Replace text and insert more text - bash

Question

I need to replace some text in a file and add couple of lines before the end of file.
I have this:
{
"something": "option1",
"other": [
"value",
]
}
and I need this:
{
"something": "option2",
"other": [
"value",
],
"more": {
"stuff": "yey!"
}
}
I tried this scipt:
stuff=$1
value=",
\"more\": {
\"stuff\": \"$stuff\"
}"
sed -e "s/option1/option2" -e '$ \i$value' \
file1.json > file2.json
but I get:
{
"something": "option2",
"other": [
"value",
]
$value
}
How do I do this properly?

Answer 1

The only right way to manipulate json data is using JSON parsers/processors. Period!
Use jq processor, it'll make your "relationship" with JSON easy and comfortable:
Valid JSON file1.json:
{
"something": "option1",
"other": [
"value"
]
}
stuff="jq got you"
jq --arg stuff "$stuff" '.more = {stuff: $stuff}' file1.json
The output:
{
"something": "option1",
"other": [
"value"
],
"more": {
"stuff": "jq got you"
}
}

Answer 2

It's not the better way, but if you want with sed, you can try
With gnu sed
echo "$value" | sed ':A;/\n.*}/!{N;bA};h;s/.*//;N;$!{s/.*\n//;:B;N;$!{H;s/option1/option2/;s/\n.*//p;g;s/\(.*\)\(\n.*\n[^\n]*\)/\1/;x;s/\(.*\n\)\([^\n]*\)/\2/;bB}};H;g;s/\(.*\n\)\([^\n]*\)\(\n[^\n]*\)/\2/;G;s/\(.*\n\)\([^\n]*\n\)\([^\n]*\)/\1\3/;s/\([^\n]\)\(\n\)\(.*\)/\1\3/' /dev/stdin infile
Or with OpenBSD sed
cat scriptsed
sed ':A;/\n.*}/!{N;bA
}
h;s/.*//;N;$!{s/.*\n//;:B;N;$!{H;s/option1/option2/;s/\n.*//p;g;s/\(.*\)\(\n.*\n[^\n]*\)/\1/;x;s/\(.*\n\)\([^\n]*\)/\2/;bB
}
}
H;g;s/\(.*\n\)\([^\n]*\)\(\n[^\n]*\)/\2/;G;s/\(.*\n\)\([^\n]*\n\)\([^\n]*\)/\1\3/;s/\([^\n]\)\(\n\)\(.*\)/\1\3/'
And call it like that
(echo "$value";cat infile) | ./scriptsed