Index of Command-Line Options¶ ↑

These are the IRB command-line options, with links to explanatory text:

• -d: Set $DEBUG and $VERBOSE to true.

• -E ex[:in]: Set initial external (ex) and internal (in) encodings (same as ruby -E).

• -f: Don’t initialize from configuration file.

• -I dirpath: Specify $LOAD_PATH directory (same as ruby -I).

• -r load-module: Require load-module (same as ruby -r).

• -U: Set external and internal encodings to UTF-8.

• -w: Suppress warnings (same as ruby -w).

• -W[level]: Set warning level; 0=silence, 1=medium, 2=verbose (same as ruby -W).

• --autocomplete: Use auto-completion.

• --back-trace-limit n: Set a backtrace limit; display at most the top n and bottom n entries.

• --colorize: Use color-highlighting for input and output.

• --context-mode n: Select method to create Binding object for new workspace; n in range 0..4.

• --echo: Print (echo) return values.

• --extra-doc-dir dirpath: Add a documentation directory for the documentation dialog.

• --inf-ruby-mode: Set prompt mode to :INF_RUBY (appropriate for inf-ruby-mode on Emacs); suppresses –multiline and –singleline.

• --inspect: Use method inspect for printing (echoing) return values.

• --multiline: Use the multiline editor as the input method.

• --noautocomplete: Don’t use auto-completion.

• --nocolorize: Don’t use color-highlighting for input and output.

• --noecho: Don’t print (echo) return values.

• --noecho-on-assignment: Don’t print (echo) result on assignment.

• --noinspect: Don’t se method inspect for printing (echoing) return values.

• --nomultiline: Don’t use the multiline editor as the input method.

• --noprompt: Don’t print prompts.

• --noscript: Treat the first command-line argument as a normal command-line argument, and include it in ARGV.

• --nosingleline: Don’t use the singleline editor as the input method.

• --noverbose: Don’t print verbose details.

• --prompt mode, --prompt-mode mode: Set prompt and return formats; mode may be a pre-defined prompt or the name of a custom prompt.

• --script: Treat the first command-line argument as the path to an initialization script, and omit it from ARGV.

• --simple-prompt, --sample-book-mode: Set prompt mode to :SIMPLE.

• --singleline: Use the singleline editor as the input method.

• --tracer: Use Tracer to print a stack trace for each input command.

• --truncate-echo-on-assignment: Print (echo) truncated result on assignment.

• --verbosePrint verbose details.

• -v, --version: Print the IRB version.

• -h, --help: Print the IRB help text.

• --: Separate options from arguments on the command-line.