magnetar/fe_calckey/frontend/client/vite.json5.ts

// Original: https://github.com/rollup/plugins/tree/8835dd2aed92f408d7dc72d7cc25a9728e16face/packages/json

import JSON5 from "json5";
import { Plugin } from "rollup";
import { createFilter, dataToEsm } from "@rollup/pluginutils";
import { RollupJsonOptions } from "@rollup/plugin-json";

interface Json5SyntaxError extends SyntaxError {
    lineNumber: number;
    columnNumber: number;
}

export default function json5(options: RollupJsonOptions = {}): Plugin {
    const filter = createFilter(options.include, options.exclude);
    const indent = "indent" in options ? options.indent : "\t";

    return {
        name: "json5",

        transform(json, id) {
            if (id.slice(-6) !== ".json5" || !filter(id)) return null;

            try {
                const parsed = JSON5.parse(json);
                return {
                    code: dataToEsm(parsed, {
                        preferConst: options.preferConst,
                        compact: options.compact,
                        namedExports: options.namedExports,
                        indent,
                    }),
                    map: { mappings: "" },
                };
            } catch (err) {
                if (!(err instanceof SyntaxError)) {
                    throw err;
                }
                const message = "Could not parse JSON5 file";
                const { lineNumber, columnNumber } = err as Json5SyntaxError;
                this.warn({
                    message,
                    id,
                    loc: { line: lineNumber, column: columnNumber },
                });
                return null;
            }
        },
    };
}