Jesse Wilson | 0ad6047 | 2009-09-14 11:23:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | import java.io.BufferedReader; |
| 18 | import java.io.IOException; |
| 19 | import java.io.InputStreamReader; |
| 20 | import java.util.ArrayList; |
| 21 | import java.util.Arrays; |
| 22 | import java.util.Collection; |
| 23 | import java.util.List; |
| 24 | |
| 25 | /** |
| 26 | * An out of process executable. |
| 27 | */ |
| 28 | class Command { |
| 29 | |
| 30 | private final List<String> args; |
| 31 | private final boolean permitNonZeroExitStatus; |
| 32 | |
| 33 | Command(String... args) { |
| 34 | this(Arrays.asList(args)); |
| 35 | } |
| 36 | |
| 37 | Command(List<String> args) { |
| 38 | this.args = new ArrayList<String>(args); |
| 39 | this.permitNonZeroExitStatus = false; |
| 40 | } |
| 41 | |
| 42 | private Command(Builder builder) { |
| 43 | this.args = new ArrayList<String>(builder.args); |
| 44 | this.permitNonZeroExitStatus = builder.permitNonZeroExitStatus; |
| 45 | } |
| 46 | |
| 47 | static class Builder { |
| 48 | private final List<String> args = new ArrayList<String>(); |
| 49 | private boolean permitNonZeroExitStatus = false; |
| 50 | |
| 51 | public Builder args(String... args) { |
| 52 | return args(Arrays.asList(args)); |
| 53 | } |
| 54 | |
| 55 | public Builder args(Collection<String> args) { |
| 56 | this.args.addAll(args); |
| 57 | return this; |
| 58 | } |
| 59 | |
| 60 | public Builder permitNonZeroExitStatus() { |
| 61 | permitNonZeroExitStatus = true; |
| 62 | return this; |
| 63 | } |
| 64 | |
| 65 | public Command build() { |
| 66 | return new Command(this); |
| 67 | } |
| 68 | |
| 69 | public List<String> execute() { |
| 70 | return build().execute(); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public List<String> execute() { |
| 75 | try { |
| 76 | Process process = new ProcessBuilder() |
| 77 | .command(args) |
| 78 | .redirectErrorStream(true) |
| 79 | .start(); |
| 80 | |
| 81 | BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream())); |
| 82 | List<String> outputLines = new ArrayList<String>(); |
| 83 | String outputLine; |
| 84 | while ((outputLine = in.readLine()) != null) { |
| 85 | outputLines.add(outputLine); |
| 86 | } |
| 87 | |
| 88 | if (process.waitFor() != 0 && !permitNonZeroExitStatus) { |
| 89 | StringBuilder message = new StringBuilder(); |
| 90 | for (String line : outputLines) { |
| 91 | message.append("\n").append(line); |
| 92 | } |
| 93 | throw new RuntimeException("Process failed: " + args + message); |
| 94 | } |
| 95 | |
| 96 | return outputLines; |
| 97 | } catch (IOException e) { |
| 98 | throw new RuntimeException("Process failed: " + args, e); |
| 99 | } catch (InterruptedException e) { |
| 100 | throw new RuntimeException("Process failed: " + args, e); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | } |