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packages/babel-plugin-transform-block-scoping/src/index.js

Summary

Maintainability
F
6 days
Test Coverage

File index.js has 683 lines of code (exceeds 250 allowed). Consider refactoring.
Open

import { declare } from "@babel/helper-plugin-utils";
import type NodePath from "@babel/traverse";
import type Scope from "@babel/traverse";
import { visitor as tdzVisitor } from "./tdz";
import values from "lodash/values";
Severity: Major
Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 1 day to fix

    Function buildHas has a Cognitive Complexity of 31 (exceeds 5 allowed). Consider refactoring.
    Open

      buildHas(ret: string) {
    const body = this.body;

    let retCheck;
    const has = this.has;
    Severity: Minor
    Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 4 hrs 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 wrapClosure has 98 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      wrapClosure() {
    if (this.throwIfClosureRequired) {
      throw this.blockPath.buildCodeFrameError(
        "Compiling let/const in this block would add a closure " +
          "(throwIfClosureRequired).",
    Severity: Major
    Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 3 hrs to fix

      Function getLetReferences has a Cognitive Complexity of 22 (exceeds 5 allowed). Consider refactoring.
      Open

        getLetReferences() {
    const block = this.block;

    let declarators = [];
      Severity: Minor
      Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 3 hrs 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 BreakStatement|ContinueStatement|ReturnStatement has a Cognitive Complexity of 18 (exceeds 5 allowed). Consider refactoring.
      Open

        "BreakStatement|ContinueStatement|ReturnStatement"(path, state) {
    const { node, scope } = path;
    if (node[this.LOOP_IGNORE]) return;

    let replace;
      Severity: Minor
      Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 2 hrs 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 getLetReferences has 60 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

        getLetReferences() {
    const block = this.block;

    let declarators = [];
      Severity: Major
      Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 2 hrs to fix

        Function wrapClosure has a Cognitive Complexity of 17 (exceeds 5 allowed). Consider refactoring.
        Open

          wrapClosure() {
    if (this.throwIfClosureRequired) {
      throw this.blockPath.buildCodeFrameError(
        "Compiling let/const in this block would add a closure " +
          "(throwIfClosureRequired).",
        Severity: Minor
        Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 2 hrs 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 updateScopeInfo has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
        Open

          updateScopeInfo(wrappedInClosure) {
    const blockScope = this.blockPath.scope;

    const parentScope =
      blockScope.getFunctionParent() || blockScope.getProgramParent();
        Severity: Minor
        Found in packages/babel-plugin-transform-block-scoping/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 buildHas has 43 lines of code (exceeds 25 allowed). Consider refactoring.
        Open

          buildHas(ret: string) {
    const body = this.body;

    let retCheck;
    const has = this.has;
        Severity: Minor
        Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 1 hr to fix

          Function remap has a Cognitive Complexity of 13 (exceeds 5 allowed). Consider refactoring.
          Open

            remap() {
    const letRefs = this.letReferences;
    const outsideLetRefs = this.outsideLetReferences;
    const scope = this.scope;
    const blockPathScope = this.blockPath.scope;
          Severity: Minor
          Found in packages/babel-plugin-transform-block-scoping/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 convertBlockScopedToVar has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
          Open

          function convertBlockScopedToVar(
  path,
  node,
  parent,
  scope,
          Severity: Minor
          Found in packages/babel-plugin-transform-block-scoping/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 enter has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
          Open

            enter(path, self) {
    const { node, parent } = path;

    if (path.isForStatement()) {
      if (isVar(node.init, node)) {
          Severity: Minor
          Found in packages/babel-plugin-transform-block-scoping/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 addContinuations has 34 lines of code (exceeds 25 allowed). Consider refactoring.
          Open

            addContinuations(fn) {
    const state = {
      reassignments: {},
      returnStatements: [],
      outsideReferences: this.outsideLetReferences,
          Severity: Minor
          Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 1 hr to fix

            Function BreakStatement|ContinueStatement|ReturnStatement has 33 lines of code (exceeds 25 allowed). Consider refactoring.
            Open

              "BreakStatement|ContinueStatement|ReturnStatement"(path, state) {
    const { node, scope } = path;
    if (node[this.LOOP_IGNORE]) return;

    let replace;
            Severity: Minor
            Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 1 hr to fix

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

                checkConstants() {
    const scope = this.scope;
    const state = this.state;

    for (const name of Object.keys(scope.bindings)) {
              Severity: Minor
              Found in packages/babel-plugin-transform-block-scoping/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 checkConstants has 26 lines of code (exceeds 25 allowed). Consider refactoring.
              Open

                checkConstants() {
    const scope = this.scope;
    const state = this.state;

    for (const name of Object.keys(scope.bindings)) {
              Severity: Minor
              Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 1 hr to fix

                Function run has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
                Open

                  run() {
    const block = this.block;
    if (DONE.has(block)) return;
    DONE.add(block);
                Severity: Minor
                Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 45 mins 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

                Avoid deeply nested control flow statements.
                Open

                            if (t.isBreakStatement(caseConsequent) && !caseConsequent.label) {
              if (!this.loopLabel) {
                this.loopLabel = this.scope.generateUidIdentifier("loop");
              }
              caseConsequent.label = t.cloneNode(this.loopLabel);
                Severity: Major
                Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 45 mins to fix

                  Function enter has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
                  Open

                    enter(path, state) {
    if (path.isAssignmentExpression() || path.isUpdateExpression()) {
      for (const name of Object.keys(path.getBindingIdentifiers())) {
        if (
          state.outsideReferences[name] !==
                  Severity: Minor
                  Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 45 mins 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 convertBlockScopedToVar has 5 arguments (exceeds 4 allowed). Consider refactoring.
                  Open

                    path,
  node,
  parent,
  scope,
  moveBindingsToParent = false,
                  Severity: Minor
                  Found in packages/babel-plugin-transform-block-scoping/src/index.js - About 35 mins to fix

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

                      Loop(path, state) {
    const oldIgnoreLabeless = state.ignoreLabeless;
    state.ignoreLabeless = true;
    path.traverse(loopVisitor, state);
    state.ignoreLabeless = oldIgnoreLabeless;
                    Severity: Major
                    Found in packages/babel-plugin-transform-block-scoping/src/index.js and 1 other location - About 1 hr to fix
                    packages/babel-plugin-transform-block-scoping/src/index.js on lines 287..293

                    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 65.

                    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

                      SwitchCase(path, state) {
    const oldInSwitchCase = state.inSwitchCase;
    state.inSwitchCase = true;
    path.traverse(loopVisitor, state);
    state.inSwitchCase = oldInSwitchCase;
                    Severity: Major
                    Found in packages/babel-plugin-transform-block-scoping/src/index.js and 1 other location - About 1 hr to fix
                    packages/babel-plugin-transform-block-scoping/src/index.js on lines 275..281

                    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 65.

                    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

                            if (nodes.length === 1) {
          node.init = nodes[0];
        } else {
          node.init = t.sequenceExpression(nodes);
        }
                    Severity: Minor
                    Found in packages/babel-plugin-transform-block-scoping/src/index.js and 1 other location - About 55 mins to fix
                    packages/babel-helper-bindify-decorators/src/index.js on lines 34..38

                    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 53.

                    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

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