Giant blob of minor changes

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201028153306-37f0764111ff / godoc / vfs / os.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/godoc/vfs/os.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/godoc/vfs/os.go
new file mode 100644 (file)
index 0000000..35d0509
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/godoc/vfs/os.go
@@ -0,0 +1,105 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package vfs
+
+import (
+       "fmt"
+       "go/build"
+       "io/ioutil"
+       "os"
+       pathpkg "path"
+       "path/filepath"
+       "runtime"
+)
+
+// We expose a new variable because otherwise we need to copy the findGOROOT logic again
+// from cmd/godoc which is already copied twice from the standard library.
+
+// GOROOT is the GOROOT path under which the godoc binary is running.
+// It is needed to check whether a filesystem root is under GOROOT or not.
+// This is set from cmd/godoc/main.go.
+var GOROOT = runtime.GOROOT()
+
+// OS returns an implementation of FileSystem reading from the
+// tree rooted at root.  Recording a root is convenient everywhere
+// but necessary on Windows, because the slash-separated path
+// passed to Open has no way to specify a drive letter.  Using a root
+// lets code refer to OS(`c:\`), OS(`d:\`) and so on.
+func OS(root string) FileSystem {
+       var t RootType
+       switch {
+       case root == GOROOT:
+               t = RootTypeGoRoot
+       case isGoPath(root):
+               t = RootTypeGoPath
+       }
+       return osFS{rootPath: root, rootType: t}
+}
+
+type osFS struct {
+       rootPath string
+       rootType RootType
+}
+
+func isGoPath(path string) bool {
+       for _, bp := range filepath.SplitList(build.Default.GOPATH) {
+               for _, gp := range filepath.SplitList(path) {
+                       if bp == gp {
+                               return true
+                       }
+               }
+       }
+       return false
+}
+
+func (root osFS) String() string { return "os(" + root.rootPath + ")" }
+
+// RootType returns the root type for the filesystem.
+//
+// Note that we ignore the path argument because roottype is a property of
+// this filesystem. But for other filesystems, the roottype might need to be
+// dynamically deduced at call time.
+func (root osFS) RootType(path string) RootType {
+       return root.rootType
+}
+
+func (root osFS) resolve(path string) string {
+       // Clean the path so that it cannot possibly begin with ../.
+       // If it did, the result of filepath.Join would be outside the
+       // tree rooted at root.  We probably won't ever see a path
+       // with .. in it, but be safe anyway.
+       path = pathpkg.Clean("/" + path)
+
+       return filepath.Join(root.rootPath, path)
+}
+
+func (root osFS) Open(path string) (ReadSeekCloser, error) {
+       f, err := os.Open(root.resolve(path))
+       if err != nil {
+               return nil, err
+       }
+       fi, err := f.Stat()
+       if err != nil {
+               f.Close()
+               return nil, err
+       }
+       if fi.IsDir() {
+               f.Close()
+               return nil, fmt.Errorf("Open: %s is a directory", path)
+       }
+       return f, nil
+}
+
+func (root osFS) Lstat(path string) (os.FileInfo, error) {
+       return os.Lstat(root.resolve(path))
+}
+
+func (root osFS) Stat(path string) (os.FileInfo, error) {
+       return os.Stat(root.resolve(path))
+}
+
+func (root osFS) ReadDir(path string) ([]os.FileInfo, error) {
+       return ioutil.ReadDir(root.resolve(path)) // is sorted
+}