JSONcJSON

The library provides a JSONC (json with comments) to JSON streamer. It supports multiline comments ( /* Comment */) and one-line comments ( // Comment ). It processes chunks of 512 bytes in place.

For example, it translates JSON with comments:

{
    /*
        JSONcJSON
        =^._.^= ∫
    */
    "Hello": "world" // In-line comments are also supported.
}

to a valid JSON:

{
    "Hello": "world"
}

Installing:

go get github.com/hedhyw/jsoncjson

CLI:

Install the command:

go install github.com/hedhyw/jsoncjson/cmd/jsoncjson@latest

It reads JSONC and writes plain JSON. Without file arguments (or with -) the input is read from stdin, the result goes to stdout:

# From stdin.
echo '{ "Hello": "world" /* Comment. */ }' | jsoncjson

# From a file.
jsoncjson example.jsonc

# To a file.
jsoncjson -o config.json config.jsonc

# Concatenate several inputs.
jsoncjson a.jsonc b.jsonc

# Pipe it further.
jsoncjson config.jsonc | jq .

Flags:

Flag	Description
-o	Output file, - for stdout.
-version	Print the version and exit.
-h	Print the usage and exit.

The command exits with a non-zero status and writes the reason to stderr if the input cannot be read or the output cannot be written.

Library usage example:

More examples.

// Converting jsonc to json and decoding.

const in = `
{
    "Hello": "world"
    /* Perhaps the truth depends on a walk around the lake. */
}
`

// The reader can be anything.
// For example: file, strings.NewReader(), bytes.NewReader(), ...
var r = jsoncjson.NewReader(strings.NewReader(in))

var data map[string]interface{}
_ = json.NewDecoder(r).Decode(&data)

fmt.Printf("%+v\n", data) // map[Hello:world].