addtopath.pro
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; docformat = 'rst'
;
; NAME:
; AddToPath
;
; PURPOSE:
;
; This procedure adds a directory to the beginning of the IDL !PATH
; system variable. If a directory name is not passed in, the current
; IDL working directory is used. The directory must currently exist
; to be added.
;******************************************************************************************;
; ;
; Copyright (c) 2010, by Fanning Software Consulting, Inc. All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
;
;+
; Adds a directory to the beginning of the !PATH system variable.
;
; :Categories:
; Utility
;
; :Params:
; theDirectory: in, optional, type=string
; The name of the directory to add to !PATH. If missing, the current directory.
;
; :Keywords:
; verbose: in, optional, type=boolean
; Set this keyword if you wish to receive confirmation of action.
;
; :Examples:
; For example, to add a "programs" directory to the IDL path::
; AddToPath, '/usr/david/IDL/programs/'
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; :History:
; Written, 20 Sept 2010.
;
; :Copyright:
; Copyright (c) 2010, Fanning Software Consulting, Inc.
;-
PRO ADDTOPATH, theDirectory, VERBOSE=verbose
Compile_Opt idl2
; Error handling.
Catch, theError
IF theError NE 0 THEN BEGIN
void = Error_Message()
RETURN
ENDIF
; Need a directory?
IF N_Elements(theDirectory) EQ 0 THEN CD, Current=theDirectory
; We don't need a final directory marker.
IF StrMid(theDirectory, 0, 1, /REVERSE_OFFSET) EQ Path_Sep() THEN BEGIN
strlength = StrLen(theDirectory)
theDirectory = StrMid(theDirectory, 0, strlength-1)
ENDIF
; Does the directory exist?
IF File_Test(theDirectory, /DIRECTORY) EQ 0 THEN BEGIN
Message, 'The directory (' + theDirectory + ') does not exist. Returning.'
ENDIF
; Need confirmation?
IF Keyword_Set(verbose) THEN BEGIN
Print, 'Prepending the following directory to !PATH: "' + theDirectory + '"'
ENDIF
; Add it to the path.
dirSep = (StrUpCase(!Version.OS_Family) EQ 'WINDOWS') ? ';' : ':'
!PATH = theDirectory + dirSep + !PATH
END