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|
# Hans Hagen / PRAGMA ADE / 2005 / www.pragma-ade.com
#
# Fast Change Dir
#
# This is a kind of variant of the good old ncd
# program. This script uses the same indirect cmd
# trick as Erwin Waterlander's wcd program.
#
# === windows: fcd.cmd ===
#
# @echo off
# ruby -S fcd_start.rb %1 %2 %3 %4 %5 %6 %7 %8 %9
# if exist "%HOME%/fcd_stage.cmd" call %HOME%/fcd_stage.cmd
#
# === linux: fcd (fcd.sh) ===
#
# !/usr/bin/env sh
# ruby -S fcd_start.rb $1 $2 $3 $4 $5 $6 $7 $8 $9
# if test -f "$HOME/fcd_stage.sh" ; then
# . $HOME/fcd_stage.sh ;
# fi;
#
# ===
#
# On linux, one should source the file: ". fcd args" in order
# to make the chdir persistent.
#
# You can create a stub with:
#
# ruby fcd_start.rb --stub --verbose
#
# usage:
#
# fcd --make t:\
# fcd --add f:\project
# fcd [--find] whatever
# fcd [--find] whatever c (c being a list entry)
# fcd [--find] whatever . (last choice with this pattern)
# fcd --list
# todo: HOMEDRIVE\HOMEPATH
require 'rbconfig'
class FastCD
@@rootpath = nil
['HOME','TEMP','TMP','TMPDIR'].each do |key|
if ENV[key] then
if FileTest.directory?(ENV[key]) then
@@rootpath = ENV[key]
break
end
end
end
exit unless @@rootpath
@@mswindows = RbConfig::CONFIG['host_os'] =~ /mswin/
@@maxlength = 26
require 'Win32API' if @@mswindows
if @@mswindows then
@@stubcode = [
'@echo off',
'',
'if not exist "%HOME%" goto temp',
'',
':home',
'',
'ruby -S fcd_start.rb %1 %2 %3 %4 %5 %6 %7 %8 %9',
'',
'if exist "%HOME%\fcd_stage.cmd" call %HOME%\fcd_stage.cmd',
'goto end',
'',
':temp',
'',
'ruby -S fcd_start.rb %1 %2 %3 %4 %5 %6 %7 %8 %9',
'',
'if exist "%TEMP%\fcd_stage.cmd" call %TEMP%\fcd_stage.cmd',
'goto end',
'',
':end'
].join("\n")
else
@@stubcode = [
'#!/usr/bin/env sh',
'',
'ruby -S fcd_start.rb $1 $2 $3 $4 $5 $6 $7 $8 $9',
'',
'if test -f "$HOME/fcd_stage.sh" ; then',
' . $HOME/fcd_stage.sh ;',
'fi;'
].join("\n")
end
@@selfpath = File.dirname($0)
@@datafile = File.join(@@rootpath,'fcd_state.dat')
@@histfile = File.join(@@rootpath,'fcd_state.his')
@@cdirfile = File.join(@@rootpath,if @@mswindows then 'fcd_stage.cmd' else 'fcd_stage.sh' end)
@@stubfile = File.join(@@selfpath,if @@mswindows then 'fcd.cmd' else 'fcd' end)
def initialize(verbose=false)
@list = Array.new
@hist = Hash.new
@result = Array.new
@pattern = ''
@result = ''
@verbose = verbose
if f = File.open(@@cdirfile,'w') then
f << "#{if @@mswindows then 'rem' else '#' end} no dir to change to"
f.close
else
report("unable to create stub #{@@cdirfile}")
end
end
def filename(name)
File.join(@@root,name)
end
def report(str,verbose=@verbose)
puts(">> #{str}") if verbose
end
def flush(str,verbose=@verbose)
print(str) if verbose
end
def clear
if FileTest.file?(@@histfile)
begin
File.delete(@@histfile)
rescue
report("error in deleting history file '#{@histfile}'")
else
report("history file '#{@histfile}' is deleted")
end
else
report("no history file '#{@histfile}'")
end
end
def scan(dir='.')
begin
[dir].flatten.sort.uniq.each do |dir|
begin
Dir.chdir(dir)
report("scanning '#{dir}'")
# flush(">> ")
Dir.glob("**/*").each do |d|
if FileTest.directory?(d) then
@list << File.expand_path(d)
# flush(".")
end
end
# flush("\n")
@list = @list.sort.uniq
report("#{@list.size} entries found")
rescue
report("unknown directory '#{dir}'")
end
end
rescue
report("invalid dir specification ")
end
end
def save
begin
if f = File.open(@@datafile,'w') then
@list.each do |l|
f.puts(l)
end
f.close
report("#{@list.size} status bytes saved in #{@@datafile}")
else
report("unable to save status in #{@@datafile}")
end
rescue
report("error in saving status in #{@@datafile}")
end
end
def remember
if @hist[@pattern] == @result then
# no need to save result
else
begin
if f = File.open(@@histfile,'w') then
@hist[@pattern] = @result
@hist.keys.each do |k|
f.puts("#{k} #{@hist[k]}")
end
f.close
report("#{@hist.size} history entries saved in #{@@histfile}")
else
report("unable to save history in #{@@histfile}")
end
rescue
report("error in saving history in #{@@histfile}")
end
end
end
def load
begin
@list = IO.read(@@datafile).split("\n")
report("#{@list.length} status bytes loaded from #{@@datafile}")
rescue
report("error in loading status from #{@@datafile}")
end
begin
IO.readlines(@@histfile).each do |line|
if line =~ /^(.*?)\s+(.*)$/i then
@hist[$1] = $2
end
end
report("#{@hist.length} history entries loaded from #{@@histfile}")
rescue
report("error in loading history from #{@@histfile}")
end
end
def show
begin
puts("directories:")
puts("\n")
if @list.length > 0 then
@list.each do |l|
puts(l)
end
else
puts("no entries")
end
puts("\n")
puts("history:")
puts("\n")
if @hist.length > 0 then
@hist.keys.sort.each do |h|
puts("#{h} >> #{@hist[h]}")
end
else
puts("no entries")
end
rescue
end
end
def find(pattern=nil)
begin
if pattern = [pattern].flatten.first then
if pattern.length > 0 and @pattern = pattern then
@result = @list.grep(/\/#{@pattern}$/i)
if @result.length == 0 then
@result = @list.grep(/\/#{@pattern}[^\/]*$/i)
end
end
else
puts(Dir.pwd.gsub(/\\/o, '/'))
end
rescue
puts("some error")
end
end
def chdir(dir)
begin
if dir then
if f = File.open(@@cdirfile,'w') then
if @@mswindows then
f.puts("cd /d #{dir.gsub('/','\\')}")
else
f.puts("cd #{dir.gsub("\\",'/')}")
end
f.close
end
@result = dir
report("changing to #{dir}",true)
else
report("not changing dir")
end
rescue
end
end
def choose(args=[])
offset = 97
unless @pattern.empty? then
begin
case @result.size
when 0 then
report("dir '#{@pattern}' not found",true)
when 1 then
chdir(@result[0])
else
list = @result.dup
begin
if answer = args[1] then # assignment & test
if answer == '.' and @hist.key?(@pattern) then
if FileTest.directory?(@hist[@pattern]) then
print("last choice ")
chdir(@hist[@pattern])
return
end
else
index = answer[0] - offset
if dir = list[index] then
chdir(dir)
return
end
end
end
rescue
puts("some error")
end
loop do
print("\n")
list.each_index do |i|
begin
if i < @@maxlength then
# puts("#{(i+?a).chr} #{list[i]}")
puts("#{(i+offset).chr} #{list[i]}")
else
puts("\n there are #{list.length-@@maxlength} entries more")
break
end
rescue
puts("some error")
end
end
print("\n>> ")
if answer = wait then
if answer >= offset and answer <= offset+25 then
index = answer - offset
if dir = list[index] then
print("#{answer.chr} ")
chdir(dir)
elsif @hist.key?(@pattern) and FileTest.directory?(@hist[@pattern]) then
print("last choice ")
chdir(@hist[@pattern])
else
print("quit\n")
end
break
elsif list.length >= @@maxlength then
@@maxlength.times do |i| list.shift end
print("next set")
print("\n")
elsif @hist.key?(@pattern) and FileTest.directory?(@hist[@pattern]) then
print("last choice ")
chdir(@hist[@pattern])
break
else
print("quit\n")
break
end
end
end
end
rescue
report($!)
end
end
end
def wait
begin
$stdout.flush
return getc
rescue
return nil
end
end
def getc
begin
if @@mswindows then
ch = Win32API.new('crtdll','_getch',[],'L').call
else
system('stty raw -echo')
ch = $stdin.getc
system('stty -raw echo')
end
rescue
ch = nil
end
return ch
end
def check
unless FileTest.file?(@@stubfile) then
report("creating stub #{@@stubfile}")
begin
if f = File.open(@@stubfile,'w') then
f.puts(@@stubcode)
f.close
end
rescue
report("unable to create stub #{@@stubfile}")
else
unless @mswindows then
begin
File.chmod(0755,@@stubfile)
rescue
report("unable to change protections on #{@@stubfile}")
end
end
end
else
report("stub #{@@stubfile} already present")
end
end
end
$stdout.sync = true
verbose, action, args = false, :find, Array.new
usage = "fcd [--add|clear|find|list|make|show|stub] [--verbose] [pattern]"
version = "1.0.2"
def quit(message)
puts(message)
exit
end
ARGV.each do |a|
case a
when '-a', '--add' then action = :add
when '-c', '--clear' then action = :clear
when '-f', '--find' then action = :find
when '-l', '--list' then action = :show
when '-m', '--make' then action = :make
when '-s', '--show' then action = :show
when '--stub' then action = :stub
when '-v', '--verbose' then verbose = true
when '--version' then quit("version: #{version}")
when '-h', '--help' then quit("usage: #{usage}")
when /^\-\-.*/ then quit("error: unknown switch #{a}, try --help")
else args << a
end
end
fcd = FastCD.new(verbose)
fcd.report("Fast Change Dir / version #{version}")
case action
when :make then
fcd.clear
fcd.scan(args)
fcd.save
when :clear then
fcd.clear
when :add then
fcd.load
fcd.scan(args)
fcd.save
when :show then
fcd.load
fcd.show
when :find then
fcd.load
fcd.find(args)
fcd.choose(args)
fcd.remember
when :stub
fcd.check
end
|