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lts/lib/internal/bootstrap/switches/is_main_thread.js

Summary

Maintainability
F
4 days
Test Coverage

Function getStdin has 59 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function getStdin() {
  if (stdin) return stdin;
  const fd = 0;

  switch (guessHandleType(fd)) {
Severity: Major
Found in lts/lib/internal/bootstrap/switches/is_main_thread.js - About 2 hrs to fix

    Function createWritableStdioStream has 41 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

    function createWritableStdioStream(fd) {
  let stream;
  // Note stream._type is used for test-module-load-list.js
  switch (guessHandleType(fd)) {
    case 'TTY':
    Severity: Minor
    Found in lts/lib/internal/bootstrap/switches/is_main_thread.js - About 1 hr to fix

      Function getStdin has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.
      Open

      function getStdin() {
  if (stdin) return stdin;
  const fd = 0;

  switch (guessHandleType(fd)) {
      Severity: Minor
      Found in lts/lib/internal/bootstrap/switches/is_main_thread.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

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

      function getStdin() {
  if (stdin) return stdin;
  const fd = 0;

  switch (guessHandleType(fd)) {
      Severity: Major
      Found in lts/lib/internal/bootstrap/switches/is_main_thread.js and 1 other location - About 2 days to fix
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 144..228

      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 507.

      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 4 locations. Consider refactoring.
      Open

      function getStderr() {
  if (stderr) return stderr;
  stderr = createWritableStdioStream(2);
  stderr.destroySoon = stderr.destroy;
  // Override _destroy so that the fd is never actually closed.
      Severity: Major
      Found in lts/lib/internal/bootstrap/switches/is_main_thread.js and 3 other locations - About 2 hrs to fix
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 120..130
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 132..142
      lts/lib/internal/bootstrap/switches/is_main_thread.js on lines 115..125

      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 92.

      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 4 locations. Consider refactoring.
      Open

      function getStdout() {
  if (stdout) return stdout;
  stdout = createWritableStdioStream(1);
  stdout.destroySoon = stdout.destroy;
  // Override _destroy so that the fd is never actually closed.
      Severity: Major
      Found in lts/lib/internal/bootstrap/switches/is_main_thread.js and 3 other locations - About 2 hrs to fix
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 120..130
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 132..142
      lts/lib/internal/bootstrap/switches/is_main_thread.js on lines 127..137

      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 92.

      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

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

      function dummyDestroy(err, cb) {
  cb(err);

  // We need to emit 'close' anyway so that the closing
  // of the stream is observable. We just make sure we
      Severity: Major
      Found in lts/lib/internal/bootstrap/switches/is_main_thread.js and 1 other location - About 1 hr to fix
      current/lib/internal/bootstrap/switches/is_main_thread.js on lines 101..114

      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 73.

      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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