61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"io/ioutil"
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"os"
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"os/exec"
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)
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// Diff prints the unified diff of the two provided byte slices
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// using the unix diff command.
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func Diff(left, right []byte) error {
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lf, err := ioutil.TempFile("/tmp", "actual-file-")
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if err != nil {
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return err
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}
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defer lf.Close()
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defer os.Remove(lf.Name())
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rf, err := ioutil.TempFile("/tmp", "expected-file-")
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if err != nil {
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return err
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}
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defer rf.Close()
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defer os.Remove(rf.Name())
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_, err = lf.Write(left)
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if err != nil {
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return err
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}
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lf.Close()
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_, err = rf.Write(right)
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if err != nil {
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return err
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}
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rf.Close()
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cmd := exec.Command("/usr/bin/diff", "-u", lf.Name(), rf.Name())
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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cmd.Run()
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return nil
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}
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