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Expose the export magic value and move LocalStore::queryReferences to Store

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This commit is contained in:
Eelco Dolstra 2016-02-15 14:48:38 +01:00
parent e03d6e0998
commit c8f4d89a34
4 changed files with 19 additions and 22 deletions
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17
src/libstore/local-store.cc
View file

@ -953,14 +953,6 @@ PathSet LocalStore::queryAllValidPaths()
}
void LocalStore::queryReferences(const Path & path,
PathSet & references)
{
ValidPathInfo info = queryPathInfo(path);
references.insert(info.references.begin(), info.references.end());
}
void LocalStore::queryReferrers_(const Path & path, PathSet & referrers)
{
SQLiteStmtUse use(stmtQueryReferrers);
@ -1493,9 +1485,6 @@ struct HashAndWriteSink : Sink
};
#define EXPORT_MAGIC 0x4558494e
static void checkSecrecy(const Path & path)
{
struct stat st;
@ -1532,7 +1521,7 @@ void LocalStore::exportPath(const Path & path, bool sign,
PathSet references;
queryReferences(path, references);
hashAndWriteSink << EXPORT_MAGIC << path << references << queryDeriver(path);
hashAndWriteSink << exportMagic << path << references << queryDeriver(path);
if (sign) {
Hash hash = hashAndWriteSink.currentHash();
@ -1608,8 +1597,8 @@ Path LocalStore::importPath(bool requireSignature, Source & source)
restorePath(unpacked, hashAndReadSource);
unsigned int magic = readInt(hashAndReadSource);
if (magic != EXPORT_MAGIC)
uint32_t magic = readInt(hashAndReadSource);
if (magic != exportMagic)
throw Error("Nix archive cannot be imported; wrong format");
Path dstPath = readStorePath(hashAndReadSource);

2
src/libstore/local-store.hh
View file

@ -108,8 +108,6 @@ public:
Hash queryPathHash(const Path & path) override;
void queryReferences(const Path & path, PathSet & references) override;
void queryReferrers(const Path & path, PathSet & referrers) override;
Path queryDeriver(const Path & path) override;

7
src/libstore/store-api.cc
View file

@ -224,6 +224,13 @@ Path computeStorePathForText(const string & name, const string & s,
}
void Store::queryReferences(const Path & path, PathSet & references)
{
ValidPathInfo info = queryPathInfo(path);
references.insert(info.references.begin(), info.references.end());
}
/* Return a string accepted by decodeValidPathInfo() that
registers the specified paths as valid. Note: it's the
responsibility of the caller to provide a closure. */

13
src/libstore/store-api.hh
View file

@ -12,6 +12,13 @@
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. */
const uint32_t exportMagic = 0x4558494e;
typedef std::map<Path, Path> Roots;
@ -158,8 +165,7 @@ public:
/* Query the set of outgoing FS references for a store path. The
result is not cleared. */
virtual void queryReferences(const Path & path,
PathSet & references) = 0;
virtual void queryReferences(const Path & path, PathSet & references);
/* Queries the set of incoming FS references for a store path.
The result is not cleared. */
@ -339,9 +345,6 @@ public:
};
const size_t storePathHashLen = 32; // base-32 characters, i.e. 160 bits
/* !!! These should be part of the store API, I guess. */
/* Throw an exception if `path' is not directly in the Nix store. */