mirror of
https://github.com/spf13/cobra
synced 2024-11-17 03:07:09 +00:00
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package cmd
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import (
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"bytes"
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"errors"
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"fmt"
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"io/ioutil"
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"os/exec"
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)
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func init() {
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// Mute commands.
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addCmd.SetOut(new(bytes.Buffer))
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addCmd.SetErr(new(bytes.Buffer))
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initCmd.SetOut(new(bytes.Buffer))
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initCmd.SetErr(new(bytes.Buffer))
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}
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// ensureLF converts any \r\n to \n
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func ensureLF(content []byte) []byte {
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return bytes.Replace(content, []byte("\r\n"), []byte("\n"), -1)
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}
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// compareFiles compares the content of files with pathA and pathB.
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// If contents are equal, it returns nil.
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// If not, it returns which files are not equal
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// and diff (if system has diff command) between these files.
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func compareFiles(pathA, pathB string) error {
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contentA, err := ioutil.ReadFile(pathA)
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if err != nil {
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return err
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}
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contentB, err := ioutil.ReadFile(pathB)
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if err != nil {
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return err
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}
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if !bytes.Equal(ensureLF(contentA), ensureLF(contentB)) {
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output := new(bytes.Buffer)
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output.WriteString(fmt.Sprintf("%q and %q are not equal!\n\n", pathA, pathB))
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diffPath, err := exec.LookPath("diff")
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if err != nil {
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// Don't execute diff if it can't be found.
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return nil
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}
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diffCmd := exec.Command(diffPath, "-u", pathA, pathB)
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diffCmd.Stdout = output
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diffCmd.Stderr = output
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output.WriteString("$ diff -u " + pathA + " " + pathB + "\n")
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if err := diffCmd.Run(); err != nil {
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output.WriteString("\n" + err.Error())
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}
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return errors.New(output.String())
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}
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return nil
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}
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