Mailinglist Archive: opensuse-bugs (13385 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=300678#c34


Dr. Werner Fink <werner@xxxxxxxxxx> changed:

           What    |Removed                                         |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                                        |ASSIGNED
      Info Provider|werner@xxxxxxxxxx                               |




--- Comment #34 from Dr. Werner Fink <werner@xxxxxxxxxx>  2007-10-16 08:02:18 
MST ---
There is no way to use ${x//y/z/} in ash therefore I'd like to suggest to
use sed but only once:


  uniquefy_search_path ()
  {
      OIFS="$IFS"
      IFS='
  '
      set -- $(echo ${1+"$@"} | sed -r 's@/*:|([^\\]):@\1\n@g;H;x;s@/\n@\n@')
      IFS="$OIFS"

      _y=""
      for _x ; do
          case ":${_y}:" in
          *:"${_x}":*) continue
          esac
          _y=${_y:+"$_y:"}${_x}
      done
      echo "${_y}"
      unset _y _x
  }

  uniquefy_search_path b:a:c:a
  uniquefy_search_path a:b:a:c
  uniquefy_search_path ' a: b: a:c:a '
  uniquefy_search_path ' a: b: a:\:c:a :\:c'

  uniquefy_search_path /b/:/a/:/c/:/a/
  uniquefy_search_path /a/:/b/:/a/:/c/
  uniquefy_search_path '/ a/:/ b/:/ a/:/c/:/a /'
  uniquefy_search_path '/ a/x/:/ b/x/:/ a/x/:/\:c:/a /x/:/\:c'
  uniquefy_search_path '/ a/x/:/ b/x/:/ a/x/:/\:c/x/:/a /x/:/\:c/x/'
  uniquefy_search_path '/ a/x/:/ b/x/:/ a/x/:/\:/c/x/:/a /x/:/\:/c/x/'

note that the IFS is set this way because the ash also does not know
about $'\n' as ksh or bash do. The method

IFS='
'

only includes the newline, there is no space of tabulator included.


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