CODEWITHSUNDEEP
shellawksed
systemdebt
systemdebt

Reputation: 4941

replacing values in shell script using sed

My shell script looks like this:

FAILED_REQUEST_DIRECTORY=/bla/bla2 java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1234  -jar /xyz/abc-service-1.0-SNAPSHOT.jar --server.port=1111 --server.address=127.0.0.1 --kafka.bootstrap.servers=10.111.11.11:3197,10.112.12.111:3197,10.123.44.25:3197 --topic.pushcrew.encryptionKey=abc-def-egh --spring.application.name=name-sevice  --fb.verification.token=token --management.trace.include.payload=true --topic.pushcrew.hits=activity-logs --max.block.ms=1000 --pager.duty.api.key=apikey --dsn=dsn

If I have to replace values of keys in the command, for ex: replacing value of key --server.address with the value to shell script through a variable, how would I do it?

I understand it would look like following if I had to replace value for key --server.address:

sed -i "s#--server.address=.* #$SERVER_ADDRESS#g;

But how do I maintain the space that has to be there after the replacement and how do I make sure that part int the key only after =(equals to) and before (space) gets replaced.

Upvotes: 1

Views: 92

Answers (2)

RavinderSingh13
RavinderSingh13

Reputation: 133428

If you are ok with awk, could you please try following.(to save output into Input_file itself append > temp_file && mv temp_file Input_file to following code)

val='10.0.0.1'
awk -v var="$val" '
match($0,/--server\.address=[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/){
  val=substr($0,RSTART,RLENGTH)
  sub(/=.*/,"="var,val)
  print substr($0,1,RSTART-1) val substr($0,RSTART+RLENGTH)
  next
}
1
'   Input_file

Output will be as follows.

FAILED_REQUEST_DIRECTORY=/bla/bla2 java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1234  -jar /xyz/abc-service-1.0-SNAPSHOT.jar --server.port=1111 --server.address=10.0.0.1 --kafka.bootstrap.servers=10.111.11.11:3197,10.112.12.111:3197,10.123.44.25:3197 --topic.pushcrew.encryptionKey=abc-def-egh --spring.application.name=name-sevice  --fb.verification.token=token --management.trace.include.payload=true --topic.pushcrew.hits=activity-logs --max.block.ms=1000 --pager.duty.api.key=apikey --dsn=dsn

Upvotes: 1

anubhava
anubhava

Reputation: 784918

You may use this sed with 2 capturing groups and back-references:

val='10.0.0.1'

sed -E "s/^(.*--server.address=)[^[:blank:]]+(.*)$/\1$val\2/" file.properties

Details:

RegEx:

  • ^(.*--server.address=): Match everything at start till --server.address= substring and capture in group #1
  • [^[:blank:]]*: Match 0 or more non-space characters
  • (.*)$: Match everything till and end and capture in group #2

Replacement:

  • \1: Back-reference to capture group #1
  • $val: Place desired $val in replacement
  • `\2: Back-reference to capture group #2

FAILED_REQUEST_DIRECTORY=/bla/bla2 java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1234 -jar /xyz/abc-service-1.0-SNAPSHOT.jar --server.port=1111 --server.address=10.0.0.1 --kafka.bootstrap.servers=10.111.11.11:3197,10.112.12.111:3197,10.123.44.25:3197 --topic.pushcrew.encryptionKey=abc-def-egh --spring.application.name=name-sevice --fb.verification.token=token --management.trace.include.payload=true --topic.pushcrew.hits=activity-logs --max.block.ms=1000 --pager.duty.api.key=apikey --dsn=dsn

Upvotes: 1

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