1 // Copyright 2015 Google Inc. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // soong_glob is the command line tool that checks if the list of files matching a glob has 16 // changed, and only updates the output file list if it has changed. It is used to optimize 17 // out build.ninja regenerations when non-matching files are added. See 18 // android/soong/common/glob.go for a longer description. 19 package main 20 21 import ( 22 "flag" 23 "fmt" 24 "os" 25 26 "android/soong/glob" 27 ) 28 29 var ( 30 out = flag.String("o", "", "file to write list of files that match glob") 31 32 excludes multiArg 33 ) 34 35 func init() { 36 flag.Var(&excludes, "e", "pattern to exclude from results") 37 } 38 39 type multiArg []string 40 41 func (m *multiArg) String() string { 42 return `""` 43 } 44 45 func (m *multiArg) Set(s string) error { 46 *m = append(*m, s) 47 return nil 48 } 49 50 func (m *multiArg) Get() interface{} { 51 return m 52 } 53 54 func usage() { 55 fmt.Fprintf(os.Stderr, "usage: soong_glob -o out glob\n") 56 flag.PrintDefaults() 57 os.Exit(2) 58 } 59 60 func main() { 61 flag.Parse() 62 63 if *out == "" { 64 fmt.Fprintln(os.Stderr, "error: -o is required\n") 65 usage() 66 } 67 68 if flag.NArg() != 1 { 69 usage() 70 } 71 72 _, err := glob.GlobWithDepFile(flag.Arg(0), *out, *out+".d", excludes) 73 if err != nil { 74 fmt.Fprintf(os.Stderr, "error: %s\n", err.Error()) 75 os.Exit(1) 76 } 77 } 78
