git-scripts/git-proxy/parseargs.go

60 lines
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2019-06-02 02:59:40 +00:00
package main
import (
"fmt"
"strings"
"unicode"
)
const NullStr = rune(0)
// ParseArgs will parse a string that contains quoted strings the same as bash does
// (same as most other *nix shells do). This is secure in the sense that it doesn't do any
// executing or interpeting. However, it also doesn't do any escaping, so you shouldn't pass
// these strings to shells without escaping them.
func ParseArgs(str string) ([]string, error) {
var m []string
var s string
str = strings.TrimSpace(str) + " "
lastQuote := NullStr
isSpace := false
for i, c := range str {
switch {
// If we're ending a quote, break out and skip this character
case c == lastQuote:
lastQuote = NullStr
// If we're in a quote, count this character
case lastQuote != NullStr:
s += string(c)
// If we encounter a quote, enter it and skip this character
case unicode.In(c, unicode.Quotation_Mark):
isSpace = false
lastQuote = c
// If it's a space, store the string
case unicode.IsSpace(c):
if 0 == i || isSpace {
continue
}
isSpace = true
m = append(m, s)
s = ""
default:
isSpace = false
s += string(c)
}
}
if lastQuote != NullStr {
return nil, fmt.Errorf("Quotes did not terminate")
}
return m, nil
}