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Full Discussion: [All variants] Change settings
Top Forums Shell Programming and Scripting [All variants] Change settings Post 302992684 by Chubler_XL on Tuesday 28th of February 2017 02:25:43 PM
Old 02-28-2017
OK sorry for the misunderstanding.

Here is a GNU awk solution:

Code:
gawk -v ADD_DAYS=300 '
/#DATEA/ {
  DT = mktime(gensub(/-/, " ", "g", $2) " 0 0 0")
  DT += 24*60*60*ADD_DAYS
  printf "VALUEA\n%s\n", $2
}
/#VALUE TITLE/ { print gensub(/.*"([^"]+)"/, "\\1","g") }
/#SETTINGSEND/ { print strftime("\nVALUEB\n%Y-%m-%d", DT) }
!/^#/' settings.txt

and here is bash version:

Code:
#!/bin/bash
ADD_DAYS=300
while read line
do
    if [[ "$line" = \#DATEA\ * ]]
    then
       DA=${line#*DATEA }
       DT=$(date -d "$DA + ${ADD_DAYS}days" +%Y-%m-%d)
       printf "VALUEA\n%s\n" "$DA"
    fi
    if [[ "$line" = \#VALUE\ TITLE=* ]]
    then
        line=${line%\"}
        echo "${line#*\"}"
    fi
    [[ "$line" = \#SETTINGSEND* ]] && printf "\nVALUEB\n%s\n" "$DT"
    [[ "$line" = \#* ]] || echo "$line"
done < settings.txt

edit: This bash solution uses a case statement, which I think looks a bit cleaner than the one above:

Code:
#!/bin/bash
ADD_DAYS=300
while read line
do
    case "$line" in
        [#]DATEA\ *)
           DA=${line#*DATEA }
           DT=$(date -d "$DA + ${ADD_DAYS}days" +%Y-%m-%d)
           printf "VALUEA\n%s\n" "$DA" ;;
        [#]VALUE\ TITLE=*)
            line=${line%\"}
            echo "${line#*\"}" ;;
        [#]SETTINGSEND*) printf "\nVALUEB\n%s\n" "$DT" ;;
        [#]*) ;;
        *) echo "$line" ;;
    esac
done < settings.txt

Last edited by Chubler_XL; 02-28-2017 at 03:38 PM..
This User Gave Thanks to Chubler_XL For This Post:
useretail
 

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LEARN ABOUT DEBIAN

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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