Binary Tools

/**
 * Command-line utility for adding ESLint disable comments
 */
interface ESLintIgnoreErrors {
  /** Binary name in package.json */
  binary: 'eslint-ignore-errors';
  /** Entry point file */
  entryPoint: 'bin/eslint-ignore-errors.js';
  /** Command usage pattern */
  usage: 'eslint-ignore-errors <file.js>';
  /** Process ESLint JSON output and insert disable comments */
  functionality: 'ProcessESLintOutput';
}

# Add disable comments for all violations in a file
eslint-ignore-errors app/assets/javascripts/something.js

# Process multiple files
eslint-ignore-errors src/components/Button.js
eslint-ignore-errors src/utils/helpers.js

/**
 * Core functionality of eslint-ignore-errors
 */
interface IgnoreErrorsProcess {
  /** Execute ESLint on target file and get JSON output */
  executeESLint(filePath: string): Promise<ESLintResult[]>;
  
  /** Process ESLint results and group violations by line */
  groupViolationsByLine(results: ESLintResult[]): Record<number, string[]>;
  
  /** Insert disable comments into source code */
  insertDisableComments(
    filePath: string, 
    violationsByLine: Record<number, string[]>
  ): void;
  
  /** Check if a line already contains a disable comment */
  isDisableComment(line: string): boolean;
  
  /** Merge new rule IDs into existing disable comments */
  mergeDisableComment(existingComment: string, newRuleIds: string[]): string;
}

interface ESLintResult {
  filePath: string;
  messages: ESLintMessage[];
}

interface ESLintMessage {
  line: number;
  column: number;
  ruleId: string;
  message: string;
}

# Example workflow for introducing new rules
# 1. Run eslint to see violations
npx eslint src/legacy-code.js

# 2. Add disable comments for all current violations
eslint-ignore-errors src/legacy-code.js

# 3. The file now has disable comments like:
# /* eslint-disable-next-line github/no-blur, github/no-inner-html */
# element.innerHTML = content;
# element.blur();

/**
 * Comment generation and management logic
 */
interface CommentGeneration {
  /** Generate new disable comment for rule violations */
  generateDisableComment(ruleIds: string[], indentation: string): string;
  
  /** Detect existing disable comments */
  detectExistingComment(line: string): {
    isDisableComment: boolean;
    ruleIds: string[];
    commentFormat: string;
  };
  
  /** Merge multiple rule IDs into single comment */
  mergeRuleIds(existing: string[], newRules: string[]): string[];
  
  /** Preserve code indentation when inserting comments */
  preserveIndentation(sourceLine: string): string;
}

// Single rule violation
/* eslint-disable-next-line github/no-blur */
element.blur();

// Multiple rule violations on same line
/* eslint-disable-next-line github/no-blur, github/no-inner-html */
element.innerHTML = '<span>content</span>';
element.blur();

// Merging with existing comment
// Before: /* eslint-disable-next-line no-console */
// After: /* eslint-disable-next-line no-console, github/no-dataset */
console.log(element.dataset.userId);

/**
 * File processing workflow steps
 */
interface ProcessingWorkflow {
  /** Read original file content */
  readSourceFile(filePath: string): string[];
  
  /** Execute ESLint with JSON formatter */
  runESLintAnalysis(filePath: string): {
    stdout: string;
    results: ESLintResult[];
  };
  
  /** Group violations by line number for batch processing */
  organizeViolations(messages: ESLintMessage[]): Record<number, string[]>;
  
  /** Insert comments while preserving existing disable comments */
  processLineByLine(
    sourceLines: string[],
    violationMap: Record<number, string[]>
  ): string[];
  
  /** Write modified content back to file */
  writeModifiedFile(filePath: string, modifiedLines: string[]): void;
}

// Original code with violations
function problematicFunction() {
  element.blur();                    // Line 2: github/no-blur
  element.innerHTML = userContent;   // Line 3: github/no-inner-html
  users.forEach(u => process(u));    // Line 4: github/array-foreach
}

// After running eslint-ignore-errors
function problematicFunction() {
  /* eslint-disable-next-line github/no-blur */
  element.blur();                    
  /* eslint-disable-next-line github/no-inner-html */
  element.innerHTML = userContent;   
  /* eslint-disable-next-line github/array-foreach */
  users.forEach(u => process(u));    
}

/**
 * Error handling and edge case management
 */
interface ErrorHandling {
  /** Handle ESLint execution failures */
  handleESLintErrors(error: Error, filePath: string): void;
  
  /** Skip files that don't need processing */
  shouldSkipFile(results: ESLintResult[]): boolean;
  
  /** Handle file system permission errors */
  handleFileSystemErrors(error: NodeJS.ErrnoException, filePath: string): void;
  
  /** Validate file path exists and is readable */
  validateInputFile(filePath: string): boolean;
}

# File doesn't exist
eslint-ignore-errors nonexistent.js
# Tool will fail gracefully with error message

# File has no violations
eslint-ignore-errors clean-code.js
# Tool will skip processing (no changes made)

# File already has all disable comments
eslint-ignore-errors already-ignored.js
# Tool will detect existing comments and merge appropriately

interface BinaryToolOptions {
  /** Target file path for processing */
  filePath: string;
  /** ESLint configuration to use */
  eslintConfig?: string;
  /** Output verbosity level */
  verbose?: boolean;
}

interface CommentInsertionResult {
  /** Number of comments inserted */
  commentsAdded: number;
  /** Number of existing comments merged */
  commentsMerged: number;
  /** Lines that were modified */
  modifiedLines: number[];
  /** Any errors encountered */
  errors: string[];
}

interface DisableCommentFormat {
  /** Full comment text */
  commentText: string;
  /** List of rule IDs in comment */
  ruleIds: string[];
  /** Indentation level */
  indentation: string;
  /** Comment style (single-line, multi-line) */
  style: 'single' | 'multi';
}