[8295] | 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Diagnostics;
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| 4 | using System.IO;
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| 5 | using System.Text;
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| 6 | using System.Text.RegularExpressions;
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| 7 |
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| 8 | namespace Google.ProtocolBuffers.ProtoGen
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| 9 | {
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| 10 | /// <summary>
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| 11 | /// Preprocesses any input files with an extension of '.proto' by running protoc.exe. If arguments
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| 12 | /// are supplied with '--' prefix they are provided to protoc.exe, otherwise they are assumed to
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| 13 | /// be used for ProtoGen.exe which is run on the resulting output proto buffer. If the option
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| 14 | /// --descriptor_set_out= is specified the proto buffer file is kept, otherwise it will be removed
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| 15 | /// after code generation.
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| 16 | /// </summary>
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| 17 | public class ProgramPreprocess
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| 18 | {
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| 19 | private const string ProtocExecutable = "protoc.exe";
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| 20 | private const string ProtocDirectoryArg = "--protoc_dir=";
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| 21 |
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| 22 | private static int Main(string[] args)
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| 23 | {
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| 24 | try
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| 25 | {
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| 26 | return Environment.ExitCode = Run(args);
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| 27 | }
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| 28 | catch (Exception ex)
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| 29 | {
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| 30 | Console.Error.WriteLine(ex);
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| 31 | return Environment.ExitCode = 2;
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| 32 | }
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| 33 | }
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| 34 |
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| 35 | public static int Run(params string[] args)
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| 36 | {
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| 37 | bool deleteFile = false;
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| 38 | string tempFile = null;
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| 39 | int result;
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| 40 | bool doHelp = args.Length == 0;
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| 41 | try
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| 42 | {
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| 43 | List<string> protocArgs = new List<string>();
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| 44 | List<string> protoGenArgs = new List<string>();
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| 45 |
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| 46 | string protocFile = GuessProtocFile(args);
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| 47 |
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| 48 | foreach (string arg in args)
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| 49 | {
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| 50 | doHelp |= StringComparer.OrdinalIgnoreCase.Equals(arg, "/?");
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| 51 | doHelp |= StringComparer.OrdinalIgnoreCase.Equals(arg, "/help");
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| 52 | doHelp |= StringComparer.OrdinalIgnoreCase.Equals(arg, "-?");
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| 53 | doHelp |= StringComparer.OrdinalIgnoreCase.Equals(arg, "-help");
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| 54 |
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| 55 | if (arg.StartsWith("--descriptor_set_out="))
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| 56 | {
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| 57 | tempFile = arg.Substring("--descriptor_set_out=".Length);
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| 58 | protoGenArgs.Add(tempFile);
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| 59 | }
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| 60 | }
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| 61 |
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| 62 | if (doHelp)
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| 63 | {
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| 64 | Console.WriteLine();
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| 65 | Console.WriteLine("PROTOC.exe: Use any of the following options that begin with '--':");
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| 66 | Console.WriteLine();
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| 67 | try
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| 68 | {
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| 69 | RunProtoc(protocFile, "--help");
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| 70 | }
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| 71 | catch (Exception ex)
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| 72 | {
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| 73 | Console.Error.WriteLine(ex.Message);
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| 74 | }
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| 75 | Console.WriteLine();
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| 76 | Console.WriteLine();
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| 77 | Console.WriteLine(
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| 78 | "PROTOGEN.exe: The following options are used to specify defaults for code generation.");
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| 79 | Console.WriteLine();
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| 80 | Program.Main(new string[0]);
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| 81 | Console.WriteLine();
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| 82 | Console.WriteLine("The following option enables PROTOGEN.exe to find PROTOC.exe");
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| 83 | Console.WriteLine("{0}<directory containing protoc.exe>", ProtocDirectoryArg);
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| 84 | return 0;
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| 85 | }
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| 86 |
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| 87 | foreach (string arg in args)
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| 88 | {
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| 89 | if (arg.StartsWith(ProtocDirectoryArg))
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| 90 | {
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| 91 | // Handled earlier
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| 92 | continue;
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| 93 | }
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| 94 | if (arg.StartsWith("--"))
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| 95 | {
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| 96 | protocArgs.Add(arg);
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| 97 | }
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| 98 | else if (File.Exists(arg) &&
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| 99 | StringComparer.OrdinalIgnoreCase.Equals(".proto", Path.GetExtension(arg)))
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| 100 | {
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| 101 | if (tempFile == null)
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| 102 | {
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| 103 | deleteFile = true;
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| 104 | tempFile = Path.GetTempFileName();
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| 105 | protocArgs.Add(String.Format("--descriptor_set_out={0}", tempFile));
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| 106 | protoGenArgs.Add(tempFile);
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| 107 | }
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| 108 | protocArgs.Add(arg);
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| 109 | }
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| 110 | else
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| 111 | {
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| 112 | protoGenArgs.Add(arg);
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| 113 | }
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| 114 | }
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| 115 |
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| 116 | if (tempFile != null)
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| 117 | {
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| 118 | result = RunProtoc(protocFile, protocArgs.ToArray());
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| 119 | if (result != 0)
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| 120 | {
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| 121 | return result;
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| 122 | }
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| 123 | }
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| 124 |
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| 125 | result = Program.Main(protoGenArgs.ToArray());
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| 126 | }
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| 127 | finally
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| 128 | {
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| 129 | if (deleteFile && tempFile != null && File.Exists(tempFile))
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| 130 | {
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| 131 | File.Delete(tempFile);
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| 132 | }
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| 133 | }
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| 134 | return result;
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| 135 | }
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| 136 |
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| 137 | /// <summary>
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| 138 | /// Tries to work out where protoc is based on command line arguments, the current
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| 139 | /// directory, the directory containing protogen, and the path.
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| 140 | /// </summary>
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| 141 | /// <returns>The path to protoc.exe, or null if it can't be found.</returns>
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| 142 | private static string GuessProtocFile(params string[] args)
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| 143 | {
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| 144 | // Why oh why is this not in System.IO.Path or Environment...?
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| 145 | List<string> searchPath = new List<string>();
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| 146 | foreach (string arg in args)
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| 147 | {
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| 148 | if (arg.StartsWith("--protoc_dir="))
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| 149 | {
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| 150 | searchPath.Add(arg.Substring(ProtocDirectoryArg.Length));
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| 151 | }
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| 152 | }
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| 153 | searchPath.Add(Environment.CurrentDirectory);
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| 154 | searchPath.Add(AppDomain.CurrentDomain.BaseDirectory);
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| 155 | searchPath.AddRange((Environment.GetEnvironmentVariable("PATH") ?? String.Empty).Split(Path.PathSeparator));
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| 156 |
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| 157 | foreach (string path in searchPath)
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| 158 | {
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| 159 | string exeFile = Path.Combine(path, ProtocExecutable);
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| 160 | if (File.Exists(exeFile))
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| 161 | {
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| 162 | return exeFile;
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| 163 | }
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| 164 | }
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| 165 | return null;
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| 166 | }
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| 167 |
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| 168 | private static int RunProtoc(string exeFile, params string[] args)
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| 169 | {
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| 170 | if (exeFile == null)
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| 171 | {
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| 172 | throw new FileNotFoundException(
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| 173 | "Unable to locate " + ProtocExecutable +
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| 174 | " make sure it is in the PATH, cwd, or exe dir, or use --protoc_dir=...");
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| 175 | }
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| 176 |
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| 177 | ProcessStartInfo psi = new ProcessStartInfo(exeFile);
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| 178 | psi.Arguments = EscapeArguments(args);
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| 179 | psi.RedirectStandardError = true;
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| 180 | psi.RedirectStandardInput = false;
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| 181 | psi.RedirectStandardOutput = true;
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| 182 | psi.ErrorDialog = false;
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| 183 | psi.CreateNoWindow = true;
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| 184 | psi.UseShellExecute = false;
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| 185 | psi.WorkingDirectory = Environment.CurrentDirectory;
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| 186 |
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| 187 | Process process = Process.Start(psi);
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| 188 | if (process == null)
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| 189 | {
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| 190 | return 1;
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| 191 | }
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| 192 |
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| 193 | process.WaitForExit();
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| 194 |
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| 195 | string tmp = process.StandardOutput.ReadToEnd();
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| 196 | if (tmp.Trim().Length > 0)
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| 197 | {
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| 198 | Console.Out.WriteLine(tmp);
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| 199 | }
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| 200 | tmp = process.StandardError.ReadToEnd();
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| 201 | if (tmp.Trim().Length > 0)
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| 202 | {
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| 203 | Console.Error.WriteLine(tmp);
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| 204 | }
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| 205 | return process.ExitCode;
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| 206 | }
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| 207 |
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| 208 | /// <summary>
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| 209 | /// Quotes all arguments that contain whitespace, or begin with a quote and returns a single
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| 210 | /// argument string for use with Process.Start().
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| 211 | /// </summary>
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| 212 | /// <remarks>http://csharptest.net/?p=529</remarks>
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| 213 | /// <param name="args">A list of strings for arguments, may not contain null, '\0', '\r', or '\n'</param>
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| 214 | /// <returns>The combined list of escaped/quoted strings</returns>
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| 215 | /// <exception cref="System.ArgumentNullException">Raised when one of the arguments is null</exception>
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| 216 | /// <exception cref="System.ArgumentOutOfRangeException">Raised if an argument contains '\0', '\r', or '\n'</exception>
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| 217 | public static string EscapeArguments(params string[] args)
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| 218 | {
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| 219 | StringBuilder arguments = new StringBuilder();
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| 220 | Regex invalidChar = new Regex("[\x00\x0a\x0d]");// these can not be escaped
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| 221 | Regex needsQuotes = new Regex(@"\s|""");// contains whitespace or two quote characters
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| 222 | Regex escapeQuote = new Regex(@"(\\*)(""|$)");// one or more '\' followed with a quote or end of string
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| 223 | for (int carg = 0; args != null && carg < args.Length; carg++)
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| 224 | {
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| 225 | if (args[carg] == null)
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| 226 | {
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| 227 | throw new ArgumentNullException("args[" + carg + "]");
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| 228 | }
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| 229 | if (invalidChar.IsMatch(args[carg]))
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| 230 | {
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| 231 | throw new ArgumentOutOfRangeException("args[" + carg + "]");
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| 232 | }
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| 233 | if (args[carg] == String.Empty)
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| 234 | {
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| 235 | arguments.Append("\"\"");
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| 236 | }
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| 237 | else if (!needsQuotes.IsMatch(args[carg])) { arguments.Append(args[carg]); }
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| 238 | else
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| 239 | {
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| 240 | arguments.Append('"');
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| 241 | arguments.Append(escapeQuote.Replace(args[carg],
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| 242 | m =>
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| 243 | m.Groups[1].Value + m.Groups[1].Value +
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| 244 | (m.Groups[2].Value == "\"" ? "\\\"" : "")
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| 245 | ));
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| 246 | arguments.Append('"');
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| 247 | }
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| 248 | if (carg + 1 < args.Length)
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| 249 | {
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| 250 | arguments.Append(' ');
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| 251 | }
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| 252 | }
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| 253 | return arguments.ToString();
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| 254 | }
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| 255 | }
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| 256 | } |
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