snapshot of https://github.com/golang-migrate/migrate.git (master, 2026-09-15; blobs > 131072B omitted)

source/godoc_vfs/vfs.go

@@ -0,0 +1,56 @@
+// Package godoc_vfs contains a driver that reads migrations from a virtual file
+// system.
+//
+// Implementations of the filesystem interface that read from zip files and
+// maps, as well as the definition of the filesystem interface can be found in
+// the golang.org/x/tools/godoc/vfs package.
+package godoc_vfs
+
+import (
+	"github.com/golang-migrate/migrate/v4/source"
+	"github.com/golang-migrate/migrate/v4/source/httpfs"
+
+	"golang.org/x/tools/godoc/vfs"
+	vfs_httpfs "golang.org/x/tools/godoc/vfs/httpfs"
+)
+
+func init() {
+	source.Register("godoc-vfs", &VFS{})
+}
+
+// VFS is an implementation of driver that returns migrations from a virtual
+// file system.
+type VFS struct {
+	httpfs.PartialDriver
+	fs   vfs.FileSystem
+	path string
+}
+
+// Open implements the source.Driver interface for VFS.
+//
+// Calling this function panics, instead use the WithInstance function.
+// See the package level documentation for an example.
+func (b *VFS) Open(url string) (source.Driver, error) {
+	panic("not implemented")
+}
+
+// WithInstance creates a new driver from a virtual file system.
+// If a tree named searchPath exists in the virtual filesystem, WithInstance
+// searches for migration files there.
+// It defaults to "/".
+func WithInstance(fs vfs.FileSystem, searchPath string) (source.Driver, error) {
+	if searchPath == "" {
+		searchPath = "/"
+	}
+
+	bn := &VFS{
+		fs:   fs,
+		path: searchPath,
+	}
+
+	if err := bn.Init(vfs_httpfs.New(fs), searchPath); err != nil {
+		return nil, err
+	}
+
+	return bn, nil
+}