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Revision 9031

Added by Aaron Marcuse-Kubitza about 11 years ago

lib/sh/util.sh: save_e: renamed to export_e because $e overwrites any previous value in the calling context

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lib/sh/util.sh
45 45 

  		




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#### exceptions


  		




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# usage: cmd || { save_e; ...; rethrow; }


  		




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alias save_e='e=$?'


  		




  
  48
  
    
# usage: cmd || { export_e; ...; rethrow; }


  		




  
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alias export_e='e=$?'


  		




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alias rethrow='return "$e"'


  		




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alias rethrow_subshell='exit "$e"'


  		




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  ......




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function log_e () # usage: log_e cmd... [ || use $e (or $?) ]


  		




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{


  		




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	if "$@"; then :; else # don't use ! because that resets $?


  		




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		save_e


  		




  
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		export_e


  		




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		echo "! $*" >&2


  		




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		echo "! command exited with error $e" >&2


  		




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		rethrow


  		




  ......




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# usage: try cmd...; ignore status; if catch status; then ...; fi; end_try


  		




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function try () { e=0; "$@" || { save_e; true; }; }


  		




  
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function try () { e=0; "$@" || { export_e; true; }; }


  		




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alias try='declare e; try ' # last space alias-expands next word


  		




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catch () { test "$e" -eq "$1"; e=0; }


  		












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