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// Copyright 2016 The go-qemu Authors.
//
// 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 gen
import (
"bytes"
"encoding/json"
"flag"
"go/format"
"io/ioutil"
)
const specURL = `https://raw.githubusercontent.com/qemu/qemu/stable-2.11/qapi-schema.json`
var (
inputSpec = flag.String("input", specURL, "Input spec")
outputGo = flag.String("output", "", "Generated code output")
outputSpec = flag.String("spec", "", "Generated spec output")
templates = flag.String("templates", "", "Template directory")
)
// Generate parses a QMP API spec and generates a Go implementation.
func Generate() error {
flag.Parse()
defs, err := readDefinitions(*inputSpec)
if err != nil {
return err
}
// Write out the concatenated spec.
var spec bytes.Buffer
// First add a comment with the best guess of version
spec.WriteString("\n##QEMU SPECIFICATION VERSION: ")
spec.WriteString(tryGetVersionFromSpecPath(*inputSpec))
spec.WriteString("\n\n")
for _, def := range defs {
spec.WriteString(def.Docstring)
spec.WriteByte('\n')
json.Indent(&spec, def.JSON, "", " ")
spec.WriteString("\n\n")
}
if err = ioutil.WriteFile(*outputSpec, spec.Bytes(), 0640); err != nil {
return err
}
// Generate and write out the code.
symbols, err := parse(defs)
if err != nil {
return err
}
need := neededTypes(symbols)
bs, err := renderAPI(*templates, symbols, need)
if err != nil {
return err
}
formatted, err := format.Source(bs)
if err != nil {
// Ignore the error, we're just trying to write out the
// unformatted code to help debugging.
ioutil.WriteFile(*outputGo, bs, 0640)
return err
}
return ioutil.WriteFile(*outputGo, formatted, 0640)
}
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