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Pods/BRLOptionParser/README.markdown
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# BRLOptionParser [![Build Status][1]][2]
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A short wrapper for [getopt_long(3)][3] (and getopt_long_only(3)).
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[1]: https://img.shields.io/travis/stephencelis/BRLOptionParser.svg?style=flat
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[2]: https://travis-ci.org/stephencelis/BRLOptionParser
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[3]: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/getopt_long.3.html
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## Install
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With [CocoaPods][4]:
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``` rb
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# Podfile
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pod 'BRLOptionParser', '~> 0.3.1'
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```
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[4]: http://cocoapods.org
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## Example
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``` objc
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// main.m
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#import <BRLOptionParser/BRLOptionParser.h>
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int main(int argc, const char * argv[])
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{
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@autoreleasepool {
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NSString *name = @"world";
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BOOL verbose = NO;
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BRLOptionParser *options = [BRLOptionParser new];
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[options setBanner:@"usage: %s [-n <name>] [-vh]", argv[0]];
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[options addOption:"name" flag:'n' description:@"Your name" argument:&name];
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[options addSeparator];
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[options addOption:"verbose" flag:'v' description:nil value:&verbose];
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__weak typeof(options) weakOptions = options;
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[options addOption:"help" flag:'h' description:@"Show this message" block:^{
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printf("%s", [[weakOptions description] UTF8String]);
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exit(EXIT_SUCCESS);
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}];
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NSError *error = nil;
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if (![options parseArgc:argc argv:argv error:&error]) {
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const char * message = error.localizedDescription.UTF8String;
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fprintf(stderr, "%s: %s\n", argv[0], message);
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exit(EXIT_FAILURE);
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}
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if (verbose) {
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fprintf(stderr, "(Preparing to say hello...)\n");
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}
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printf("Hello, %s!\n", name.UTF8String);
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}
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return EXIT_SUCCESS;
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}
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```
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In practice:
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```
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$ hello
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Hello, world!
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$ hello -h
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usage: hello [-n <name>] [-vh]
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-n, --name Your name
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-v, --verbose
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-h, --help Show this message
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$ hello -n
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hello: option `-n' requires an argument
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$ hello --name Stephen
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Hello, Stephen!
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$ hello -vngoodbye
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(Preparing to say hello...)
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Hello, goodbye!
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$ hello --goodbye
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hello: unrecognized option `--goodbye'
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```
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## License
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BRLOptionParser is available under the MIT license. See the LICENSE file
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for more information.
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