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

type AbilityCanProps<
  T extends Abilities,
  Else = IfString<T, { do: T } | { I: T }>
> = T extends AbilityTuple
  ? { do: T[0], on: T[1], field?: string } |
Severity: Major
Found in packages/casl-react/src/Can.ts and 1 other location - About 1 day to fix
packages/casl-vue/src/component/can.ts on lines 13..21

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 246.

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

type AbilityCanProps<
  T extends Abilities,
  Else = IfString<T, { do: T } | { I: T }>
> = T extends AbilityTuple
  ? { do: T[0], on: T[1], field?: string } |
Severity: Major
Found in packages/casl-vue/src/component/can.ts and 1 other location - About 1 day to fix
packages/casl-react/src/Can.ts on lines 14..22

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 246.

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

    this.can = (
      action: string | string[],
      subject?: SubjectType | SubjectType[],
      conditionsOrFields?: string | string[] | Generics<T>['conditions'],
      conditions?: Generics<T>['conditions']
Severity: Major
Found in packages/casl-ability/src/AbilityBuilder.ts and 1 other location - About 2 hrs to fix
packages/casl-ability/src/AbilityBuilder.ts on lines 103..108

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 94.

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

    this.cannot = (
      action: string | string[],
      subject?: SubjectType | SubjectType[],
      conditionsOrFields?: string | string[] | Generics<T>['conditions'],
      conditions?: Generics<T>['conditions']
Severity: Major
Found in packages/casl-ability/src/AbilityBuilder.ts and 1 other location - About 2 hrs to fix
packages/casl-ability/src/AbilityBuilder.ts on lines 97..102

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 94.

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 hasSome: ArrayInterpreter<unknown[]> = (condition, object, { get }) => {
  const value = get(object, condition.field);
  return Array.isArray(value) && condition.value.some(v => value.includes(v));
};
Severity: Major
Found in packages/casl-prisma/src/prisma/interpretPrismaQuery.ts and 1 other location - About 2 hrs to fix
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 56..59

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 88.

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 hasEvery: ArrayInterpreter<unknown[]> = (condition, object, { get }) => {
  const value = get(object, condition.field);
  return Array.isArray(value) && condition.value.every(v => value.includes(v));
};
Severity: Major
Found in packages/casl-prisma/src/prisma/interpretPrismaQuery.ts and 1 other location - About 2 hrs to fix
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 52..55

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 88.

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

  private _indexAndAnalyzeRules(rawRules: RawRuleFrom<A, Conditions>[]) {
    const indexedRules: IndexTree<A, Conditions> = new Map();
    let typeOfSubjectType: string | undefined;

    for (let i = rawRules.length - 1; i >= 0; i--) {
Severity: Minor
Found in packages/casl-ability/src/RuleIndex.ts - 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

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

const defaultInstructions = {
  $eq,
  $ne,
  $lt,
  $lte,
Severity: Major
Found in packages/casl-ability/src/matchers/conditions.ts and 1 other location - About 2 hrs to fix
packages/casl-ability/src/matchers/conditions.ts on lines 53..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 78.

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 defaultInterpreters = {
  eq,
  ne,
  lt,
  lte,
Severity: Major
Found in packages/casl-ability/src/matchers/conditions.ts and 1 other location - About 2 hrs to fix
packages/casl-ability/src/matchers/conditions.ts on lines 37..52

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 78.

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 within: FieldInstruction<unknown[]> = {
  type: 'field',
  validate(instruction, value) {
    if (!Array.isArray(value)) {
      throw ParsingQueryError.invalidArgument(instruction.name, value, 'an array');
Severity: Major
Found in packages/casl-prisma/src/prisma/PrismaQueryParser.ts and 1 other location - About 1 hr to fix
packages/casl-prisma/src/prisma/PrismaQueryParser.ts on lines 128..135

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 69.

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 hasSome: FieldInstruction<unknown[]> = {
  type: 'field',
  validate(instruction, value) {
    if (!Array.isArray(value)) {
      throw ParsingQueryError.invalidArgument(instruction.name, value, 'an array');
Severity: Major
Found in packages/casl-prisma/src/prisma/PrismaQueryParser.ts and 1 other location - About 1 hr to fix
packages/casl-prisma/src/prisma/PrismaQueryParser.ts on lines 44..51

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 69.

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 3 locations. Consider refactoring.
Open

const istartsWith: StringInterpreter = (condition, object, { get }) => {
  return get(object, condition.field).toLowerCase().startsWith(condition.value.toLowerCase());
};
Severity: Major
Found in packages/casl-prisma/src/prisma/interpretPrismaQuery.ts and 2 other locations - About 1 hr to fix
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 28..30
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 35..37

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 3 locations. Consider refactoring.
Open

const icontains: StringInterpreter = (condition, object, { get }) => {
  return get(object, condition.field).toLowerCase().includes(condition.value.toLowerCase());
};
Severity: Major
Found in packages/casl-prisma/src/prisma/interpretPrismaQuery.ts and 2 other locations - About 1 hr to fix
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 21..23
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 28..30

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 3 locations. Consider refactoring.
Open

const iendsWith: StringInterpreter = (condition, object, { get }) => {
  return get(object, condition.field).toLowerCase().endsWith(condition.value.toLowerCase());
};
Severity: Major
Found in packages/casl-prisma/src/prisma/interpretPrismaQuery.ts and 2 other locations - About 1 hr to fix
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 21..23
packages/casl-prisma/src/prisma/interpretPrismaQuery.ts on lines 35..37

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

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

export function rulesToFields<T extends PureAbility<any, AnyObject>>(
  ability: T,
  action: Parameters<T['rulesFor']>[0],
  subjectType: ExtractSubjectType<Parameters<T['rulesFor']>[1]>,
): AnyObject {
Severity: Major
Found in packages/casl-ability/src/extra/rulesToFields.ts and 1 other location - About 1 hr to fix
packages/casl-ability/src/extra/rulesToQuery.ts on lines 49..69

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 64.

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

export function rulesToAST<T extends AnyAbility>(
  ability: T,
  action: Parameters<T['rulesFor']>[0],
  subjectType: ExtractSubjectType<Parameters<T['rulesFor']>[1]>,
): Condition | null {
Severity: Major
Found in packages/casl-ability/src/extra/rulesToQuery.ts and 1 other location - About 1 hr to fix
packages/casl-ability/src/extra/rulesToFields.ts on lines 8..29

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 64.

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

export function rulesToQuery<T extends AnyAbility, R = object>(
  ability: T,
  action: Parameters<T['rulesFor']>[0],
  subjectType: ExtractSubjectType<Parameters<T['rulesFor']>[1]>,
  convert: RuleToQueryConverter<T, R>
Severity: Minor
Found in packages/casl-ability/src/extra/rulesToQuery.ts - 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

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

interface BoundCanExtraProps<T extends AnyAbility> extends ExtraProps {
  ability?: T
  children: ReactNode | ((isAllowed: boolean, ability: T) => ReactNode)
}
Severity: Major
Found in packages/casl-react/src/Can.ts and 1 other location - About 1 hr to fix
packages/casl-react/src/Can.ts on lines 29..32

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

interface CanExtraProps<T extends AnyAbility> extends ExtraProps {
  ability: T
  children: ReactNode | ((isAllowed: boolean, ability: T) => ReactNode)
}
Severity: Major
Found in packages/casl-react/src/Can.ts and 1 other location - About 1 hr to fix
packages/casl-react/src/Can.ts on lines 34..37

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

Function run has 26 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function run(name, args) {
  if (!name || !(name in COMMANDS)) {
    printHelp();
    return;
  }
Severity: Minor
Found in packages/dx/lib/dx.js - About 1 hr to fix
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