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Allow substituting from different storeDir

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Substituters can substitute from one store dir to another with a
little bit of help. The store api just needs to have a CA so it can
recompute the store path based on the new store dir. We can only do
this for fixed output derivations with no references, though.
This commit is contained in:
Matthew Bauer 2020-06-12 09:49:09 -05:00
parent d558fb98f6
commit 79c169d1c6
7 changed files with 50 additions and 9 deletions
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2
src/libstore/store-api.hh
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@ -445,7 +445,7 @@ public:
sizes) of a set of paths. If a path does not have substitute
info, it's omitted from the resulting ‘infos’ map. */
virtual void querySubstitutablePathInfos(const StorePathSet & paths,
SubstitutablePathInfos & infos) { return; };
SubstitutablePathInfos & infos, std::map<std::string, std::string> pathsCA = {}) { return; };
/* Import a path into the store. */
virtual void addToStore(const ValidPathInfo & info, Source & narSource,