Re: [PATCHv2] am: fix patch format detection for Thunderbird "Save As" emails

[Eric Blake <ebb9@byu.net>]

According to Stephen Boyd on 12/18/2009 7:24 PM:
>> Nope.  You need either "\\015\\n" or '\015\n', since "\015" and "\n"
>> are both
>> undefined in portable shell.
> 
> So, how about this?
> 
>         {
>                 echo "X-Fake-Field: Line One"&&
>                 echo "X-Fake-Field: Line Two"&&
>                 echo "X-Fake-Field: Line Three"&&
>                 git format-patch --stdout first | sed -e "1d"
>         } | sed -e "s/$/;/" | tr "'";"'" "'"\015"'">  patch1-crlf.eml

Syntax error.  "$/" is not defined, so the argument to sed is not
portable.  Then, following the tr, you have an unquoted ;, meaning you
invoked 'tr "'"', followed by invoking the (non-existent) command '.

> 
> Or maybe this?
> 
>         {
>                 echo "X-Fake-Field: Line One"&&
>                 echo "X-Fake-Field: Line Two"&&
>                 echo "X-Fake-Field: Line Three"&&
>                 git format-patch --stdout first | sed -e "1d"
>         } | sed -e "s/$/;/" | tr ";" "\\015">  patch1-crlf.eml

Closer, but not there yet.  "$/" is still not defined.  Then, as a matter
of style, '\' is more readable than "\\" for representing a backslash.  So
as long as we are shifting to '', we might as well do it everywhere in
that line - write it like this:

} | sed -e 's/$/;/' | tr ';' '\015' > patch1-crlf.eml

and you should be set.

-- 
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net