1 files changed, 252 insertions, 0 deletions
diff --git a/vendor/github.com/GeertJohan/go.rice/virtual.go b/vendor/github.com/GeertJohan/go.rice/virtual.go
new file mode 100644
index 00000000..50bff167
--- /dev/null
+++ b/vendor/github.com/GeertJohan/go.rice/virtual.go
@@ -0,0 +1,252 @@
+package rice
+
+import (
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+
+	"github.com/GeertJohan/go.rice/embedded"
+)
+
+//++ TODO: IDEA: merge virtualFile and virtualDir, this decreases work done by rice.File
+
+// Error indicating some function is not implemented yet (but available to satisfy an interface)
+var ErrNotImplemented = errors.New("not implemented yet")
+
+// virtualFile is a 'stateful' virtual file.
+// virtualFile wraps an *EmbeddedFile for a call to Box.Open() and virtualizes 'read cursor' (offset) and 'closing'.
+// virtualFile is only internally visible and should be exposed through rice.File
+type virtualFile struct {
+	*embedded.EmbeddedFile       // the actual embedded file, embedded to obtain methods
+	offset                 int64 // read position on the virtual file
+	closed                 bool  // closed when true
+}
+
+// create a new virtualFile for given EmbeddedFile
+func newVirtualFile(ef *embedded.EmbeddedFile) *virtualFile {
+	vf := &virtualFile{
+		EmbeddedFile: ef,
+		offset:       0,
+		closed:       false,
+	}
+	return vf
+}
+
+//++ TODO check for nil pointers in all these methods. When so: return os.PathError with Err: os.ErrInvalid
+
+func (vf *virtualFile) close() error {
+	if vf.closed {
+		return &os.PathError{
+			Op:   "close",
+			Path: vf.EmbeddedFile.Filename,
+			Err:  errors.New("already closed"),
+		}
+	}
+	vf.EmbeddedFile = nil
+	vf.closed = true
+	return nil
+}
+
+func (vf *virtualFile) stat() (os.FileInfo, error) {
+	if vf.closed {
+		return nil, &os.PathError{
+			Op:   "stat",
+			Path: vf.EmbeddedFile.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	return (*embeddedFileInfo)(vf.EmbeddedFile), nil
+}
+
+func (vf *virtualFile) readdir(count int) ([]os.FileInfo, error) {
+	if vf.closed {
+		return nil, &os.PathError{
+			Op:   "readdir",
+			Path: vf.EmbeddedFile.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	//TODO: return proper error for a readdir() call on a file
+	return nil, ErrNotImplemented
+}
+
+func (vf *virtualFile) read(bts []byte) (int, error) {
+	if vf.closed {
+		return 0, &os.PathError{
+			Op:   "read",
+			Path: vf.EmbeddedFile.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+
+	end := vf.offset + int64(len(bts))
+
+	if end >= int64(len(vf.Content)) {
+		// end of file, so return what we have + EOF
+		n := copy(bts, vf.Content[vf.offset:])
+		vf.offset = 0
+		return n, io.EOF
+	}
+
+	n := copy(bts, vf.Content[vf.offset:end])
+	vf.offset += int64(n)
+	return n, nil
+
+}
+
+func (vf *virtualFile) seek(offset int64, whence int) (int64, error) {
+	if vf.closed {
+		return 0, &os.PathError{
+			Op:   "seek",
+			Path: vf.EmbeddedFile.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	var e error
+
+	//++ TODO: check if this is correct implementation for seek
+	switch whence {
+	case os.SEEK_SET:
+		//++ check if new offset isn't out of bounds, set e when it is, then break out of switch
+		vf.offset = offset
+	case os.SEEK_CUR:
+		//++ check if new offset isn't out of bounds, set e when it is, then break out of switch
+		vf.offset += offset
+	case os.SEEK_END:
+		//++ check if new offset isn't out of bounds, set e when it is, then break out of switch
+		vf.offset = int64(len(vf.EmbeddedFile.Content)) - offset
+	}
+
+	if e != nil {
+		return 0, &os.PathError{
+			Op:   "seek",
+			Path: vf.Filename,
+			Err:  e,
+		}
+	}
+
+	return vf.offset, nil
+}
+
+// virtualDir is a 'stateful' virtual directory.
+// virtualDir wraps an *EmbeddedDir for a call to Box.Open() and virtualizes 'closing'.
+// virtualDir is only internally visible and should be exposed through rice.File
+type virtualDir struct {
+	*embedded.EmbeddedDir
+	offset int // readdir position on the directory
+	closed bool
+}
+
+// create a new virtualDir for given EmbeddedDir
+func newVirtualDir(ed *embedded.EmbeddedDir) *virtualDir {
+	vd := &virtualDir{
+		EmbeddedDir: ed,
+		offset:      0,
+		closed:      false,
+	}
+	return vd
+}
+
+func (vd *virtualDir) close() error {
+	//++ TODO: needs sync mutex?
+	if vd.closed {
+		return &os.PathError{
+			Op:   "close",
+			Path: vd.EmbeddedDir.Filename,
+			Err:  errors.New("already closed"),
+		}
+	}
+	vd.closed = true
+	return nil
+}
+
+func (vd *virtualDir) stat() (os.FileInfo, error) {
+	if vd.closed {
+		return nil, &os.PathError{
+			Op:   "stat",
+			Path: vd.EmbeddedDir.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	return (*embeddedDirInfo)(vd.EmbeddedDir), nil
+}
+
+func (vd *virtualDir) readdir(n int) (fi []os.FileInfo, err error) {
+
+	if vd.closed {
+		return nil, &os.PathError{
+			Op:   "readdir",
+			Path: vd.EmbeddedDir.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+
+	// Build up the array of our contents
+	var files []os.FileInfo
+
+	// Add the child directories
+	for _, child := range vd.ChildDirs {
+		child.Filename = filepath.Base(child.Filename)
+		files = append(files, (*embeddedDirInfo)(child))
+	}
+
+	// Add the child files
+	for _, child := range vd.ChildFiles {
+		child.Filename = filepath.Base(child.Filename)
+		files = append(files, (*embeddedFileInfo)(child))
+	}
+
+	// Sort it by filename (lexical order)
+	sort.Sort(SortByName(files))
+
+	// Return all contents if that's what is requested
+	if n <= 0 {
+		vd.offset = 0
+		return files, nil
+	}
+
+	// If user has requested past the end of our list
+	// return what we can and send an EOF
+	if vd.offset+n >= len(files) {
+		offset := vd.offset
+		vd.offset = 0
+		return files[offset:], io.EOF
+	}
+
+	offset := vd.offset
+	vd.offset += n
+	return files[offset : offset+n], nil
+
+}
+
+func (vd *virtualDir) read(bts []byte) (int, error) {
+	if vd.closed {
+		return 0, &os.PathError{
+			Op:   "read",
+			Path: vd.EmbeddedDir.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	return 0, &os.PathError{
+		Op:   "read",
+		Path: vd.EmbeddedDir.Filename,
+		Err:  errors.New("is a directory"),
+	}
+}
+
+func (vd *virtualDir) seek(offset int64, whence int) (int64, error) {
+	if vd.closed {
+		return 0, &os.PathError{
+			Op:   "seek",
+			Path: vd.EmbeddedDir.Filename,
+			Err:  errors.New("bad file descriptor"),
+		}
+	}
+	return 0, &os.PathError{
+		Op:   "seek",
+		Path: vd.Filename,
+		Err:  errors.New("is a directory"),
+	}
+}