goimports-wasabi

This is a fork of goimports, inspired by the gosimports project. goimports-wasabi also tries to solve the import grouping/ordering problem, but in a different way.

Overview

goimports and gosimports have the following issues (as of 2022/11).

• goimports doesn't sort import specs deterministically.
• goimports doesn't treat comments associated with import specs properly.
• goimports doesn't work well for artificial inputs.
• gosimports removes comments associated with import specs.

goimports-wasabi is designed to work deterministically with any valid input, leaving as many comments as possible in the (supposedly) correct place.

Installation

go install github.com/homuler/goimports-wasabi@latest

Examples

Grouping/Ordering Problem

Input

import (
	// doc comment for fmt
	"fmt"

	/*
	 * block comments
	 */

	 // doc comment for foo
	"github.com/homuler/foo"
	"context"
	// footer comment (maybe for context)

	"strings" // line comment for strings

	b "github.com/homuler/bar"

	_ "runtime/pprof" // line comment for pprof
)

Output

import (
	"context"
	// footer comment (maybe for context)

	// doc comment for fmt
	"fmt"
	_ "runtime/pprof" // line comment for pprof
	"strings"         // line comment for strings

	/*
	 * block comments
	 */

	b "github.com/homuler/bar"
	// doc comment for foo
	"github.com/homuler/foo"
)

goimports

import (
	// doc comment for fmt
	"fmt"

	/*
	 * block comments
	 */

	// doc comment for foo
	"context"

	"github.com/homuler/foo"

	// footer comment (maybe for context)

	"strings" // line comment for strings

	b "github.com/homuler/bar"

	_ "runtime/pprof" // line comment for pprof
)

Merging Problem

Input

// doc comment for fmt
import "fmt"

// doc comment for context
import "context"

// doc comment
import (
	// doc comment for errors
	"errors"
)

Output

goimports-wasabi

// doc comment
import (
	// doc comment for context
	"context"
	// doc comment for errors
	"errors"
	// doc comment for fmt
	"fmt"
)

goimports

// doc comment for fmt
import (
	"context"
	"errors"
	"fmt"
)

// doc comment for context

// doc comment

// doc comment for errors

Unusual Input

Input

import ("fmt";"fmt";"context";"github.com/homuler/foo")

Output

goimports-wasabi -format-only

import (
	"context"
	"fmt"

	"github.com/homuler/foo"
)

goimports -format-only

panic: invalid line number 2 (should be < 2)

License

BSD-3-Clause

Copyright (c) 2009 The Go Authors. All rights reserved.