mirror of https://github.com/etcd-io/dbtester.git
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
// Copyright 2017 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package analyze
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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)
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func minFloat64(a, b float64) float64 {
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if a < b {
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return a
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}
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return b
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}
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func maxFloat64(a, b float64) float64 {
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if a > b {
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return a
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}
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return b
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}
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func makeHeader(column string, tag string) string {
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return fmt.Sprintf("%s-%s", column, tag)
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}
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// converts unix nanoseconds to unix second.
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func convertUnixNano(ts int64) int64 {
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return int64(ts / 1e9)
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}
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func openToRead(fpath string) (*os.File, error) {
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f, err := os.OpenFile(fpath, os.O_RDONLY, 0444)
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if err != nil {
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return nil, err
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}
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return f, nil
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}
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func openToAppend(fpath string) (*os.File, error) {
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f, err := os.OpenFile(fpath, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0777)
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if err != nil {
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return nil, err
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}
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return f, nil
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}
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func openToOverwrite(fpath string) (*os.File, error) {
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f, err := os.OpenFile(fpath, os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0777)
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if err != nil {
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return nil, err
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}
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return f, nil
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}
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func toFile(txt, fpath string) error {
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f, err := openToOverwrite(fpath)
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if err != nil {
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f, err = os.Create(fpath)
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if err != nil {
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return err
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}
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}
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defer f.Close()
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_, err = f.WriteString(txt)
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return err
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}
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func copyFile(src, dst string) error {
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if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil {
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return fmt.Errorf("copy: mkdirall: %v", err)
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}
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r, err := os.Open(src)
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if err != nil {
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return fmt.Errorf("copy: open(%q): %v", src, err)
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}
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defer r.Close()
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w, err := os.Create(dst)
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if err != nil {
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return fmt.Errorf("copy: create(%q): %v", dst, err)
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}
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defer w.Close()
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// func Copy(dst Writer, src Reader) (written int64, err error)
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if _, err = io.Copy(w, r); err != nil {
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return err
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}
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if err := w.Sync(); err != nil {
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return err
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}
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if _, err := w.Seek(0, 0); err != nil {
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return err
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}
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return nil
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}
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