drone-s3-sync/vendor/github.com/ryanuber/go-glob/glob.go

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package glob
import "strings"
// The character which is treated like a glob
const GLOB = "*"
// Glob will test a string pattern, potentially containing globs, against a
// subject string. The result is a simple true/false, determining whether or
// not the glob pattern matched the subject text.
func Glob(pattern, subj string) bool {
// Empty pattern can only match empty subject
if pattern == "" {
return subj == pattern
}
// If the pattern _is_ a glob, it matches everything
if pattern == GLOB {
return true
}
parts := strings.Split(pattern, GLOB)
if len(parts) == 1 {
// No globs in pattern, so test for equality
return subj == pattern
}
leadingGlob := strings.HasPrefix(pattern, GLOB)
trailingGlob := strings.HasSuffix(pattern, GLOB)
end := len(parts) - 1
for i, part := range parts {
switch i {
case 0:
if leadingGlob {
continue
}
if !strings.HasPrefix(subj, part) {
return false
}
case end:
if len(subj) > 0 {
return trailingGlob || strings.HasSuffix(subj, part)
}
default:
if !strings.Contains(subj, part) {
return false
}
}
// Trim evaluated text from subj as we loop over the pattern.
idx := strings.Index(subj, part) + len(part)
subj = subj[idx:]
}
// All parts of the pattern matched
return true
}