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Full Discussion: Kshrc custom prompt will not work
Top Forums UNIX for Beginners Questions & Answers Kshrc custom prompt will not work Post 303040380 by MadeInGermany on Monday 28th of October 2019 07:52:30 AM
Old 10-28-2019
In ksh93 you can have:
Code:
PS1=$(printf "${GREEN}%s${NORM}@%s:${GREEN}%s${NORM}:$ " '$USER' '$HOSTNAME' '$(_collapsed_pwd)')

The ${USER} ${HOSTNAME} and $(_collapsed_pwd) are in 'ticks' for late evaluation.
Most complicated is the late invocation of the function (I had ran some tests: it only works in ksh93 not ksh88).
BTW there is an echo too many, resulting in double evaluation. Should be
Code:
_collapsed_pwd() {
  pwd | perl -pe '
   BEGIN {
      binmode STDIN,  ":encoding(UTF-8)";
      binmode STDOUT, ":encoding(UTF-8)";
   }; s|^$ENV{HOME}|~|g; s|/([^/.])[^/]*(?=/)|/$1|g; s|/\.([^/])[^/]*(?=/)|/.$1|g
'
}

Last edited by MadeInGermany; 10-28-2019 at 09:30 AM.. Reason: consolidated into one printf command
This User Gave Thanks to MadeInGermany For This Post:
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LEARN ABOUT DEBIAN

perlio::eol

eol(3pm)						User Contributed Perl Documentation						  eol(3pm)

NAME

       PerlIO::eol - PerlIO layer for normalizing line endings

VERSION

       This document describes version 0.14 of PerlIO::eol, released December 18, 2006.

SYNOPSIS

	   binmode STDIN, ":raw:eol(LF)";
	   binmode STDOUT, ":raw:eol(CRLF)";
	   open FH, "+<:raw:eol(LF-Native)", "file";

	   binmode STDOUT, ":raw:eol(CRLF?)"; # warns on mixed newlines
	   binmode STDOUT, ":raw:eol(CRLF!)"; # dies on mixed newlines

	   use PerlIO::eol qw( eol_is_mixed );
	   my $pos = eol_is_mixed( "mixed
string
" );

DESCRIPTION

       This layer normalizes any of "CR", "LF", "CRLF" and "Native" into the designated line ending.  It works for both input and output handles.

       If you specify two different line endings joined by a "-", it will use the first one for reading and the second one for writing.  For
       example, the "LF-CRLF" encoding means that all input should be normalized to "LF", and all output should be normalized to "CRLF".

       By default, data with mixed newlines are normalized silently.  Append a "!"  to the line ending will raise a fatal exception when mixed
       newlines are spotted.  Append a "?" will raise a warning instead.

       It is advised to pop any potential ":crlf" or encoding layers before this layer; this is usually done using a ":raw" prefix.

       This module also optionally exports a "eol_is_mixed" function; it takes a string and returns the position of the first inconsistent line
       ending found in that string, or 0 if the line endings are consistent.

       The "CR", "LF", "CRLF" and "NATIVE" constants are also exported at request.

AUTHORS

       Audrey Tang <autrijus@autrijus.org>.

       Janitorial help by Gaal Yahas <gaal@forum2.org>.

       Inspired by PerlIO::nline by Ben Morrow, <PerlIO-eol@morrow.me.uk>.

COPYRIGHT

       Copyright 2004-2006 by Audrey Tang <audreyt@audreyt.org>.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       See <http://www.perl.com/perl/misc/Artistic.html>

perl v5.14.2							    2006-12-16								  eol(3pm)
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