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Eliminate the "store" global variable

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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.)
This commit is contained in:
Eelco Dolstra 2016-02-04 14:28:26 +01:00
parent 4f7824c58e
commit c10c61449f
36 changed files with 511 additions and 458 deletions
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12
src/nix-env/user-env.cc
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@ -38,7 +38,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
drvsToBuild.insert(i.queryDrvPath());
debug(format("building user environment dependencies"));
store->buildPaths(drvsToBuild, state.repair ? bmRepair : bmNormal);
state.store->buildPaths(drvsToBuild, state.repair ? bmRepair : bmNormal);
/* Construct the whole top level derivation. */
PathSet references;
@ -76,8 +76,8 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
/* This is only necessary when installing store paths, e.g.,
`nix-env -i /nix/store/abcd...-foo'. */
store->addTempRoot(j.second);
store->ensurePath(j.second);
state.store->addTempRoot(j.second);
state.store->ensurePath(j.second);
references.insert(j.second);
}
@ -100,7 +100,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
/* 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 = store->addTextToStore("env-manifest.nix",
Path manifestFile = state.store->addTextToStore("env-manifest.nix",
(format("%1%") % manifest).str(), references);
/* Get the environment builder expression. */
@ -128,7 +128,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
/* Realise the resulting store expression. */
debug("building user environment");
store->buildPaths(singleton<PathSet>(topLevelDrv), state.repair ? bmRepair : bmNormal);
state.store->buildPaths(singleton<PathSet>(topLevelDrv), state.repair ? bmRepair : bmNormal);
/* Switch the current user environment to the output path. */
PathLocks lock;
@ -141,7 +141,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
}
debug(format("switching to new user environment"));
Path generation = createGeneration(profile, topLevelOut);
Path generation = createGeneration(state.store, profile, topLevelOut);
switchLink(profile, generation);
return true;