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Add a Store::addToStore() variant that accepts a NAR

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As a side effect, this ensures that signatures are propagated when
copying paths between stores.

Also refactored import/export to make use of this.
This commit is contained in:
Eelco Dolstra 2016-05-04 13:36:54 +02:00
parent b6c768fb6a
commit 538a64e8c3
15 changed files with 235 additions and 338 deletions
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34
src/libstore/store-api.hh
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@ -19,7 +19,7 @@ namespace nix {
/* Size of the hash part of store paths, in base-32 characters. */
const size_t storePathHashLen = 32; // i.e. 160 bits
/* Magic header of exportPath() output. */
/* Magic header of exportPath() output (obsolete). */
const uint32_t exportMagic = 0x4558494e;
@ -253,6 +253,10 @@ public:
virtual void querySubstitutablePathInfos(const PathSet & paths,
SubstitutablePathInfos & infos) = 0;
/* Import a path into the store. */
virtual void addToStore(const ValidPathInfo & info, const std::string & nar,
bool repair = false) = 0;
/* Copy the contents of a path to the store and register the
validity the resulting path. The resulting path is returned.
The function object `filter' can be used to exclude files (see
@ -269,21 +273,6 @@ public:
/* Write a NAR dump of a store path. */
virtual void narFromPath(const Path & path, Sink & sink) = 0;
/* Export a store path, that is, create a NAR dump of the store
path and append its references and its deriver. */
virtual void exportPath(const Path & path, Sink & sink) = 0;
/* Export multiple paths in the format expected by ‘nix-store
--import’. */
void exportPaths(const Paths & paths, Sink & sink);
/* Import a sequence of NAR dumps created by exportPaths() into
the Nix store. Optionally, the contents of the NARs are
preloaded into the specified FS accessor to speed up subsequent
access. */
virtual Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor) = 0;
/* For each path, if it's a derivation, build it. Building a
derivation means ensuring that the output paths are valid. If
they are already valid, this is a no-op. Otherwise, validity
@ -397,6 +386,19 @@ public:
relation. If p refers to q, then p preceeds q in this list. */
Paths topoSortPaths(const PathSet & paths);
/* Export multiple paths in the format expected by ‘nix-store
--import’. */
void exportPaths(const Paths & paths, Sink & sink);
void exportPath(const Path & path, Sink & sink);
/* Import a sequence of NAR dumps created by exportPaths() into
the Nix store. Optionally, the contents of the NARs are
preloaded into the specified FS accessor to speed up subsequent
access. */
Paths importPaths(Source & source,
std::shared_ptr<FSAccessor> accessor);
struct Stats
{
std::atomic<uint64_t> narInfoRead{0};