CODEWITHSUNDEEP
bashunixsed
0xsegfault
0xsegfault

Reputation: 3161

Using sed to substitute string in in double quote with a bash variable

I have a yaml file that I am trying to create a number within a loop and replace it with the newly computed variable.

The line i wish to replace looks like this: 

 # genesis_gas_limit:            "16000000" ## Used to set genesis gas limit

I plan on putting this in a loop and thus I would love it if the sed could take a wild card i.e.

 # genesis_gas_limit:            "*" ## Used to set genesis gas limit

I have have tried this 

sed -i 's/ genesis_gas_limit:/c\ genesis_gas_limit: $GASLIMIT' examples/values-local.yaml

but i get the following error:

sed: 1: "examples/values-local.yaml": invalid command code e

I would appreciate any pointers on this

Upvotes: 2

Views: 525

Answers (1)

janos
janos

Reputation: 124804

You could replace genesis_gas_limit: and whatever content follows it, with genesis_gas_limit: and the new value. Using GNU sed:

sed -i "s/ genesis_gas_limit:.*/ genesis_gas_limit: \"$GASLIMIT\"/" examples/values-local.yaml

Using BSD sed (in OSX):

sed -i.bak -e "s/ genesis_gas_limit:.*/ genesis_gas_limit: \"$GASLIMIT\"/" examples/values-local.yaml

Upvotes: 1

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