Reporting System

/**
 * Reporter function interface for formatting JSHint output
 * @param results - Array of linting result objects containing file and error info
 * @param data - Array of detailed analysis data objects from JSHINT.data()
 * @param opts - Reporter options object (verbose, filename, etc.)
 */
function reporter(results, data, opts) {
  // results: Array of result objects
  // data: Array of JSHINT.data() objects  
  // opts: Reporter options object
}

// Result Object Structure
{
  file: string,          // File path
  error: {               // Error details
    line: number,        // Line number
    character: number,   // Character position
    reason: string,      // Error message
    code: string,        // Error code
    evidence: string     // Source code line (optional)
  }
}

// Data Object Structure (from JSHINT.data())
{
  functions: Array,      // Function analysis data
  options: Object,       // Options used
  errors: Array,         // Error objects
  implieds: Array,       // Implied globals
  globals: Array,        // Used/defined globals
  unused: Array,         // Unused variables
  member: Object,        // Member usage data
  json: boolean         // JSON mode flag
}

// Options Object Structure
{
  verbose: boolean,      // Show error codes
  filename: string       // Filename for stdin input
}

// Custom reporter implementation
const myReporter = {
  reporter: function(results, data, opts) {
    // Process results
    results.forEach(result => {
      if (result.error) {
        console.log(`Error in ${result.file}:`);
        console.log(`  Line ${result.error.line}: ${result.error.reason}`);
        if (opts.verbose) {
          console.log(`  Code: ${result.error.code}`);
        }
      }
    });
    
    // Process additional data if needed
    data.forEach(fileData => {
      if (fileData.unused && fileData.unused.length > 0) {
        console.log('Unused variables:', fileData.unused);
      }
    });
  }
};

// Use with CLI
// jshint --reporter ./my-reporter.js file.js

/**
 * Default reporter - Human-readable format with colors
 * Located at: src/reporters/default.js
 */
interface DefaultReporter {
  reporter(results, data, opts): void;
}

/**
 * Unix reporter - Standard unix tool output format
 * Format: filename:line:column: message
 * Located at: src/reporters/unix.js
 */
interface UnixReporter {
  reporter(results, data, opts): void;
}

/**
 * Checkstyle reporter - XML format for CI tools
 * Located at: src/reporters/checkstyle.js
 */
interface CheckstyleReporter {
  reporter(results, data, opts): void;
}

/**
 * JSLint XML reporter - JSLint-compatible XML output
 * Located at: src/reporters/jslint_xml.js
 */
interface JSLintXMLReporter {
  reporter(results, data, opts): void;
}

/**
 * Non-error reporter - Shows additional JSHint data beyond errors
 * Located at: src/reporters/non_error.js
 */
interface NonErrorReporter {
  reporter(results, data, opts): void;
}

# Default reporter (human-readable)
jshint app.js

# Unix format (great for grep, editors)
jshint --reporter unix app.js

# XML format for CI systems
jshint --reporter checkstyle app.js > checkstyle.xml

# JSLint-compatible XML
jshint --reporter jslint_xml app.js

# Show additional analysis data
jshint --show-non-errors app.js

app.js: line 12, col 25, Missing semicolon. (W033)
app.js: line 15, col 10, 'unusedVar' is defined but never used. (W098)

2 errors

jshint --verbose app.js

app.js: line 12, col 25, Missing semicolon. (W033)
app.js: line 15, col 10, 'unusedVar' is defined but never used. (W098)

2 errors

app.js:12:25: Missing semicolon.
app.js:15:10: 'unusedVar' is defined but never used.

# Vim quickfix
jshint --reporter unix *.js | vim -q -

# Emacs compilation mode
jshint --reporter unix src/

<?xml version="1.0" encoding="utf-8"?>
<checkstyle version="4.3">
  <file name="app.js">
    <error line="12" column="25" severity="error" message="Missing semicolon." source="jshint.W033" />
    <error line="15" column="10" severity="error" message="'unusedVar' is defined but never used." source="jshint.W098" />
  </file>
</checkstyle>

# Jenkins with Checkstyle plugin
jshint --reporter checkstyle src/ > checkstyle-jshint.xml

# SonarQube integration
jshint --reporter checkstyle --config .jshintrc src/ > jshint-report.xml

<?xml version="1.0" encoding="UTF-8" ?>
<jslint>
  <file name="app.js">
    <issue line="12" char="25" reason="Missing semicolon." evidence="    var x = 1" />
    <issue line="15" char="10" reason="'unusedVar' is defined but never used." evidence="    var unusedVar = 42;" />
  </file>
</jslint>

app.js:
  Functions: 3
  Globals: console, require, module
  Unused variables: unusedVar (Line 15)
  Implied globals: (none)

jshint --show-non-errors app.js

/**
 * Custom reporter template
 * Export an object with a reporter function
 */
interface CustomReporter {
  reporter(results, data, opts): void;
}

// json-reporter.js
module.exports = {
  reporter: function(results, data, opts) {
    const output = {
      timestamp: new Date().toISOString(),
      files: results.reduce((acc, result) => {
        if (!acc[result.file]) {
          acc[result.file] = {
            errors: [],
            warnings: []
          };
        }
        
        if (result.error) {
          const error = {
            line: result.error.line,
            column: result.error.character,
            message: result.error.reason,
            code: result.error.code,
            severity: result.error.code.startsWith('E') ? 'error' : 'warning'
          };
          
          if (error.severity === 'error') {
            acc[result.file].errors.push(error);
          } else {
            acc[result.file].warnings.push(error);
          }
        }
        
        return acc;
      }, {}),
      summary: {
        totalFiles: Object.keys(results.reduce((acc, r) => {
          acc[r.file] = true;
          return acc;
        }, {})).length,
        totalErrors: results.filter(r => r.error && r.error.code.startsWith('E')).length,
        totalWarnings: results.filter(r => r.error && r.error.code.startsWith('W')).length
      }
    };
    
    console.log(JSON.stringify(output, null, 2));
  }
};

jshint --reporter ./json-reporter.js src/ > report.json

// slack-reporter.js
const https = require('https');

module.exports = {
  reporter: function(results, data, opts) {
    const errors = results.filter(r => r.error);
    
    if (errors.length === 0) {
      return; // No errors to report
    }
    
    const message = {
      text: `JSHint found ${errors.length} issues`,
      attachments: errors.slice(0, 10).map(result => ({
        color: result.error.code.startsWith('E') ? 'danger' : 'warning',
        fields: [
          {
            title: 'File',
            value: result.file,
            short: true
          },
          {
            title: 'Line',
            value: result.error.line,
            short: true
          },
          {
            title: 'Message',
            value: result.error.reason,
            short: false
          }
        ]
      }))
    };
    
    // Send to Slack webhook (URL from environment)
    const webhookUrl = process.env.SLACK_WEBHOOK_URL;
    if (webhookUrl) {
      // Implementation for posting to Slack webhook
      console.log('Posting to Slack:', JSON.stringify(message, null, 2));
    } else {
      console.log('SLACK_WEBHOOK_URL not set');
    }
  }
};

interface ReporterOptions {
  /**
   * Show error codes in output
   */
  verbose: boolean;
  
  /**
   * Filename to use for stdin input
   */
  filename?: string;
  
  /**
   * Show additional JSHint data beyond errors
   */
  'show-non-errors': boolean;
  
  /**
   * Custom options specific to reporter implementation
   */
  [key: string]: any;
}

- name: Run JSHint
  run: |
    jshint --reporter checkstyle src/ > jshint-report.xml
    
- name: Publish JSHint Results
  uses: dorny/test-reporter@v1
  if: always()
  with:
    name: JSHint Results
    path: jshint-report.xml
    reporter: java-junit

// webpack.config.js
const jshint = require('jshint').JSHINT;

class JSHintPlugin {
  apply(compiler) {
    compiler.hooks.emit.tap('JSHintPlugin', (compilation) => {
      // Custom reporter for webpack builds
      const reporter = {
        reporter: function(results) {
          results.forEach(result => {
            if (result.error) {
              const message = `${result.file}:${result.error.line}:${result.error.character} ${result.error.reason}`;
              compilation.warnings.push(new Error(message));
            }
          });
        }
      };
      
      // Use reporter with JSHint
    });
  }
}

const gulp = require('gulp');
const jshint = require('gulp-jshint');

gulp.task('lint', function() {
  return gulp.src('src/**/*.js')
    .pipe(jshint())
    .pipe(jshint.reporter('unix'))
    .pipe(jshint.reporter('fail')); // Fail build on errors
});