Disable the standard:filename rule whenever Ktlint CLI is run with option `--stdin

CHANGELOG.md

@@ -11,6 +11,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Fixed
 
 * An enumeration class having a primary constructor and in which the list of enum entries is followed by a semicolon then do not remove the semicolon in case it is followed by code element `no-semi` ([#1733](https://github.com/pinterest/ktlint/issues/1733))
+* Disable the `standard:filename` rule whenever Ktlint CLI is run with option `--stdin` ([#1742](https://github.com/pinterest/ktlint/issues/1742))
 
 ### Changed
 

ktlint/src/main/kotlin/com/pinterest/ktlint/internal/KtlintCommandLine.kt

@@ -261,6 +261,8 @@ internal class KtlintCommandLine {
                     plus(*disabledRulesEditorConfigOverrides())
                 }.applyIf(android) {
                     plus(CODE_STYLE_PROPERTY to CodeStyleValue.android)
+                }.applyIf(stdin) {
+                    plus(createRuleExecutionEditorConfigProperty("standard:filename") to RuleExecution.disabled)
                 }
 
     private fun disabledRulesEditorConfigOverrides() =

ktlint/src/test/kotlin/com/pinterest/ktlint/SimpleCLITest.kt

@@ -2,6 +2,7 @@ package com.pinterest.ktlint
 
 import java.io.ByteArrayInputStream
 import java.nio.file.Path
+import org.assertj.core.api.Assertions.assertThat
 import org.assertj.core.api.SoftAssertions
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.io.TempDir
@@ -168,4 +169,19 @@ class SimpleCLITest {
                 }.assertAll()
             }
     }
+
+    @Test
+    fun `Issue 1742 - Disable the filename rule when --stdin is used`(
+        @TempDir
+        tempDir: Path,
+    ) {
+        CommandLineTestRunner(tempDir)
+            .run(
+                testProjectName = "too-many-empty-lines",
+                arguments = listOf("--stdin"),
+                stdin = ByteArrayInputStream("fun foo() = 42".toByteArray()),
+            ) {
+                assertThat(normalOutput).containsLineMatching(Regex(".*ktlint_standard_filename: disabled.*"))
+            }
+    }
 }