105 lines
15 KiB
JavaScript
105 lines
15 KiB
JavaScript
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'use strict';var _slicedToArray = function () {function sliceIterator(arr, i) {var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i["return"]) _i["return"]();} finally {if (_d) throw _e;}}return _arr;}return function (arr, i) {if (Array.isArray(arr)) {return arr;} else if (Symbol.iterator in Object(arr)) {return sliceIterator(arr, i);} else {throw new TypeError("Invalid attempt to destructure non-iterable instance");}};}();var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { 'default': obj };}
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function getEmptyBlockRange(tokens, index) {
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var token = tokens[index];
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var nextToken = tokens[index + 1];
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var prevToken = tokens[index - 1];
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var start = token.range[0];
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var end = nextToken.range[1];
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// Remove block tokens and the previous comma
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if (prevToken.value === ',' || prevToken.value === 'type' || prevToken.value === 'typeof') {
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start = prevToken.range[0];
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}
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return [start, end];
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}
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module.exports = {
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meta: {
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type: 'suggestion',
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docs: {
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category: 'Helpful warnings',
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description: 'Forbid empty named import blocks.',
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url: (0, _docsUrl2['default'])('no-empty-named-blocks') },
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fixable: 'code',
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schema: [],
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hasSuggestions: true },
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create: function () {function create(context) {
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var importsWithoutNameds = [];
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return {
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ImportDeclaration: function () {function ImportDeclaration(node) {
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if (!node.specifiers.some(function (x) {return x.type === 'ImportSpecifier';})) {
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importsWithoutNameds.push(node);
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}
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}return ImportDeclaration;}(),
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'Program:exit': function () {function ProgramExit(program) {
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var importsTokens = importsWithoutNameds.map(function (node) {return [node, program.tokens.filter(function (x) {return x.range[0] >= node.range[0] && x.range[1] <= node.range[1];})];});
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importsTokens.forEach(function (_ref) {var _ref2 = _slicedToArray(_ref, 2),node = _ref2[0],tokens = _ref2[1];
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tokens.forEach(function (token) {
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var idx = program.tokens.indexOf(token);
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var nextToken = program.tokens[idx + 1];
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if (nextToken && token.value === '{' && nextToken.value === '}') {
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var hasOtherIdentifiers = tokens.some(function (token) {return token.type === 'Identifier' &&
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token.value !== 'from' &&
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token.value !== 'type' &&
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token.value !== 'typeof';});
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// If it has no other identifiers it's the only thing in the import, so we can either remove the import
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// completely or transform it in a side-effects only import
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if (!hasOtherIdentifiers) {
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context.report({
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node: node,
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message: 'Unexpected empty named import block',
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suggest: [
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{
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desc: 'Remove unused import',
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fix: function () {function fix(fixer) {
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// Remove the whole import
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return fixer.remove(node);
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}return fix;}() },
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{
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desc: 'Remove empty import block',
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fix: function () {function fix(fixer) {
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// Remove the empty block and the 'from' token, leaving the import only for its side
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// effects, e.g. `import 'mod'`
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var sourceCode = context.getSourceCode();
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var fromToken = program.tokens.find(function (t) {return t.value === 'from';});
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var importToken = program.tokens.find(function (t) {return t.value === 'import';});
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var hasSpaceAfterFrom = sourceCode.isSpaceBetween(fromToken, sourceCode.getTokenAfter(fromToken));
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var hasSpaceAfterImport = sourceCode.isSpaceBetween(importToken, sourceCode.getTokenAfter(fromToken));var _getEmptyBlockRange =
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getEmptyBlockRange(program.tokens, idx),_getEmptyBlockRange2 = _slicedToArray(_getEmptyBlockRange, 1),start = _getEmptyBlockRange2[0];var _fromToken$range = _slicedToArray(
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fromToken.range, 2),end = _fromToken$range[1];
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var range = [start, hasSpaceAfterFrom ? end + 1 : end];
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return fixer.replaceTextRange(range, hasSpaceAfterImport ? '' : ' ');
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}return fix;}() }] });
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} else {
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context.report({
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node: node,
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message: 'Unexpected empty named import block',
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fix: function () {function fix(fixer) {
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return fixer.removeRange(getEmptyBlockRange(program.tokens, idx));
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}return fix;}() });
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}
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}
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});
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});
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}return ProgramExit;}() };
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}return create;}() };
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