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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// load default environment variables (from $VESPA_HOME/conf/vespa/default-env.txt)
// Author: arnej
package util
import (
"bytes"
)
func needQuoting(s string) bool {
for _, ch := range s {
switch {
case (ch >= 'A' && ch <= 'Z'):
case (ch >= 'a' && ch <= 'z'):
case (ch >= '0' && ch <= '9'):
case ch == '-':
case ch == '_':
case ch == '.':
case ch == ':':
case ch == '/':
// all above: nop
default:
return true
}
}
return false
}
func quote(s string, t *bytes.Buffer) {
const singleQuote = '\''
if !needQuoting(s) {
t.WriteString(s)
return
}
t.WriteByte(singleQuote)
for _, ch := range s {
switch {
case ch == '\'' || ch == '\\':
t.WriteByte(singleQuote)
t.WriteByte('\\')
t.WriteByte(byte(ch))
t.WriteByte(singleQuote)
case ch < 32 || ch > 127:
t.WriteByte('?')
default:
t.WriteByte(byte(ch))
}
}
t.WriteByte(singleQuote)
}
func ShellQuoteArgs(args ...string) string {
var buf bytes.Buffer
for idx, s := range args {
if idx > 0 {
buf.WriteByte(' ')
}
quote(s, &buf)
}
return buf.String()
}
func ShellQuote(s string) string {
var buf bytes.Buffer
quote(s, &buf)
return buf.String()
}
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