easyjson is not so vendor friendly

[garukun]

Consider the following code:

import "github.com/repo1/package2"

//easyjson:json
type Gen1 struct {
  A package2.Type1 `json:"a"`
}

Given that github.com/repo1/package2 is already vendored, e.g. there is a vendor/github.com/repo1/package2 directory along with the go source code above. Running the easyjson binary will create an import line that looks somelike:

import package2 "github.com/foo/bar/vendor/github.com/repo1/package2"

Instead, it should just be:

import package2 "github.com/repo1/package2"

My go env just FYI:

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/stevejiang/developments/go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.6.2/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.6.2/libexec/pkg/tool/darwin_amd64"
GO15VENDOREXPERIMENT="1"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fno-common"
CXX="clang++"
CGO_ENABLED="1"

[luma]

I see a partial fix was applied in #65 but you'll also need to do the same on the path returned by parser.getPkgPath. See the pgk below for the kind of output I get when running easyjson on vendor'd go code.

I'm happy to prepare a PR if the above sounds like the right fix.

package main

import (
  "fmt"
  "os"

  "github.com/mailru/easyjson/gen"

  pkg "github.com/foo/bar/vendor/github.com/foo/baz"
)

func main() {
  g := gen.NewGenerator("banks.pb_easyjson.go")
  g.SetPkg("protocol", "github.com/foo/bar/vendor/github.com/foo/baz")
  g.Add(pkg.EasyJSON_exporter_Thing(nil))
  if err := g.Run(os.Stdout); err != nil {
    fmt.Fprintln(os.Stderr, err)
    os.Exit(1)
  }
}