrv}, state.repair ? bmRepair : bmNormal); + + /* Switch the current user environment to the output path. */ + auto store2 = state.store.dynamic_pointer_cast<LocalFSStore>(); + + if (store2) { + PathLocks lock; + lockProfile(lock, profile); + + Path lockTokenCur = optimisticLockProfile(profile); + if (lockToken != lockTokenCur) { + printError( + format("profile '%1%' changed while we were busy; restarting") % + profile); + return false; } - return true; -} - + debug(format("switching to new user environment")); + Path generation = + createGeneration(ref<LocalFSStore>(store2), profile, topLevelOut); + switchLink(profile, generation); + } + return true; } + +} // namespace nix |