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packages/babel-core/src/config/config-chain.js

Summary

Maintainability
F
3 days
Test Coverage

File config-chain.js has 596 lines of code (exceeds 250 allowed). Consider refactoring.
Open

// @flow

import path from "path";
import buildDebug from "debug";
import type { Handler } from "gensync";
Severity: Major
Found in packages/babel-core/src/config/config-chain.js - About 1 day to fix

    Function buildRootChain has 82 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

    export function* buildRootChain(
  opts: ValidatedOptions,
  context: ConfigContext,
): Handler<RootConfigChain | null> {
  const programmaticChain = yield* loadProgrammaticChain(
    Severity: Major
    Found in packages/babel-core/src/config/config-chain.js - About 3 hrs to fix

      Function buildRootChain has a Cognitive Complexity of 23 (exceeds 5 allowed). Consider refactoring.
      Open

      export function* buildRootChain(
  opts: ValidatedOptions,
  context: ConfigContext,
): Handler<RootConfigChain | null> {
  const programmaticChain = yield* loadProgrammaticChain(
      Severity: Minor
      Found in packages/babel-core/src/config/config-chain.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 dedupDescriptors has a Cognitive Complexity of 15 (exceeds 5 allowed). Consider refactoring.
      Open

      function dedupDescriptors(
  items: Array<UnloadedDescriptor>,
): Array<UnloadedDescriptor> {
  const map: Map<
    Function,
      Severity: Minor
      Found in packages/babel-core/src/config/config-chain.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 dedupDescriptors has 29 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

      function dedupDescriptors(
  items: Array<UnloadedDescriptor>,
): Array<UnloadedDescriptor> {
  const map: Map<
    Function,
      Severity: Minor
      Found in packages/babel-core/src/config/config-chain.js - About 1 hr to fix

        Function mergeExtendsChain has 5 arguments (exceeds 4 allowed). Consider refactoring.
        Open

          chain: ConfigChain,
  opts: ValidatedOptions,
  dirname: string,
  context: ConfigContext,
  files: Set<ConfigFile>,
        Severity: Minor
        Found in packages/babel-core/src/config/config-chain.js - About 35 mins to fix

          Function buildOverrideEnvDescriptors has 5 arguments (exceeds 4 allowed). Consider refactoring.
          Open

            { dirname, options },
  alias,
  descriptors,
  index,
  envName,
          Severity: Minor
          Found in packages/babel-core/src/config/config-chain.js - About 35 mins to fix

            Avoid too many return statements within this function.
            Open

              return {
    plugins: dedupDescriptors(chain.plugins),
    presets: dedupDescriptors(chain.presets),
    options: chain.options.map(o => normalizeOptions(o)),
    ignore: ignoreFile || undefined,
            Severity: Major
            Found in packages/babel-core/src/config/config-chain.js - About 30 mins to fix

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

              const validateBabelrcFile = makeWeakCacheSync(
  (file: ConfigFile): ValidatedFile => ({
    filepath: file.filepath,
    dirname: file.dirname,
    options: validate("babelrcfile", file.options),
              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 280..286

              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 60.

              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 validateConfigFile = makeWeakCacheSync(
  (file: ConfigFile): ValidatedFile => ({
    filepath: file.filepath,
    dirname: file.dirname,
    options: validate("configfile", file.options),
              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 288..294

              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 60.

              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

              const loadPresetOverridesEnvDescriptors = makeWeakCacheSync(
  (preset: PresetInstance) =>
    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 356..369

              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

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