Initial commit

vendor/github.com/golang-migrate/migrate/v4/source/file/README.md

@@ -0,0 +1,4 @@
+# file
+
+`file:///absolute/path`  
+`file://relative/path`

vendor/github.com/golang-migrate/migrate/v4/source/file/file.go

@@ -0,0 +1,130 @@
+package file
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	nurl "net/url"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/golang-migrate/migrate/v4/source"
+)
+
+func init() {
+	source.Register("file", &File{})
+}
+
+type File struct {
+	url        string
+	path       string
+	migrations *source.Migrations
+}
+
+func (f *File) Open(url string) (source.Driver, error) {
+	u, err := nurl.Parse(url)
+	if err != nil {
+		return nil, err
+	}
+
+	// concat host and path to restore full path
+	// host might be `.`
+	p := u.Opaque
+	if len(p) == 0 {
+		p = u.Host + u.Path
+	}
+
+	if len(p) == 0 {
+		// default to current directory if no path
+		wd, err := os.Getwd()
+		if err != nil {
+			return nil, err
+		}
+		p = wd
+
+	} else if p[0:1] == "." || p[0:1] != "/" {
+		// make path absolute if relative
+		abs, err := filepath.Abs(p)
+		if err != nil {
+			return nil, err
+		}
+		p = abs
+	}
+
+	// scan directory
+	files, err := ioutil.ReadDir(p)
+	if err != nil {
+		return nil, err
+	}
+
+	nf := &File{
+		url:        url,
+		path:       p,
+		migrations: source.NewMigrations(),
+	}
+
+	for _, fi := range files {
+		if !fi.IsDir() {
+			m, err := source.DefaultParse(fi.Name())
+			if err != nil {
+				continue // ignore files that we can't parse
+			}
+			if !nf.migrations.Append(m) {
+				return nil, fmt.Errorf("unable to parse file %v", fi.Name())
+			}
+		}
+	}
+	return nf, nil
+}
+
+func (f *File) Close() error {
+	// nothing do to here
+	return nil
+}
+
+func (f *File) First() (version uint, err error) {
+	if v, ok := f.migrations.First(); !ok {
+		return 0, &os.PathError{Op: "first", Path: f.path, Err: os.ErrNotExist}
+	} else {
+		return v, nil
+	}
+}
+
+func (f *File) Prev(version uint) (prevVersion uint, err error) {
+	if v, ok := f.migrations.Prev(version); !ok {
+		return 0, &os.PathError{Op: fmt.Sprintf("prev for version %v", version), Path: f.path, Err: os.ErrNotExist}
+	} else {
+		return v, nil
+	}
+}
+
+func (f *File) Next(version uint) (nextVersion uint, err error) {
+	if v, ok := f.migrations.Next(version); !ok {
+		return 0, &os.PathError{Op: fmt.Sprintf("next for version %v", version), Path: f.path, Err: os.ErrNotExist}
+	} else {
+		return v, nil
+	}
+}
+
+func (f *File) ReadUp(version uint) (r io.ReadCloser, identifier string, err error) {
+	if m, ok := f.migrations.Up(version); ok {
+		r, err := os.Open(path.Join(f.path, m.Raw))
+		if err != nil {
+			return nil, "", err
+		}
+		return r, m.Identifier, nil
+	}
+	return nil, "", &os.PathError{Op: fmt.Sprintf("read version %v", version), Path: f.path, Err: os.ErrNotExist}
+}
+
+func (f *File) ReadDown(version uint) (r io.ReadCloser, identifier string, err error) {
+	if m, ok := f.migrations.Down(version); ok {
+		r, err := os.Open(path.Join(f.path, m.Raw))
+		if err != nil {
+			return nil, "", err
+		}
+		return r, m.Identifier, nil
+	}
+	return nil, "", &os.PathError{Op: fmt.Sprintf("read version %v", version), Path: f.path, Err: os.ErrNotExist}
+}