linux shell script sed css structure

Question

how do I write the following sed command so that I can use the line breaks and code structure when I write the sed command as well as output the same code structure? As you can see I'm trying to modify CSS without making it one line.

sed -i 's/#para3{ 
font-size:21pt;    
position:absolute; 
width:500px; 
left:15px;
top:445px; 
text-align:left;
  }/#para3{ 
font-size:testpt;    
position:absolute; 
width:500px; 
left:15px;
top:445px; 
text-align:left;
  }/g' $file0

Tomas F · Accepted Answer · 2018-11-04 07:32:09Z

2

If you just want to replace font-size value between #para3 { and next }:

sed '/#para3 *{/,/}/{s/\(font-size: *\)21pt;/\1testpt;/}' file

To replace all block, you can try the c(change) command:

sed '/#para3 *{/,/}/c \
#para3 { \
  font-size: 3em; \
  width: 100%; \
}' file

NB: after the c command, all lines except last one must ends with a newline character (\)

edited Nov 4, 2018 at 7:32

Tomas F

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answered Nov 13, 2017 at 6:36

SLePort

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2 Comments

calmchess Over a year ago

This is a great answer and I'll definitely use it but I want to replace everything between #para3{ and next }

calmchess Over a year ago

why does the 1 get replaced ?1testpt; is replaced with testpt;

Allan · Accepted Answer · 2017-11-13 03:01:45Z

0

Why don't you proceed in the following way:

Store the content of your css replacement patterns in 2 files (the part to be replaced and the part that will be used for the replacement operation)
Use the cat command to get the files content and store it in 2 variables var1="$(cat toReplace.css)"; var2="$(cat replacement.css)"
Use the 2 variables when calling the sed command: sed -i.bak "s/$var1/$var2/g" $file0
Since you are using the in-place replacement it might be better to take a backup of your file!
Last but not least, you will have to escape all the characters that might be interpreted as special character in your regex as {} you just have to add a backslash before them.

edited Nov 13, 2017 at 3:01

answered Nov 13, 2017 at 2:55

Allan

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1 Comment

calmchess Over a year ago

I still get the following error sed: -e expression #1, char 11: unterminated `s' command

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