Re: manipulating .ly with bash - echo drops \

[Jonathan Kulp]

Rob Canning wrote:
> Rob Canning wrote:
> > hello,
> >
> > i have generated a lilypond file and would like to be able to 
> > manipulate the file with bash scripts.
> > first thing i would like to do is insert some additional stuff one 
> > line under the 'version "2.10" line.
> > the script i have is below - the problem is the echo "$line" bit drops 
> > all the \ from  the score.
> > anyone know a way to fix this script so all the \ remain intact?
> > thanks
> > rob
> >
> > # usage: ./insert.sh mainfile insertedfile >outputfile
> > cat "$1" |
> > while read line
> > do
> > echo "$line"
> > if [[ "$line" == 'version "2.10"' ]]
> > then
> > cat "$2"
> > fi
> > done
> this is my dirty solution
>
> # usage: ./insert.sh mainfile insertedfile >outputfile
> sed  's/\\/\\\\/g' "$1"  | while read line
> do
> echo  "$line"
> if [[ "$line" == '\version "2.10"' ]]
> then
> cat "$2"
> fi
> done

Glad you've found a solution already.  This stuff interests me so I 
fiddled around until I got it to do what I thought you were trying to 
do.  Are you trying to append text to the first argument if it's version 
2.10?  If so then here's how I did it, although it can only append at 
the end of the file, it can't stick it somewhere in the middle.

#!/bin/bash

# usage: ./insert.sh mainfile insertedfile outputfile

# read contents of first argument and look for 2.10, then
# check return status

version=$(cat "$1" | grep "2.10" ; echo $?)

# define full text of first arg
text=$(cat "$1")

# define source of text to be inserted
newtext=$(cat "$2")

# if return status is 0, then it found 2.10 in the file
# and will append text from arg 2 and redirect to
# filename given as arg 3

if [ "$version" == "0" ] ; then
    echo "$text" "$newtext" > "$3"
  else
    echo "version is already 2.11"
fi


[END]

Even if this wasn't what you were looking for I had fun doing it :).

Best,

Jon
--
Jonathan Kulp
http://www.jonathankulp.com