when the package name is different form import name it can't work?

[zboya]

package main

import (
    "net/http"

    "github.com/googollee/go-socket.io"
    "listome.com/log"
)

func main() {
    server, err := socketio.NewServer(nil)
    if err != nil {
        log.Fatal(err)
    }
    server.On("connection", func(so socketio.Socket) {
        log.Info("on connection")
        so.Join("paint_game")

        so.On("paint", func(msg string) {
            // log.Info("painting:", msg)
            log.Info("broadcast:", so.BroadcastTo("paint_game", "painting", msg))
        })
        so.On("disconnection", func() {
            log.Info("on disconnect")
        })
    })
    server.On("error", func(so socketio.Socket, err error) {
        log.Error("error:", err)
    })

    http.Handle("/socket.io/", server)
    http.Handle("/", http.FileServer(http.Dir("./")))
    log.Info("Serving at localhost:5000...")
    log.Fatal(http.ListenAndServe(":5000", nil))

}

godef -f main.go 'socketio.NewServer'
parseLocalPackage error: no more package files found
godef: no declaration found for socketio.NewServer

when I add import name,

package main

import (
    "net/http"

    socketio "github.com/googollee/go-socket.io"
    "listome.com/log"
)

func main() {
    server, err := socketio.NewServer(nil)
    if err != nil {
        log.Fatal(err)
    }
    server.On("connection", func(so socketio.Socket) {
        log.Info("on connection")
        so.Join("paint_game")

        so.On("paint", func(msg string) {
            // log.Info("painting:", msg)
            log.Info("broadcast:", so.BroadcastTo("paint_game", "painting", msg))
        })
        so.On("disconnection", func() {
            log.Info("on disconnect")
        })
    })
    server.On("error", func(so socketio.Socket, err error) {
        log.Error("error:", err)
    })

    http.Handle("/socket.io/", server)
    http.Handle("/", http.FileServer(http.Dir("./")))
    log.Info("Serving at localhost:5000...")
    log.Fatal(http.ListenAndServe(":5000", nil))

}

godef -f main.go 'socketio.NewServer'
/home/lstbao/work/listomego/src/github.com/googollee/go-socket.io/server.go:17:6

It can work well.

[rogpeppe]

Interesting. Running godef on the NewServer instance in the source (cat main.go | def -o 150) works OK but when specifying the expression on the command line, it does not.