sqldb: exclude sqlite from the JS and unsupported platform builds

sqldb/config.go

@@ -0,0 +1,55 @@
+package sqldb
+
+import (
+	"fmt"
+	"net/url"
+	"time"
+)
+
+const (
+	// defaultMaxConns is the number of permitted active and idle
+	// connections. We want to limit this so it isn't unlimited. We use the
+	// same value for the number of idle connections as, this can speed up
+	// queries given a new connection doesn't need to be established each
+	// time.
+	defaultMaxConns = 25
+
+	// connIdleLifetime is the amount of time a connection can be idle.
+	connIdleLifetime = 5 * time.Minute
+)
+
+// SqliteConfig holds all the config arguments needed to interact with our
+// sqlite DB.
+//
+//nolint:lll
+type SqliteConfig struct {
+	Timeout        time.Duration `long:"timeout" description:"The time after which a database query should be timed out."`
+	BusyTimeout    time.Duration `long:"busytimeout" description:"The maximum amount of time to wait for a database connection to become available for a query."`
+	MaxConnections int           `long:"maxconnections" description:"The maximum number of open connections to the database. Set to zero for unlimited."`
+	PragmaOptions  []string      `long:"pragmaoptions" description:"A list of pragma options to set on a database connection. For example, 'auto_vacuum=incremental'. Note that the flag must be specified multiple times if multiple options are to be set."`
+	SkipMigrations bool          `long:"skipmigrations" description:"Skip applying migrations on startup."`
+}
+
+// PostgresConfig holds the postgres database configuration.
+//
+//nolint:lll
+type PostgresConfig struct {
+	Dsn            string        `long:"dsn" description:"Database connection string."`
+	Timeout        time.Duration `long:"timeout" description:"Database connection timeout. Set to zero to disable."`
+	MaxConnections int           `long:"maxconnections" description:"The maximum number of open connections to the database. Set to zero for unlimited."`
+	SkipMigrations bool          `long:"skipmigrations" description:"Skip applying migrations on startup."`
+}
+
+func (p *PostgresConfig) Validate() error {
+	if p.Dsn == "" {
+		return fmt.Errorf("DSN is required")
+	}
+
+	// Parse the DSN as a URL.
+	_, err := url.Parse(p.Dsn)
+	if err != nil {
+		return fmt.Errorf("invalid DSN: %w", err)
+	}
+
+	return nil
+}