same x-go-type in aresponse and schemas results in double entry in imports

[davidn]

Test case:

foji.yaml:

files:
  api:
    files:
      - "api.yaml"
processes:
  openAPI:
    params:
      Package: "main"
    OpenAPIFile:
      handlers_gen.go: foji/openapi/handler.go.tpl

api.yaml:

openapi: 3.0.1
paths:
  /:
    get:
      operationId: get
      responses:
        200:
          content:
            application/json:
              schema:
                type: object
                x-go-type: encoding/json.RawMessage
components:
  schemas:
    s:
      type: object
      properties:
        value:
          type: object
          x-go-type: encoding/json.RawMessage

Results in the following handlers_gen.go:

// Code generated by foji, template: foji/openapi/handler.go.tpl; DO NOT EDIT.

package main

import (
	"context"
	"encoding/json"
	"net/http"

	"encoding/json"

	"github.com/bir/iken/httputil"
	"github.com/bir/iken/logctx"
)

type Operations interface {
	Get(ctx context.Context) (*json.RawMessage, error)
}

type OpenAPIHandlers struct {
	ops Operations
}

type Mux interface {
	Handle(pattern string, handler http.Handler)
}

func RegisterHTTP(ops Operations, r Mux) *OpenAPIHandlers {
	s := OpenAPIHandlers{
		ops: ops,
	}

	r.Handle("GET /", http.HandlerFunc(s.Get))

	return &s
}

// Get
func (h OpenAPIHandlers) Get(w http.ResponseWriter, r *http.Request) {
	var err error

	logctx.SetOperation(r.Context(), "get")
	logctx.AddStrToContext(r.Context(), "op", "get")

	response, err := h.ops.Get(r.Context())
	if err != nil {
		httputil.ErrorHandler(w, r, err)

		return
	}

	httputil.JSONWrite(w, r, 200, response)
}

Note that "encoding/json" appears twice in the import list. This causes go builds to fail.

Workaround: run a fomatter to tidy up imports (goimports is not sufficient) after foji but before any build or mockery using the output.