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Before adjusting queryReferences/Referrers to handle shared state paths

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This commit is contained in:
Wouter den Breejen 2007-07-19 12:25:38 +00:00
parent b46db4dea7
commit 7f2140d17f
8 changed files with 115 additions and 39 deletions
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45
src/libstore/local-store.cc
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@ -131,6 +131,12 @@ static TableId dbStateInfo = 0;
*/
static TableId dbStateRevisions = 0;
/* dbSharedState :: Path -> Path
*
* Lists all paths that are shared with other paths
*/
static TableId dbSharedState = 0;
bool Substitute::operator == (const Substitute & sub) const
{
return program == sub.program
@ -205,6 +211,7 @@ LocalStore::LocalStore(bool reserveSpace)
dbStateComponentReferrers = nixDB.openTable("referrers_s_c", true);
dbStateStateReferrers = nixDB.openTable("referrers_s_s", true);
dbStateRevisions = nixDB.openTable("staterevisions");
dbSharedState = nixDB.openTable("sharedState");
dbSolidStateReferences = nixDB.openTable("references_solid_c_s"); /* The contents of this table is included in references_c_s */
@ -406,6 +413,7 @@ static string stripPrefix(const string & prefix, const string & s)
//TODO move the code of get(State)Referrers into query variant ..... !!!!!!!!!!!!!!!!!!!!!!!!!!!!???
/********************/
static PathSet getReferrers(const Transaction & txn, const Path & store_or_statePath, const int revision)
{
@ -631,6 +639,8 @@ void LocalStore::queryStateReferrers(const Path & storePath, PathSet & stateRefe
nix::queryStateReferrersTxn(noTxn, storePath, stateReferrers, revision);
}
/********************/
void setDeriver(const Transaction & txn, const Path & storePath, const Path & deriver)
{
@ -1731,6 +1741,41 @@ bool querySolidStateReferencesTxn(const Transaction & txn, const Path & statePat
return notempty;
}
void setSharedStateTxn(const Transaction & txn, const Path & statePath, const Path & shared_with)
{
//Remove earlier entries
nixDB.delPair(txn, dbSharedState, statePath);
//Set new entry
nixDB.setString(txn, dbSharedState, statePath, shared_with);
}
bool querySharedStateTxn(const Transaction & txn, const Path & statePath, Path & shared_with)
{
return nixDB.queryString(txn, dbSharedState, statePath, shared_with);
}
PathSet toNonSharedPathSetTxn(const Transaction & txn, const PathSet & statePaths)
{
PathSet real_statePaths;
//we loop over all paths in the list
for (PathSet::const_iterator i = statePaths.begin(); i != statePaths.end(); ++i){
Path sharedPath;
Path checkPath = *i;
real_statePaths.insert(checkPath);
//for each path we do querySharedStateTxn until there the current path is not a shared path anymore
while(querySharedStateTxn(txn, checkPath, sharedPath)){
real_statePaths.erase(checkPath);
real_statePaths.insert(sharedPath);
checkPath = sharedPath;
}
}
return real_statePaths;
}
/* Upgrade from schema 1 (Nix <= 0.7) to schema 2 (Nix >= 0.8). */
static void upgradeStore07()
{