About

An opinionated ini encoder/decoder with comment-preserving feature.

Originally created due to several issues when using npm/ini and alternatives.

📦 Scoped @xan105 packages are for my own personal use but feel free to use them.

Example

import { parse, stringify } from "@xan105/ini";
import { readFile, writeFile } from "node:fs/promises";

const file = await readFile("path/to/ini", "utf8");
const data = parse(file);
//do something
await writeFile("path/to/ini", data, "utf8");

Install

npm install @xan105/ini

API

⚠️ This module is only available as an ECMAScript module (ESM) starting with version 2.0.0.
Previous version(s) are CommonJS (CJS) with an ESM wrapper.

Named export

parse(string: string, option?: object): object

Decode the ini-style formatted string into an object.

⚙️ Options

• translate:? boolean | object

  Auto string convertion.

  💡 Translate option accepts an object for granular control or a boolean which will force all following options to true/false:

  • bool?: boolean (true)
    String to boolean.

  • number?: boolean (false)
    String to number or bigint.

  • unsafe?: boolean (false)
    Set to true to keep unsafe integer instead of bigint.

  • unquote?: boolean (false)
    Remove leading and trailing quotes (" or ').

• ignoreGlobalSection?: boolean (false)
  Ignore keys without a section aka 'Global' section.

• sectionFilter?: string[]
  List of section name to filter out.

• comment?: boolean (true)
  When set to true comments are stored in the symbol property comment of the returned object otherwise they are ignored.

• removeInline?: boolean (false)
  Remove illegal inline comment. ⚠️ Can have false positive. Use with caution.

📝 Implementation notice

• Sections cannot be nested.
• Comments start with ; or #.
• Inline comments are not allowed !
  • Section: they are ignored.
  • Value: they are considered as part of the value unless you use the removeInline option to strip them.
• Duplicate keys: override first occurrence.
• Case sensitive.
• Key/value delimiter is = and is mandatory.
• Whitespaces around section, key and value are trimmed.
• One key/value per line

⚠️ JSON compatibility

Some integers will be represented as BigInt due to their size if the related translate options are used.
BigInt is not a valid value in the JSON spec.
As such when stringify-ing the returned object to JSON you'll need to handle the JSON stringify replacer function to prevent it to fail.

A common workaround is to represent them as a string:

JSON.stringify(data, function(key, value) {
  if(typeof value === "bigint")
    return value.toString();
  else
    return value;
});

stringify(obj: object, option?: object): string

Encode the object obj into an ini-style formatted string.

⚙️ Options

• whitespace?: boolean (false)
  Whether to put whitespace around the delimiter =.

• blankLine?: boolean (true)
  Add blank lines between sections.

• ignoreGlobalSection?: boolean (false)
  Ignore root properties (not under any namespace if you will).

• quoteString?: boolean (false)
  Quote string values using double quotes ("...").

• comment?: boolean (true)
  Restore comments from the symbol property comment of the given object (if any).

• eol?: string (system's EOL)
  Either "\n" (POSIX) or "\r\n" (Windows).

📝 Implementation notice

• Sections shall not be nested.
• Case sensitive.
• Empty sections are allowed.
• Value can only be a boolean, number, bigint or string.