update go-bindata with latest source.Migration helper

README.md

@@ -45,7 +45,7 @@ is easy. Just implement the [source/driver interface](source/driver.go).
 
 ## CLI usage 
 
-```bash
+```
 # dowload, build and install the CLI tool
 # -tags takes database and source drivers and will only build those
 $ go get -u -tags 'postgres' -o migrate github.com/mattes/migrate/cli

source/go-bindata/README.md

@@ -33,8 +33,8 @@ import (
 )
 
 func main() {
-  // Wrap assets into Resource
-  resource := bindata.Resource(migrations.AssetNames(),
+	// wrap assets into Resource
+  s := bindata.Resource(migrations.AssetNames(),
     func(name string) ([]byte, error) {
       return migrations.Asset(name)
     })

source/go-bindata/go-bindata.go

@@ -6,9 +6,6 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
-	"regexp"
-	"sort"
-	"strconv"
 
 	"github.com/mattes/migrate/source"
 )
@@ -31,15 +28,10 @@ func init() {
 	source.Register("go-bindata", &Bindata{})
 }
 
-// filename example: `123_name.up.ext`
-// filename example: `123_name.down.ext`
-var filenameRegex = regexp.MustCompile(`^([0-9]+)_(.*)\.(` + string(down) + `|` + string(up) + `)\.(.*)$`)
-
 type Bindata struct {
 	path        string
-	filesIndex  uintSlice
-	files       map[uint]map[direction]file
 	assetSource *AssetSource
+	migrations  *source.Migrations
 }
 
 func (b *Bindata) Open(url string) (source.Driver, error) {
@@ -59,35 +51,20 @@ func WithInstance(instance interface{}) (source.Driver, error) {
 	bn := &Bindata{
 		path:        "<go-bindata>",
 		assetSource: as,
+		migrations:  source.NewMigrations(),
 	}
 
-	// parse file names and create internal data structure
-	bn.files = make(map[uint]map[direction]file)
 	for _, fi := range as.Names {
-		pf, err := parseFilename(fi)
+		m, err := source.DefaultParse(fi)
 		if err != nil {
 			continue // ignore files that we can't parse
 		}
 
-		if bn.files[pf.version] == nil {
-			bn.files[pf.version] = make(map[direction]file)
+		if !bn.migrations.Append(m) {
+			return nil, fmt.Errorf("unable to parse file %v", fi)
 		}
-
-		// reject duplicate versions
-		if dupf, dup := bn.files[pf.version][pf.direction]; dup {
-			return nil, fmt.Errorf("duplicate file: %v and %v", dupf.filename, fi)
 	}
 
-		bn.files[pf.version][pf.direction] = *pf
-	}
-
-	// create index and sort
-	bn.filesIndex = make(uintSlice, 0)
-	for version, _ := range bn.files {
-		bn.filesIndex = append(bn.filesIndex, version)
-	}
-	sort.Sort(bn.filesIndex)
-
 	return bn, nil
 }
 
@@ -96,113 +73,47 @@ func (b *Bindata) Close() error {
 }
 
 func (b *Bindata) First() (version uint, err error) {
-	if len(b.filesIndex) == 0 {
+	if v, ok := b.migrations.First(); !ok {
 		return 0, &os.PathError{"first", b.path, os.ErrNotExist}
+	} else {
+		return v, nil
 	}
-	return b.filesIndex[0], nil
 }
 
 func (b *Bindata) Prev(version uint) (prevVersion uint, err error) {
-	pos := b.findPos(version)
-	if pos >= 1 && len(b.filesIndex) > pos-1 {
-		return b.filesIndex[pos-1], nil
-	}
+	if v, ok := b.migrations.Prev(version); !ok {
 		return 0, &os.PathError{fmt.Sprintf("prev for version %v", version), b.path, os.ErrNotExist}
+	} else {
+		return v, nil
+	}
 }
 
 func (b *Bindata) Next(version uint) (nextVersion uint, err error) {
-	pos := b.findPos(version)
-	if pos >= 0 && len(b.filesIndex) > pos+1 {
-		return b.filesIndex[pos+1], nil
-	}
+	if v, ok := b.migrations.Next(version); !ok {
 		return 0, &os.PathError{fmt.Sprintf("next for version %v", version), b.path, os.ErrNotExist}
+	} else {
+		return v, nil
+	}
 }
 
 func (b *Bindata) ReadUp(version uint) (r io.ReadCloser, identifier string, err error) {
-	if _, ok := b.files[version]; ok {
-		if upFile, ok := b.files[version][up]; ok {
-			body, err := b.assetSource.AssetFunc(upFile.filename)
+	if m, ok := b.migrations.Up(version); ok {
+		body, err := b.assetSource.AssetFunc(m.Raw)
 		if err != nil {
 			return nil, "", err
 		}
-			return ioutil.NopCloser(bytes.NewReader(body)), upFile.name, nil
-		}
+		return ioutil.NopCloser(bytes.NewReader(body)), m.Identifier, nil
 	}
 	return nil, "", &os.PathError{fmt.Sprintf("read version %v", version), b.path, os.ErrNotExist}
 }
 
 func (b *Bindata) ReadDown(version uint) (r io.ReadCloser, identifier string, err error) {
-	if _, ok := b.files[version]; ok {
-		if downFile, ok := b.files[version][down]; ok {
-			body, err := b.assetSource.AssetFunc(downFile.filename)
+	if m, ok := b.migrations.Down(version); ok {
+		body, err := b.assetSource.AssetFunc(m.Raw)
 		if err != nil {
 			return nil, "", err
 		}
-			return ioutil.NopCloser(bytes.NewReader(body)), downFile.name, nil
-		}
+		return ioutil.NopCloser(bytes.NewReader(body)), m.Identifier, nil
 	}
 	return nil, "", &os.PathError{fmt.Sprintf("read version %v", version), b.path, os.ErrNotExist}
 }
-
-// findPos finds the position of a file in the index
-// returns -1 if the version can't be found
-func (b *Bindata) findPos(version uint) int {
-	if len(b.filesIndex) > 0 {
-		for i, v := range b.filesIndex {
-			if v == version {
-				return i
-			}
-		}
-	}
-	return -1
-}
-
-// file contains parsed filename details
-type file struct {
-	version   uint
-	name      string
-	direction direction
-	extension string
-	filename  string
-}
-
-var errParseFilenameNoMatch = fmt.Errorf("no match")
-
-func parseFilename(filename string) (*file, error) {
-	m := filenameRegex.FindStringSubmatch(filename)
-	if len(m) == 5 {
-		versionUint64, err := strconv.ParseUint(m[1], 10, 32)
-		if err != nil {
-			return nil, err
-		}
-		return &file{
-			version:   uint(versionUint64),
-			name:      m[2],
-			direction: direction(m[3]),
-			extension: m[4],
-			filename:  filename,
-		}, nil
-	}
-	return nil, errParseFilenameNoMatch
-}
-
-type direction string
-
-const (
-	down direction = "down"
-	up             = "up"
-)
-
-type uintSlice []uint
-
-func (s uintSlice) Len() int {
-	return len(s)
-}
-
-func (s uintSlice) Swap(i, j int) {
-	s[i], s[j] = s[j], s[i]
-}
-
-func (s uintSlice) Less(i, j int) bool {
-	return s[i] < s[j]
-}

source/go-bindata/go-bindata_test.go

@@ -22,7 +22,7 @@ func Test(t *testing.T) {
 }
 
 func TestWithInstance(t *testing.T) {
-	// wrap assets into Resource first
+	// wrap assets into Resource
 	s := Resource(testdata.AssetNames(),
 		func(name string) ([]byte, error) {
 			return testdata.Asset(name)