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spec.go
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spec.go
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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package generate
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"github.com/go-openapi/loads"
"github.com/go-openapi/spec"
"github.com/go-swagger/go-swagger/scan"
"github.com/jessevdk/go-flags"
)
// SpecFile command to generate a swagger spec from a go application
type SpecFile struct {
BasePath string `long:"base-path" short:"b" description:"the base path to use" default:"."`
ScanModels bool `long:"scan-models" short:"m" description:"includes models that were annotated with 'swagger:model'"`
Output flags.Filename `long:"output" short:"o" description:"the file to write to"`
Input flags.Filename `long:"input" short:"i" description:"the file to use as input"`
}
// Execute runs this command
func (s *SpecFile) Execute(args []string) error {
input, err := loadSpec(string(s.Input))
if err != nil {
return err
}
var opts scan.Opts
opts.BasePath = s.BasePath
opts.Input = input
opts.ScanModels = s.ScanModels
swspec, err := scan.Application(opts)
if err != nil {
return err
}
return writeToFile(swspec, string(s.Output))
}
var (
newLine = []byte("\n")
)
func loadSpec(input string) (*spec.Swagger, error) {
if fi, err := os.Stat(input); err == nil {
if fi.IsDir() {
return nil, fmt.Errorf("expected %q to be a file not a directory", input)
}
sp, err := loads.Spec(input)
if err != nil {
return nil, err
}
return sp.Spec(), nil
}
return nil, nil
}
func writeToFile(swspec *spec.Swagger, output string) error {
b, err := json.Marshal(swspec)
if err != nil {
return err
}
if output == "" {
fmt.Println(string(b))
return nil
}
return ioutil.WriteFile(output, b, 0644)
}