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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
//go:build ignore
// +build ignore
package main
import (
"bytes"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
)
func main() {
dir, err := ioutil.TempDir("", "go-arrow-")
if err != nil {
log.Fatalf("could not create top-level temporary directory: %v", err)
}
defer os.RemoveAll(dir)
genFormat(dir)
}
func genFormat(dir string) {
args := []string{"--go", "-o", filepath.Join(dir, "format")}
fnames, err := filepath.Glob("../../format/*.fbs")
if err != nil || len(fnames) == 0 {
log.Fatalf("could not retrieve list of format FlatBuffers files: files=%d err=%v",
len(fnames), err,
)
}
args = append(args, fnames...)
gen := exec.Command("flatc", args...)
gen.Stdout = os.Stdout
gen.Stderr = os.Stderr
err = gen.Run()
if err != nil {
log.Fatal(err)
}
err = os.MkdirAll("./internal/flatbuf", 0755)
if err != nil {
log.Fatalf("could not create ./internal/flatbuf directory: %v", err)
}
base := filepath.Join(dir, "format", "org", "apache", "arrow", "flatbuf")
fnames, err = filepath.Glob(filepath.Join(base, "*.go"))
if err != nil {
log.Fatalf("could not glob %v/*.go: %v", base, err)
}
for _, fname := range fnames {
dst := filepath.Join(".", "internal", "flatbuf", filepath.Base(fname))
process(dst, fname)
}
}
func process(dst, fname string) {
raw, err := ioutil.ReadFile(fname)
if err != nil {
log.Fatal(err)
}
f, err := os.Create(dst)
if err != nil {
log.Fatal(err)
}
defer f.Close()
if !bytes.HasPrefix(raw, []byte(hdr)) {
_, err = f.Write([]byte(hdr))
if err != nil {
log.Fatal(err)
}
}
_, err = f.Write(raw)
if err != nil {
log.Fatal(err)
}
err = f.Close()
if err != nil {
log.Fatal(err)
}
}
const hdr = `// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
`
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