newline-after-import.js 21 KB

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  1. 'use strict';
  2. var _staticRequire = require('../core/staticRequire');var _staticRequire2 = _interopRequireDefault(_staticRequire);
  3. var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);
  4. var _debug = require('debug');var _debug2 = _interopRequireDefault(_debug);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { 'default': obj };}
  5. var log = (0, _debug2['default'])('eslint-plugin-import:rules:newline-after-import');
  6. //------------------------------------------------------------------------------
  7. // Rule Definition
  8. //------------------------------------------------------------------------------
  9. /**
  10. * @fileoverview Rule to enforce new line after import not followed by another import.
  11. * @author Radek Benkel
  12. */function containsNodeOrEqual(outerNode, innerNode) {return outerNode.range[0] <= innerNode.range[0] && outerNode.range[1] >= innerNode.range[1];}
  13. function getScopeBody(scope) {
  14. if (scope.block.type === 'SwitchStatement') {
  15. log('SwitchStatement scopes not supported');
  16. return null;
  17. }var
  18. body = scope.block.body;
  19. if (body && body.type === 'BlockStatement') {
  20. return body.body;
  21. }
  22. return body;
  23. }
  24. function findNodeIndexInScopeBody(body, nodeToFind) {
  25. return body.findIndex(function (node) {return containsNodeOrEqual(node, nodeToFind);});
  26. }
  27. function getLineDifference(node, nextNode) {
  28. return nextNode.loc.start.line - node.loc.end.line;
  29. }
  30. function isClassWithDecorator(node) {
  31. return node.type === 'ClassDeclaration' && node.decorators && node.decorators.length;
  32. }
  33. function isExportDefaultClass(node) {
  34. return node.type === 'ExportDefaultDeclaration' && node.declaration.type === 'ClassDeclaration';
  35. }
  36. function isExportNameClass(node) {
  37. return node.type === 'ExportNamedDeclaration' && node.declaration && node.declaration.type === 'ClassDeclaration';
  38. }
  39. module.exports = {
  40. meta: {
  41. type: 'layout',
  42. docs: {
  43. url: (0, _docsUrl2['default'])('newline-after-import') },
  44. fixable: 'whitespace',
  45. schema: [
  46. {
  47. 'type': 'object',
  48. 'properties': {
  49. 'count': {
  50. 'type': 'integer',
  51. 'minimum': 1 } },
  52. 'additionalProperties': false }] },
  53. create: function () {function create(context) {
  54. var level = 0;
  55. var requireCalls = [];
  56. function checkForNewLine(node, nextNode, type) {
  57. if (isExportDefaultClass(nextNode) || isExportNameClass(nextNode)) {
  58. var classNode = nextNode.declaration;
  59. if (isClassWithDecorator(classNode)) {
  60. nextNode = classNode.decorators[0];
  61. }
  62. } else if (isClassWithDecorator(nextNode)) {
  63. nextNode = nextNode.decorators[0];
  64. }
  65. var options = context.options[0] || { count: 1 };
  66. var lineDifference = getLineDifference(node, nextNode);
  67. var EXPECTED_LINE_DIFFERENCE = options.count + 1;
  68. if (lineDifference < EXPECTED_LINE_DIFFERENCE) {
  69. var column = node.loc.start.column;
  70. if (node.loc.start.line !== node.loc.end.line) {
  71. column = 0;
  72. }
  73. context.report({
  74. loc: {
  75. line: node.loc.end.line,
  76. column: column },
  77. message: 'Expected ' + String(options.count) + ' empty line' + (options.count > 1 ? 's' : '') + ' after ' + String(
  78. type) + ' statement not followed by another ' + String(type) + '.',
  79. fix: function () {function fix(fixer) {return fixer.insertTextAfter(
  80. node,
  81. '\n'.repeat(EXPECTED_LINE_DIFFERENCE - lineDifference));}return fix;}() });
  82. }
  83. }
  84. function incrementLevel() {
  85. level++;
  86. }
  87. function decrementLevel() {
  88. level--;
  89. }
  90. function checkImport(node) {var
  91. parent = node.parent;
  92. var nodePosition = parent.body.indexOf(node);
  93. var nextNode = parent.body[nodePosition + 1];
  94. // skip "export import"s
  95. if (node.type === 'TSImportEqualsDeclaration' && node.isExport) {
  96. return;
  97. }
  98. if (nextNode && nextNode.type !== 'ImportDeclaration' && (nextNode.type !== 'TSImportEqualsDeclaration' || nextNode.isExport)) {
  99. checkForNewLine(node, nextNode, 'import');
  100. }
  101. }
  102. return {
  103. ImportDeclaration: checkImport,
  104. TSImportEqualsDeclaration: checkImport,
  105. CallExpression: function () {function CallExpression(node) {
  106. if ((0, _staticRequire2['default'])(node) && level === 0) {
  107. requireCalls.push(node);
  108. }
  109. }return CallExpression;}(),
  110. 'Program:exit': function () {function ProgramExit() {
  111. log('exit processing for', context.getPhysicalFilename ? context.getPhysicalFilename() : context.getFilename());
  112. var scopeBody = getScopeBody(context.getScope());
  113. log('got scope:', scopeBody);
  114. requireCalls.forEach(function (node, index) {
  115. var nodePosition = findNodeIndexInScopeBody(scopeBody, node);
  116. log('node position in scope:', nodePosition);
  117. var statementWithRequireCall = scopeBody[nodePosition];
  118. var nextStatement = scopeBody[nodePosition + 1];
  119. var nextRequireCall = requireCalls[index + 1];
  120. if (nextRequireCall && containsNodeOrEqual(statementWithRequireCall, nextRequireCall)) {
  121. return;
  122. }
  123. if (nextStatement && (
  124. !nextRequireCall || !containsNodeOrEqual(nextStatement, nextRequireCall))) {
  125. checkForNewLine(statementWithRequireCall, nextStatement, 'require');
  126. }
  127. });
  128. }return ProgramExit;}(),
  129. FunctionDeclaration: incrementLevel,
  130. FunctionExpression: incrementLevel,
  131. ArrowFunctionExpression: incrementLevel,
  132. BlockStatement: incrementLevel,
  133. ObjectExpression: incrementLevel,
  134. Decorator: incrementLevel,
  135. 'FunctionDeclaration:exit': decrementLevel,
  136. 'FunctionExpression:exit': decrementLevel,
  137. 'ArrowFunctionExpression:exit': decrementLevel,
  138. 'BlockStatement:exit': decrementLevel,
  139. 'ObjectExpression:exit': decrementLevel,
  140. 'Decorator:exit': decrementLevel };
  141. }return create;}() };
  142. //# 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* @fileoverview Rule to enforce new line after import not followed by another import.\n * @author Radek Benkel\n */\n\nimport isStaticRequire from '../core/staticRequire';\nimport docsUrl from '../docsUrl';\n\nimport debug from 'debug';\nconst log = debug('eslint-plugin-import:rules:newline-after-import');\n\n//------------------------------------------------------------------------------\n// Rule Definition\n//------------------------------------------------------------------------------\n\nfunction containsNodeOrEqual(outerNode, innerNode) {\n  return outerNode.range[0] <= innerNode.range[0] && outerNode.range[1] >= innerNode.range[1];\n}\n\nfunction getScopeBody(scope) {\n  if (scope.block.type === 'SwitchStatement') {\n    log('SwitchStatement scopes not supported');\n    return null;\n  }\n\n  const { body } = scope.block;\n  if (body && body.type === 'BlockStatement') {\n    return body.body;\n  }\n\n  return body;\n}\n\nfunction findNodeIndexInScopeBody(body, nodeToFind) {\n  return body.findIndex((node) => containsNodeOrEqual(node, nodeToFind));\n}\n\nfunction getLineDifference(node, nextNode) {\n  return nextNode.loc.start.line - node.loc.end.line;\n}\n\nfunction isClassWithDecorator(node) {\n  return node.type === 'ClassDeclaration' && node.decorators && node.decorators.length;\n}\n\nfunction isExportDefaultClass(node) {\n  return node.type === 'ExportDefaultDeclaration' && node.declaration.type === 'ClassDeclaration';\n}\n\nfunction isExportNameClass(node) {\n\n  return node.type === 'ExportNamedDeclaration' && node.declaration && node.declaration.type === 'ClassDeclaration';\n}\n\nmodule.exports = {\n  meta: {\n    type: 'layout',\n    docs: {\n      url: docsUrl('newline-after-import'),\n    },\n    fixable: 'whitespace',\n    schema: [\n      {\n        'type': 'object',\n        'properties': {\n          'count': {\n            'type': 'integer',\n            'minimum': 1,\n          },\n        },\n        'additionalProperties': false,\n      },\n    ],\n  },\n  create: function (context) {\n    let level = 0;\n    const requireCalls = [];\n\n    function checkForNewLine(node, nextNode, type) {\n      if (isExportDefaultClass(nextNode) || isExportNameClass(nextNode)) {\n        const classNode = nextNode.declaration;\n\n        if (isClassWithDecorator(classNode)) {\n          nextNode = classNode.decorators[0];\n        }\n      } else if (isClassWithDecorator(nextNode)) {\n        nextNode = nextNode.decorators[0];\n      }\n\n      const options = context.options[0] || { count: 1 };\n      const lineDifference = getLineDifference(node, nextNode);\n      const EXPECTED_LINE_DIFFERENCE = options.count + 1;\n\n      if (lineDifference < EXPECTED_LINE_DIFFERENCE) {\n        let column = node.loc.start.column;\n\n        if (node.loc.start.line !== node.loc.end.line) {\n          column = 0;\n        }\n\n        context.report({\n          loc: {\n            line: node.loc.end.line,\n            column,\n          },\n          message: `Expected ${options.count} empty line${options.count > 1 ? 's' : ''} \\\nafter ${type} statement not followed by another ${type}.`,\n          fix: fixer => fixer.insertTextAfter(\n            node,\n            '\\n'.repeat(EXPECTED_LINE_DIFFERENCE - lineDifference)\n          ),\n        });\n      }\n    }\n\n    function incrementLevel() {\n      level++;\n    }\n    function decrementLevel() {\n      level--;\n    }\n\n    function checkImport(node) {\n      const { parent } = node;\n      const nodePosition = parent.body.indexOf(node);\n      const nextNode = parent.body[nodePosition + 1];\n\n      // skip \"export import\"s\n      if (node.type === 'TSImportEqualsDeclaration' && node.isExport) {\n        return;\n      }\n\n      if (nextNode && nextNode.type !== 'ImportDeclaration' && (nextNode.type !== 'TSImportEqualsDeclaration' || nextNode.isExport)) {\n        checkForNewLine(node, nextNode, 'import');\n      }\n    }\n\n    return {\n      ImportDeclaration: checkImport,\n      TSImportEqualsDeclaration: checkImport,\n      CallExpression: function(node) {\n        if (isStaticRequire(node) && level === 0) {\n          requireCalls.push(node);\n        }\n      },\n      'Program:exit': function () {\n        log('exit processing for', context.getPhysicalFilename ? context.getPhysicalFilename() : context.getFilename());\n        const scopeBody = getScopeBody(context.getScope());\n        log('got scope:', scopeBody);\n\n        requireCalls.forEach(function (node, index) {\n          const nodePosition = findNodeIndexInScopeBody(scopeBody, node);\n          log('node position in scope:', nodePosition);\n\n          const statementWithRequireCall = scopeBody[nodePosition];\n          const nextStatement = scopeBody[nodePosition + 1];\n          const nextRequireCall = requireCalls[index + 1];\n\n          if (nextRequireCall && containsNodeOrEqual(statementWithRequireCall, nextRequireCall)) {\n            return;\n          }\n\n          if (nextStatement &&\n             (!nextRequireCall || !containsNodeOrEqual(nextStatement, nextRequireCall))) {\n\n            checkForNewLine(statementWithRequireCall, nextStatement, 'require');\n          }\n        });\n      },\n      FunctionDeclaration: incrementLevel,\n      FunctionExpression: incrementLevel,\n      ArrowFunctionExpression: incrementLevel,\n      BlockStatement: incrementLevel,\n      ObjectExpression: incrementLevel,\n      Decorator: incrementLevel,\n      'FunctionDeclaration:exit': decrementLevel,\n      'FunctionExpression:exit': decrementLevel,\n      'ArrowFunctionExpression:exit': decrementLevel,\n      'BlockStatement:exit': decrementLevel,\n      'ObjectExpression:exit': decrementLevel,\n      'Decorator:exit': decrementLevel,\n    };\n  },\n};\n"]}