/
glob.go
61 lines (50 loc) · 1.44 KB
/
glob.go
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package eventwatch
import (
"strings"
)
// reasonMatch 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.
//
// Credit: https://github.com/ryanuber/go-glob
func reasonMatch(pattern, reason string) bool {
if pattern == "" {
return reason == pattern
}
// If the pattern _is_ a glob, it matches everything
if pattern == "*" {
return true
}
// If the pattern does not contain a glob, require strict match by default
if !strings.Contains(pattern, "*") {
return pattern == reason
}
parts := strings.Split(pattern, "*")
if len(parts) == 1 {
// No globs in pattern, so test for equality
return reason == pattern
}
leadingGlob := strings.HasPrefix(pattern, "*")
trailingGlob := strings.HasSuffix(pattern, "*")
end := len(parts) - 1
// Go over the leading parts and ensure they match.
for i := range parts {
idx := strings.Index(reason, parts[i])
switch i {
case 0:
// Check the first section. Requires special handling.
if !leadingGlob && idx != 0 {
return false
}
default:
// Check that the middle parts match.
if idx < 0 {
return false
}
}
// Trim evaluated text from reason as we loop over the pattern.
reason = reason[idx+len(parts[i]):]
}
// Reached the last section. Requires special handling.
return trailingGlob || strings.HasSuffix(reason, parts[end])
}