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annotate core/src/luan/cmd_line.luan @ 321:7f7708e8fdd4

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remove import statement git-svn-id: https://luan-java.googlecode.com/svn/trunk@322 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 08 Feb 2015 07:26:20 +0000
parents fed1893821bf
children f8ece87df2b1
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rev   line source
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 local Luan = require "luan:Luan"
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2 local ipairs = Luan.ipairs
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3 local load = Luan.load
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4 local load_file = Luan.load_file
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5 require "luan:String" -- for String methods
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6 local Table = require "luan:Table"
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7 local Io = require "luan:Io"
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8 local Debug = require "luan:Debug"
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9
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11 local standalone_usage = [=[
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12 usage: java luan.Luan [options] [script [args]]
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13 Available options are:
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14 -e stat execute string 'stat'
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15 -i enter interactive mode after executing 'script'
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16 -v show version information
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17 -- stop handling options
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18 - stop handling options and execute stdin
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19 ]=]
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21 local function standalone_error(msg)
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22 Io.stderr.write( msg, "\n", standalone_usage )
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23 end
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26 local args = {...}
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27 local interactive = false
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28 local showVersion = false
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29 local i = 1
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30 if #args == 0 then
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31 interactive = true
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32 showVersion = true
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33 else
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34 while i <= #args do
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35 local arg = args[i]
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36 if arg.sub(1,1) ~= "-" or arg == "--" then
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37 break
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38 end
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39 if arg == "-i" then
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40 interactive = true
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41 elseif arg == "-v" then
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42 showVersion = true
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43 elseif arg == "-e" then
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44 i = i + 1
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45 if i > #args then
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46 standalone_error "'-e' needs argument"
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47 return
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48 end
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49 local cmd = args[i]
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50 local stat = load(cmd,"(command line)",{},true)
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51 local result = Table.pack( stat() )
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52 if result.n > 0 then
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53 print( Table.unpack(result,1,result.n) )
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54 end
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55 elseif arg == "-" then
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56 local src = Io.stdin.read_text()
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57 local stdin = load(src,"stdin")
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58 stdin()
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59 return
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60 else
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61 standalone_error( "unrecognized option '"..arg.."'" )
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62 return
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63 end
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64 i = i + 1
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65 end
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66 end
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67 if showVersion then print(_VERSION) end
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68 if i <= #args then
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69 local file = args[i]
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70 local arg = {}
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71 for j,v in ipairs(args) do
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72 arg[j-i] = v
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73 end
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74 try
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75 local main_file = load_file("file:"..file)
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76 main_file( Table.unpack(arg) )
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77 catch e do
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78 Io.print_to(Io.stderr, e )
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79 end
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80 end
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81 if interactive then
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82 Debug.debug("> ")
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83 end