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Prompt before overwriting main.go during init #121

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Prompt before overwriting main.go during init #121

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30 changes: 29 additions & 1 deletion cmd/project.go
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
package cmd

import (
"bufio"
"fmt"
"os"
"strings"
"text/template"

"github.com/spf13/cobra"
Expand Down Expand Up @@ -36,7 +38,15 @@ func (p *Project) Create() error {
}

// create main.go
mainFile, err := os.Create(fmt.Sprintf("%s/main.go", p.AbsolutePath))
mainPath := fmt.Sprintf("%s/main.go", p.AbsolutePath)
ok, err := confirmMainOverwrite(mainPath)
if err != nil {
return err
}
if !ok {
return fmt.Errorf("aborted: %s already exists", mainPath)
}
mainFile, err := os.Create(mainPath)
if err != nil {
return err
}
Expand Down Expand Up @@ -68,6 +78,24 @@ func (p *Project) Create() error {
return p.createLicenseFile()
}

func confirmMainOverwrite(path string) (bool, error) {
if _, err := os.Stat(path); err != nil {
if os.IsNotExist(err) {
return true, nil
}
return false, err
}

fmt.Printf("%s already exists. Overwrite? [y/N]: ", path)
reader := bufio.NewReader(os.Stdin)
response, err := reader.ReadString('\n')
if err != nil {
return false, err
}
response = strings.TrimSpace(strings.ToLower(response))
return response == "y" || response == "yes", nil
}

func (p *Project) createLicenseFile() error {
data := map[string]interface{}{
"copyright": copyrightLine(),
Expand Down