G'day Alan,

Welcome to the monastery.

The following reproduces my $PS1 (except for the colours): 

ken@ganymede: ~/tmp
$ echo $PS1
\[\033[0;36m\]\u@\h: \w\n\$ \[\033[0m\]
ken@ganymede: ~/tmp
$ perl -Mstrict -Mwarnings -E '
    my %escape = (
        h => do {my $x = `hostname`; chomp $x; $x},
        n => "\n",
        u => $ENV{USER},
        w => $ENV{PWD} =~ s/^$ENV{HOME}/~/r,
    );
    my $string = q{\u@\h: \w\n$ };
    $string =~ s/\\([hnuw])/$escape{$1}/g;
    say $string;
'
ken@ganymede: ~/tmp
$ 
ken@ganymede: ~/tmp
$

[download]

Here I've used four different methods to provide values for the %escape keys and a single regex substitution (s/\\([hnuw])/$escape{$1}/g) to perform all the replacements.

I'll leave you to add colour if you want: Term::ANSIColor may be useful for this.

-- Ken

In reply to Re: replace escape sequences in a string by kcott
in thread replace escape sequences in a string by alanwevans

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