@nomiclabs/buidler/internal/solidity/imports.js

Buidler is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const debug_1 = __importDefault(require("debug"));
const log = debug_1.default("buidler:core:solidity:imports");
function getImports(fileContent) {
    try {
        const parser = require("@solidity-parser/parser");
        const ast = parser.parse(fileContent, { tolerant: true });
        const importedFiles = [];
        parser.visit(ast, {
            ImportDirective: (node) => importedFiles.push(node.path),
        });
        return importedFiles;
    }
    catch (error) {
        log("Failed to parse Solidity file to extract its imports\n", error);
        return findImportsWithRegexps(fileContent);
    }
}
exports.getImports = getImports;
function findImportsWithRegexps(fileContent) {
    const importsRegexp = /import\s+(?:(?:"([^;]*)"|'([^;]*)')(?:;|\s+as\s+[^;]*;)|.+from\s+(?:"(.*)"|'(.*)');)/g;
    let imports = [];
    let result;
    while (true) {
        result = importsRegexp.exec(fileContent);
        if (result === null) {
            return imports;
        }
        imports = [
            ...imports,
            ...result.slice(1).filter((m) => m !== undefined),
        ];
    }
}
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