Bun.build `Unexpected keyword 'export'`

[ElYaiko]

What version of Bun is running?

1.1.7-canary.1+72bc2585e

What platform is your computer?

Linux

What steps can reproduce the bug?

When using bun build, it generates some wrong code like:

export { $minify2 as minify };

This is from the package uglify-js, fullcode:

// ../mail/node_modules/uglify-js/tools/node.js
var require_node = __commonJS((exports) => {
  var to_comment = function(value) {
    if (typeof value != "string")
      value = JSON.stringify(value, function(key, value2) {
        return typeof value2 == "function" ? "<[ " + value2 + " ]>" : value2;
      }, 2);
    return "// " + value.replace(/\n/g, "\n// ");
  };
  var describe_ast = function() {
    var out = OutputStream({ beautify: true });
    doitem(AST_Node);
    return out.get() + "\n";
    function doitem(ctor) {
      out.print("AST_" + ctor.TYPE);
      var props = ctor.SELF_PROPS.filter(function(prop) {
        return !/^\$/.test(prop);
      });
      if (props.length > 0) {
        out.space();
        out.with_parens(function() {
          props.forEach(function(prop, i) {
            if (i)
              out.space();
            out.print(prop);
          });
        });
      }
      if (ctor.documentation) {
        out.space();
        out.print_string(ctor.documentation);
      }
      if (ctor.SUBCLASSES.length > 0) {
        out.space();
        out.with_block(function() {
          ctor.SUBCLASSES.sort(function(a, b) {
            return a.TYPE < b.TYPE ? -1 : 1;
          }).forEach(function(ctor2, i) {
            out.indent();
            doitem(ctor2);
            out.newline();
          });
        });
      }
    }
  };
  var infer_options = function(options) {
    var result = exports.minify("", options);
    return result.error && result.error.defs;
  };
  var fs3 = import.meta.require("fs");
  exports.FILES = [
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/utils.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/ast.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/transform.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/parse.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/scope.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/compress.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/output.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/sourcemap.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/mozilla-ast.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/propmangle.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/lib/minify.js"),
    import.meta.require.resolve("/home/yaiko/Sites/project/packages/mail/node_modules/uglify-js/tools/exports.js")
  ];
  new Function("domprops", "exports", function() {
    var code = exports.FILES.map(function(file) {
      return fs3.readFileSync(file, "utf8");
    });
    code.push("exports.describe_ast = " + describe_ast.toString());
    return code.join("\n\n");
  }())(require_domprops(), exports);
  if (+process.env["UGLIFY_BUG_REPORT"]) {
    var $minify2 = function(files, options) {
      if (typeof options == "undefined")
        options = "<<undefined>>";
      var code = [
        "// UGLIFY_BUG_REPORT",
        to_comment(options)
      ];
      if (typeof files == "string") {
        code.push("");
        code.push("//-------------------------------------------------------------");
        code.push("// INPUT CODE", files);
      } else
        for (var name in files) {
          code.push("");
          code.push("//-------------------------------------------------------------");
          code.push(to_comment(name), files[name]);
        }
      if (options.sourceMap && options.sourceMap.url) {
        code.push("");
        code.push("//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9");
      }
      var result = { code: code.join("\n") };
      if (options.sourceMap)
        result.map = '{"version":3,"sources":[],"names":[],"mappings":""}';
      return result;
    };

    export { $minify2 as minify };
  }
  exports.default_options = function() {
    var defs = infer_options({ 0: 0 });
    Object.keys(defs).forEach(function(component) {
      var options = {};
      options[component] = { 0: 0 };
      if (options = infer_options(options)) {
        defs[component] = options;
      }
    });
    return defs;
  };
});

The other issue is that it is attaching real paths, so it may not work well on a server. (Variable exports.FILES)

What is the expected behavior?

No response

What do you see instead?

No response

Additional information

No response

[lukeliasi]

A workaround is to add --external=uglify-js to your build command, e.g: bun build index.ts --outfile=index.js --external=uglify-js