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Diffstat (limited to 'jni/ruby/lib/shell.rb')
| -rw-r--r-- | jni/ruby/lib/shell.rb | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/jni/ruby/lib/shell.rb b/jni/ruby/lib/shell.rb new file mode 100644 index 0000000..db2d687 --- /dev/null +++ b/jni/ruby/lib/shell.rb @@ -0,0 +1,458 @@ +# +# shell.rb - +# $Release Version: 0.7 $ +# $Revision: 1.9 $ +# by Keiju ISHITSUKA(keiju@ruby-lang.org) +# +# -- +# +# +# + +require "e2mmap" + +require "thread" unless defined?(Mutex) + +require "forwardable" + +require "shell/error" +require "shell/command-processor" +require "shell/process-controller" + +# Shell implements an idiomatic Ruby interface for common UNIX shell commands. +# +# It provides users the ability to execute commands with filters and pipes, +# like +sh+/+csh+ by using native facilities of Ruby. +# +# == Examples +# +# === Temp file creation +# +# In this example we will create three +tmpFile+'s in three different folders +# under the +/tmp+ directory. +# +# sh = Shell.cd("/tmp") # Change to the /tmp directory +# sh.mkdir "shell-test-1" unless sh.exists?("shell-test-1") +# # make the 'shell-test-1' directory if it doesn't already exist +# sh.cd("shell-test-1") # Change to the /tmp/shell-test-1 directory +# for dir in ["dir1", "dir3", "dir5"] +# if !sh.exists?(dir) +# sh.mkdir dir # make dir if it doesn't already exist +# sh.cd(dir) do +# # change to the `dir` directory +# f = sh.open("tmpFile", "w") # open a new file in write mode +# f.print "TEST\n" # write to the file +# f.close # close the file handler +# end +# print sh.pwd # output the process working directory +# end +# end +# +# === Temp file creation with self +# +# This example is identical to the first, except we're using +# CommandProcessor#transact. +# +# CommandProcessor#transact executes the given block against self, in this case +# +sh+; our Shell object. Within the block we can substitute +sh.cd+ to +cd+, +# because the scope within the block uses +sh+ already. +# +# sh = Shell.cd("/tmp") +# sh.transact do +# mkdir "shell-test-1" unless exists?("shell-test-1") +# cd("shell-test-1") +# for dir in ["dir1", "dir3", "dir5"] +# if !exists?(dir) +# mkdir dir +# cd(dir) do +# f = open("tmpFile", "w") +# f.print "TEST\n" +# f.close +# end +# print pwd +# end +# end +# end +# +# === Pipe /etc/printcap into a file +# +# In this example we will read the operating system file +/etc/printcap+, +# generated by +cupsd+, and then output it to a new file relative to the +pwd+ +# of +sh+. +# +# sh = Shell.new +# sh.cat("/etc/printcap") | sh.tee("tee1") > "tee2" +# (sh.cat < "/etc/printcap") | sh.tee("tee11") > "tee12" +# sh.cat("/etc/printcap") | sh.tee("tee1") >> "tee2" +# (sh.cat < "/etc/printcap") | sh.tee("tee11") >> "tee12" +# +class Shell + + include Error + extend Exception2MessageMapper + + # debug: true -> normal debug + # debug: 1 -> eval definition debug + # debug: 2 -> detail inspect debug + @debug = false + @verbose = true + + @debug_display_process_id = false + @debug_display_thread_id = true + @debug_output_mutex = Mutex.new + + class << Shell + extend Forwardable + + attr_accessor :cascade, :debug, :verbose + + alias debug? debug + alias verbose? verbose + @verbose = true + + def debug=(val) + @debug = val + @verbose = val if val + end + + + # call-seq: + # Shell.cd(path) + # + # Creates a new Shell instance with the current working directory + # set to +path+. + def cd(path) + new(path) + end + + # Returns the directories in the current shell's PATH environment variable + # as an array of directory names. This sets the system_path for all + # instances of Shell. + # + # Example: If in your current shell, you did: + # + # $ echo $PATH + # /usr/bin:/bin:/usr/local/bin + # + # Running this method in the above shell would then return: + # + # ["/usr/bin", "/bin", "/usr/local/bin"] + # + def default_system_path + if @default_system_path + @default_system_path + else + ENV["PATH"].split(":") + end + end + + # Sets the system_path that new instances of Shell should have as their + # initial system_path. + # + # +path+ should be an array of directory name strings. + def default_system_path=(path) + @default_system_path = path + end + + def default_record_separator + if @default_record_separator + @default_record_separator + else + $/ + end + end + + def default_record_separator=(rs) + @default_record_separator = rs + end + + # os resource mutex + mutex_methods = ["unlock", "lock", "locked?", "synchronize", "try_lock", "exclusive_unlock"] + for m in mutex_methods + def_delegator("@debug_output_mutex", m, "debug_output_"+m.to_s) + end + + end + + # call-seq: + # Shell.new(pwd, umask) -> obj + # + # Creates a Shell object which current directory is set to the process + # current directory, unless otherwise specified by the +pwd+ argument. + def initialize(pwd = Dir.pwd, umask = nil) + @cwd = File.expand_path(pwd) + @dir_stack = [] + @umask = umask + + @system_path = Shell.default_system_path + @record_separator = Shell.default_record_separator + + @command_processor = CommandProcessor.new(self) + @process_controller = ProcessController.new(self) + + @verbose = Shell.verbose + @debug = Shell.debug + end + + # Returns the command search path in an array + attr_reader :system_path + + # Sets the system path (the Shell instance's PATH environment variable). + # + # +path+ should be an array of directory name strings. + def system_path=(path) + @system_path = path + rehash + end + + + # Returns the umask + attr_accessor :umask + attr_accessor :record_separator + attr_accessor :verbose, :debug + + def debug=(val) + @debug = val + @verbose = val if val + end + + alias verbose? verbose + alias debug? debug + + attr_reader :command_processor + attr_reader :process_controller + + def expand_path(path) + File.expand_path(path, @cwd) + end + + # Most Shell commands are defined via CommandProcessor + + # + # Dir related methods + # + # Shell#cwd/dir/getwd/pwd + # Shell#chdir/cd + # Shell#pushdir/pushd + # Shell#popdir/popd + # Shell#mkdir + # Shell#rmdir + + # Returns the current working directory. + attr_reader :cwd + alias dir cwd + alias getwd cwd + alias pwd cwd + + attr_reader :dir_stack + alias dirs dir_stack + + # call-seq: + # Shell.chdir(path) + # + # Creates a Shell object which current directory is set to +path+. + # + # If a block is given, it restores the current directory when the block ends. + # + # If called as iterator, it restores the current directory when the + # block ends. + def chdir(path = nil, verbose = @verbose) + check_point + + if iterator? + notify("chdir(with block) #{path}") if verbose + cwd_old = @cwd + begin + chdir(path, nil) + yield + ensure + chdir(cwd_old, nil) + end + else + notify("chdir #{path}") if verbose + path = "~" unless path + @cwd = expand_path(path) + notify "current dir: #{@cwd}" + rehash + Void.new(self) + end + end + alias cd chdir + + # call-seq: + # pushdir(path) + # pushdir(path) { &block } + # + # Pushes the current directory to the directory stack, changing the current + # directory to +path+. + # + # If +path+ is omitted, it exchanges its current directory and the top of its + # directory stack. + # + # If a block is given, it restores the current directory when the block ends. + def pushdir(path = nil, verbose = @verbose) + check_point + + if iterator? + notify("pushdir(with block) #{path}") if verbose + pushdir(path, nil) + begin + yield + ensure + popdir + end + elsif path + notify("pushdir #{path}") if verbose + @dir_stack.push @cwd + chdir(path, nil) + notify "dir stack: [#{@dir_stack.join ', '}]" + self + else + notify("pushdir") if verbose + if pop = @dir_stack.pop + @dir_stack.push @cwd + chdir pop + notify "dir stack: [#{@dir_stack.join ', '}]" + self + else + Shell.Fail DirStackEmpty + end + end + Void.new(self) + end + alias pushd pushdir + + # Pops a directory from the directory stack, and sets the current directory + # to it. + def popdir + check_point + + notify("popdir") + if pop = @dir_stack.pop + chdir pop + notify "dir stack: [#{@dir_stack.join ', '}]" + self + else + Shell.Fail DirStackEmpty + end + Void.new(self) + end + alias popd popdir + + # Returns a list of scheduled jobs. + def jobs + @process_controller.jobs + end + + # call-seq: + # kill(signal, job) + # + # Sends the given +signal+ to the given +job+ + def kill(sig, command) + @process_controller.kill_job(sig, command) + end + + # call-seq: + # def_system_command(command, path = command) + # + # Convenience method for Shell::CommandProcessor.def_system_command. + # Defines an instance method which will execute the given shell command. + # If the executable is not in Shell.default_system_path, you must + # supply the path to it. + # + # Shell.def_system_command('hostname') + # Shell.new.hostname # => localhost + # + # # How to use an executable that's not in the default path + # + # Shell.def_system_command('run_my_program', "~/hello") + # Shell.new.run_my_program # prints "Hello from a C program!" + # + def Shell.def_system_command(command, path = command) + CommandProcessor.def_system_command(command, path) + end + + # Convenience method for Shell::CommandProcessor.undef_system_command + def Shell.undef_system_command(command) + CommandProcessor.undef_system_command(command) + end + + # call-seq: + # alias_command(alias, command, *opts, &block) + # + # Convenience method for Shell::CommandProcessor.alias_command. + # Defines an instance method which will execute a command under + # an alternative name. + # + # Shell.def_system_command('date') + # Shell.alias_command('date_in_utc', 'date', '-u') + # Shell.new.date_in_utc # => Sat Jan 25 16:59:57 UTC 2014 + # + def Shell.alias_command(ali, command, *opts, &block) + CommandProcessor.alias_command(ali, command, *opts, &block) + end + + # Convenience method for Shell::CommandProcessor.unalias_command + def Shell.unalias_command(ali) + CommandProcessor.unalias_command(ali) + end + + # call-seq: + # install_system_commands(pre = "sys_") + # + # Convenience method for Shell::CommandProcessor.install_system_commands. + # Defines instance methods representing all the executable files found in + # Shell.default_system_path, with the given prefix prepended to their + # names. + # + # Shell.install_system_commands + # Shell.new.sys_echo("hello") # => hello + # + def Shell.install_system_commands(pre = "sys_") + CommandProcessor.install_system_commands(pre) + end + + # + def inspect + if debug.kind_of?(Integer) && debug > 2 + super + else + to_s + end + end + + def self.notify(*opts) + Shell::debug_output_synchronize do + if opts[-1].kind_of?(String) + yorn = verbose? + else + yorn = opts.pop + end + return unless yorn + + if @debug_display_thread_id + if @debug_display_process_id + prefix = "shell(##{Process.pid}:#{Thread.current.to_s.sub("Thread", "Th")}): " + else + prefix = "shell(#{Thread.current.to_s.sub("Thread", "Th")}): " + end + else + prefix = "shell: " + end + _head = true + STDERR.print opts.collect{|mes| + mes = mes.dup + yield mes if iterator? + if _head + _head = false + prefix + mes + else + " "* prefix.size + mes + end + }.join("\n")+"\n" + end + end + + CommandProcessor.initialize + CommandProcessor.run_config +end |