source: trunk/SRC/Utilities/find.pro @ 231

;+
; @file_comments
; based on file_search, but it is possible to specify
; a set of possibles names and a different set of
; possibles directories names.
; By default look for files included in !path
;
; all file_search keywords can be used.
;
; @categories 
; find a file
;
; @param FILEIN {in}{required} 
; A scalar or array variable of string type, containing
; file names to match. Input names specifications may contain
; wildcard characters, enabling them to match multiple files
; (see file_search for more informations). By default and if
; necessary, find is looking for filename and also for filename
; completed with '.pro'
;
; @keyword FIRSTFOUND 
; activate this keyword to stop looking for the file as soon as we found one.
;
; @keyword IODIRECTORY {default=['.',!path]} 
; A scalar or array variable of string type, containing
; directories names where we are looking for the file.
; Different directories can be separated by
; path_sep(/search_path) (':' on unix type machine) as it is done
; to define !path.
; Note that if filename's dirname is different from '.', this
; keyword is not taken into account.
;
; @keyword LOOKALLDIR 
; activate to look for the file (with a recursive search if needed)
; in . iodir, homedir, !path + the DATA:TestsData directory if it exists.
;
; @keyword NOPRO 
; activate to avoid the automatic search of filename completed with '.pro'
;
; @keyword ONLYPRO 
; force to look only at file ending with .pro
;
; @keyword ONLYNC 
; force to look only at file ending with .nc
;
; @keyword RECURSIVE 
; performs recursive searching of directory hierarchies.
; In a recursive search, find looks recursively for any and all
; subdirectories in the file hierarchy rooted at the IODIRECTORY argument.
;
; @keyword REPERTOIRE 
; obsolete. keep for compatibility, use directory keyword
;
; @keyword UNIQUE 
; activate to make sure that each element of the output vector is unique.
;
; @keyword TRYFIND 
; if the file was not found and this keyword is activated, find will call
; itself with the keywords /LOOKALLDIR and /FIRSTFOUND to try to find
; the file we are looking for. Note that if the file was found at the
; first try this keyword as no effect (which is not the case with LOOKALLDIR) 
;
; @keyword _EXTRA 
; Used to pass keywords
;
; @returns 
; A scalar or array variable of string type, containing the
; name (with the full path of the matching files. If no files
; exist with names matching the input arguments, find returns
; the scalar string : 'NOT FOUND'
;
; @examples
;
; IDL> print, find('*loadct')
;   /usr/local/rsi/idl_6.0/lib/utilities/xloadct.pro
;   /usr/local/rsi/idl_6.0/lib/loadct.pro
; IDL> print, find('*loadct', iodir=!dir,/recursive)
;   /usr/local/rsi/idl_6.0/lib/loadct.pro
;   /usr/local/rsi/idl_6.0/lib/utilities/xloadct.pro
; IDL> print, find('*loadct.pro')
;   /usr/local/rsi/idl_6.0/lib/utilities/xloadct.pro
;   /usr/local/rsi/idl_6.0/lib/loadct.pro
; IDL> print, find('*loadct',/nopro)
;   NOT FOUND
; IDL> print, find('*loadct', iodir = '/usr/local/rsi/idl_6.0/lib')
;   /usr/local/rsi/idl_6.0/lib/loadct.pro
; IDL> print, find('*loadct', iodir = '/usr/local/rsi/idl_6.0/lib', /test_write)
;   NOT FOUND
; IDL> print, find('*loadct', iodir = '/usr/local/rsi/idl_6.0/lib', /recursive)
;   /usr/local/rsi/idl_6.0/lib/loadct.pro
;   /usr/local/rsi/idl_6.0/lib/utilities/xloadct.pro
; IDL> print, find('mesh*', iodirectory = [iodir, !path])
;   /Users/sebastie/DATA/ORCA2/meshmaskORCA2closea.nc
;   /Users/sebastie/IDL/meshmaskclosesea.pro
;   /Users/sebastie/IDL/meshmaskclosesea.pro~
;   /Users/sebastie/SAXO_RD/Obsolete/meshlec.pro
;   /usr/local/rsi/idl_6.0/lib/mesh_obj.pro
;
; @history
; Sebastien Masson (smasson\@lodyc.jussieu.fr)
;                       28/4/1999
;                       6/7/1999: compatibility mac and windows
; June 2005: Sebastien Masson: cleaning, use for file_* functions
;
; @version
; $Id$
;-
;
FUNCTION find, filein, IODIRECTORY = iodirectory, RECURSIVE = recursive $
               , REPERTOIRE = repertoire, NOPRO = nopro, ONLYPRO = onlypro $
               , ONLYNC = onlync, UNIQUE = unique, FIRSTFOUND = firstfound $
               , LOOKALLDIR = LOOKALLDIR, TRYFIND = tryfind, _extra = ex
; define where we look for the file
;
  compile_opt idl2, strictarrsubs
;
  CASE 1 OF
    keyword_set(lookalldir):BEGIN
@cm_general
      dirnames = ['./', iodir, homedir, !path]
      tstdtadir= file_dirname(find('find', /onlypro), /mark_directory)
      tstdtadir = (file_search(tstdtadir+'../../DATA/TestsData'))[0]
      IF tstdtadir NE '' THEN dirnames = [tstdtadir, dirnames]
    END
    keyword_set(iodirectory): dirnames = iodirectory
    keyword_set(repertoire): dirnames = repertoire
    ELSE: dirnames = ['./', !path]
  ENDCASE
  tmp = dirnames
  dirnames = 'dummy'
  FOR i = 0, n_elements(tmp)-1 DO $
    dirnames = [dirnames, strsplit(tmp[i], path_sep(/search_path), /extract)]
  dirnames = dirnames[1:*]
;
  fileout = 'dummy'
  FOR i = 0, n_elements(filein)-1 DO BEGIN
    dir = file_dirname(filein[i])
    base = file_basename(filein[i])
; try to complete the file name with .pro or .nc if needed...
    CASE 1 OF
      keyword_set(onlypro):BEGIN
        promiss = strpos(base, '.pro', /reverse_search)
        promiss = promiss - (strlen(base) - 4)
        bad = where(promiss NE 0 OR strlen(base) LE 4, cnt)
        IF cnt NE 0 THEN base[bad] = base[bad] + '.pro'
      end
      keyword_set(onlync):BEGIN
        ncmiss = strpos(base, '.nc', /reverse_search)
        ncmiss = ncmiss - (strlen(base) - 3)
        bad = where(ncmiss NE 0 OR strlen(base) LE 3, cnt)
        IF cnt NE 0 THEN base[bad] = base[bad] + '.nc'
      END
      ELSE:if strmid(base, 0, 1, /reverse_offset) NE '*' $
        AND NOT keyword_set(nopro) THEN base = base + '{.pro,}'
    ENDCASE
; use dirnames only if dir eq '.'
    IF dir EQ  '.' THEN BEGIN
      if keyword_set(recursive) THEN $
        found = file_search(dirnames, base, _extra = ex) $
        ELSE found = file_search(dirnames + '/' + base, _extra = ex)
    ENDIF ELSE found = file_search(dir + '/' + base, _extra = ex)
    IF found[0] NE '' THEN BEGIN
      IF keyword_set(firstfound) THEN BEGIN
        IF keyword_set(unique) THEN return, found[uniq(found, sort(found))] $
        ELSE return, found
      ENDIF
      fileout = [fileout, found]
    ENDIF
  ENDFOR

  IF n_elements(fileout) EQ 1 THEN fileout = 'NOT FOUND' $
  ELSE fileout = fileout[1:*]
;
  IF n_elements(fileout) GT 1 THEN BEGIN
    IF keyword_set(unique) THEN fileout = fileout[uniq(fileout, sort(fileout))]
  ENDIF ELSE fileout = fileout[0]
;
  IF keyword_set(lookalldir) AND fileout[0] EQ 'NOT FOUND' $
     AND NOT keyword_set(recursive) THEN $
        filout = find(file_basename(filein[0]), /lookalldir $
                      , /recursive, _extra = ex)
;
  IF keyword_set(tryfind) AND fileout[0] EQ 'NOT FOUND' THEN BEGIN
    fileout = find(file_basename(filein[0]), /lookalldir, /firstfound, _extra = ex)
    fileout = fileout[0]
  ENDIF
;
  RETURN, fileout
END