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Add priority setting to stores

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This allows overriding the priority of substituters, e.g.

  $ nix-store --store ~/my-nix/ -r /nix/store/df3m4da96d84ljzxx4mygfshm1p0r2n3-geeqie-1.4 \
    --substituters 'http://cache.nixos.org?priority=100 daemon?priority=10'

Fixes #3264.
This commit is contained in:
Eelco Dolstra 2019-12-17 17:17:53 +01:00
parent 54bf5ba422
commit f8abbdd456
13 changed files with 51 additions and 47 deletions
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7
src/libstore/http-binary-cache-store.cc
View file

@ -42,13 +42,16 @@ public:
void init() override
{
// FIXME: do this lazily?
if (!diskCache->cacheExists(cacheUri, wantMassQuery_, priority)) {
if (auto cacheInfo = diskCache->cacheExists(cacheUri)) {
wantMassQuery.setDefault(cacheInfo->wantMassQuery ? "true" : "false");
priority.setDefault(fmt("%d", cacheInfo->priority));
} else {
try {
BinaryCacheStore::init();
} catch (UploadToHTTP &) {
throw Error("'%s' does not appear to be a binary cache", cacheUri);
}
diskCache->createCache(cacheUri, storeDir, wantMassQuery_, priority);
diskCache->createCache(cacheUri, storeDir, wantMassQuery, priority);
}
}