truckle: Truckle, Shortcuts as classes
Denis Knauf
parent
47e55d8cb8
commit
4452a3cf61
5
Makefile
5
Makefile
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@ -1,3 +1,6 @@
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#!/bin/sh
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# vi:set filetype=makefile
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NULL=0 exec make "CALL=$0" "EXE=`which $0`" -f "`which $0`" -- "$@"
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D := /
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PREFIX := /usr/local
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@ -5,7 +8,9 @@ BIN_PREFIX := $(PREFIX)/bin
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all: truckle
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@echo 'Nothing to do :)'
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@echo 'Please run "make install" to install.'
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install: truckle
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install -m 0755 truckle $(D)$(BIN_PREFIX)/truckle
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for c in `./truckle --list-commands`; do ln -fs truckle $(D)$(BIN_PREFIX)/truckle-$${c} ; done
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for c in trdo tresume; do ln -fs truckle $(D)$(BIN_PREFIX)/$${c} ; done
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308
truckle
308
truckle
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@ -20,7 +20,7 @@ class Commands < Hash
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end
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end
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attr_accessor :exe, :prefix, :default_cmd
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attr_accessor :exe, :prefix, :fallback_cmd
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def self.arg_unshift arg, args
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arg = arg.is_a?(Array) ? arg : [arg]
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@ -36,11 +36,16 @@ class Commands < Hash
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r
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end
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def sym_name name
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name.to_s.to_sym
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end
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def on *names, &run
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options = names.last.is_a?(Hash) ? names.pop.dup : {}
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if names.empty?
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@default_cmd = run
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@fallback_cmd = run
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else
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names.each {|name| self[name.to_s.to_sym] = run }
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names.each {|name| self[sym_name name] = run }
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end
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end
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@ -66,9 +71,9 @@ class Commands < Hash
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def run *argv
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c, *argv = self.cmd( argv)
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(self[c] || @default_cmd).call c, *argv
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(self[c] || @fallback_cmd).call c, *argv
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rescue CommandError
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STDERR.puts $!.message
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STDERR.puts $!.message, $!.backtrace
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exit 1
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end
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alias call run
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@ -78,6 +83,11 @@ class Commands < Hash
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end
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end
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# RunCave
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# =======
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#
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# Prepare cave-commands.
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class RunCave
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class CommandExpected <Exception
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end
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@ -138,7 +148,7 @@ class RunCave
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0
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else
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Kernel.system *a
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$? ? $?.exitstatus : 130
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$? && $?.exitstatus
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end
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end
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@ -158,43 +168,92 @@ class RunCave
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end
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def run_exit
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exit run
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exit run || 130
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end
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alias call run_exit
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end
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def pager *args, &exe
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if STDOUT.tty?
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IRB::Pager::pager *args, &exe
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else
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exe.call
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# Truckle
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# =======
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#
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# cave-wrapper
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class Truckle
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class ExecutionError < Exception
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end
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end
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def pagered exe = nil, &block
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exe ||= block
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lambda {|*args| pager { exe.call *args } }
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end
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ENV['LESS'] = "-FR #{ENV['LESS']}"
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argv0 = $0
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cave = RunCave.new
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cmds = Commands.new 'truckle', File.basename(argv0)
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cmds.on {|*args| cave.this(*args).() }
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def markdown_format t, colored = nil
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t = t.gsub( /^\t+/) {|indent| ' '*indent.length}
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if colored
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t.gsub! /^([^\n]+)\n===+/m, "\n«««««« \033[1;4;33m\\1\033[0m »»»»»»"
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t.gsub! /^([^\n]+)\n---+/m, "\n««« \033[1;33m\\1\033[0m »»»"
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t.gsub! /`([^`]+)`/, "\033[1;44m \\1 \033[0m"
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# Calls exe while IRB::Pager redirect output to your PAGER.
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def pager *args, &exe
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if @nopager
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exe.call
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else
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IRB::Pager::pager *args, &exe
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end
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end
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t = t[1..-1] while t.start_with? "\n"
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t
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end
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cmds.on :help, '-h', '--help', &pagered { cmd=cmds.prefix; STDOUT.puts markdown_format(<<EOF, cave.colored?) }
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# Restarts, if not @nosudo and not root yet, your Truckle as root
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def sudo *args, &exe
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if @nosudo or 0 == Process.egid
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exe.call
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else
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exepath = File.join File.dirname( @argv0), @cmds.prefix
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args = [:sudo, exepath, @params, *args].flatten.select{|x|x}.map {|x| x.to_s }
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Kernel.exec *args
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raise ExecutionError, "Can't exec #{args.shelljoin}"
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end
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end
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# Your command will be called - if it will be called - with sudo.
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def sudod exe = nil, &block
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exe ||= block
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lambda {|*args| sudo( *args) { exe.call *args } }
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end
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# Yout command will be called - if it will be called - with pager.
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def pagered exe = nil, &block
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exe ||= block
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lambda {|*args| pager { exe.call *args } }
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end
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# Yout command will be called - if it will be called - with sudo first and second pager.
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#
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# cmds.on :hamster, &sudo_pagered {|cmd, *args| puts "Your hamster said: \"#{args.join ' '}\"" }
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#
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# It is shorter than:
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#
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# cmds.on( :hamster) {|cmd, *args| sudo( cmd, *args) { pager { puts "Your hamster said: \"#{args.join ' '}\"" } } }
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def sudo_pagered exe = nil, &block
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exe ||= block
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lambda {|*args| sudo( *args) { pager { exe.call *args } } }
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end
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def markdown_format t, colored = nil
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t = t.gsub( /^\t+/) {|indent| ' '*indent.length}
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if colored
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t.gsub! /^([^\n]+)\n===+/m, "\n«««««« \033[1;4;33m\\1\033[0m »»»»»»"
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t.gsub! /^([^\n]+)\n---+/m, "\n««« \033[1;33m\\1\033[0m »»»"
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t.gsub! /`([^`]+)`/, "\033[1;44m \\1 \033[0m"
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end
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t = t[1..-1] while t.start_with? "\n"
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t
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end
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def initialize argv0
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ENV['LESS'] = "-FR #{ENV['LESS']}"
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@argv0 = argv0
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@exename = File.basename argv0
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# initialize our program.
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@cave = RunCave.new
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@cmds = Commands.new 'truckle', @exename
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prepare_commands
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end
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def helptext
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cmd = @cmds.prefix
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markdown_format <<EOF, @cave.colored?
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Usage
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=====
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@ -226,6 +285,14 @@ Some commands are not displayed by a pager, but will execute:
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«do» and «resume» are special, to execute the last command:
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truckle resume # | do # cave resume
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trdo # | tresume # shortcuts
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Environment
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===========
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- `DUMMY=1` will prevent any doing. But it will print, which command would be executed, if not DUMMY=1.
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- `NOSUDO=1` will prevent of using sudo, if you are not root.
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- `PAGER=more` will change the pager to more, instead of less.
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Commands
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========
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@ -245,41 +312,148 @@ Most commands are like by cave.
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- `--list-commands` will list all possible commands.
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- `--install-commands` will install all commands as truckle-COMMAND.
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EOF
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end
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cmds.on(:sync) { cave.sync.() }
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cmds.on :search, :show, &pagered {|*args| cave.this(*args).() }
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cmds.on :resolve, &pagered {|*args| cave.resumable!.this(*args).() }
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cmds.on 'fix-linkage', &pagered {|*args|
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cave.resumable!.this *args
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cave.args.push '--', cave.prepare_resume_file
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cave.resumable = false
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cave.()
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}
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cmds.on :remove, &pagered {|cmd, *args| cave.resumable!.uninstall(*args).() }
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cmds.on :upgrade, &pagered {|cmd, *args| cave.resumable!.resolve( '-c', :world, *args).() }
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cmds.on(:install) {|cmd, *argv| cave.resumable!.resolve( '-x', *argv).() }
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cmds.on(:uninstall) {|cmd, *argv| cave.resumable!.uninstall( '-x', *argv).() }
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def prepare_commands
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cmds, cave = @cmds, @cave
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cmds.on(:do, :resume) {|cmd, *args| cave.resumable!.resume( *args).() }
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# default: simple use cave
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cmds.on &sudod {|*args| cave.this(*args).() }
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cmds.on('--list-commands') { puts cmds.map{|k,v|k} }
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cmds.on '--install-commands' do
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dir, exe = File.split( argv0)
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cmds.each do |k,v|
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k = k.to_s
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k = File.join dir, "#{cmds.prefix}-#{k}"
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File.symlink exe, k unless File.exist? k
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cmds.on :help, '-h', '--help', &pagered { STDOUT.puts helptext }
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cmds.on :sync, &sudod { cave.sync.() }
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cmds.on :search, :show, &sudo_pagered {|*args| cave.this(*args).() }
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cmds.on :resolve, &sudo_pagered {|*args| cave.resumable!.this(*args).() }
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cmds.on 'fix-linkage', &sudo_pagered {|*args|
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cave.resumable!.this *args
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cave.args.push '--', cave.prepare_resume_file
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cave.resumable = false
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cave.()
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}
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cmds.on :remove, &sudo_pagered {|cmd, *args| cave.resumable!.uninstall(*args).()}
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cmds.on :upgrade, &sudo_pagered {|cmd, *args| cave.resumable!.resolve( '-c', :world, *args).() }
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cmds.on :install, &sudod {|cmd, *argv| cave.resumable!.resolve( '-x', *argv).() }
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cmds.on :uninstall, &sudod {|cmd, *argv| cave.resumable!.uninstall( '-x', *argv).() }
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cmds.on :do, :resume, &sudod {|cmd, *args| cave.resumable!.resume( *args).() }
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cmds.on '--list-commands', &pagered { puts cmds.map{|k,v|k} }
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cmds.on '--install-commands', &sudod {
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dir, exe = File.split( argv0)
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cmds.each do |k,v|
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k = k.to_s
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k = File.join dir, "#{cmds.prefix}-#{k}"
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File.symlink exe, k unless File.exist? k
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end
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}
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end
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def setup_params options, argv
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on_off_auto = lambda do
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argv.shift
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case argv[0]
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when 'on', '1', 'true', 't' then true
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when 'off', '0', 'false', 'f' then false
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end
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end
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param = lambda { argv.shift; argv[0] }
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until argv.empty?
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case opt = argv[0]
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when '--list-commands', '--install-commands'
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options[:cmd] = opt
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when '--dummy' then options[:dummy] = true
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when '--resume-file' then options[:resume_file] = param.call
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when '--tag' then options[:tag] = param.call
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when /^\d+$/ then options[:tag] = opt
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when '--pager' then options[:pager] = on_off_auto.call
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when '--color' then options[:color] = on_off_auto.call
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when '--sudo' then options[:sudo] = on_off_auto.call
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else return
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end
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argv.shift
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end
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end
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def setup_env options, argv
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options[:dummy] = true if %w[1 true yes].include?( ENV['DUMMY'].to_s.downcase)
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options[:sudo] = false if %w[1 true yes].include?( ENV['NOSUDO'].to_s.downcase)
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options[:tty] = true if STDOUT.tty?
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end
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def setup_run options, argv
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on_off_auto = lambda {|x| nil == x ? true : x }
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argv.unshift options[:cmd] if options[:cmd]
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@cave.dummy! if options[:dummy]
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@cave.can_be_colored if on_off_auto.( options[:color]) and options[:tty]
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@nopager = true unless on_off_auto.( options[:pager]) or options[:tty]
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@nosudo = true unless on_off_auto.( options[:sudo])
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resumefilesuffix = if options[:resume_file]
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options[:resume_file]
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elsif options[:tag]
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"tag-#{options[:tag]}"
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elsif STDOUT.tty? and STDIN.tty? and STDOUT.stat.rdev == STDIN.stat.rdev
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"dev-#{STDOUT.stat.rdev}"
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else
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"ppd-#{Process.ppid}"
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end
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@cave.resume_file = options[:resume_file] || "/tmp/truckle-resume-#{resumefilesuffix}"
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end
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def setup_recall options, argv
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on_off_auto = lambda {|n,x| case x when true then [n, 'on'] when false then [n, 'off'] end }
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param = lambda {|n,x| n if x }
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@params = [
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param.( '--dummy', options[:dummy]),
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param.( ['--resume-file', options[:resume_file]], options[:resume_file]),
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param.( ['--tag', options[:tag]], options[:tag]),
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on_off_auto.( '--sudo', options[:sudo]),
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on_off_auto.( '--color', options[:color]),
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on_off_auto.( '--pager', options[:pager])
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].flatten.select{|x|x}.map(&:to_s)
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end
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def run *argv
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options = {}
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setup_env options, argv
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setup_params options, argv
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setup_recall options, argv
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setup_run options, argv
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@cmds.run *argv
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end
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def self.run argv0, *argv
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self.new( argv0).run *argv
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end
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end
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cave.dummy! if %w[1 true yes].include?( ENV['DUMMY'].to_s.downcase)
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cave.can_be_colored if STDOUT.tty?
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resumefilesuffix = if /^\d+$/ =~ ARGV[0]
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"tag-#{ARGV.shift}"
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elsif STDOUT.tty? and STDIN.tty? and STDOUT.stat.rdev == STDIN.stat.rdev
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"dev-#{STDOUT.stat.rdev}"
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else
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"ppd-#{Process.ppid}"
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end
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cave.resume_file = "/tmp/truckle-resume-#{resumefilesuffix}"
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cmds.run *ARGV
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class Shortcut
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attr_reader :argv0, :argv
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def initialize argv0, *argv
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@argv0, @argv = argv0, argv
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end
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def exec exe, *args
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exe = File.join File.dirname( @argv0), exe.to_s
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Kernel.exec exe, *args.flatten.select{|x|x}.map(&:to_s)
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end
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def run
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exe = File.basename @argv0
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case exe.to_sym
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when :trdo then exec :truckle, :do, *@argv
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when :tresume then exec :truckle, :resume, *@argv
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end
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end
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alias call run
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def self.run argv0, *argv
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self.new( argv0, *argv).run
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end
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end
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Shortcut.run $0, *ARGV
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Truckle.run $0, *ARGV
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