diff_test.go

Documentation: go.etcd.io/etcd/raft/v3

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package raft
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"io/ioutil"
    21  	"os"
    22  	"os/exec"
    23  	"strings"
    24  )
    25  
    26  func diffu(a, b string) string {
    27  	if a == b {
    28  		return ""
    29  	}
    30  	aname, bname := mustTemp("base", a), mustTemp("other", b)
    31  	defer os.Remove(aname)
    32  	defer os.Remove(bname)
    33  	cmd := exec.Command("diff", "-u", aname, bname)
    34  	buf, err := cmd.CombinedOutput()
    35  	if err != nil {
    36  		if _, ok := err.(*exec.ExitError); ok {
    37  			// do nothing
    38  			return string(buf)
    39  		}
    40  		panic(err)
    41  	}
    42  	return string(buf)
    43  }
    44  
    45  func mustTemp(pre, body string) string {
    46  	f, err := ioutil.TempFile("", pre)
    47  	if err != nil {
    48  		panic(err)
    49  	}
    50  	_, err = io.Copy(f, strings.NewReader(body))
    51  	if err != nil {
    52  		panic(err)
    53  	}
    54  	f.Close()
    55  	return f.Name()
    56  }
    57  
    58  func ltoa(l *raftLog) string {
    59  	s := fmt.Sprintf("committed: %d\n", l.committed)
    60  	s += fmt.Sprintf("applied:  %d\n", l.applied)
    61  	for i, e := range l.allEntries() {
    62  		s += fmt.Sprintf("#%d: %+v\n", i, e)
    63  	}
    64  	return s
    65  }
    66
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