Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 1 | // Copyright 2018 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 | // This tool reads "make"-like dependency files, and outputs a canonical version |
| 16 | // that can be used by ninja. Ninja doesn't support multiple output files (even |
| 17 | // though it doesn't care what the output file is, or whether it matches what is |
| 18 | // expected). |
| 19 | package main |
| 20 | |
| 21 | import ( |
| 22 | "bytes" |
| 23 | "flag" |
| 24 | "fmt" |
| 25 | "io/ioutil" |
| 26 | "log" |
| 27 | "os" |
Dan Willemsen | c89b6f1 | 2019-08-29 14:47:40 -0700 | [diff] [blame] | 28 | |
| 29 | "android/soong/makedeps" |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 30 | ) |
| 31 | |
| 32 | func main() { |
| 33 | flag.Usage = func() { |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 34 | fmt.Fprintf(os.Stderr, "Usage: %s [-o <output>] <depfile.d> [<depfile.d>...]", os.Args[0]) |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 35 | flag.PrintDefaults() |
| 36 | } |
| 37 | output := flag.String("o", "", "Optional output file (defaults to rewriting source if necessary)") |
| 38 | flag.Parse() |
| 39 | |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 40 | if flag.NArg() < 1 { |
| 41 | log.Fatal("Expected at least one input file as an argument") |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 42 | } |
| 43 | |
Dan Willemsen | c89b6f1 | 2019-08-29 14:47:40 -0700 | [diff] [blame] | 44 | var mergedDeps *makedeps.Deps |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 45 | var firstInput []byte |
| 46 | |
| 47 | for i, arg := range flag.Args() { |
| 48 | input, err := ioutil.ReadFile(arg) |
| 49 | if err != nil { |
| 50 | log.Fatalf("Error opening %q: %v", arg, err) |
| 51 | } |
| 52 | |
Dan Willemsen | c89b6f1 | 2019-08-29 14:47:40 -0700 | [diff] [blame] | 53 | deps, err := makedeps.Parse(arg, bytes.NewBuffer(append([]byte(nil), input...))) |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 54 | if err != nil { |
| 55 | log.Fatalf("Failed to parse: %v", err) |
| 56 | } |
| 57 | |
| 58 | if i == 0 { |
| 59 | mergedDeps = deps |
| 60 | firstInput = input |
| 61 | } else { |
| 62 | mergedDeps.Inputs = append(mergedDeps.Inputs, deps.Inputs...) |
| 63 | } |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 64 | } |
| 65 | |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 66 | new := mergedDeps.Print() |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 67 | |
| 68 | if *output == "" || *output == flag.Arg(0) { |
Colin Cross | 1d2cf04 | 2019-03-29 15:33:06 -0700 | [diff] [blame] | 69 | if !bytes.Equal(firstInput, new) { |
Dan Willemsen | 4339853 | 2018-02-21 02:10:29 -0800 | [diff] [blame] | 70 | err := ioutil.WriteFile(flag.Arg(0), new, 0666) |
| 71 | if err != nil { |
| 72 | log.Fatalf("Failed to write: %v", err) |
| 73 | } |
| 74 | } |
| 75 | } else { |
| 76 | err := ioutil.WriteFile(*output, new, 0666) |
| 77 | if err != nil { |
| 78 | log.Fatalf("Failed to write to %q: %v", *output, err) |
| 79 | } |
| 80 | } |
| 81 | } |