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Full Discussion: Help building a variable string from a keyword - character replacements!
Top Forums Shell Programming and Scripting Help building a variable string from a keyword - character replacements! Post 303030946 by ghaniba on Tuesday 19th of February 2019 02:36:52 PM
Old 02-19-2019
Help building a variable string from a keyword - character replacements!
Hello scripting geniusii! I come to kneel before the alter of your wisdom!

I am looking to take a keyword and replace characters within that keyword and add them to a string variable. I would like this to only go through however many characters the word has, which may vary in size.

Example word - dominos:
Code:
$ echo "dominos" |  sed 's/./_/1; s/./_/2'
__minos
$ echo "dominos" |  sed 's/./_/1; s/./_/3'
_o_inos
$ echo "dominos" |  sed 's/./_/1; s/./_/4'
_om_nos
$ echo "dominos" |  sed 's/./_/1; s/./_/5'
_omi_os
$ echo "dominos" |  sed 's/./_/1; s/./_/6'
_omin_s
$ echo "dominos" |  sed 's/./_/1; s/./_/7'
_omino_
$ echo "dominos" |  sed 's/./_/2; s/./_/3'
d__inos
$ echo "dominos" |  sed 's/./_/2; s/./_/4'
d_m_nos
$ echo "dominos" |  sed 's/./_/2; s/./_/5'
d_mi_os
$ echo "dominos" |  sed 's/./_/2; s/./_/6'
d_min_s
$ echo "dominos" |  sed 's/./_/2; s/./_/7'
d_mino_
   ...

In the end state, I would like it to look like this:
Code:
KEYWORD="__minos _o_inos _om_nos _omi_os _omin_s _omino_ d__inos d_m_nos d_mi_os d_min_s ... "

I am doing this today manually, creating my "KEYWORD" variable, but I'm trying to tidy this all up and make my script pull the current working directory and use that as the keyword variable base, so that my script can be standardized over several different keywords I'm working with.

Hope this makes some sense, and Thanks so much in advance for your thoughts!

Dave aka Ghan
 

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LEARN ABOUT DEBIAN

shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)
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