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 package kati 16 17 import ( 18 "os" 19 "path/filepath" 20 ) 21 22 func exists(filename string) bool { 23 _, err := os.Stat(filename) 24 if os.IsNotExist(err) { 25 return false 26 } 27 return true 28 } 29 30 type vpath struct { 31 pattern string 32 dirs []string 33 } 34 35 type searchPaths struct { 36 vpaths []vpath // vpath directives 37 dirs []string // VPATH variable 38 } 39 40 func (s searchPaths) exists(target string) (string, bool) { 41 if exists(target) { 42 return target, true 43 } 44 for _, vpath := range s.vpaths { 45 if !matchPattern(vpath.pattern, target) { 46 continue 47 } 48 for _, dir := range vpath.dirs { 49 vtarget := filepath.Join(dir, target) 50 if exists(vtarget) { 51 return vtarget, true 52 } 53 } 54 } 55 for _, dir := range s.dirs { 56 vtarget := filepath.Join(dir, target) 57 if exists(vtarget) { 58 return vtarget, true 59 } 60 } 61 return target, false 62 } 63
