maurice/snix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Make store implementations pluggable

Browse source 
This for instance allows hydra-queue-runner to add the S3 backend
at runtime.
This commit is contained in:
Eelco Dolstra 2016-02-29 16:11:11 +01:00
parent 012f8d187c
commit 0b907321cc
3 changed files with 50 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

43
src/libstore/store-api.cc
View file

@ -314,27 +314,38 @@ void Store::exportPaths(const Paths & paths,
#include "local-store.hh"
#include "remote-store.hh"
#include "local-binary-cache-store.hh"
namespace nix {
RegisterStoreImplementation::Implementations * RegisterStoreImplementation::implementations = 0;
ref<Store> openStoreAt(const std::string & uri)
{
if (std::string(uri, 0, 7) == "file://") {
auto store = make_ref<LocalBinaryCacheStore>(std::shared_ptr<Store>(0),
"", "", // FIXME: allow the signing key to be set
std::string(uri, 7));
store->init();
return store;
for (auto fun : *RegisterStoreImplementation::implementations) {
auto store = fun(uri);
if (store) return ref<Store>(store);
}
throw Error(format("don't know how to open Nix store ‘%s’") % uri);
}
ref<Store> openStore()
{
return openStoreAt(getEnv("NIX_REMOTE"));
}
static RegisterStoreImplementation regStore([](const std::string & uri) -> std::shared_ptr<Store> {
enum { mDaemon, mLocal, mAuto } mode;
mode =
uri == "daemon" ? mDaemon :
uri == "local" ? mLocal : mAuto;
if (uri == "daemon") mode = mDaemon;
else if (uri == "local") mode = mLocal;
else if (uri == "") mode = mAuto;
else return 0;
if (mode == mAuto) {
if (LocalStore::haveWriteAccess())
@ -346,15 +357,9 @@ ref<Store> openStoreAt(const std::string & uri)
}
return mode == mDaemon
? (ref<Store>) make_ref<RemoteStore>()
: (ref<Store>) make_ref<LocalStore>();
}
ref<Store> openStore()
{
return openStoreAt(getEnv("NIX_REMOTE"));
}
? std::shared_ptr<Store>(std::make_shared<RemoteStore>())
: std::shared_ptr<Store>(std::make_shared<LocalStore>());
});
}