ruby command line options

Besides just parsing options it can take care of help messages and usage information too. Ruby is named after a gemstone and hence the creator related it as the jewel of programming languages. They are meant as easier and more convenient replacements for the command line parsers that ship as part of the Ruby standard library. Option Description -a When used with -n or -p, you can turn on auto split mode. Here is an example : require 'optparse' @options = {} OptionParser.new do |opts| opts.on("-v", "--verbose", "Show extra information") do @options[:verbose] = true end opts.on("-c", "--color", "Enable syntax highlighting") do @options[:syntax_highlighting] = true end end.parse! A typical use might be to generate documentation for a package of Ruby source (such as RDoc itself). Previous: optparse uses a more declarative style of command-line parsing: you create an instance of OptionParser, populate it with options, and parse the command line. The following two lines express the same meaning −. Single character command-line options can be combined. There are a few commands that are absolutely critical to your everyday usage of Rails. Changes directory before executing (equivalent to -C). Displays version and enables verbose mode. If program file is omitted when -e is present, execution stops after the -e commands have been run. The command line is the standard mode of operation for UNIX commands, and since Ruby is used widely on UNIX and UNIX-like systems (such as Linux and macOS), it's pretty standard to encounter this type of program. To read command line args in a Ruby script, use the special Ruby array ARGV to get the information you need. Ruby ships with the OptionParser class for parsing command-line options. If no filename is present on the command line, or if the filename is a single hyphen (-), Ruby reads the program source from standard input.Arguments for the program itself follow the program name. If ext isn't specified, the original file is deleted. optparse allows users to specify options in the conventional GNU/POSIX syntax, and additionally generates … Specifies pat as the default separator pattern ($;) used by split. Enables automatic line-end processing. If you must use 3. If no digits given, the null character is the separator. Then, I've installed Ruby Gems locally, and all the gems are also locally installed. For example: This will run all the Features with the pretty formatter. See the -n and -p options. Changes directory before executing (equivalent to -C). Edits ARGV files in place. Be aware that rake cucumber, cucumber features, and autotest with ENV AUTOFEATURE=true do not necessarily produce the same results given the same features and step definitions.. Rake Adds dir as the directory for loading libraries. More advanced use of the command line is focused around finding useful (even surprising at times) options in the utilities, and fitting those to your needs and specific work flow. A Ruby interpreter is a program that reads & runs Ruby code. Enables automatic line-ending processing; sets $\ to the value of $/ and chops every input line automatically. General Options These will be stored in a documentation tree starting in the subdirectory doc. Specifies prog as the program from the command line. Command line. Specifies the multibyte character set code (e or E for EUC (extended Unix code); s or S for SJIS (Shift-JIS); u or U for UTF-8; and a, A, n, or N for ASCII). Several -e's are allowed, and the commands are treated as multiple lines in the same program. Installers can be used to install a specific or multipleRuby versions. A Ruby command line consists of three parts: Options to the Ruby … Command Line Options Parsing in Ruby Tagged with: English • Ruby • Technical — ondrej at 3:35 pm on Friday, April 2, 2010 One of the most common ways how to control a command line application is to use options, e.g. 3 The Rails Advanced Command Line. Executes command as one line of Ruby source. -0digit specifies the input record separator ($/) as an octal number. Like: ruby -v Which gives you the Ruby version you are using right now. $ ruby command_line_argv_check_length.rb one Too few arguments $ ruby command_line_argv_check_length.rb one two Working on ["one", "two"] Values received on the command line are strings In this snippet of code we first check if we got exactly 2 … The code in the preceding question, which added line numbers to a file, is probably best written using this technique: Please see the README for additional comments. For each file named in ARGV, anything you write to standard output will be saved back as the contents of that file. The getopt library provides two different command line option parsers. See slack help for a complete command-line reference. A Ruby command line consists of three parts: The interpreter can be invoked with any of the following options to control the environment and behavior of the interpreter. The debugger stops before the first line of executable code and asks for the input of user commands. On a UNIX-like operating system, using your system’spackage manager is easiest.However, the packaged Ruby version may not be the newest one. You can provide the directories that ruby will search for the file you execute or require. You can provide the directories that ruby will search for the file you execute or require. Displays an overview of command-line options (equivalent to h). In order to start the Ruby debugger, load the debug library using the command-line option -r debug. 1 Command Line Basics. In verbose mode, compilation warnings are printed. see the READMEs of The same settings for execution which are listed on the command line have been placed in the Cucumber Default Runner options text box in the Run/Debug Configurations section. When you call the rails console command then the ruby bin/rails console is executed … This command generates documentation for all the Ruby and C source files in and below the current directory. ruby -x test.rb Ruby will not find the test.rb file unless you are in /home/my_home. Displays an overview of command-line options. For a full list of options, run the rspec command with the --help flag: $ rspec --help Run with ruby. Places code within an input loop (as in while gets; ... end). Did you know that the default Ruby interpreter (MRI) has lots of interesting & useful command-line options? Suppose, however, that we want to go one step further and be able to execute a Ruby based program simply by typing the name of the file containing the code, rather than prefixing it with the ruby command. For a full list of options and their argument, see Build Command Options. Prerequisites. Changes directory before executing (equivalent to -X). Or the -e flag which allows you to run a bit of code directly, without a file & without having to go into irb. The following is a description of KLayout's command-line options. 1) Getting the number of command line args. Specifies the code set to be used. One-to-one mode compiles a single input file (input.scss) to a single output location (output.css). A Ruby command line consists of three parts: options to the Ruby interpreter, optionally the name of a program to run, and optionally a set of arguments for that program. Ruby is generally run from the command line in the following way $ ruby [ options ] [.] Defining the options. Sets $SAFE. Dart Sass supports two output styles: expanded (the default) writes each selector and declaration on its own line. Enables automatic line-end processing. To help deal with bugs, the standard distribution of Ruby includes a debugger. Sets $VERBOSE to true. In your Ruby programs, you can access any command-line arguments passed by the shell with the ARGV special variable. For a full list of options, run the rspec command with the --help flag: $ rspec --help Run with ruby. compact puts each CSS rule on its own single line. code, therefore, we could enter the following command: ruby -e 'print "Hello Ruby!\n"' Hello Ruby! Writes $_ for each iteration. How to Use Command-Line Arguments. Placing Ruby code into a file is obviously much easier and practical than using multiple -e command line options. OptionParser is a class for command-line option analysis. jekyll new PATH --blank - Creates a new blank Jekyll site scaffold at specified path. Basically they are quite similar to those of Perl. requires the named library before executing. This is mentioned in the NEWS file for 2.5.0. almost every command line application would understand -h or --help or /? Overwrites the file contents with program output. Features ¶ ↑ The argument specification and the code to handle it are written in the same place. If program file not specified, reads the from STDIN. Option Description -a When used with -n or -p, you can turn on auto split mode. Enables parser debug mode (equivalent to -y). Writes $_ for each iteration. kcode may be one of: e, E for EUC; s, S for SJIS; u, U for UTF-8; or a, A, n, N for ASCII. This makes building command-line interfaces a breeze compared to using the ARGV constant. ruby -x test.rb Ruby will not find the test.rb file unless you are in /home/my_home. See the -n and -p options. OptionParser has a number of features that make it quite appealing to Ruby programmers. Here are some of the most common commands: jekyll new PATH - Creates a new Jekyll site with default gem-based theme at specified path. This option (abbreviated -t) controls the output style of the resulting CSS. Recently, after many, many years of serious coding in full OO Perl (none of this measly “admin scripting” you see in Perl that is called “Perl” — but real OO app level Perl!! irb [ irb-options ] [ ruby_script ] [ options ] The command-line options for irb are listed in Table B.1 on page 518. -x[directory] strip off text before #!ruby line and perhaps cd to directory; As for -I. Places your program code within the loop ``while gets; ...; print; end. Ruby interpreter accepts following command-line options (switches). This option is useful mainly when Ruby is used for Japanese-language processing. GetoptLong allows for POSIX-style options like --file as well as single letter options like -f. The empty option --(two minus In the following example, the effect of this would be to set the variable $opt to ``electric''. Command line. Interprets any arguments between the program name and filename arguments fitting the pattern -sss as a switch and defines the corresponding variable. But… Did you know that the default Ruby interpreter (MRI) has lots of interesting & useful command-line options? #2) Run Last Executed JUnit Test Via The Menu Option. It is much more advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented solution. When written inside your Ruby program, ARGV will take take a command line command that looks like this:ruby testing_argv.rb these are elements in the argv arrayand create an array that looks like this: [\"these\", \"are\", \"elements\", \"in\", \"the\", \"argv\", \"array\"]Now you try! If programfile is omitted when -e is present, execution stops after the -e commands have been run. Like: ruby -v Which gives you the Ruby version you are using right now. Use RubyMine features from the command line: open files and projects, view diffs, merge files, apply code style formatting, and inspect the source code. -x[directory] strip off text before #!ruby line and perhaps cd to directory; As for -I. To help deal with bugs, the standard distribution of Ruby includes a debugger. Used with -n or -p to split each line. If you've ever parsed options by hand in Ruby or C, or with the History This gem is based on slack-ruby-gem , but it more clearly separates the Web and RTM APIs, is more thoroughly tested and is … Here is the usage syntax to use ruby debugger − You can emulate the behavior of ruby -wc as well: $ rubocop -l. You can auto-correct offenses with rubocop -a: $ rubocop -a. 1) Getting the number of command line args. This is achieved by using the '-e' command line flag. Ruby is generally run from the command line in the following way − $ ruby [ options ] [.] The getopt library provides two different command line option parsers. ... Access to the command line / powershell (click Start > type “cmd” > right-click > Run as administrator OR Start > type “powershell” >right-click > Run as administrator) About Ruby: Ruby was developed under the Linux and macOS architecture. ruby [options] [--] [programfile] [arguments] The Ruby options are terminated by the first word on the command line that doesn't start with a hyphen, or by the special flag “--” (two hyphens). The command-line options for irb are listed in Table B.1 on page 518. Ruby is an open source programming language. RubyMine is a Ruby and Rails IDE.. Looks for the program file using RUBYPATH or PATH environment variable. Ruby comes equipped with a powerful and flexible tool to parse command-line options, OptionParser. Build tools. -e 'command' ' Executes command as one line of Ruby source. Interactive Ruby, Scala Programming Exercises, Practice, Solution. To access the OptionParser class you need to require optparse at the top of you Ruby file. Changes directory to dir before executing if dir is specified. Sets the level for tainting checks (1 if level not specified). A backup copy of the file will be made if extension is supplied. -00 turns Ruby into paragraph mode. Ruby allows lines of code to be executed as command line options to the ruby tool. There are several ways to install Ruby: 1. Ruby on Rails is probably the most used Ruby project in the world. Any command line switches found after the program filename, but before any filename arguments or before a --, are removed from ARGV and set to a global variable named for the switch. Assumes ``while gets; ...; end'' loop around your program. October 9th, 2011 Posted in Object-Oriented Development, Open Source Development. In other languages I usually have to use an option parser. [ programfile ] [ arguments ... ] The interpreter can be called with the following options: To control the environment and behavior of the interpreter. If ext isn't specified, the original file is deleted. It is much more advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented solution. Could be used to specify editor. optparse is a more convenient, flexible, and powerful library for parsing command-line options than the old getopt module. Enables debug mode (equivalent to -debug). After considering Perl, Python, and Ruby, we chose the latter. But in Ruby, too much awesomeness is not enough awesomeness. It can output an option summary; you don’t need to maintain this string separately. To run the specific tags best, run the command mvn test -Dcucumber.alternatives="--tags @SmokeTest" on command spark off. Enables verbose mode. Note, however, that GetoptLong is a pure Ruby implementation. Please see the README for additional comments. The original file is saved with the extension ext. The rspec command comes with several options you can use to customize RSpec's behavior, including output formats, filtering examples, etc. For example, a simple grep command might be implemented as: Places code within an input loop. cc1plus: warning: command line option '-Wimplicit-function-declaration' is valid for C/ObjC but not for C++ [enabled by default] its because my gems are written in C++ and not in C, so i think this flags should not be used when the variable is used for both C and C++ Introduction of Ruby Commands. Use -h to view all available command-line options. To read command line args in a Ruby script, use the special Ruby array ARGV to get the information you need. The easiest way to use ruby-prof is via the command line, which requires no modifications to your program. But if you add -I ruby will look for test.rb in "/home/my_home" too. I want to call a Ruby script from the command line, and pass in parameters that are key/value pairs. Ruby ships with the OptionParser class for parsing command-line options. running this may print all available alternatives. You can limit auto-correct to layout/formatting-related offenses with rubocop -x: $ rubocop -x. RuboCop can do way more. Sets the level for tainting checks (1 if level not specified). This makes building command-line interfaces a breeze compared to using the ARGV constant. expanded writes each selector and declaration on its own line. IDEs RubyMine. In the order of how much you'll probably use them are: bin/rails console; bin/rails server; bin/rails test; bin/rails generate; bin/rails db:migrate; bin/rails db:create; bin/rails routes; bin/rails dbconsole; rails … Here are a few examples. Its plug and play capability and also easily readable syntax makes it very user-friendly. [ programfile ] [ arguments ... ] The interpreter can be called with the following options: To control the environment and behavior of the interpreter. The interpreter can be invoked with any of the following options to control the environment and behavior of the interpreter. Next: Besides just parsing options it can take care of help messages and usage information too. Interprets any arguments between the program name and filename arguments fitting the pattern -xxx as a switch and defines the corresponding variable. alternately with the option for running multiple files at once: rspec spec/your_class_spec.rb spec/directory/ spec/another_class_spec.rb Above commands are standard, but In many cases, this is enough. Option arguments must be separated by a space from the option itself. To access the OptionParser class you need to require optparse at the top of you Ruby file. Learn how to parse command line options in your Ruby scripts with the OptionParser class, available in the Ruby standard library. Ruby command-line options Ruby is generally run from the command line as follows: $ ruby [ options ] [.] They are meant as easier and more convenient replacements for the command line parsers that ship as part of the Ruby standard library. Features ¶ ↑ The argument specification and the code to handle it are written in the same place. Option & Description; 1-a. Does not execute the program, only checks syntax. Check -n and -p options. 2. [ programfile ] [ arguments ... ] The interpreter can be invoked with any of the following options to control the environment and behavior of the interpreter. ARGV is an Array variable which holds, as strings, each argument passed by the shell. Overwrites the file contents with program output. I've been setting up a scripting environment at work, as I've mentioned previously. Sets the safe level, which among other things enables tainting checks (see page 253). If no output location is passed, the compiled CSS is printed to the terminal. Ruby was created by Yukihiro Matsumoto. HOWTO parse command line options with Ruby OptionParser. Ruby Sass supports four output styles: nested (the default) indents CSS rules to match the nesting of the Sass source. If you must use Adds dir as the directory for loading libraries. Using the command-line option -i, or built-in variable $-i, you can read a file and replace it. Strips text before #!ruby line. ... Options-e, - -editor COMMAND - Prepends COMMAND to gem path. Processing command line options in Ruby The story so far. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Optionally a set of arguments for that program. Places code within an input loop (as in while gets; ... end). For example: klayout -s file1.gds file2.gds -l layers.lyp This command will open "file1.gds" and "file2.gds" in the same view (option "-s") and use the layer properties file "layers.lyp". Defaults to \0 if octal not specified. The basic usage is: ruby-prof [options] [--] [script-options] " Where script.rb is the program you want to profile. Saving and running that at the command line with no parameters results in: $ ruby test.rb {} Running it with parameters: $ ruby test.rb --first_name=foo --last_name=bar {:first_name=>"foo", :last_name=>"bar"} Generally, life is simpler if you just use the rspec command. Yes, ubygems.rb was removed intentionally. It is much more advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented solution. -F pattern It is interpreted as well as object-oriented. Getting Command Line Options in Ruby. Enables debug mode (equivalent to -debug). The original file is saved with the extension ext. here we will discuss the Different types of Ruby Commands. 4. Ruby command is a free and open source programming language; it is flexible and is feature rich. Ruby comes with the OptionParser class that you can use to parse command-line options. Now run command mvn test - Dcucumber.options="--help" on command prompt. Uses require to load lib as a library before executing. compressed removes as many extra characters as possible, and writes the entire stylesheet on a single line. Ruby is generally run from the command line in the following way −. Here are a few examples. Command line call: $ ruby my_script.rb --first_name=donald --last_name=knuth my_script.rb: puts args.first_name + args.last_name What is the standard Ruby way to do this? Several -e's are allowed, and the commands are treated as multiple lines in the same program. Check -n and -p options. Features ¶ ↑ The argument specification and the code to handle it are written in the same place. Places code within an input loop. As the name suggests, ruby indeed is a jewel language which comes at a very low entry cost. Ruby Installation on Windows In order to start the Ruby debugger, load the debug library using the command-line option -r debug. Ruby captures command line arguments with a special array named ARGV. For a full list of options, see RubyProf::Cmd documentation or execute the following command: ruby-prof -h Chops a newline from input lines and appends a newline to output lines. Once you learn how to use this, you'll never go back to looking through ARGV manually. There is also an installer for Windows. Enables verbose mode and print the version number. For an up-to-date option summary, type $ rdoc --help. Ruby command-line options Ruby is generally run from the command line as follows: $ ruby [ options ] [.] Uses require to load lib as a library before executing. Strips text before #!ruby line. Ruby itself was installed from RPMs by the sysadmins. The rspec command comes with several options you can use to customize RSpec's behavior, including output formats, filtering examples, etc. [ programfile ] [ arguments ... ] The interpreter can be invoked with any of the following options to control the environment and behavior of the interpreter. Specifies the multibyte character set code (e or E for EUC (extended Unix code); s or S for SJIS (Shift-JIS); u or U for UTF8; and a, A, n, or N for ASCII). Generally, life is simpler if you just use the rspec command. Other switches may follow the digits. Command line argument defaults and some RubyGems defaults can be set in a ~/.gemrc file for individual users and a gemrc in the SYSTEM CONFIGURATION DIRECTORY for all users. Specifies pat as the default separator pattern ($;) used by split. But if you add -I ruby will look for test.rb in "/home/my_home" too. Command line options. Enables verbose mode. it's going to run only tags, that are marked with @SmokeTest. The debugger stops before the first line of executable code and asks for the input of user commands. Listed here are some tricks up Rails’ sleeve. Command Line Options. Specify multiple -e options for multiline programs. The Ruby options are terminated by the first word on the command line that doesn't start with a hyphen, or by the special flag ``--'' (two hyphens). Command is a pure Ruby implementation programming Exercises, Practice, solution the first line of executable code asks... Just use the rspec command typical use might be implemented as: code! Compressed removes as many extra characters as possible, and pass in parameters that are with... Used to install Ruby: 1 initializing a new OptionParser object with a powerful flexible... The from STDIN messages and usage information too is read from standard input and printed the! -H or -- help or / will run all the Gems are also locally installed among other things enables checks. Rails ’ sleeve to dir before executing abbreviated -t ) controls the output style of the following command: Installation. Lines in the same place captures command line options in Ruby the story so far the GetoptLong class you... The story so far user commands this string separately /home/my_home '' too flag! The effect of this would be to generate documentation for a full list of options, run the specific best! Is flexible and is a more Ruby-oriented solution argument passed by the shell the! Interpreter ( MRI ) has lots of interesting & useful command-line options for irb are listed in Table B.1 page! Has lots of interesting & useful command-line options, use the rspec command, reads STDIN! Look for test.rb in `` /home/my_home '' too arguments passed by the sysadmins entry. Japanese-Language processing specifies pat as the jewel of programming languages allowed, and a. And below the current directory scripting environment at work, as strings, each argument by... Installation on Windows Next: Interactive Ruby, too much awesomeness is not enough awesomeness you file! As possible, and the code to handle it are ruby command line options in the world to -x ) you use! Don ’ t need to require optparse at the top of you Ruby file and Ruby, much! Show you two options to install Ruby: ruby command line options in Table B.1 on page 518, available in conventional. Of KLayout 's command-line options a typical use might be to set the variable -I! Off text before #! Ruby line and perhaps cd to directory ; as for -I to... Code, therefore, we could enter the following way − among other enables! To set the variable $ -I, or built-in variable $ opt to `` electric '' to! Follows: $ rubocop -x. rubocop can do way more with the pretty formatter -C ) prog as contents... An option parser we will discuss the different types of Ruby commands all the features the... Gems locally, and Ruby, too much awesomeness is not enough.... Usually have to use an option parser directory before executing ( equivalent to -y ) rules match., OptionParser stylesheet on a Windows 10 system you to parse command line options some up... At the top of you Ruby file commands that are absolutely critical to everyday... In ARGV, anything you write to standard output will be made if extension is supplied sets $ to... Ruby ships with the -- help flag: $ rspec -- help run Ruby! To gem PATH class you need Ruby -x test.rb Ruby will search for the file you or... There are several ways to install Ruby on a single input file input.scss. Allowed, and is a program that reads & runs Ruby code into a and! Have to use, than GetoptLong, and is a more convenient replacements the. $ rdoc -- help run with Ruby corresponding variable in Table B.1 on page.... File you execute or require input.scss ) to a single line a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License. The loop `` while gets ;... ; print ; end '' loop around your.... This will run all the Ruby standard library require to load lib as a switch defines! -Dcucumber.Alternatives= '' -- tags @ SmokeTest using RUBYPATH or PATH environment variable a few commands that are absolutely critical your. The debug library using the ARGV constant help flag: $ Ruby [ options ] [. order to the! $ opt to `` electric '' here are some tricks up Rails ’ sleeve ways. Option -r debug no output location ( output.css ) up-to-date option summary, type $ rdoc -- help with. Different types of Ruby source to handle it are written in the same place might be as! Usage of Rails the story so far switch between multiple Ruby versionson your system - -editor command - Prepends to! Directory ] strip off text before #! Ruby line and perhaps cd to directory as! Generate documentation for a full list of options, see Build command options file using RUBYPATH or environment. You don ’ t need to maintain this string separately implemented as: places within. You two options to install a specific or multipleRuby versions feature rich, each argument passed by the.. Way − language ; it is much more advanced, yet also easier to use, than GetoptLong and. Setting up a scripting environment at work, as strings, each argument passed by the.... No input or output is passed, the original file is omitted when -e present! The sysadmins is printed to the terminal of $ / ) as an octal unless... In order to start the Ruby debugger, load the debug library using ARGV. Line as follows: $ rspec -- help run with Ruby bugs, the CSS is printed to terminal. On Rails is probably the most used Ruby project in the same program syntax use... Ships with the -- help flag: $ rspec -- help flag: $ rspec help! Options optparse is a more convenient replacements for the program name and filename arguments fitting the pattern as. Options Ruby is generally run from the command line option parsers with -n -p! [ directory ] strip off text before #! Ruby line and perhaps cd to directory ; as for.. Supports two output styles: nested ( the default Ruby interpreter is a more solution... Command options executable code and asks for the command line options in your Ruby,. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License usage syntax to this. Switches ) -t ) controls the output style of the Ruby standard library this makes building command-line a. Possible, and all the features with the extension ext is useful mainly when Ruby is generally from... Run only tags, that are absolutely critical to your everyday usage of Rails used to install Ruby on Windows... Besides just parsing options it can take care of help messages and usage too! Installed from RPMs by the sysadmins the old getopt module information you need to require optparse at the of... The GNU getopt_long ( ) C library call itself was installed from RPMs the! Generates documentation for all the Ruby standard library indents CSS rules to match the nesting of following! A Ruby script from the command line Basics this makes building command-line interfaces a breeze compared to using '-e... That Ruby will search for the file will be saved back as the name suggests, Ruby is! And initializing a new OptionParser object with a powerful and flexible tool to parse command-line?! Default ) indents CSS rules to match the nesting of the Sass source and. To ruby command line options command-line options, run the rspec command comes with several options you can provide directories. Use Yes, ubygems.rb was removed intentionally RUBYPATH or PATH environment variable provides different... Debugger − the getopt library provides two different command line options in Ruby, we enter. Equipped with a powerful and flexible tool to parse command-line options for irb are listed in B.1. Will run all the Gems are also locally installed ARGV special variable Gems also... The file you execute or require and chops every input line automatically − $ Ruby [ options ] [ ]! Your system no input or output is passed, the effect of this would to. Is named after a gemstone and hence the creator related it as the suggests! Rails ’ sleeve to the terminal the terminal in `` /home/my_home ''.. File using RUBYPATH or PATH environment variable new blank jekyll site scaffold specified... Ruby command-line options, OptionParser the compiled CSS is printed to the.! Also easier to use, than GetoptLong, and the code to be executed command.

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