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Full Discussion: Creating a config file with specified parameters
Top Forums Shell Programming and Scripting Creating a config file with specified parameters Post 303025509 by bakunin on Sunday 4th of November 2018 02:55:10 PM
Old 11-04-2018
Quote:
Originally Posted by multiverse22
I want to create a config file that has parameters that can be specified using - or -- (without an equals sign), as well as the ability to output the file using - or --. Could somebody point me to a generic script to do this?
You might want to investigate getopts to parse the command line, which will do a lot of the "cooking" already (tokenizing by word splitting, for instance). It will, nevertheless, restrict you to a predefined set of options you can pass this way. You can predefine it yourself but then you will have to stick with it (unless you chang the script). So the question is: is that sufficient for your purposes or not?

If it is, you might want to acquaint yourself with getopts first and then ask specific questions if you still need help. If this is not sufficient for your purpose, then i suppose you are on your own and i wouldn't know of any "generic" script you could use. You should perhaps start by deciding what your config files should look like:

- do you want to allow commentaries like this:
Code:
alpha = 1
# this is a line to be ignored
beta = 2

- do you want to allow inline commentaries like this:
Code:
alpha = 1     # this is a comment
beta = 2      # this is another comment

It is easy to dismiss such comments as unnecessary and complicating things but when you have longer complex configs you might want to have some comments explaining inplace why something is what it is and what were your reasons to put it there.

- will you need "chapters" in these config files, like in the Windows init-files-style:
Code:
[part1]
alpha =  1
beta = 2

[part2]
gamma = 3
delta = 4

and perhaps many more questions. You should, before trying to write a script, first define E-X-A-C-T-L-Y how the files you want to produce should look like. Decisions like this will not be easily corrected once you start programming and may well mean that you throw away a script that is already "almost" working and start anew.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

freealut-config

freealut-config(1)					      General Commands Manual						freealut-config(1)

NAME

       freealut-config - script to get information about the installed version of freealut

SYNOPSIS

       freealut-config [ --prefix= DIR] [ --exec-prefix= DIR] [ --version ] [ --libs ] [ --cflags ]

DESCRIPTION

       freealut-config	is  a  tool  that is used to configure and determine the compiler and linker flags that should be used to compile and link
       progams, libraries, and plugins that use freealut.

       The use of freealut-config is deprecated. The more generic tool pkg-config should be used instead.

OPTIONS

       --cflags
	      Print the compiler flags that are necessary to compile a program or library that uses freealut.

       --exec-prefix=DIR
	      If specified, use DIR instead of the installation exec prefix that freealut was  build  with  when  computing  the  output  for  the
	      --cflags and --libs options.  This option must be specified before any of the --cflags and --libs options.

       --libs Print the linker flags that are necessary to link a program or library that uses freealut.

       --prefix=DIR
	      If  specified, use PREFIX instead of the installation prefix that freealut was built with when computing the output for the --cflags
	      and --libs options.  This option is also used for the exec prefix if --exec-prefix was not specified.  This option must be specified
	      before any of the --cflags and --libs options.

       --version
	      Prints the currently installed version of freealut on standard output.

EXAMPLES

       gcc -o main.o $(freealut-config --cflags) -c main.c
	      is how you might use freealut-config to compile a C source file for an executable program.

       gcc -o my_app $(freealut-config --libs) main.o util.o
	      is how you might use freealut-config to link compiled objects into an executable program.

SEE ALSO

       pkg-config(1)

       This manual page was written for sdl-config by Branden Robinson, originally for Progeny Linux Systems, Inc., and the Debian Project. It was
       adapted to freealut by Sam Hocevar.

freealut							    2003-11-22							freealut-config(1)
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