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'use strict';
exports.__esModule = true;
/**
* Returns an object of node visitors that will call
* 'visitor' with every discovered module path.
*
* todo: correct function prototype for visitor
* @param {Function(String)} visitor [description]
* @param {[type]} options [description]
* @return {object}
*/
exports.default = function visitModules(visitor, options) {
// if esmodule is not explicitly disabled, it is assumed to be enabled
options = Object.assign({ esmodule: true }, options);
let ignoreRegExps = [];
if (options.ignore != null) {
ignoreRegExps = options.ignore.map(p => new RegExp(p));
}
function checkSourceValue(source, importer) {
if (source == null) return; //?
// handle ignore
if (ignoreRegExps.some(re => re.test(source.value))) return;
// fire visitor
visitor(source, importer);
}
// for import-y declarations
function checkSource(node) {
checkSourceValue(node.source, node);
}
// for esmodule dynamic `import()` calls
function checkImportCall(node) {
let modulePath;
// refs https://github.com/estree/estree/blob/HEAD/es2020.md#importexpression
if (node.type === 'ImportExpression') {
modulePath = node.source;
} else if (node.type === 'CallExpression') {
if (node.callee.type !== 'Import') return;
if (node.arguments.length !== 1) return;
modulePath = node.arguments[0];
}
if (modulePath.type !== 'Literal') return;
if (typeof modulePath.value !== 'string') return;
checkSourceValue(modulePath, node);
}
// for CommonJS `require` calls
// adapted from @mctep: https://git.io/v4rAu
function checkCommon(call) {
if (call.callee.type !== 'Identifier') return;
if (call.callee.name !== 'require') return;
if (call.arguments.length !== 1) return;
const modulePath = call.arguments[0];
if (modulePath.type !== 'Literal') return;
if (typeof modulePath.value !== 'string') return;
checkSourceValue(modulePath, call);
}
function checkAMD(call) {
if (call.callee.type !== 'Identifier') return;
if (call.callee.name !== 'require' &&
call.callee.name !== 'define') return;
if (call.arguments.length !== 2) return;
const modules = call.arguments[0];
if (modules.type !== 'ArrayExpression') return;
for (const element of modules.elements) {
if (element.type !== 'Literal') continue;
if (typeof element.value !== 'string') continue;
if (element.value === 'require' ||
element.value === 'exports') continue; // magic modules: https://git.io/vByan
checkSourceValue(element, element);
}
}
const visitors = {};
if (options.esmodule) {
Object.assign(visitors, {
'ImportDeclaration': checkSource,
'ExportNamedDeclaration': checkSource,
'ExportAllDeclaration': checkSource,
'CallExpression': checkImportCall,
'ImportExpression': checkImportCall,
});
}
if (options.commonjs || options.amd) {
const currentCallExpression = visitors['CallExpression'];
visitors['CallExpression'] = function (call) {
if (currentCallExpression) currentCallExpression(call);
if (options.commonjs) checkCommon(call);
if (options.amd) checkAMD(call);
};
}
return visitors;
};
/**
* make an options schema for the module visitor, optionally
* adding extra fields.
*/
function makeOptionsSchema(additionalProperties) {
const base = {
'type': 'object',
'properties': {
'commonjs': { 'type': 'boolean' },
'amd': { 'type': 'boolean' },
'esmodule': { 'type': 'boolean' },
'ignore': {
'type': 'array',
'minItems': 1,
'items': { 'type': 'string' },
'uniqueItems': true,
},
},
'additionalProperties': false,
};
if (additionalProperties) {
for (const key in additionalProperties) {
base.properties[key] = additionalProperties[key];
}
}
return base;
}
exports.makeOptionsSchema = makeOptionsSchema;
/**
* json schema object for options parameter. can be used to build
* rule options schema object.
* @type {Object}
*/
exports.optionsSchema = makeOptionsSchema();