mirror of https://github.com/status-im/migrate.git
128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
package file
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import (
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"fmt"
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"io"
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"io/ioutil"
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nurl "net/url"
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"os"
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"path"
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"path/filepath"
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"github.com/golang-migrate/migrate/source"
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)
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func init() {
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source.Register("file", &File{})
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}
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type File struct {
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url string
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path string
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migrations *source.Migrations
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}
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func (f *File) Open(url string) (source.Driver, error) {
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u, err := nurl.Parse(url)
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if err != nil {
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return nil, err
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}
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// concat host and path to restore full path
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// host might be `.`
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p := u.Host + u.Path
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if len(p) == 0 {
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// default to current directory if no path
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wd, err := os.Getwd()
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if err != nil {
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return nil, err
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}
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p = wd
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} else if p[0:1] == "." || p[0:1] != "/" {
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// make path absolute if relative
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abs, err := filepath.Abs(p)
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if err != nil {
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return nil, err
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}
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p = abs
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}
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// scan directory
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files, err := ioutil.ReadDir(p)
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if err != nil {
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return nil, err
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}
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nf := &File{
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url: url,
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path: p,
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migrations: source.NewMigrations(),
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}
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for _, fi := range files {
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if !fi.IsDir() {
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m, err := source.DefaultParse(fi.Name())
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if err != nil {
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continue // ignore files that we can't parse
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}
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if !nf.migrations.Append(m) {
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return nil, fmt.Errorf("unable to parse file %v", fi.Name())
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}
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}
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}
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return nf, nil
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}
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func (f *File) Close() error {
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// nothing do to here
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return nil
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}
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func (f *File) First() (version uint, err error) {
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if v, ok := f.migrations.First(); !ok {
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return 0, &os.PathError{Op: "first", Path: f.path, Err: os.ErrNotExist}
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} else {
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return v, nil
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}
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}
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func (f *File) Prev(version uint) (prevVersion uint, err error) {
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if v, ok := f.migrations.Prev(version); !ok {
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return 0, &os.PathError{Op: fmt.Sprintf("prev for version %v", version), Path: f.path, Err: os.ErrNotExist}
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} else {
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return v, nil
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}
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}
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func (f *File) Next(version uint) (nextVersion uint, err error) {
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if v, ok := f.migrations.Next(version); !ok {
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return 0, &os.PathError{Op: fmt.Sprintf("next for version %v", version), Path: f.path, Err: os.ErrNotExist}
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} else {
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return v, nil
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}
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}
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func (f *File) ReadUp(version uint) (r io.ReadCloser, identifier string, err error) {
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if m, ok := f.migrations.Up(version); ok {
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r, err := os.Open(path.Join(f.path, m.Raw))
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if err != nil {
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return nil, "", err
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}
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return r, m.Identifier, nil
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}
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return nil, "", &os.PathError{Op: fmt.Sprintf("read version %v", version), Path: f.path, Err: os.ErrNotExist}
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}
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func (f *File) ReadDown(version uint) (r io.ReadCloser, identifier string, err error) {
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if m, ok := f.migrations.Down(version); ok {
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r, err := os.Open(path.Join(f.path, m.Raw))
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if err != nil {
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return nil, "", err
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}
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return r, m.Identifier, nil
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}
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return nil, "", &os.PathError{Op: fmt.Sprintf("read version %v", version), Path: f.path, Err: os.ErrNotExist}
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}
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