fix: add helper method to check for CLI commands

src/helpers/wasOptionPassed.ts

@@ -0,0 +1,8 @@
+// Helper function to determine if an option was passed via CLI
+export function wasOptionPassed(option: string) {
+  // Regular expression to match the exact option with any value
+  const regex = new RegExp(`--${option}(?:=[^\\s]*)?$`)
+
+  // eslint-disable-next-line node/prefer-global/process
+  return process.argv.some(arg => regex.test(arg))
+}

src/index.ts

@@ -10,6 +10,7 @@ import { validateOption } from './helpers/validateOption'
 import getProjectRoot from './helpers/getProjectRoot'
 import coerceRules from './helpers/coerceRules'
 import { FLAT_RULESETS_RULES } from './helpers/constants'
+import { wasOptionPassed } from './helpers/wasOptionPassed'
 
 const projectRoot = await getProjectRoot()
 if (!projectRoot) {
@@ -44,6 +45,10 @@ catch {
   output.push({ info: `👉 Using default configuration` })
 }
 
+// Check if `apply` or `ignore` options were explicitly passed
+const applyFromCLI = wasOptionPassed('apply')
+const ignoreFromCLI = wasOptionPassed('ignore')
+
 // eslint-disable-next-line ts/no-unused-expressions, node/prefer-global/process
 yargs(hideBin(process.argv))
   .command(
@@ -108,6 +113,16 @@ yargs(hideBin(process.argv))
           default: config.output,
           group: 'Output Format:',
         })
+        .check(() => {
+          // Only check for conflict if both apply and ignore are provided from CLI
+          if (applyFromCLI && ignoreFromCLI) {
+            console.error(`\n${BG_ERR}Cannot use both --ignore and --apply options together.${BG_RESET}\n`)
+            // eslint-disable-next-line node/prefer-global/process
+            process.exit(1)
+          }
+
+          return true
+        })
     },
     (argv) => {
       analyze({