52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
|
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
|
||
|
|
|
||
|
|
// Check the first section. Requires special handling.
|
||
|
|
if !leadingGlob && !strings.HasPrefix(subj, parts[0]) {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Go over the middle parts and ensure they match.
|
||
|
|
for i := 1; i < end; i++ {
|
||
|
|
if !strings.Contains(subj, parts[i]) {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Trim evaluated text from subj as we loop over the pattern.
|
||
|
|
idx := strings.Index(subj, parts[i]) + len(parts[i])
|
||
|
|
subj = subj[idx:]
|
||
|
|
}
|
||
|
|
|
||
|
|
// Reached the last section. Requires special handling.
|
||
|
|
return trailingGlob || strings.HasSuffix(subj, parts[end])
|
||
|
|
}
|