[REBOL] Rebol Windows shell
From: bry::itnisk::com at: 5-Sep-2004 15:22
--
Bryan Rasmussen
I have added slightly to the RESH.R script found here
http://www.rebol.org/cgi-bin/cgiwrap/rebol/ml-display-message.r?m=rmlLXHJ
and done some additions to the registry so as to improve its usage, my rebol
additions are of course pedestrian and boring, here is the version I am using
(I
removed some of the original comments as it made it difficult for me to
follow):
Rebol[]
{LOOK AT SOME EXAMPLES ABOUT THE POWER OF RESH (EXAMPLES MADE UNDER MS WINDOWS
ENVIRONMENT).
Read directory "C:\", find out the dirs, then call MsDOS "DIR" command to show
its contents
>> foreach x read %/c/ [if (last x) = #"/" [resh rejoin ["dir c:\" copy/part x
((length?
x) - 1)] ] ]
Read the directory contained in Rebol variable "a"
>> a: [to-local-file %/c/temp/]
>> dir (/a/)
}
do %user-commands.r
;added by me
messages: "success"
is-script: True
argsstring: ""
argsstring: to-string system/script/args
isfile: True
if error? try [
the-file: read to-file argsstring
isfile: True
the-folder: dirize to-rebol-file first split-path to-file argsstring
][
the-file: "The file could not be read"
the-folder: dirize to-rebol-file argsstring
isfile: False]
if error? try [do to-file argsstring][messages: "cannot DO input"
is-script: False
]
argsstring: to-string argsstring
; end addition
ReSH: func ["This function let you run SYSTEM commands."
command [string!]
/col "Read a output column (from-top from-bottom column-number)"
from-top from-bottom col-num [integer! block!]
/out "Store data in resh-out variable"] [
if error? result:
try [
if error? result: try [ do command 0] [
if error? result:
try [
disarm result
do to-block command
]
[ disarm result
parsed: parse/all command "()"
forall parsed [
if all [(last first parsed) = #"/"
(first first parsed) = #"/" ]
[res: (copy/part next first parsed (length? next first parsed) - 1)
change first parsed (do do load to-block res)
]]
parsed: head parsed
parsed: rejoin parsed
print
^/----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0
if out [
resh-out: make block! 1000
]
; /COL refiniment
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
either col [
reshTemp: make string! 1000
call/output parsed reshTemp
tempParse: parse/all reshTemp "^/"
tempParse: skip tempParse from-top
tempParse: copy/part tempParse ( (length? tempParse) - from-bottom)
foreach x tempParse [
line: parse x none
either (type? col-num) = integer! [
print line/:col-num
] [
if (type? col-num) = block! [
foreach col col-num [
either (type? col) = integer! [
prin rejoin [line/:col tab]
] [
prin rejoin [copy/part skip x (col/1
- 1) col/2 tab]
];either
];foreach
print ""
];if
];either
if out [
append/only resh-out line
]
]
] [
either out [
; /OUT refiniment
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
reshTemp: make string! 1000
call/output parsed reshTemp
tempParse: parse/all reshTemp "^/"
foreach x tempParse [
line: parse x none
append/only resh-out line
print line
];foreach
] [
call/console parsed ; Try to exec as an
external command
]
]
print "/\ /\ /\ /\ /\ /\ /\ /\ /\ /\^/"
0
]
]
]
[
probe disarm result
]
];end of function
;=============================================================================
command: make string! 100
lastPath: what-dir
print messages
forever [
oldCommand: copy command
command: ask rejoin [the-folder " > "]
ReSH command
recycle
];forever
---------------------------------------------------------
As can be seen the only real additions I made was some reading of command line
arguments and some poor message writing on top before the RESH prompt is
displayed. The command line gets passed to RESH when it is opened, and is
controlled by the following registry settings:
[HKEY_CLASSES_ROOT\*\Shell\rebCmd]
@="rebCmd"
[HKEY_CLASSES_ROOT\*\Shell\rebCmd\Command]
@="D:\\programLanguages\\dynamic\\rebol\\view\\rebol.exe
D:\\programLanguages\\dynamic\\rebol\\view\\resh.r %1"
The above keys allows you to right click on a file and open it with RESH via
the
the context menu addition rebCMD
in this case the following will happen:
if you open a script it will be done unless doing so raises errors, for example
if the script has words declared the same as words declared in RESH, and the
value of is-script will be true.
if the script raises errors the messages word will have "cannot DO input"
the value of the-file will be the read in value of the file opened.
the value of isfile will be True
the-folder will hold the path to the folder in which the file was found, you
can
list the contents of this folder using list-dir the-folder
[HKEY_CLASSES_ROOT\Folder\shell\rebCMD\Command]
@="D:\\programLanguages\\dynamic\\rebol\\view\\rebol.exe
D:\\programLanguages\\dynamic\\rebol\\view\\resh.r %1"
the above key allows you to right click on a folder and open RESH
in such a case the value of the-file will be the string "The file could not be
read"
the-folder will be the path to the folder located.
In both cases the path shown at the RESH prompt will be the path of the-folder
as opposed to previously when it showed the folder path where RESH was located.
I have also used this technique to support using various Python interpreters as
shells, but I think that Rebol's large number of built in networking functions
etc. makes it more useful as a shell.
I hope that others find this useful and hopefully will clean up my additions to
the code, as well as perhaps extending the RESH shell as i think it could be
beneficial to spreading Rebol adoption if it became a real top-notch shell
replacement.
