--- /dev/null
+// Copyright 2019 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 imports implements a Go pretty-printer (like package "go/format")
+// that also adds or removes import statements as necessary.
+package imports // import "golang.org/x/tools/imports"
+
+import (
+ "io/ioutil"
+ "log"
+
+ "golang.org/x/tools/internal/gocommand"
+ intimp "golang.org/x/tools/internal/imports"
+)
+
+// Options specifies options for processing files.
+type Options struct {
+ Fragment bool // Accept fragment of a source file (no package statement)
+ AllErrors bool // Report all errors (not just the first 10 on different lines)
+
+ Comments bool // Print comments (true if nil *Options provided)
+ TabIndent bool // Use tabs for indent (true if nil *Options provided)
+ TabWidth int // Tab width (8 if nil *Options provided)
+
+ FormatOnly bool // Disable the insertion and deletion of imports
+}
+
+// Debug controls verbose logging.
+var Debug = false
+
+// LocalPrefix is a comma-separated string of import path prefixes, which, if
+// set, instructs Process to sort the import paths with the given prefixes
+// into another group after 3rd-party packages.
+var LocalPrefix string
+
+// Process formats and adjusts imports for the provided file.
+// If opt is nil the defaults are used, and if src is nil the source
+// is read from the filesystem.
+//
+// Note that filename's directory influences which imports can be chosen,
+// so it is important that filename be accurate.
+// To process data ``as if'' it were in filename, pass the data as a non-nil src.
+func Process(filename string, src []byte, opt *Options) ([]byte, error) {
+ var err error
+ if src == nil {
+ src, err = ioutil.ReadFile(filename)
+ if err != nil {
+ return nil, err
+ }
+ }
+ if opt == nil {
+ opt = &Options{Comments: true, TabIndent: true, TabWidth: 8}
+ }
+ intopt := &intimp.Options{
+ Env: &intimp.ProcessEnv{
+ GocmdRunner: &gocommand.Runner{},
+ },
+ LocalPrefix: LocalPrefix,
+ AllErrors: opt.AllErrors,
+ Comments: opt.Comments,
+ FormatOnly: opt.FormatOnly,
+ Fragment: opt.Fragment,
+ TabIndent: opt.TabIndent,
+ TabWidth: opt.TabWidth,
+ }
+ if Debug {
+ intopt.Env.Logf = log.Printf
+ }
+ return intimp.Process(filename, src, intopt)
+}
+
+// VendorlessPath returns the devendorized version of the import path ipath.
+// For example, VendorlessPath("foo/bar/vendor/a/b") returns "a/b".
+func VendorlessPath(ipath string) string {
+ return intimp.VendorlessPath(ipath)
+}