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Similar blocks of code found in 2 locations. Consider refactoring.
Open

export const RestProperty = {
  types: ["RestElement"],
  checkPath(path: NodePath): boolean {
    return path.parentPath && path.parentPath.isObjectPattern();
  },
Severity: Major
Found in packages/babel-traverse/src/path/lib/virtual-types.js and 1 other location - About 1 hr to fix
packages/babel-traverse/src/path/lib/virtual-types.js on lines 136..141

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 57.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

  resetEndLocation(
    node: NodeBase,
    end?: number = this.state.lastTokEnd,
    endLoc?: Position = this.state.lastTokEndLoc,
  ): void {
Severity: Major
Found in packages/babel-parser/src/parser/node.js and 1 other location - About 1 hr to fix
packages/babel-parser/src/parser/node.js on lines 100..104

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 57.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

const loadFileOverridesEnvDescriptors = makeWeakCacheSync(
  (file: ValidatedFile) =>
    makeStrongCacheSync((index: number) =>
      makeStrongCacheSync((envName: string) =>
        buildOverrideEnvDescriptors(
Severity: Major
Found in packages/babel-core/src/config/config-chain.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/config-chain.js on lines 110..123

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 57.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

              path.replaceWith(
                t.expressionStatement(
                  t.assignmentExpression(
                    "=",
                    t.cloneNode(path.node.id),
Severity: Major
Found in packages/babel-plugin-transform-modules-systemjs/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-modules-systemjs/src/index.js on lines 365..373

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 57.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Function getPlugins has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

function getPlugins(test) {
  const flowOptions = { all: true };

  const plugins = [
    "dynamicImport",
Severity: Minor
Found in scripts/parser-tests/flow/index.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function isRedeclaredInScope has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  isRedeclaredInScope(
    scope: TypeScriptScope,
    name: string,
    bindingType: BindingTypes,
  ): boolean {
Severity: Minor
Found in packages/babel-parser/src/plugins/typescript/scope.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function declarePrivateName has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  declarePrivateName(
    name: string,
    elementType: ClassElementTypes,
    pos: number,
  ) {
Severity: Minor
Found in packages/babel-parser/src/util/class-scope.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function parseNamedImportSpecifiers has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  parseNamedImportSpecifiers(node: N.ImportDeclaration) {
    let first = true;
    this.expect(tt.braceL);
    while (!this.eat(tt.braceR)) {
      if (first) {
Severity: Minor
Found in packages/babel-parser/src/parser/statement.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function parseTryStatement has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  parseTryStatement(node: N.TryStatement): N.TryStatement {
    this.next();

    node.block = this.parseBlock();
    node.handler = null;
Severity: Minor
Found in packages/babel-parser/src/parser/statement.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function parseNew has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  parseNew(): N.NewExpression | N.MetaProperty {
    const node = this.startNode();

    let meta = this.startNode();
    this.next();
Severity: Minor
Found in packages/babel-parser/src/parser/expression.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function parseAwait has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  parseAwait(): N.AwaitExpression {
    const node = this.startNode();

    this.next();
Severity: Minor
Found in packages/babel-parser/src/parser/expression.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function toStatement has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

export default function toStatement(node: Object, ignore?: boolean) {
  if (isStatement(node)) {
    return node;
  }
Severity: Minor
Found in packages/babel-types/src/converters/toStatement.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function buildExportNameListDeclaration has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

function buildExportNameListDeclaration(
  programPath: NodePath,
  metadata: ModuleMetadata,
) {
  const exportedVars = Object.create(null);
Severity: Minor
Found in packages/babel-helper-module-transforms/src/index.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function normalizeModuleAndLoadMetadata has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

export default function normalizeModuleAndLoadMetadata(
  programPath: NodePath,
  exportName?: string,
  {
    noInterop = false,
Severity: Minor
Found in packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function inherits has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

export default function inherits<T: Object>(child: T, parent: Object): T {
  if (!child || !parent) return child;

  // optionally inherit specific properties if not null
  for (const key of (INHERIT_KEYS.optional: Array<string>)) {
Severity: Minor
Found in packages/babel-types/src/modifications/inherits.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function ArrayExpression has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

export function ArrayExpression(node: Object) {
  const elems = node.elements;
  const len = elems.length;

  this.token("[");
Severity: Minor
Found in packages/babel-generator/src/generators/types.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function extractElementDescriptor has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

function extractElementDescriptor(/* this: File, */ classRef, superRef, path) {
  const { node, scope } = path;
  const isMethod = path.isClassMethod();

  if (path.isPrivate()) {
Severity: Minor
Found in packages/babel-helper-create-class-features-plugin/src/decorators.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function ReferencedIdentifier has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

  ReferencedIdentifier(path) {
    const {
      seen,
      buildImportReference,
      scope,
Severity: Minor
Found in packages/babel-helper-module-transforms/src/rewrite-live-references.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function createTemplateBuilder has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

export default function createTemplateBuilder<T>(
  formatter: Formatter<T>,
  defaultOpts?: TemplateOpts,
): TemplateBuilder<T> {
  const templateFnCache = new WeakMap();
Severity: Minor
Found in packages/babel-template/src/builder.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function buildExportInitializationStatements has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

function buildExportInitializationStatements(
  programPath: NodePath,
  metadata: ModuleMetadata,
  loose: boolean = false,
) {
Severity: Minor
Found in packages/babel-helper-module-transforms/src/index.js - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

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