Emojis - Ruby Command Line Options 🖥️ for ICM InfoWorks Ultimate

 Command Line Options 🖥️

Ruby interpreter accepts the following command-line options (switches). They're largely similar to Perl's options.

• -0digit 📖

  • Sets the input record separator ($/) as an octal number. No digits mean the null character is the separator. -00 initiates Ruby's paragraph mode. -0777 makes Ruby process an entire file as one string.

• -a 🚀

  • Activates auto-split mode with -n or -p. In this mode, Ruby runs $F = $_.split at the start of each loop.

• -c ✅

  • Ruby checks the script's syntax and exits. If there's no error, "Syntax OK" is displayed.

• -Kc 🈸

  • Defines KANJI (Japanese character) code-set.

• -d, --debug 🔍

  • Enables debug mode. $DEBUG is set to true.

• -e script 📜

  • Takes script from the command-line. Ruby won't look for a script filename in the arguments with this switch.

• -F regexp 🔗

  • Determines input field separator ($;).

• -h, --help ❓

  • Shows a summary of the options.

• -i extension 📝

  • Specifies in-place-edit mode. If provided, the extension is added to the old filename for backup.

  Example:

  % echo matz > /tmp/junk	
  % cat /tmp/junk	
  matz
  % ruby -p -i.bak -e '$_.upcase!' /tmp/junk
  % cat /tmp/junk
  MATZ
  % cat /tmp/junk.bak 
  matzk.bak
  matz
  

• -I directory 📂

  • Tells Ruby where to load library scripts. This path is added to the load-path variable ($:).

• -l 🔚

  • Enables automatic line-ending processing. It sets $\ to the value of $/ and uses chop! on every line when used with -n or -p.

• -n 🔄

  • Makes Ruby assume a loop around your script, similar to sed -n or awk.

• -p 🖨️

  • Similar to -n, but prints the value of variable $_ at each loop's end.

• -r filename 📁

  • Requires Ruby to load the file. Useful with -n or -p switches.

• -s 🔄

  • Enables parsing for switches after the script name but before any filename arguments.

• -S 🔍

  • Makes Ruby use the PATH environment variable to search for the script.

• -T [level] 🛡️

  • Enables "taint" checks. If a level is specified, it sets $SAFE to that level.

• -v, --verbose 🗣️

  • Enables verbose mode. Ruby will print its version at the start.

• --version 🆚

  • Displays Ruby's version.

• -w 📢

  • Enables verbose mode without the version message. Sets $VERBOSE to true.

• -x[directory] 🗺️

  • Indicates the script is embedded in a message.

• -X directory 🗺️

  • Makes Ruby switch to the specified directory.

• -y, --yydebug 🐛

  • Enables compiler debug mode. Useful for debugging the Ruby interpreter itself.

Parent topic: ICM Exchange for Autodesk ⚙️🔄