Start fleshing out database related functions

internal/database/database.go

@@ -0,0 +1,44 @@
+package database
+
+import (
+	"path/filepath"
+
+	"github.com/apex/log"
+	"github.com/jmoiron/sqlx"
+	_ "github.com/mattn/go-sqlite3"
+	"github.com/openobservatory/gooni/internal/bindata"
+	"github.com/pkg/errors"
+	migrate "github.com/rubenv/sql-migrate"
+)
+
+// RunMigrations runs the database migrations
+func RunMigrations(db *sqlx.DB) error {
+	migrations := &migrate.AssetMigrationSource{
+		Asset:    bindata.Asset,
+		AssetDir: bindata.AssetDir,
+		Dir:      "data/migrations",
+	}
+	n, err := migrate.Exec(db.DB, "sqlite3", migrations, migrate.Up)
+	if err != nil {
+		return err
+	}
+	log.Debugf("performed %d migrations", n)
+	return nil
+}
+
+func Connect(path string) (*sqlx.DB, error) {
+	db, err := sqlx.Connect("sqlite3", path)
+	if err != nil {
+		return nil, err
+	}
+	// XXX RunMigrations(db)
+	return db, nil
+}
+
+func DefaultDatabasePath() (string, error) {
+	home, err := GetOONIHome()
+	if err != nil {
+		return errors.Wrap(err, "default database path")
+	}
+	return filepath.Join(home, "db", "main.db"), nil
+}