rollup-plugin-insert/lib/index.js

string mutation plugin for Rollup

import { createFilter } from 'rollup-pluginutils';
import MagicString from 'magic-string';
export var transform = function (insert, options) {
    if (options === void 0) { options = {}; }
    var filter = createFilter(options.include, options.exclude);
    var sourceMap = options.sourceMap !== false;
    return {
        name: 'insert',
        transform: function (code, id) {
            if (!filter(id))
                return;
            var magicString = new MagicString(code);
            var output = insert(magicString, code, id);
            if (typeof output === 'string') {
                magicString.overwrite(0, code.length, output);
            }
            else if (output instanceof MagicString) {
                magicString = output;
                // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
            }
            else if (output != null) {
                var received = void 0;
                try {
                    received = JSON.stringify(output);
                }
                catch (_a) {
                    /* istanbul ignore next */
                    received = String(output);
                }
                throw new TypeError("The output content should be an instance of string or MagicString, but received: " + received);
            }
            return {
                code: magicString.toString(),
                map: sourceMap ? magicString.generateMap() : undefined,
            };
        },
    };
};
export var append = function (append, options) {
    return transform(function (magicString) { return magicString.append(append); }, options);
};
export var prepend = function (prepend, options) {
    return transform(function (magicString) { return magicString.prepend(prepend); }, options);
};
export var wrap = function (begin, end, options) {
    return transform(function (magicString) { return magicString.prepend(begin).append(end); }, options);
};
export default {
    transform: transform,
    append: append,
    prepend: prepend,
    wrap: wrap,
};
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