About de-duplicating the history and history appending

[Max Blue <Bluemax48@hotmail.com>]

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Hello.

I have been trying to mix the features which allows me to de-duplicate 
and avoid excessive lines in my history, with the 'appendhistory' 
variable, which somehow seems to be incompatible.


I wanted to remove all the duplicated entries after the terminal closed, 
so it would be far easier to search and also to keep at hand the command 
i use the most.

After a lot of help from the people in #zsh , i encountered a way to do 
this, 'externally', with a script.


In my .zshrc i have added a 'trap my_script.sh EXIT' trap, which makes 
the script to be ran after i close the terminal.


The script in question has the following inside:

----

/#!/usr/bin/env bash

#tac ~/.bash_history | awk '!x[$0]++' | tac  > .bash_h && mv .bash_h 
.bash_history /-->//This one saves the last occurence of the repeated 
lines(commented)/

awk '!x[$0]++' ~/.bash_history > .bash_h && mv .bash_h .bash_history / 
-->//this is what i am using at the moment.

----

So, with the default values for /share_history /and /appendhistory, /and 
the following line also inside .zshrc:

/setopt HIST_IGNORE_ALL_DUPS HIST_IGNORE_ALL_DUPS HIST_IGNORE_DUPS 
HIST_SAVE_NO_DUPS HIST_FIND_NO_DUPS/

I have it working.

But an user of the #zsh channel told me that this kind of script would 
break multi-line lines saved in the history, and i also have noticed 
that after running this script, some special characters becomes 'weird' 
into the /.bash_history /viewing. With weird i mean things like /＃º 
/and/＃º /,which fortunately are not present in the terminal history 
(the commands are properly shown in there).

Is there some way to improve this? to make it to not break multi-line 
history entries, to remove the 'weird characters' from the text file and 
also to know if this would break my history in a random moment.


This is my first message in here so i do not know if the order of 
exposing it was the correct.


Bluey

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