gonel

How to install

Warning: you need goimports installed.

Using go get:

go get github.com/xrash/gonel/cmd/gonel

Manually compiling:

$ git clone https://github.com/xrash/gonel.git
$ cd gonel
$ make
$ sudo cp bin/gonel /usr/local/bin

Usage:
  gonel [flags]

  Flags:
    -h, --help                 help for gonel
    -i, --import stringArray   package name to import

$ gonel "fmt.Println(123)"
123

$ gonel "fmt.Println(333)" "fmt.Println(999)"
333
999

$ gonel 'fmt.Println(123)
> fmt.Println(333)
> fmt.Println(999)'
123
333
999

You must have goimports installed in your machine.
gonel will automatically import your packages using goimports, so you can write code as if you were inside main() with everything set up already.
If you still need to explicitly import a package, use the flag -i, like this: $ gonel -i fmt -i math 'fmt.Println(math.Max(20, 30))'.
You can use multiple lines/pieces of code as multiple arguments, or just break lines in the same argument.
STDIN passed to gonel will be forwarded to the program, so you'll be able to access it through os.Stdin.