update morph dependency (#19891)

vendor/github.com/mattermost/morph/sources/embedded/README.md

@@ -0,0 +1,73 @@
+# embedded source
+
+This source reads migrations from embedded  files, for example using
+[go-bindata](github.com/go-bindata/go-bindata) or go embed feature.
+
+## go embed usage
+
+To read the embedded data, create a migration source through the
+`WithInstance` method and then instantiate `morph`:
+
+```go
+import (
+	"embed"
+	"path/filepath"
+
+    "github.com/mattermost/morph"
+    "github.com/mattermost/morph/sources/embedded"
+)
+
+//go:embed testfiles
+var assets embed.FS
+
+func main() {
+	dirEntries, err := assets.ReadDir("testfiles")
+    if err != nil {
+        panic(err)
+    }
+
+	assetNames := make([]string, len(dirEntries))
+	for i, dirEntry := range dirEntries {
+		assetNames[i] = dirEntry.Name()
+	}
+
+    res := embedded.Resource(assetNames, func(name string) ([]byte, error) {
+		return assets.ReadFile(filepath.Join("testfiles", name))
+    })
+
+    src, err := embedded.WithInstance(res)
+    if err != nil {
+        panic(err)
+    }
+
+    // create the morph instance from the source and driver
+    m := morph.NewFromConnURL("postgres://...", src, opts)
+}
+```
+
+## go-bindata usage
+
+To read the embedded data, create a migration source through the
+`WithInstance` method and then instantiate `morph`:
+
+```go
+import (
+    "github.com/mattermost/morph"
+    "github.com/mattermost/morph/sources/embedded"
+    "github.com/mattermost/morph/sources/embedded/testdata"
+)
+
+func main() {
+    res := embedded.Resource(testdata.AssetNames(), func(name string) ([]byte, error) {
+        return testdata.Asset(name)
+    })
+
+    src, err := embedded.WithInstance(res)
+    if err != nil {
+        panic(err)
+    }
+
+    // create the morph instance from the source and driver
+    m := morph.NewFromConnURL("postgres://...", src, opts)
+}
+```

vendor/github.com/mattermost/morph/sources/embedded/embedded.go

@@ -0,0 +1,56 @@
+package embedded
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/mattermost/morph/models"
+	"github.com/mattermost/morph/sources"
+)
+
+type AssetFunc func(name string) ([]byte, error)
+
+func Resource(names []string, fn AssetFunc) *AssetSource {
+	return &AssetSource{
+		Names:     names,
+		AssetFunc: fn,
+	}
+}
+
+type AssetSource struct {
+	Names     []string
+	AssetFunc AssetFunc
+}
+
+type Embedded struct {
+	assetSource *AssetSource
+	migrations  []*models.Migration
+}
+
+func WithInstance(assetSource *AssetSource) (sources.Source, error) {
+	b := &Embedded{
+		assetSource: assetSource,
+		migrations:  []*models.Migration{},
+	}
+
+	for _, filename := range assetSource.Names {
+		migrationBytes, err := b.assetSource.AssetFunc(filename)
+		if err != nil {
+			return nil, fmt.Errorf("cannot read migration %q: %w", filename, err)
+		}
+
+		m, err := models.NewMigration(ioutil.NopCloser(bytes.NewReader(migrationBytes)), filename)
+		if err != nil {
+			return nil, fmt.Errorf("could not create migration: %w", err)
+		}
+
+		b.migrations = append(b.migrations, m)
+	}
+
+	return b, nil
+}
+
+func (b *Embedded) Migrations() []*models.Migration {
+	return b.migrations
+}