Re: Heredoc leading tab/space behaviour

[Chet Ramey]

On 6/24/22 7:53 AM, Ing. Gerold Broser via Bug reports for the GNU Bourne 
Again SHell wrote:

> Bash Version: 4.3
> Patch Level: 48
> Release Status: release

I know you're kind of at the mercy of your distro here, but this is almost
six years old, and three versions out of date. You might consider an
update.


> Description:
>
> The Bash Reference Manual says about Heredoc's redirection operator '<<-':
>
> "If the redirection operator is ‘<<-’, then all leading tab characters are stripped 
> from input lines and the line containing delimiter."
> – https://www.gnu.org/software/bash/manual/bash.html#Here-Documents
>
> This is only half true since apparently also leading spaces are stripped from 
> input lines (while they are not from the delimiter line, and lead to an error 
> there).

They are not, as this example shows:

$ cat x3
cat <<-SCRIPT
 one
  two
   three
    four
        SCRIPT
$ ../bash-4.4-patched/bash ./x3
 one
  two
   three
    four
$ ../bash-4.4-patched/bash --version
GNU bash, version 4.4.23(8)-release (x86_64-apple-darwin15.6.0)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/