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// Copyright (c) 2020 Cisco and/or its affiliates.
//
// 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 binapigen
import (
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"regexp"
"strings"
"github.com/sirupsen/logrus"
"git.fd.io/govpp.git/binapigen/vppapi"
)
type Options struct {
OutputDir string // output directory for generated files
ImportPrefix string // prefix for import paths
NoVersionInfo bool // disables generating version info
}
func Run(apiDir string, filesToGenerate []string, opts Options, f func(*Generator) error) {
if err := run(apiDir, filesToGenerate, opts, f); err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", filepath.Base(os.Args[0]), err)
os.Exit(1)
}
}
func run(apiDir string, filesToGenerate []string, opts Options, fn func(*Generator) error) error {
apifiles, err := vppapi.ParseDir(apiDir)
if err != nil {
return err
}
if opts.ImportPrefix == "" {
opts.ImportPrefix = resolveImportPath(opts.OutputDir)
logrus.Debugf("resolved import prefix: %s", opts.ImportPrefix)
}
gen, err := New(opts, apifiles, filesToGenerate)
if err != nil {
return err
}
gen.vppVersion = vppapi.ResolveVPPVersion(apiDir)
if gen.vppVersion == "" {
gen.vppVersion = "unknown"
}
if fn == nil {
GenerateDefault(gen)
} else {
if err := fn(gen); err != nil {
return err
}
}
if err = gen.Generate(); err != nil {
return err
}
return nil
}
func GenerateDefault(gen *Generator) {
for _, file := range gen.Files {
if !file.Generate {
continue
}
GenerateAPI(gen, file)
GenerateRPC(gen, file)
}
}
var Logger = logrus.New()
func init() {
if debug := os.Getenv("DEBUG_GOVPP"); strings.Contains(debug, "binapigen") {
Logger.SetLevel(logrus.DebugLevel)
logrus.SetLevel(logrus.DebugLevel)
} else if debug != "" {
Logger.SetLevel(logrus.InfoLevel)
} else {
Logger.SetLevel(logrus.WarnLevel)
}
}
func logf(f string, v ...interface{}) {
Logger.Debugf(f, v...)
}
func resolveImportPath(dir string) string {
absPath, err := filepath.Abs(dir)
if err != nil {
panic(err)
}
modRoot := findGoModuleRoot(absPath)
if modRoot == "" {
logrus.Fatalf("module root not found at: %s", absPath)
}
modPath := findModulePath(path.Join(modRoot, "go.mod"))
if modPath == "" {
logrus.Fatalf("module path not found")
}
relDir, err := filepath.Rel(modRoot, absPath)
if err != nil {
panic(err)
}
return filepath.Join(modPath, relDir)
}
func findGoModuleRoot(dir string) (root string) {
if dir == "" {
panic("dir not set")
}
dir = filepath.Clean(dir)
// Look for enclosing go.mod.
for {
if fi, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil && !fi.IsDir() {
return dir
}
d := filepath.Dir(dir)
if d == dir {
break
}
dir = d
}
return ""
}
var (
modulePathRE = regexp.MustCompile(`module[ \t]+([^ \t\r\n]+)`)
)
func findModulePath(file string) string {
data, err := ioutil.ReadFile(file)
if err != nil {
return ""
}
m := modulePathRE.FindSubmatch(data)
if m == nil {
return ""
}
return string(m[1])
}
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