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// file : bpkg/database.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bpkg/database>
#include <odb/schema-catalog.hxx>
#include <odb/sqlite/exceptions.hxx>
#include <bpkg/diagnostics>
using namespace std;
namespace bpkg
{
using namespace odb::sqlite;
using odb::schema_catalog;
database
open (const dir_path& d, tracer& tr, bool create)
{
tracer trace ("open");
path f (d / bpkg_dir / "bpkg.sqlite3");
if (!create && !exists (f))
fail << d << " does not look like a bpkg configuration directory";
try
{
// We don't need the thread pool.
//
unique_ptr<connection_factory> cf (new single_connection_factory);
database db (f.string (),
SQLITE_OPEN_READWRITE | (create ? SQLITE_OPEN_CREATE : 0),
true, // Enable FKs.
"", // Default VFS.
move (cf));
db.tracer (trace);
// Lock the database for as long as the connection is active. First
// we set locking_mode to EXCLUSIVE which instructs SQLite not to
// release any locks until the connection is closed. Then we force
// SQLite to acquire the write lock by starting exclusive transaction.
// See the locking_mode pragma documentation for details. This will
// also fail if the database is inaccessible (e.g., file does not
// exist, already used by another process, etc).
//
try
{
db.connection ()->execute ("PRAGMA locking_mode = EXCLUSIVE");
transaction t (db.begin_exclusive ());
if (create)
{
// Create the new schema.
//
if (db.schema_version () != 0)
fail << f << ": already has database schema";
schema_catalog::create_schema (db);
}
else
{
// Migrate the database if necessary.
//
schema_catalog::migrate (db);
}
t.commit ();
}
catch (odb::timeout&)
{
fail << "configuration " << d << " is already used by another process";
}
db.tracer (tr); // Switch to the caller's tracer.
return db;
}
catch (const database_exception& e)
{
error << f << ": " << e.message ();
throw failed ();
}
}
}
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