[GRASS-dev] Re: [GRASS GIS] #1164: newlines in sed scripts not portable for wingrass

[GRASS GIS]

#1164: newlines in sed scripts not portable for wingrass
---------------------------+------------------------------------------------
 Reporter:  hamish         |       Owner:  grass-dev@…              
     Type:  defect         |      Status:  new                      
 Priority:  minor          |   Milestone:  6.4.1                    
Component:  Default        |     Version:  svn-develbranch6         
 Keywords:  wingrass, sed  |    Platform:  MSWindows XP             
      Cpu:  x86-64         |  
---------------------------+------------------------------------------------

Comment(by hamish):

 Replying to [comment:1 glynn]:
 > If you want to insert a literal newline, you're supposed to
 > use backslash-newline, i.e.:
 > {{{
 > echo "abc" | sed -e 's|b|\
 > |'
 > }}}

 Only gotcha is that the sed expression needs 'single' quotes not "double"
 ones to get that to work:

 {{{
 $ echo "abc" | sed -e 's|b|\
 |'
 a
 c

 $ echo "abc" | sed -e "s|b|\
 |"
 ac
 }}}

 but with that it's good. thanks.


 committed to 6.5svn r.in.wms with r43549, a couple of left-hand-side s///
 '\n's remain, will wait and see how those behave (since sed is line by
 line I'm kinda surprised those would work at all even when right-hand-side
 replacement was functional.. shrug).

 I guess the right hand side was working before because it was using
 "double" quotes and the shell was doing the newline replacement, not sed.
 Sort of like "echo -e" without asking for it..


 Hamish

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1164#comment:2>
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