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HJSON Config Files

JSON for Humans!

HJSON is the configuration file format used by ENiGMA½ for System Configuration, Menus, etc. HJSON is is JSON for humans!

For those completely unfamiliar, JSON stands for JavaScript Object Notation. But don’t let that scare you! JSON is simply a text file format with a bit of structure ― kind of like a fancier INI file. HJSON on the other hand as mentioned previously, is JSON for humans. That is, it has the following features and more:

  • More resilient to syntax errors such as missing a comma
  • Strings generally do not need to be quoted. Multi-line strings are also supported!
  • Comments are supported (JSON doesn’t allow this!): #, // and /* ... */ style comments are allowed.
  • Keys never need to be quoted
  • …much more! See the official HJSON website.

Terminology

Through the documentation, some terms regarding HJSON and configuration files will be used:

  • config.hjson: Refers to /path/to/enigma-bbs/config/config.hjson. See System Configuration.
  • menu.hjson: Refers to /path/to/enigma-bbs/config/<yourBBSName>-menu.hjson. See Menus.
  • Configuration key: Elements in HJSON are name-value pairs where the name is the key. For example, provided foo: bar, foo is the key.
  • Configuration section or block (also commonly called an “Object” in code): This is referring to a section in a HJSON file that starts with a key. For example:
    someSection: {
      foo: bar
    }
    

    Note that someSection is the configuration section (or block) and foo: bar is within it.

Editing HJSON

HJSON is a text file format, and ENiGMA½ configuration files should always be saved as UTF-8.

It is highly recommended to use a text editor that has HJSON support. A few (but not all!) examples include:

See https://hjson.org/users.html for more more editors & plugins.

Hot-Reload A.K.A. Live Editing

ENiGMA½’s configuration, menu, and theme files can edited while your BBS is running. When a file is saved, it is hot-reloaded into the running system. If users are currently connected and you change a menu for example, the next reload of that menu will show the changes.

:information_source: See also Configuration Files

CaSe SeNsiTiVE

Configuration keys are case sensitive. That means if a configuration key is boardName for example, boardname, or BOARDNAME will not work.

Escaping

Some values need escaped. This is especially important to remember on Windows machines where file paths contain backslashes (\). To specify a path to C:\foo\bar\baz.exe for example, an entry may look like this in your configuration file:

something: {
    path: "C:\\foo\\bar\\baz.exe" // note the extra \'s!
}

Tips & Tricks

JSON Compatibility

Remember that standard JSON is fully compatible with HJSON. If you are more comfortable with JSON (or have an editor that works with JSON that you prefer) simply convert your config file(s) to JSON and use that instead!

HJSON can be converted to JSON with the hjson CLI:

cd /path/to/enigma-bbs
cp ./config/config.hjson ./config/config.hjson.backup
./node_modules/hjson/bin/hjson ./config/config.hjson.backup -j > ./config/config.hjson

You can always convert back to HJSON by omitting -j in the command above.

oputil

You can easily dump out your current configuration in a pretty-printed style using oputil: ./oputil.js config cat