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Contents
require "open3"
require "geny/error"
module Geny
module Actions
# Utilities for executing shell commands
class Shell
# Create a new shell
# @param ui [UI]
def initialize(ui:)
@ui = ui
end
# Run a shell command and return it's output
# @raise [ExitError] when the command exits with a non-zero status
# @return [String]
#
# @example
# shell.capture("echo", "hello") #=> "hello"
def capture(*args, **opts)
cmd = build_command(*args, **opts)
cmd_str = stringify_command(args)
out, _err, status = Open3.capture3(*cmd)
assert_success!(status, cmd_str)
out.chomp
rescue Errno::ENOENT
raise ExitError.new(command: cmd_str, code: 127)
end
# Run a shell command
# @raise [ExitError] when the command exits with a non-zero status
#
# @example
# shell.capture("echo", "hello") # prints "hello"
def run(*args, verbose: true, **opts)
cmd = build_command(*args, **opts)
cmd_str = stringify_command(args)
@ui.status("run", cmd_str) if verbose
Kernel.system(*cmd)
assert_success!($?, cmd_str)
end
private
def build_command(*args, env: nil, **opts)
[*env, *args, **opts]
end
def stringify_command(args)
args.map { |arg| arg.match?(/\s/) ? arg.inspect : arg }.join(" ")
end
def assert_success!(status, cmd)
unless status.success?
raise ExitError.new(command: cmd, code: status.exitstatus)
end
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems