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packages/babel-generator/src/printer.js

Summary

Maintainability
F
3 days
Test Coverage

File printer.js has 430 lines of code (exceeds 250 allowed). Consider refactoring.
Open

import isInteger from "lodash/isInteger";
import repeat from "lodash/repeat";
import Buffer from "./buffer";
import * as n from "./node";
import * as t from "@babel/types";
Severity: Minor
Found in packages/babel-generator/src/printer.js - About 6 hrs to fix

    Printer has 42 functions (exceeds 20 allowed). Consider refactoring.
    Open

    export default class Printer {
  constructor(format, map) {
    this.format = format || {};
    this._buf = new Buffer(map);
  }
    Severity: Minor
    Found in packages/babel-generator/src/printer.js - About 5 hrs to fix

      Function _printComment has a Cognitive Complexity of 15 (exceeds 5 allowed). Consider refactoring.
      Open

        _printComment(comment, skipNewLines?: boolean) {
    if (!this.format.shouldPrintComment(comment.value)) return;

    // Some plugins use this to mark comments as removed using the AST-root 'comments' property,
    // where they can't manually mutate the AST node comment lists.
      Severity: Minor
      Found in packages/babel-generator/src/printer.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 printJoin has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
      Open

        printJoin(nodes: ?Array, parent: Object, opts = {}) {
    if (!nodes?.length) return;

    if (opts.indent) this.indent();
      Severity: Minor
      Found in packages/babel-generator/src/printer.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 _maybeAddParen has a Cognitive Complexity of 13 (exceeds 5 allowed). Consider refactoring.
      Open

        _maybeAddParen(str: string): void {
    // see startTerminatorless() instance method
    const parenPushNewlineState = this._parenPushNewlineState;
    if (!parenPushNewlineState) return;
      Severity: Minor
      Found in packages/babel-generator/src/printer.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 print has 37 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

        print(node, parent) {
    if (!node) return;

    const oldConcise = this.format.concise;
    if (node._compact) {
      Severity: Minor
      Found in packages/babel-generator/src/printer.js - About 1 hr to fix

        Function _printNewline has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
        Open

          _printNewline(leading, node, parent, opts) {
    // Fast path since 'this.newline' does nothing when not tracking lines.
    if (this.format.retainLines || this.format.compact) return;

    // Fast path for concise since 'this.newline' just inserts a space when
        Severity: Minor
        Found in packages/babel-generator/src/printer.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

        Consider simplifying this complex logical expression.
        Open

            if (
      (str === "--" && this.endsWith("!")) ||
      // Need spaces for operators of the same kind to avoid: `a+++b`
      (str[0] === "+" && this.endsWith("+")) ||
      (str[0] === "-" && this.endsWith("-")) ||
        Severity: Critical
        Found in packages/babel-generator/src/printer.js - About 1 hr to fix

          Function _printComment has 33 lines of code (exceeds 25 allowed). Consider refactoring.
          Open

            _printComment(comment, skipNewLines?: boolean) {
    if (!this.format.shouldPrintComment(comment.value)) return;

    // Some plugins use this to mark comments as removed using the AST-root 'comments' property,
    // where they can't manually mutate the AST node comment lists.
          Severity: Minor
          Found in packages/babel-generator/src/printer.js - About 1 hr to fix

            Function _maybeAddParen has 29 lines of code (exceeds 25 allowed). Consider refactoring.
            Open

              _maybeAddParen(str: string): void {
    // see startTerminatorless() instance method
    const parenPushNewlineState = this._parenPushNewlineState;
    if (!parenPushNewlineState) return;
            Severity: Minor
            Found in packages/babel-generator/src/printer.js - About 1 hr to fix

              Function print has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
              Open

                print(node, parent) {
    if (!node) return;

    const oldConcise = this.format.concise;
    if (node._compact) {
              Severity: Minor
              Found in packages/babel-generator/src/printer.js - About 55 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 newline has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
              Open

                newline(i?: number): void {
    if (this.format.retainLines || this.format.compact) return;

    if (this.format.concise) {
      this.space();
              Severity: Minor
              Found in packages/babel-generator/src/printer.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 token has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
              Open

                token(str: string): void {
    // space is mandatory to avoid outputting <!--
    // http://javascript.spec.whatwg.org/#comment-syntax
    if (
      (str === "--" && this.endsWith("!")) ||
              Severity: Minor
              Found in packages/babel-generator/src/printer.js - About 35 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 too many return statements within this function.
              Open

                      return;
              Severity: Major
              Found in packages/babel-generator/src/printer.js - About 30 mins to fix

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

                  dedent(): void {
    if (this.format.compact || this.format.concise) return;

    this._indent--;
  }
                Severity: Minor
                Found in packages/babel-generator/src/printer.js and 1 other location - About 45 mins to fix
                packages/babel-generator/src/printer.js on lines 64..68

                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 50.

                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

                  indent(): void {
    if (this.format.compact || this.format.concise) return;

    this._indent++;
  }
                Severity: Minor
                Found in packages/babel-generator/src/printer.js and 1 other location - About 45 mins to fix
                packages/babel-generator/src/printer.js on lines 74..78

                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 50.

                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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