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file.go
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file.go
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package file
import (
"context"
"errors"
"fmt"
"os"
"path/filepath"
"sync"
"github.com/mitchellh/mapstructure"
"github.com/rilldata/rill/runtime/drivers"
"github.com/rilldata/rill/runtime/pkg/activity"
"github.com/rilldata/rill/runtime/pkg/fileutil"
"go.uber.org/zap"
"gopkg.in/yaml.v3"
)
func init() {
drivers.Register("file", driver{name: "file"})
drivers.Register("local_file", driver{name: "local_file"})
drivers.RegisterAsConnector("local_file", driver{name: "local_file"})
}
var spec = drivers.Spec{
DisplayName: "Local file",
Description: "Import Locally Stored File.",
SourceProperties: []*drivers.PropertySpec{
{
Key: "path",
Type: drivers.StringPropertyType,
Required: true,
DisplayName: "Path",
Description: "Path or URL to file",
Placeholder: "/path/to/file",
},
{
Key: "format",
Type: drivers.StringPropertyType,
Required: false,
DisplayName: "Format",
Description: "Either CSV or Parquet. Inferred if not set.",
Placeholder: "csv",
},
},
ImplementsFileStore: true,
}
type driver struct {
name string
}
type configProperties struct {
DSN string `mapstructure:"dsn"`
AllowHostAccess bool `mapstructure:"allow_host_access"`
}
// a smaller subset of relevant parts of rill.yaml
type rillYAML struct {
IgnorePaths []string `yaml:"ignore_paths"`
}
func (d driver) Open(instanceID string, config map[string]any, client *activity.Client, logger *zap.Logger) (drivers.Handle, error) {
if instanceID == "" {
return nil, errors.New("file driver can't be shared")
}
conf := &configProperties{}
err := mapstructure.WeakDecode(config, conf)
if err != nil {
return nil, err
}
path, err := fileutil.ExpandHome(conf.DSN)
if err != nil {
return nil, err
}
absPath, err := filepath.Abs(path)
if err != nil {
return nil, err
}
c := &connection{
logger: logger,
root: absPath,
driverConfig: conf,
driverName: d.name,
}
if err := c.checkRoot(); err != nil {
return nil, err
}
// Read rill.yaml and fill in `ignore_paths`
rawYaml, err := c.Get(context.Background(), "/rill.yaml")
if err == nil {
yml := &rillYAML{}
err = yaml.Unmarshal([]byte(rawYaml), yml)
if err == nil {
c.ignorePaths = yml.IgnorePaths
}
}
return c, nil
}
func (d driver) Spec() drivers.Spec {
return spec
}
func (d driver) HasAnonymousSourceAccess(ctx context.Context, src map[string]any, logger *zap.Logger) (bool, error) {
return true, nil
}
func (d driver) TertiarySourceConnectors(ctx context.Context, src map[string]any, logger *zap.Logger) ([]string, error) {
return nil, nil
}
type sourceProperties struct {
Path string `mapstructure:"path"`
Format string `mapstructure:"format"`
}
func parseSourceProperties(props map[string]any) (*sourceProperties, error) {
conf := &sourceProperties{}
err := mapstructure.Decode(props, conf)
if err != nil {
return nil, err
}
return conf, nil
}
type connection struct {
logger *zap.Logger
// root should be absolute path
root string
driverConfig *configProperties
driverName string
watcherMu sync.Mutex
watcherCount int
watcher *watcher
ignorePaths []string
}
// Config implements drivers.Connection.
func (c *connection) Config() map[string]any {
m := make(map[string]any, 0)
_ = mapstructure.Decode(c.driverConfig, m)
return m
}
// Close implements drivers.Connection.
func (c *connection) Close() error {
return nil
}
// AsRegistry implements drivers.Connection.
func (c *connection) AsRegistry() (drivers.RegistryStore, bool) {
return nil, false
}
// AsCatalogStore implements drivers.Connection.
func (c *connection) AsCatalogStore(instanceID string) (drivers.CatalogStore, bool) {
return nil, false
}
// AsRepoStore implements drivers.Connection.
func (c *connection) AsRepoStore(instanceID string) (drivers.RepoStore, bool) {
return c, true
}
// AsAdmin implements drivers.Handle.
func (c *connection) AsAdmin(instanceID string) (drivers.AdminService, bool) {
return nil, false
}
// AsAI implements drivers.Handle.
func (c *connection) AsAI(instanceID string) (drivers.AIService, bool) {
return nil, false
}
// AsOLAP implements drivers.Connection.
func (c *connection) AsOLAP(instanceID string) (drivers.OLAPStore, bool) {
return nil, false
}
// Migrate implements drivers.Connection.
func (c *connection) Migrate(ctx context.Context) (err error) {
return nil
}
// MigrationStatus implements drivers.Connection.
func (c *connection) MigrationStatus(ctx context.Context) (current, desired int, err error) {
return 0, 0, nil
}
// AsObjectStore implements drivers.Connection.
func (c *connection) AsObjectStore() (drivers.ObjectStore, bool) {
return nil, false
}
// AsModelExecutor implements drivers.Handle.
func (c *connection) AsModelExecutor(instanceID string, opts *drivers.ModelExecutorOptions) (drivers.ModelExecutor, bool) {
return nil, false
}
// AsModelManager implements drivers.Handle.
func (c *connection) AsModelManager(instanceID string) (drivers.ModelManager, bool) {
return nil, false
}
// AsTransporter implements drivers.Connection.
func (c *connection) AsTransporter(from, to drivers.Handle) (drivers.Transporter, bool) {
return nil, false
}
// AsFileStore implements drivers.Connection.
func (c *connection) AsFileStore() (drivers.FileStore, bool) {
return c, true
}
// AsSQLStore implements drivers.Connection.
func (c *connection) AsSQLStore() (drivers.SQLStore, bool) {
return nil, false
}
// AsNotifier implements drivers.Connection.
func (c *connection) AsNotifier(properties map[string]any) (drivers.Notifier, error) {
return nil, drivers.ErrNotNotifier
}
// checkPath checks that the connection's root is a valid directory.
func (c *connection) checkRoot() error {
info, err := os.Stat(c.root)
if err != nil {
if os.IsNotExist(err) {
return fmt.Errorf("repo: directory does not exist at '%s'", c.root)
}
return err
}
if !info.IsDir() {
return fmt.Errorf("repo: file is not a directory '%s'", c.root)
}
return nil
}