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Date: Sat, 07 Nov 2015 08:09:16 -0800
From: Ray Andrews <rayandrews@eastlink.ca>
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Subject: Re: convolutions
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On 11/07/2015 01:32 AM, Bart Schaefer wrote:

> That will fail with "bad substitution" for anything more than a single
> word in the file "junk1".

test2 ()
{
     rm junk2
     cat junk1
     echo "$(eval echo "\${$(cat junk1)}")" >! junk2
     echo
     cat junk2
}

$ . ./test: test2
12345678-10-345678-20-345678-30-345678-40-345678-50-345678-60-345678-70-345678-80-345678-90-345678-100
         let    me    not    to    the marriage${red}of true 
minds${yellow}    admit impediments.${reset}
         Love    is    not    love which    alters${green} when ${reset}

[ in glorious color: ]

10-345678-20-345678-30-345678-40-345678-50-345678-60-345678-70-345678-80-345678-90-345678-100
         let    me    not    to    the marriageof true minds    admit 
impediments.
         Love    is    not    love which    alters when


The file is for a deliberate torture test of color handling and tab 
expansion, so pardon the ugliness, it's the point of it.  But it's 
working here, tho the first part of my 'measuring string' is cut off for 
some reason.  I don't like this, I hate it, it's dangerous. Don't tell 
me it sux, I know it sux.  But I would like some way of performing 
expansions inside a file without any gottchas.  Surely that's simple at 
least to verbalize:

     $ cat in_file | expand_all_parameters > out_file