| package main |
| |
| import ( |
| "path/filepath" |
| "regexp" |
| "strings" |
| "sync" |
| ) |
| |
| var strinit sync.Once |
| var spacesRe *regexp.Regexp |
| |
| func initStrutil() { |
| var err error |
| spacesRe, err = regexp.Compile(`\s+`) |
| if err != nil { |
| panic(err) |
| } |
| } |
| |
| func splitSpaces(s string) []string { |
| strinit.Do(initStrutil) |
| s = strings.TrimSpace(s) |
| if s == "" { |
| return nil |
| } |
| return spacesRe.Split(s, -1) |
| } |
| |
| func matchPattern(pat string, str string) bool { |
| s := strings.SplitN(pat, "%", 2) |
| if len(s) != 2 { |
| return pat == str |
| } |
| return strings.HasPrefix(str, s[0]) && strings.HasSuffix(str, s[1]) |
| } |
| |
| func substPattern(pat string, repl string, str string) string { |
| ps := strings.SplitN(pat, "%", 2) |
| if len(ps) != 2 { |
| if str == pat { |
| return repl |
| } |
| return str |
| } |
| in := str |
| trimed := str |
| if ps[0] != "" { |
| trimed = strings.TrimPrefix(in, ps[0]) |
| if trimed == in { |
| return str |
| } |
| } |
| in = trimed |
| if ps[1] != "" { |
| trimed = strings.TrimSuffix(in, ps[1]) |
| if trimed == in { |
| return str |
| } |
| } |
| |
| rs := strings.SplitN(repl, "%", 2) |
| if len(rs) != 2 { |
| return repl |
| } |
| return rs[0] + trimed + rs[1] |
| } |
| |
| func stripExt(s string) string { |
| suf := filepath.Ext(s) |
| return s[:len(s)-len(suf)] |
| } |