1 files changed, 241 insertions, 0 deletions
diff --git a/vendor/github.com/gobuffalo/packr/box.go b/vendor/github.com/gobuffalo/packr/box.go
new file mode 100644
index 0000000..30eb6e2
--- /dev/null
+++ b/vendor/github.com/gobuffalo/packr/box.go
@@ -0,0 +1,241 @@
+package packr
+
+import (
+	"bytes"
+	"compress/gzip"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+var (
+	ErrResOutsideBox = errors.New("Can't find a resource outside the box")
+)
+
+// NewBox returns a Box that can be used to
+// retrieve files from either disk or the embedded
+// binary.
+func NewBox(path string) Box {
+	var cd string
+	if !filepath.IsAbs(path) {
+		_, filename, _, _ := runtime.Caller(1)
+		cd = filepath.Dir(filename)
+	}
+
+	// this little hack courtesy of the `-cover` flag!!
+	cov := filepath.Join("_test", "_obj_test")
+	cd = strings.Replace(cd, string(filepath.Separator)+cov, "", 1)
+	if !filepath.IsAbs(cd) && cd != "" {
+		cd = filepath.Join(GoPath(), "src", cd)
+	}
+
+	return Box{
+		Path:       path,
+		callingDir: cd,
+		data:       map[string][]byte{},
+	}
+}
+
+// Box represent a folder on a disk you want to
+// have access to in the built Go binary.
+type Box struct {
+	Path        string
+	callingDir  string
+	data        map[string][]byte
+	directories map[string]bool
+}
+
+func (b Box) AddString(path string, t string) {
+	b.AddBytes(path, []byte(t))
+}
+
+func (b Box) AddBytes(path string, t []byte) {
+	b.data[path] = t
+}
+
+// String of the file asked for or an empty string.
+func (b Box) String(name string) string {
+	return string(b.Bytes(name))
+}
+
+// MustString returns either the string of the requested
+// file or an error if it can not be found.
+func (b Box) MustString(name string) (string, error) {
+	bb, err := b.MustBytes(name)
+	return string(bb), err
+}
+
+// Bytes of the file asked for or an empty byte slice.
+func (b Box) Bytes(name string) []byte {
+	bb, _ := b.MustBytes(name)
+	return bb
+}
+
+// MustBytes returns either the byte slice of the requested
+// file or an error if it can not be found.
+func (b Box) MustBytes(name string) ([]byte, error) {
+	f, err := b.find(name)
+	if err == nil {
+		bb := &bytes.Buffer{}
+		bb.ReadFrom(f)
+		return bb.Bytes(), err
+	}
+	return nil, err
+}
+
+// Has returns true if the resource exists in the box
+func (b Box) Has(name string) bool {
+	_, err := b.find(name)
+	if err != nil {
+		return false
+	}
+	return true
+}
+
+func (b Box) decompress(bb []byte) []byte {
+	reader, err := gzip.NewReader(bytes.NewReader(bb))
+	if err != nil {
+		return bb
+	}
+	data, err := ioutil.ReadAll(reader)
+	if err != nil {
+		return bb
+	}
+	return data
+}
+
+func (b Box) find(name string) (File, error) {
+	if bb, ok := b.data[name]; ok {
+		return newVirtualFile(name, bb), nil
+	}
+	if b.directories == nil {
+		b.indexDirectories()
+	}
+
+	cleanName := filepath.ToSlash(filepath.Clean(name))
+	// Ensure name is not outside the box
+	if strings.HasPrefix(cleanName, "../") {
+		return nil, ErrResOutsideBox
+	}
+	// Absolute name is considered as relative to the box root
+	cleanName = strings.TrimPrefix(cleanName, "/")
+
+	// Try to get the resource from the box
+	if _, ok := data[b.Path]; ok {
+		if bb, ok := data[b.Path][cleanName]; ok {
+			bb = b.decompress(bb)
+			return newVirtualFile(cleanName, bb), nil
+		}
+		if filepath.Ext(cleanName) != "" {
+			// The Handler created by http.FileSystem checks for those errors and
+			// returns http.StatusNotFound instead of http.StatusInternalServerError.
+			return nil, os.ErrNotExist
+		}
+		if _, ok := b.directories[cleanName]; ok {
+			return newVirtualDir(cleanName), nil
+		}
+		return nil, os.ErrNotExist
+	}
+
+	// Not found in the box virtual fs, try to get it from the file system
+	cleanName = filepath.FromSlash(cleanName)
+	p := filepath.Join(b.callingDir, b.Path, cleanName)
+	return fileFor(p, cleanName)
+}
+
+type WalkFunc func(string, File) error
+
+func (b Box) Walk(wf WalkFunc) error {
+	if data[b.Path] == nil {
+		base, err := filepath.EvalSymlinks(filepath.Join(b.callingDir, b.Path))
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		return filepath.Walk(base, func(path string, info os.FileInfo, err error) error {
+			cleanName, err := filepath.Rel(base, path)
+			if err != nil {
+				cleanName = strings.TrimPrefix(path, base)
+			}
+			cleanName = filepath.ToSlash(filepath.Clean(cleanName))
+			cleanName = strings.TrimPrefix(cleanName, "/")
+			cleanName = filepath.FromSlash(cleanName)
+			if info == nil || info.IsDir() {
+				return nil
+			}
+
+			file, err := fileFor(path, cleanName)
+			if err != nil {
+				return err
+			}
+			return wf(cleanName, file)
+		})
+	}
+	for n := range data[b.Path] {
+		f, err := b.find(n)
+		if err != nil {
+			return err
+		}
+		err = wf(n, f)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Open returns a File using the http.File interface
+func (b Box) Open(name string) (http.File, error) {
+	return b.find(name)
+}
+
+// List shows "What's in the box?"
+func (b Box) List() []string {
+	var keys []string
+
+	if b.data == nil || len(b.data) == 0 {
+		b.Walk(func(path string, info File) error {
+			finfo, _ := info.FileInfo()
+			if !finfo.IsDir() {
+				keys = append(keys, finfo.Name())
+			}
+			return nil
+		})
+	} else {
+		for k := range b.data {
+			keys = append(keys, k)
+		}
+	}
+	return keys
+}
+
+func (b *Box) indexDirectories() {
+	b.directories = map[string]bool{}
+	if _, ok := data[b.Path]; ok {
+		for name := range data[b.Path] {
+			prefix, _ := path.Split(name)
+			// Even on Windows the suffix appears to be a /
+			prefix = strings.TrimSuffix(prefix, "/")
+			b.directories[prefix] = true
+		}
+	}
+}
+
+func fileFor(p string, name string) (File, error) {
+	fi, err := os.Stat(p)
+	if err != nil {
+		return nil, err
+	}
+	if fi.IsDir() {
+		return newVirtualDir(p), nil
+	}
+	if bb, err := ioutil.ReadFile(p); err == nil {
+		return newVirtualFile(name, bb), nil
+	}
+	return nil, os.ErrNotExist
+}