[SOLVED] sed Pattern to Insert Comma after a character

Issue

Add comma after closing bracket } using bash.

Using

sed 's/variable/&,/g;s/,$//'

adds comma after variable, however,

sed 's/}/&,/g;s/,$//'

doesn't work.

Input:

 variable "policy_name1" {
      description = "abc xyz"
      type        = string
      default = [
        "test1"
        "test2"
      ]
    }
    variable "policy_name2" {
      description = "abc xyz"
      type        = bool
      default     = false
    }

Output:

variable "policy_name1" {
      description = "abc xyz"
      type        = string
      default = [
        "test1"
        "test2"
      ]
    },
    variable "policy_name2" {
      description = "abc xyz"
      type        = bool
      default     = false
    }

Solution

Here is what you can do,

#!/usr/bin/env bash

FILENAME="test.tf"
COUNT=`wc -l $FILENAME | awk '{ print $1 }'`
COUNT=`expr $COUNT - 1`

sed "1,$COUNT s/}/},/" "$FILENAME"

I have provided a bash script so that we can avoid the last line in a right way. This script will append a comma whenever it finds an ending curly bracket ( } ) except for when it is last line.

Answered By - nvt_dc