87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
package properties
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import (
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"bufio"
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"bytes"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"unicode"
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)
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// StoringFunction -- type
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type StoringFunction func(Properties) (*os.File, error)
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func defaultStore(p Properties) (*os.File, error) {
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absolutePathFile, err := filepath.Abs(filepath.Join(p.Path(), p.FileName()))
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if err != nil {
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return nil, err
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}
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file, err := os.OpenFile(absolutePathFile, os.O_CREATE|os.O_RDWR, 0644)
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if err != nil {
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return nil, err
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}
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// Write this file
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defer file.Close()
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writer := bufio.NewWriter(file)
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for _, pair := range p.values {
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line := fmt.Sprintf("%s=%s\n", escape(pair.First, true), escape(pair.Second, false))
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log.Print(line)
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if _, err := writer.Write([]byte(line)); err != nil {
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return nil, err
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}
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}
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if err := writer.Flush(); err != nil {
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return nil, err
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}
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return file, nil
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}
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// escape returns a string that is safe to use as either a key or value in a
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// property file. Whitespace characters, key separators, and comment markers
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// should always be escaped.
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func escape(s string, key bool) string {
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leading := true
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var buf bytes.Buffer
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for _, ch := range s {
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wasSpace := false
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if ch == '\t' {
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buf.WriteString(`\t`)
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} else if ch == '\n' {
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buf.WriteString(`\n`)
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} else if ch == '\r' {
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buf.WriteString(`\r`)
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} else if ch == '\f' {
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buf.WriteString(`\f`)
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} else if ch == ' ' {
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if key || leading {
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buf.WriteString(`\ `)
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wasSpace = true
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} else {
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buf.WriteRune(ch)
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}
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} else if ch == ':' {
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buf.WriteString(`\:`)
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} else if ch == '=' {
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buf.WriteString(`\=`)
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} else if ch == '#' {
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buf.WriteString(`\#`)
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} else if ch == '!' {
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buf.WriteString(`\!`)
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} else if !unicode.IsPrint(ch) || ch > 126 {
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buf.WriteString(fmt.Sprintf(`\u%04x`, ch))
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} else {
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buf.WriteRune(ch)
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}
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if !wasSpace {
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leading = false
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}
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}
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return buf.String()
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}
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