[magick-users] Automatic conversion Linux shell script -> DOS / Windows batch file

[Wolfgang Hugemann]

To all Windows users over here,

recently, I re-wrote the introduction to using IM under Windows, which 
is now placed at http://www.imagemagick.org/Usage/windows/. I started 
with what Anthony had written.

So far, I covered only batch files, but I am planning to cover the 
Windows Script Host (more precisely its VisualBasic flavour) on one of 
the following weekends.

Anthony suggested that someone should try to write an utility to convert 
IM Linux shell scripts -- i.e. the examples on Anthony's website -- into 
  the equivalent DOS batch files. So I gave it a try with SED. The Unix 
utility SED (Streamline EDitor) is also available for Windows at 
SourceForge, see http://sed.sourceforge.net.

Basically, you only need to place the three files:

sed.exe, libiconv2.dll, libintl3.dll

into a directory which is included in the executable search path, 
possibly the Windows system directory or the IM program directory.

As I am not the world's most skilled SED user, someone should perhaps 
check the script given below.

I was for example unable to place a UNIX in-line comment into a separate 
line BEFORE the line being commented in UNIX, so I placed it behind it. 
I also tried to pack all continuated lines into just one line by the 
script, such that it could be one out of a FOR loop, but my code for this:

# Merge continuated lines
:a
N
s/\\[ ]*\n[ ]*/ /
ta

somehow interfered with the rest of the script, so I dropped the issue.

After testing, we will probably place the script at 
http://www.imagemagick.org/Usage/windows/.

Wolfgang Hugemann

###################################################
# SED command file to convert
# an ImageMagick Linux shell script
# into the equivalent DOS/Windows batch file.
# Get SED at http://sed.sourceforge.net
#
# USAGE: sed -f cim.txt linux.scr > windows.bat
#
#   Input:  linux.scr   = Linus shell script
#   Output: windows.bat = DOS/Windows batch file
#
# Version 0.1 by Wolfgang Hugemann
###################################################

# Replace "convert" -> "IMcomvert"
# The option 'i' means "case Insensitive"
# The option 'g' means "all occurences" (global)
s/convert/IMconvert/ig

# Replace all single quotes (') by double quotes (")
s/'/\"/g

# Double all percent signs
s/%/%%/g

# Un-escape paranthesis '(', ')' and exclamation marks '!'
s/\\\([()!]\)/\1/g

# Escape all shell characters, i.e.  & | < > ^
s/\([&|<>^]\)/^\1/g

# Replace the UNIX comment sign '#' by two double colons '::'
# Insert a line break '\n' to ensure that the comment line
# starts with '::'
s/#/\n::/

# Bracket fully qualified filenames
# i.e. c:\fully qualified\finame.jpg
# by double quotes
s/\(.:.*\.[a-z,A-Z]*\)[ ]/\"\1\" /

# Replace the line continuation character
s/\\[ ]*$/^/