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https://github.com/alexkohler/unimport
unimport is a Go static analysis tool to find unnecessary import aliases.
https://github.com/alexkohler/unimport
go golang static-analysis static-analyzer static-code-analysis
Last synced: about 1 month ago
JSON representation
unimport is a Go static analysis tool to find unnecessary import aliases.
- Host: GitHub
- URL: https://github.com/alexkohler/unimport
- Owner: alexkohler
- License: mit
- Created: 2017-10-22T16:08:21.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2017-11-06T22:33:09.000Z (about 7 years ago)
- Last Synced: 2024-08-03T23:30:13.848Z (5 months ago)
- Topics: go, golang, static-analysis, static-analyzer, static-code-analysis
- Language: Go
- Size: 14.6 KB
- Stars: 68
- Watchers: 4
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-golang-repositories - unimport
README
# unimport
unimport is a Go static analysis tool to find unnecessary import aliases.
## Installation
go get -u github.com/alexkohler/unimport
## Usage
Similar to other Go static anaylsis tools (such as golint, go vet) , unimport can be invoked with one or more filenames, directories, or packages named by its import path. Unimport also supports the `...` wildcard.
unimport files/directories/packages
Currently, no flag are supported. A `-w` flag may be added in the future to automatically remove aliases where possible (Similar to [gofmt's -w flag](https://golang.org/cmd/gofmt/)).
## Purpose
As noted in Go's [Code Review comments](https://github.com/golang/go/wiki/CodeReviewComments#imports):
> Avoid renaming imports except to avoid a name collision; good package names should not require renaming.
> In the event of collision, prefer to rename the most local or project-specific import.
This tool will check if any import aliases are truly needed (by ensuring there is a name collision that would exist without the import alias). This tool _will_ ignore import paths containing dashes and dots, as these are generally useful aliases while importing a specific revision. For example, in [gometalinter](https://github.com/alecthomas/gometalinter), there are some imports like `kingpin "gopkg.in/alecthomas/kingpin.v3-unstable"`. This is a reasonable import alias and will not be flagged.
## Example
Running `unimports` on the [Go source](https://github.com/golang/go):
```
$ unimport $GOROOT/src/...
cmd/go/pkg.go:18 unnecessary import alias pathpkg
go/build/build.go:19 unnecessary import alias pathpkg
go/internal/gcimporter/gcimporter.go:23 unnecessary import alias exact
os/pipe_test.go:14 unnecessary import alias osexec
os/os_windows_test.go:10 unnecessary import alias osexec
```
Below are some of the arguably unneeded import aliases it found:
```Go
// go/internal/gcimporter/gcimporter.go
import (
"bufio"
"errors"
"fmt"
"go/build"
"go/token"
"io"
"io/ioutil"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"text/scanner"
exact "go/constant"
"go/types"
)
// os/pipe_test.go.go
import (
"fmt"
"internal/testenv"
"os"
osexec "os/exec"
"os/signal"
"syscall"
"testing"
)
```
## TODO
- Unit tests
- Flagging of packages that contain an uppercase letter or underscore
- -w flag to write changes to file where/if possible
- Globbing support (e.g. unimport *.go)
## Contributing
Pull requests welcome!
- [nakedret](https://github.com/alexkohler/nakedret) - Finds naked returns.
- [prealloc](https://github.com/alexkohler/prealloc) - Finds slice declarations that could potentially be preallocated.