diff options
Diffstat (limited to 'src/nix-env')
| -rw-r--r-- | src/nix-env/help.txt | 1 | ||||
| -rw-r--r-- | src/nix-env/nix-env.cc | 27 |
2 files changed, 28 insertions, 0 deletions
diff --git a/src/nix-env/help.txt b/src/nix-env/help.txt index 9b49f9f4576c..534d16ad3c56 100644 --- a/src/nix-env/help.txt +++ b/src/nix-env/help.txt @@ -6,6 +6,7 @@ Operations: --install / -i: add derivations to the user environment --upgrade / -u: upgrade derivation in the user environment + --set: create a user environment containing a single derivation --uninstall / -e: remove derivations from the user environment --query / -q: perform a query on an environment or Nix expression diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc index 90d799224efd..e131bf96cf49 100644 --- a/src/nix-env/nix-env.cc +++ b/src/nix-env/nix-env.cc @@ -596,6 +596,31 @@ static void opUpgrade(Globals & globals, } +static void opSet(Globals & globals, + Strings opFlags, Strings opArgs) +{ + if (opFlags.size() > 0) + throw UsageError(format("unknown flag `%1%'") % opFlags.front()); + + DrvInfos elems; + queryInstSources(globals.state, globals.instSource, opArgs, elems, true); + + if (elems.size() != 1) + throw Error("--set requires exactly one derivation"); + + DrvInfo & drv(elems.front()); + + if (drv.queryDrvPath(globals.state) != "") + store->buildDerivations(singleton<PathSet>(drv.queryDrvPath(globals.state))); + else + store->ensurePath(drv.queryOutPath(globals.state)); + + debug(format("switching to new user environment")); + Path generation = createGeneration(globals.profile, drv.queryOutPath(globals.state)); + switchLink(globals.profile, generation); +} + + static void uninstallDerivations(Globals & globals, DrvNames & selectors, Path & profile) { @@ -1152,6 +1177,8 @@ void run(Strings args) op = opUninstall; else if (arg == "--upgrade" || arg == "-u") op = opUpgrade; + else if (arg == "--set") + op = opSet; else if (arg == "--query" || arg == "-q") op = opQuery; else if (arg == "--import" || arg == "-I") /* !!! bad name */ |