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59 lines
1.1 KiB
JavaScript
59 lines
1.1 KiB
JavaScript
"use strict";
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const code = ( () => {
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let preface = "";
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const MODULE_VARS = {
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"module": true,
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"process": true,
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"code": true,
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"runInContext": true,
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"source": true,
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"preface": true,
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};
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Object.keys( MODULE_VARS ).forEach( name => {
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preface += `var ${ name } = void 0;`;
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} );
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function generate( name ) {
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return `${ ( MODULE_VARS[ name ] ? "" : "var " ) + name } = __context.${ name };`;
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}
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return { generate, preface };
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} )();
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module.exports = {
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// `eval` the given source, using properties found in `context` as top-level
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// variables, while hiding some variables in this module from the source.
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//
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// Based on `vm.runInContext` found in Node.js, this is a cross-env solution.
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runInContext( source, __context ) {
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let preface = code.preface;
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if ( typeof __context === "object" ) {
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Object.keys( __context ).forEach( name => {
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preface += code.generate( name );
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} );
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}
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return eval( preface + source );
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},
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};
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