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Add a Config class to simplify adding configuration settings

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The typical use is to inherit Config and add Setting<T> members:

  class MyClass : private Config
  {
    Setting<int> foo{this, 123, "foo", "the number of foos to use"};
    Setting<std::string> bar{this, "blabla", "bar", "the name of the bar"};

    MyClass() : Config(readConfigFile("/etc/my-app.conf"))
    {
      std::cout << foo << "\n"; // will print 123 unless overriden
    }
  };

Currently, this is used by Store and its subclasses for store
parameters. You now get a warning if you specify a non-existant store
parameter in a store URI.
This commit is contained in:
Eelco Dolstra 2017-04-13 15:55:38 +02:00
parent 568a099c88
commit 2040240e23
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GPG key ID: 8170B4726D7198DE
16 changed files with 334 additions and 40 deletions
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5
src/libstore/local-store.cc
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@ -38,13 +38,14 @@ namespace nix {
LocalStore::LocalStore(const Params & params)
: Store(params)
, LocalFSStore(params)
, realStoreDir(get(params, "real", rootDir != "" ? rootDir + "/nix/store" : storeDir))
, realStoreDir_{this, false, rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
"physical path to the Nix store"}
, realStoreDir(realStoreDir_)
, dbDir(stateDir + "/db")
, linksDir(realStoreDir + "/.links")
, reservedPath(dbDir + "/reserved")
, schemaPath(dbDir + "/schema")
, trashDir(realStoreDir + "/trash")
, requireSigs(trim(settings.get("signed-binary-caches", std::string("*"))) != "") // FIXME: rename option
, publicKeys(getDefaultPublicKeys())
{
auto state(_state.lock());