NAME¶
PRY - A Reference to the PRY repl.
Synopsis¶
pry [
--version] [
--exec] [
--no-pager]
[
--no-history] [
--no-color] [
-f] [
--no-plugins]
[
--installed-plugins] [
--simple-prompt] [
--require
file] [
-I] [
--context] [
--help]
DESCRIPTION¶
Pry is a powerful alternative to the standard IRB shell for Ruby. It is written
from scratch to provide a number of advanced features.
HOMEPAGE¶
http://pry.github.com/
OPTIONS¶
- -v --version
- Prints the version of Pry.
- -e --exec
- Executes argument in context before the session starts.
- --no-pager
- Disable pager for long output.
- --no-history
- Disable history loading.
- --no-color
- Disable syntax highlighting for session.
- -f
- Prevent loading of ~/.pryrc for session.
- --no-plugins
- Suppress loading of plugins.
- --installed-plugins
- List installed plugins.
- --simple-prompt
- Enable simple prompt mode (eg, >>).
- -r --require
- Require a ruby script at startup.
- -I
- Add a path to the $LOAD_PATH
- -c --context
- Start the session in the specified context. Equivalent to
context.pry in a session.
FILES¶
~/.pryrc Personal pry initialization
EXAMPLES¶
Basic Usage¶
$ pry
[1] pry(main)>4 + 5
=> 9
[2] pry(main)> def hello_world
[2] pry(main)* puts "Hello, World!"
[2] pry(main)* end
=> nil
[3] pry(main)> hello_world
Hello, World!
=> nil
Command Line Interaction¶
Prefix any command you want your shell to execute with a period and pry will
return the results from your shell.
-
-
[1] pry(main)> .date
Fri Nov 11 09:52:07 EST 2011
-
On the command line enter
shell-mode to incorporate the current working
directory into the Pry prompt.
-
-
pry(main)> shell-mode
pry main:/Users/john/ruby/projects/pry $ .cd ..
pry main:/Users/john/ruby/projects $ .cd ~
pry main:/Users/john $ .pwd
/Users/john
pry main:/Users/john $ shell-mode
pry(main)>
-
State Navigation¶
The cd command is used to move into a new object (or scope) inside a Pry
session. When inside the new scope it becomes the self for the session and all
commands and methods will operate on this new self.
-
-
pry(main)> self
=> main
pry(main)> cd Pry
pry(Pry):1> self
=> Pry
pry(Pry):1> cd ..
pry(main)>
-
The ls command is essentially a unified wrapper to a number of Ruby´s
introspection mechanisms, including (but not limited to) the following
methods: methods, instance_variables, constants, local_variables,
instance_methods, class_variables and all the various permutations thereof.
By default typing ls will return a list of just the local and instance variables
available in the current context.
- •
- The -M option selects public instance methods (if available).
- •
- The -m option selects public methods.
- •
- The -c option selects constants.
- •
- The -i option select just instance variables.
- •
- The -l option selects just local variables.
- •
- The -s option modifies the -c and -m and -M options to go up the
superclass chain (excluding Object).
- •
- The --grep REGEX prunes the list to items that match the regex.
-
Source Browsing¶
Simply typing show-method method_name will pull the source for the method and
display it with syntax highlighting. You can also look up the source for
multiple methods at the same time, by typing show-method method1 method2. As a
convenience, Pry looks up both instance methods and class methods using this
syntax, with priority given to instance methods.
-
-
pry(Pry):1> show-method rep
From: /Users/john/ruby/projects/pry/lib/pry/pry_instance.rb @ line 191:
Number of lines: 6
def rep(target=TOPLEVEL_BINDING)
target = Pry.binding_for(target)
result = re(target)
show_result(result) if should_print?
end
-
AUTHORS¶
Pry is primarily the work of John Mair (banisterfiend)