Execution Commands

Cheatsheet


# --- Running commands and services

run 'pwd'
run! 'pwd' # and exit
run_bg 'rails server'
run_bg 'rails server', log: 'my.log', pid: 'myserver'
stop_bg 'myserver'

# --- Before / After run hooks

before_run do |command|
  command.gsub /^(rails|rake|cucumber)/, "bin/\\1"
end

after_run do |command|
  puts "Finished #{command}"
end

# --- Configuration

Runfile.setup do |config|
  config.pid_dir = 'tmp/pid'
  config.quiet   = true
end

# or...

Runfile.pid_dir = 'tmp'

Reference

run string

Print and run a command. Wait until it is done and continue. This is executed using system. If Runfile.quiet is true, it will not echo the command to the console.

Example:

run "rails server -b* -p3000"

run! string

Print and run a command, then exit. This is executed using exec. If Runfile.quiet is true, it will not echo the command to the console.

Examples:

run! "rails server -b* -p3000"
puts "this message will never be shown"

run_bg string [, options]

Run a command in the background, which you can later stop with stop_bg.

Available options are:

  • pid - provide a string that will be used to name the PID file. This is the string you will later use in stop_bg. All PID files will be stored in the working directory, or in Runfile.pid_dir.
  • log - provide a filename that will be used to log the output.

Examples:

run_bg 'some/long-running/process'
run_bg 'some/long-running/process', log: 'my.log', pid: 'daemon'

stop_bg string

Stop a command started with 'run_bg'. Provide the name of he pid file you used in 'run_bg'

Example:

stop_bg 'server'

before_run { block }

Intercept each call before executed. Can be used to modify the command, run something before it, or cancel it altogether.

Your block receives the command as argument, and should return a command to run or false to stop execution.

Examples:

# Prefix the command with "bin/" if it is rails, rake or cucumber
before_run do |command|
  cmd.gsub /^(rails|rake|cucumber)/, "bin/\\1"
end

# Abort the command execution based on the value of an environment 
# variable
before_run do |command|
  ENV['PREVENT_EXECUTION'] ? false : command
end

after_run { block }

Intercept each call before it exits. Note this is only useful with run and run_bg but not with run! which exits immediately after execution.

Examples:

after_run do |command|
  puts "Finished #{command}"
end

Configuration

You can configure several aspects of how these commands behave.

Configuration can be done in one of two ways. Either use the direct syntax: Runfile.option = value, or provide a block:

Runfile.setup do |config|
  config.option = value
end

Add the configuration anywhere in your Runfile (either inside an action or outside, at the beginning of the file).

pid_dir - configure folder for PID files

PID files are stored in the working directory by default.

Runfile.pid_dir = './tmp/pids'

quiet - run without echoing the command

By default, calls to run will show the command before running it. Set quiet to true to change that.

Example:

Runfile.quiet = true

Example

See this example file sample usage or this feature file to get an idea of what is possible with this extension.