diff --git a/copy.go b/copy.go new file mode 100644 index 0000000..67ccc5f --- /dev/null +++ b/copy.go @@ -0,0 +1,99 @@ +package goutil + +/* +Copied from https://github.com/otiai10/copy and slightly altered. + +The MIT License (MIT) + +Copyright (c) 2018 otiai10 + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +import ( + "io" + "io/ioutil" + "os" + "path/filepath" +) + +// Copy copies src to dest, doesn't matter if src is a directory or a file +func Copy(src, dest string) error { + info, err := os.Lstat(src) + if err != nil { + return err + } + return copy(src, dest, info) +} + +func copy(src, dest string, info os.FileInfo) error { + if info.Mode()&os.ModeSymlink != 0 { + return linkcopy(src, dest, info) + } + if info.IsDir() { + return dircopy(src, dest, info) + } + return filecopy(src, dest, info) +} + +func filecopy(src, dest string, info os.FileInfo) error { + if err := os.MkdirAll(filepath.Dir(dest), os.ModePerm); err != nil { + return err + } + f, err := os.Create(dest) + if err != nil { + return err + } + defer f.Close() + if err = os.Chmod(f.Name(), info.Mode()); err != nil { + return err + } + s, err := os.Open(src) + if err != nil { + return err + } + defer s.Close() + _, err = io.Copy(f, s) + return err +} + +func dircopy(srcdir, destdir string, info os.FileInfo) error { + if err := os.MkdirAll(destdir, info.Mode()); err != nil { + return err + } + contents, err := ioutil.ReadDir(srcdir) + if err != nil { + return err + } + for _, content := range contents { + cs, cd := filepath.Join(srcdir, content.Name()), filepath.Join(destdir, content.Name()) + if err := copy(cs, cd, content); err != nil { + return err + } + } + return nil +} + +func linkcopy(src, dest string, info os.FileInfo) error { + src, err := os.Readlink(src) + if err != nil { + return err + } + return os.Symlink(src, dest) +}