json - What's wrong with my sed regex -


i have sed command replace json key-value pairs in format

"xxxxx" : "yyyyy"

or 

"xxxxx" : yyyyy

here sed command,

sed -i  's/\("$\$xxxx\$\$\"\s*:\s*\"\)[^\"]*/\1yyyy/'

now want modify above regex update key-value pairs.

example:

"xxxxx" : "yyyyy"

should updated 

"xxxxx" : "zzzzz"

and

"xxxxx" : yyyyy

should updated 

"xxxxx" : zzzzz

note difference, if value quotes, value should updated quotes , value doesn't have quotes then, should update also

this sed command came with, doesn't work.

sed -i  's/\("$\$"qc.testset.ids"\$\$\"\s*:\s*"*\)[^\"]*/\1123123"*/'

anything missed here? how regex support both format?

use optional capture groups:

$ cat file "xxxxx" : "yyyyy" "xxxxx" : yyyyy "xxxxx" : "yyyyy",   "xxxxx" : yyyyy,  $ sed -r 's/^("xxxxx" : )(")?[^",]*(")?/\1\2zzzzz\3/' file "xxxxx" : "zzzzz" "xxxxx" : zzzzz "xxxxx" : "zzzzz",   "xxxxx" : zzzzz,

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