factored out filter script common code

src/filters/rcldvi

@@ -1,5 +1,5 @@
 #!/bin/sh
-# @(#$Id: rcldvi,v 1.3 2007-01-30 11:36:02 dockes Exp $  (C) 2006 J.F.Dockes
+# @(#$Id: rcldvi,v 1.4 2007-02-06 15:08:22 dockes Exp $  (C) 2006 J.F.Dockes
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -22,20 +22,32 @@
 # or using catdvi. dvitops has given better results during tests, and is
 # chosen first if available, but the dvitops/rclps combination is much
 # slower than catdvi 
+# set variables
+LANG=C ; export LANG
+LC_ALL=C ; export LC_ALL
+progname="rcldvi"
+filetype=dvi
 
 
-# Show help message
-if test $# -ne 1 -o "$1" = "--help" 
-then
-  printf 'Convert a dvi file to unformatted HTML text for recoll indexation.\n'
-  printf 'Usage: %s [infile]\n' "$progname"
-  exit 1
-fi
 
-# Find rclps. Note: this only works because we are always executed with a
-# full path
-infile="$1"
-rclps=`dirname $0`/rclps
+
+#RECFILTCOMMONCODE
+##############################################################################
+# !! Leave the previous line unmodified!! Code imported from the
+# recfiltcommon file
+
+# Utility code common to all shell filters. This could be sourced at run
+# time, but it's slightly more efficient to include the code in the
+# filters at build time (with a sed script).
+
+# Describe error in a way that can be interpreted by our caller
+senderror()
+{
+    echo RECFILTERROR $*
+    # Also alert on stderr just in case
+    echo ":2:$progname::: $*" 1>&2
+    exit 1
+}
 
 iscmd()
 {
@@ -50,24 +62,51 @@ iscmd()
     esac
 }
 
+checkcmds()
+{
+    for cmd in $*;do
+      if iscmd $cmd 
+      then 
+        a=1
+      else 
+        senderror HELPERNOTFOUND $cmd
+      fi
+    done
+}
+
+# show help message
+if test $# -ne 1 -o "$1" = "--help" 
+then
+  echo "Convert a $filetype file to HTML text for Recoll indexing."
+  echo "Usage: $progname [infile]"
+  exit 1
+fi
+
+infile="$1"
+
+# check the input file existence (may be '-' for stdin)
+if test "X$infile" != X- -a ! -f "$infile"
+then
+  senderror INPUTNOSUCHFILE "$infile"
+fi
+
+##############################################################################
+# !! Leave the following line unmodified !
+#ENDRECFILTCOMMONCODE
+
+# Find rclps. Note: this only works because we are always executed with a
+# full path
+rclps=`dirname $0`/rclps
+
 decoder=""
 if iscmd dvips -a iscmd pstotext ; then
   decoder=dvips
-else
+elsif iscmd catdvi
   decoder=catdvi
 fi
 
 if test X$decoder = X ; then
-   echo "$progname: did not find either catdvi or dvips." 1>&2
-   exit 1
-fi
-
-
-# check the input file existence
-if test ! -f "$infile"
-then
-  printf '%s: %s: no such file\n' "$progname" "$infile"
-  exit 1
+   senderror NOTFOUND dvips catdvi
 fi
 
 if test X$decoder = Xdvips ; then