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Re: [zsh] How to mimic errexit within subshell (or function)?

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2012-05-01 21:20:38 +0000, kj:
> 
> 
> The following scheme doesn't work as expected: despite the set -e
> (errexit), the subshell does not exit on error (it just goes on to
> execute the next command):
> 
> #!/usr/bin/zsh
> (
>   set -e
>   cmd0...
>   cmd1...
>   cmd2...
>   ...
>   echo "$0: done" 
> ) || { echo "$0: failed" && exit 1 }
> 
> How can I mimic the behavior of "set -e" within a subshell?  (Or
> within a function, for that matter?)  (I realize that I can always
> append "|| exit 1" to every command, but this is precisely what
> I'd like to avoid.)
[...]

Try 

zsh -ec '
  cmd1
  cmd2...
' || ...

Or:

(
  setopt nodebugbeforecmd
  TRAPDEBUG() { ((!$?)) || exit; }
  cmd1
  cmd2...
) || ...

I personally wouldn't touch "set -e" with a barge pole, and
would use some « || die '...' »

With die() being a function that takes an optional argument to
display on stderr and exits with a non-zero exit status.

-- 
Stephane

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[zsh] How to mimic errexit within subshell (or function)? kj <no.email@please.post> - 2012-05-01 21:20 +0000
  Re: [zsh] How to mimic errexit within subshell (or function)? Stephane Chazelas <stephane.chazelas@gmail.com> - 2012-05-02 07:34 +0100
    Re: [zsh] How to mimic errexit within subshell (or function)? Geoff Clare <geoff@clare.See-My-Signature.invalid> - 2012-05-02 13:51 +0100
      Re: [zsh] How to mimic errexit within subshell (or function)? Stephane Chazelas <stephane.chazelas@gmail.com> - 2012-05-02 14:29 +0100
    Re: [zsh] How to mimic errexit within subshell (or function)? kj <no.email@please.post> - 2012-05-02 19:33 +0000
      Re: [zsh] How to mimic errexit within subshell (or function)? Stephane Chazelas <stephane.chazelas@gmail.com> - 2012-05-02 20:53 +0100
  Re: [zsh] How to mimic errexit within subshell (or function)? Martin Vaeth <vaeth@mathematik.uni-wuerzburg.de> - 2012-05-02 10:30 +0000
    Re: [zsh] How to mimic errexit within subshell (or function)? kj <no.email@please.post> - 2012-05-02 19:09 +0000
      Re: [zsh] How to mimic errexit within subshell (or function)? kj <no.email@please.post> - 2012-05-02 19:12 +0000
      Re: [zsh] How to mimic errexit within subshell (or function)? Stephane Chazelas <stephane.chazelas@gmail.com> - 2012-05-02 20:27 +0100
        Re: [zsh] How to mimic errexit within subshell (or function)? kj <no.email@please.post> - 2012-05-03 18:20 +0000

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