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* Convert the Nix database to SQLite.

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This commit is contained in:
Eelco Dolstra 2010-02-18 13:16:59 +00:00
parent eaaa13ce47
commit c1a07f9445
6 changed files with 151 additions and 15 deletions
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119
src/libstore/local-store.cc
View file

@ -22,6 +22,16 @@
namespace nix {
class SQLiteError : public Error
{
public:
SQLiteError(sqlite3 * db, const format & f)
: Error(format("%1%: %2%") % f.str() % sqlite3_errmsg(db))
{
}
};
void checkStoreNotSymlink()
{
if (getEnv("NIX_IGNORE_SYMLINK_STORE") == "1") return;
@ -42,6 +52,7 @@ void checkStoreNotSymlink()
LocalStore::LocalStore()
{
db = 0;
substitutablePathsLoaded = false;
schemaPath = nixDBPath + "/schema";
@ -50,9 +61,6 @@ LocalStore::LocalStore()
/* Create missing state directories if they don't already exist. */
createDirs(nixStore);
createDirs(nixDBPath + "/info");
createDirs(nixDBPath + "/referrer");
createDirs(nixDBPath + "/failed");
Path profilesDir = nixStateDir + "/profiles";
createDirs(nixStateDir + "/profiles");
createDirs(nixStateDir + "/temproots");
@ -88,7 +96,12 @@ LocalStore::LocalStore()
writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
}
if (curSchema == 1) throw Error("your Nix store is no longer supported");
if (curSchema < nixSchemaVersion) upgradeStore12();
if (curSchema < 5)
throw Error(
"Your Nix store has a database in Berkeley DB format,\n"
"which is no longer supported. To convert to the new format,\n"
"please upgrade Nix to version 0.12 first.");
if (curSchema < 6) upgradeStore6();
doFsync = queryBoolSetting("fsync-metadata", false);
}
@ -99,6 +112,9 @@ LocalStore::~LocalStore()
try {
flushDelayedUpdates();
if (db && sqlite3_close(db) != SQLITE_OK)
throw SQLiteError(db, "closing database");
foreach (RunningSubstituters::iterator, i, runningSubstituters) {
i->second.to.close();
i->second.from.close();
@ -123,6 +139,22 @@ int LocalStore::getSchema()
}
#include "schema.sql.hh"
void LocalStore::initSchema()
{
if (sqlite3_open_v2((nixDBPath + "/db.sqlite").c_str(), &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
throw Error("cannot open SQLite database");
if (sqlite3_busy_timeout(db, 60000) != SQLITE_OK)
throw SQLiteError(db, "sett");
if (sqlite3_exec(db, (const char *) schema, 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "initialising database schema");
}
void canonicalisePathMetaData(const Path & path, bool recurse)
{
checkInterrupt();
@ -1171,15 +1203,78 @@ void LocalStore::verifyStore(bool checkContents)
}
/* Upgrade from schema 4 (Nix 0.11) to schema 5 (Nix >= 0.12). The
old schema uses Berkeley DB, the new one stores store path
meta-information in files. */
void LocalStore::upgradeStore12()
/* Upgrade from schema 5 (Nix 0.12) to schema 6 (Nix >= 0.15). */
void LocalStore::upgradeStore6()
{
throw Error(
"Your Nix store has a database in Berkeley DB format,\n"
"which is no longer supported. To convert to the new format,\n"
"please upgrade Nix to version 0.12 first.");
if (!lockFile(globalLock, ltWrite, false)) {
printMsg(lvlError, "waiting for exclusive access to the Nix store...");
lockFile(globalLock, ltWrite, true);
}
printMsg(lvlError, "upgrading Nix store to new schema (this may take a while)...");
initSchema();
PathSet validPaths = queryValidPaths();
sqlite3_stmt * registerStmt;
if (sqlite3_prepare_v2(db, "insert into ValidPaths (path, hash, registrationTime) values (?, ?, ?);",
-1, &registerStmt, 0) != SQLITE_OK)
throw SQLiteError(db, "creating statement");
sqlite3_stmt * addRefStmt;
if (sqlite3_prepare_v2(db, "insert into Refs (referrer, reference) values (?, ?);",
-1, &addRefStmt, 0) != SQLITE_OK)
throw SQLiteError(db, "creating statement");
if (sqlite3_exec(db, "begin;", 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "running `begin' command");
foreach (PathSet::iterator, i, validPaths) {
ValidPathInfo info = queryPathInfo(*i, true);
if (sqlite3_reset(registerStmt) != SQLITE_OK)
throw SQLiteError(db, "resetting statement");
if (sqlite3_bind_text(registerStmt, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 1");
string h = "sha256:" + printHash(info.hash);
if (sqlite3_bind_text(registerStmt, 2, h.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 2");
if (sqlite3_bind_int(registerStmt, 3, info.registrationTime) != SQLITE_OK)
throw SQLiteError(db, "binding argument 3");
if (sqlite3_step(registerStmt) != SQLITE_DONE)
throw SQLiteError(db, "registering valid path in database");
foreach (PathSet::iterator, j, info.references) {
if (sqlite3_reset(addRefStmt) != SQLITE_OK)
throw SQLiteError(db, "resetting statement");
if (sqlite3_bind_text(addRefStmt, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 1");
if (sqlite3_bind_text(addRefStmt, 2, j->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 2");
if (sqlite3_step(addRefStmt) != SQLITE_DONE)
throw SQLiteError(db, "adding reference to database");
}
std::cerr << ".";
}
std::cerr << "\n";
if (sqlite3_exec(db, "commit;", 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "running `commit' command");
if (sqlite3_finalize(registerStmt) != SQLITE_OK)
throw SQLiteError(db, "finalizing statement");
if (sqlite3_finalize(addRefStmt) != SQLITE_OK)
throw SQLiteError(db, "finalizing statement");
throw Error("foo");
writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
lockFile(globalLock, ltRead, true);
}