Debugging bash scripts.

[Ralf Mardorf]

On Sat, 16 Feb 2019 15:33:43 +0000, Ian Bruntlett wrote:
>I'm looking to have some kind of debugger to debug bash scripts.
>
>bashdb might be suitable but why isn't it in the usual package
>repositories?

[weremouse at moonstudio ~]$ bash -c "help set" | grep '\-n'
set: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
      -n  Read commands but do not execute them.
      -o option-name
          Set the variable corresponding to option-name:
              noexec       same as -n
[weremouse at moonstudio ~]$ man bash | grep debugger
       --debugger
              Arrange for the debugger profile to be executed before
the shell starts.  Turns on extended debugging mode (see the
description of the extdebug option to the shopt  builtin If set,
behavior intended for use by debuggers is enabled:

However, running

bash -n your_script

checks the syntax but can't detect issues regarding some typos.
IOW if you typed to execute "sl" instead of ls" and "ls" shouldn't be
provided by PATH or it should be by
https://packages.ubuntu.com/cosmic/sl, the "-n" option doesn't help.

I can't say anything about the "--debugger" option, actually I neither
use "-n", nor "--debugger" to check my bash scripts.