mirror of https://github.com/docker/docs.git
34 lines
804 B
Go
34 lines
804 B
Go
package evaluator
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import (
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"regexp"
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"strings"
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)
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var (
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TOKEN_ESCAPED_QUOTE = regexp.MustCompile(`\\"`)
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TOKEN_ESCAPED_ESCAPE = regexp.MustCompile(`\\\\`)
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TOKEN_ENV_INTERPOLATION = regexp.MustCompile("(\\\\\\\\+|[^\\\\]|\\b|\\A)\\$({?)([[:alnum:]_]+)(}?)")
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)
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func stripQuotes(str string) string {
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str = str[1 : len(str)-1]
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str = TOKEN_ESCAPED_QUOTE.ReplaceAllString(str, `"`)
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return TOKEN_ESCAPED_ESCAPE.ReplaceAllString(str, `\`)
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}
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func replaceEnv(b *buildFile, str string) string {
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for _, match := range TOKEN_ENV_INTERPOLATION.FindAllString(str, -1) {
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match = match[strings.Index(match, "$"):]
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matchKey := strings.Trim(match, "${}")
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for envKey, envValue := range b.env {
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if matchKey == envKey {
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str = strings.Replace(str, match, envValue, -1)
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}
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}
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}
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return str
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}
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