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132
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1 /*******************************************************************************
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2 Illustrates use of the Arguments class.
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3 *******************************************************************************/
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4
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5 import tango.util.Arguments;
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6 import tango.io.Stdout;
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7 import tango.io.FileConduit;
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8 import tango.text.stream.LineIterator;
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9
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10 void usage()
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11 {
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12 Stdout("Usage: [OPTIONS]... FILES...").newline;
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13 Stdout("This is a program that does something.").newline;
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14 Stdout.newline;
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15 Stdout("OPTIONS: ").newline;
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16 Stdout("Output this help message: -?, --help").newline;
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17 Stdout("Do cool things to your files: -c, -C, --cool").newline;
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18 Stdout("Use filename as response file: -r, -R, --response").newline;
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19 }
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20
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21 void main(char[][] cmdlArgs)
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22 {
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23 char[][] implicitArguments = ["files"];
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24
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25 char[][][] argumentAliases;
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26 argumentAliases ~= ["help", "?"];
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27 argumentAliases ~= ["cool", "C", "c"];
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28 argumentAliases ~= ["response", "R", "r"];
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29
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30 auto args = new Arguments(cmdlArgs, implicitArguments, argumentAliases);
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31
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32 bool fileExistsValidation(char[] arg)
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33 {
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34 bool rtn;
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35 FilePath argFile = new FilePath(arg);
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36 rtn = argFile.exists;
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37 if (!rtn)
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38 Stdout.format("Specified path does not exist: {}", arg).newline;
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39 return rtn;
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40 }
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41
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42 bool singleFileValidation(char[][] args, inout char[] invalidArg)
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43 {
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44 if (args.length > 1)
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45 {
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46 Stdout("Cannot specify multiple paths for argument.").newline;
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47 invalidArg = args[1];
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48 }
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49 else
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50 return true;
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51 return false;
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52 }
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53
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54 args.addValidation("response", &fileExistsValidation);
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55 args.addValidation("response", &singleFileValidation);
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56 args.addValidation("files", true, true);
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57
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58 bool argsValidated = true;
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59 try
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60 args.validate;
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61 catch (ArgumentException ex)
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62 {
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63 if (ex.reason == ArgumentException.ExceptionReason.MISSING_ARGUMENT)
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64 Stdout.format("Missing Argument: {} ({})", ex.name, ex.msg).newline;
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65 else if (ex.reason == ArgumentException.ExceptionReason.MISSING_PARAMETER)
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66 Stdout.format("Missing Parameter to Argument: {} ({})", ex.name, ex.msg).newline;
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67 else if (ex.reason == ArgumentException.ExceptionReason.INVALID_PARAMETER)
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68 Stdout.format("Invalid Parameter: {} ({})", ex.name, ex.msg).newline;
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69 Stdout.newline;
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70 argsValidated = false;
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71 }
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72
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73 if ((!argsValidated) || ("help" in args))
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74 usage();
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75 else
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76 {// ready to run
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77 if ("response" in args)
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78 {
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79 Stdout(args["response"][0]).newline;
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80 auto file = new FileConduit(args["response"][0]);
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81 auto lines = new LineIterator!(char)(file);
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82 char[][] arguments;
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83 foreach (line; lines)
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84 arguments ~= line.dup;
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85 args.parse(arguments, implicitArguments, argumentAliases);
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86 }
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87 if ("cool" in args)
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88 {
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89 Stdout ("Listing the files to be actioned in a cool way.").newline;
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90 foreach (char[] file; args["files"])
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91 Stdout.format("{}", file).newline;
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92 Stdout ("Cool and secret action performed.").newline;
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93 }
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94 if ("x" in args)
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95 Stdout.format("User set the X factor to '{}'", args["x"]).newline;
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96 }
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97 }
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