From f9b9844eabe29250298f8120fa32a3b98c718454 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 14 Sep 2015 13:46:09 +0200
Subject: Create empty database in cfg-create

---
 bpkg/buildfile      |  8 ++++---
 bpkg/cfg-create.cxx |  5 +++++
 bpkg/database       | 21 +++++++++++++++++++
 bpkg/database.cxx   | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 91 insertions(+), 3 deletions(-)
 create mode 100644 bpkg/database
 create mode 100644 bpkg/database.cxx

(limited to 'bpkg')

diff --git a/bpkg/buildfile b/bpkg/buildfile
index 0d9bf61..272e051 100644
--- a/bpkg/buildfile
+++ b/bpkg/buildfile
@@ -4,10 +4,12 @@
 
 using cli
 
-import libs  = libbutl%lib{butl}
-import libs += libbpkg%lib{bpkg}
+import libs  = libbpkg%lib{bpkg}
+import libs += libbutl%lib{butl}
+import libs += libodb%lib{odb}
+import libs += libodb-sqlite%lib{odb-sqlite}
 
-exe{bpkg}: cxx{diagnostics utility}                          \
+exe{bpkg}: cxx{database diagnostics utility}                 \
                   cli.cxx{common-options} cxx{types-parsers} \
   cxx{bpkg}       cli.cxx{bpkg-options}                      \
   cxx{help}       cli.cxx{help-options}                      \
diff --git a/bpkg/cfg-create.cxx b/bpkg/cfg-create.cxx
index 1875c75..08e64b1 100644
--- a/bpkg/cfg-create.cxx
+++ b/bpkg/cfg-create.cxx
@@ -11,6 +11,7 @@
 
 #include <bpkg/types>
 #include <bpkg/utility>
+#include <bpkg/database>
 #include <bpkg/diagnostics>
 
 using namespace std;
@@ -145,6 +146,10 @@ namespace bpkg
       run (args);
     }
 
+    // Create the database.
+    //
+    open (d, true);
+
     if (verb)
     {
       d.complete ();
diff --git a/bpkg/database b/bpkg/database
new file mode 100644
index 0000000..820555d
--- /dev/null
+++ b/bpkg/database
@@ -0,0 +1,21 @@
+// file      : bpkg/database -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef BPKG_DATABASE
+#define BPKG_DATABASE
+
+#include <odb/sqlite/database.hxx>
+
+#include <bpkg/types>
+
+namespace bpkg
+{
+  using odb::sqlite::database;
+  using odb::sqlite::transaction;
+
+  database
+  open (const dir_path& configuration, bool create = false);
+}
+
+#endif // BPKG_DATABASE
diff --git a/bpkg/database.cxx b/bpkg/database.cxx
new file mode 100644
index 0000000..18bb5af
--- /dev/null
+++ b/bpkg/database.cxx
@@ -0,0 +1,60 @@
+// file      : bpkg/database.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <bpkg/database>
+
+#include <memory>  // unique_ptr
+#include <utility> // move()
+
+#include <odb/sqlite/exceptions.hxx>
+
+#include <bpkg/types>
+#include <bpkg/diagnostics>
+
+using namespace std;
+
+namespace bpkg
+{
+  using namespace odb::sqlite;
+
+  database
+  open (const dir_path& d, bool create)
+  {
+    path f (d / path ("bpkg.sqlite3"));
+
+    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));
+
+      // 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).
+      //
+      {
+        db.connection ()->execute ("PRAGMA locking_mode = EXCLUSIVE");
+        transaction t (db.begin_exclusive ());
+        t.commit ();
+      }
+
+      return db;
+    }
+    catch (const database_exception& e)
+    {
+      error << f << ": " << e.message ();
+      throw failed ();
+    }
+  }
+}
-- 
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