Fix traversing the directory hierarchy on WindowsOS / Ant-style path …

…matching

Globs always use a "/" as directory separator on all OS's. Input patterns containing
a "\" on Windows OS are transformed to "/" as users on Windows more likely would
assume that the "\" may be used.

On WindowsOS, transform "\" in the filepath to "/" before comparing the filename with
the regular expression (of the glob) which always uses "/" as separator.

Refactor all logic which create globs based on an input path.
- If a path (absolute or relative) point to a directory, that path is expanded
  to the default globs (*.kt, *.kts) in that specific directory or any of its
  subdirectories.
- If a path (absolute or relative) does not point to a directory, e.g. it
  points to a file, or it is a pattern. See "**" replacement below.
- On Windows OS patters containing a "*" (or "**") can not be resolved with
  default Paths utilities. In such case the given input pattern is handled as
  is. See "**" replacement below.

Patterns that contain one or more occurrence of a "**" are split into multiple
patterns so that files on that specific path and subdirectories will be matched.
 - For example, for path "some/path/**/*.kt" an additional pattern
   "some/path/*.kt" is generated to make sure that not only the "*.kt" files in
   a subdirectory of "some/path/" are found but also the "*.kt" in directory
   "some/path" as well. This is in sync with the "**" notation in a glob which
   should be interpreted as having zero or more intermediate subdirectories.
 - For example, for path "some/**/path/**/*.kt", multiple additional patterns
   are generated. As it contains two "**" patterns, 2 x 2 patterns are needed
   to match all possible combinations:
   - "some/**/path/**/*.kt"
   - "some/**/path/*.kt"
   - "some/path/**/*.kt"
   - "some/path/*.kt"

Finally, on Windows OS more fixes are needed as the resulting globs may not
contain any drive destinations as the start of the path. Such a drive
destination is replaced with a "**". So "D:/some/path/*.kt" becomes
"/some/path/*.kt". Note that the last glob representation is less strict than
the original pattern as it could match on other drives that "D:/" as well.

Extend trace logging.

Closes pinterest#1600
Closes pinterest#1601

CHANGELOG.md

@@ -6,6 +6,9 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Fixed
 
+* Traversing directory hierarchy at Windows ([#1600](https://github.com/pinterest/ktlint/issues/1600))
+* Ant-style path pattern support ([#1601](https://github.com/pinterest/ktlint/issues/1601))
+
 ### Added
 
 ### Changed

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

@@ -1,13 +1,11 @@
 package com.pinterest.ktlint.internal
 
-import ch.qos.logback.classic.Level
 import com.pinterest.ktlint.core.KtLint
 import com.pinterest.ktlint.core.LintError
 import com.pinterest.ktlint.core.RuleProvider
 import com.pinterest.ktlint.core.api.EditorConfigDefaults
 import com.pinterest.ktlint.core.api.EditorConfigOverride
 import com.pinterest.ktlint.core.initKtLintKLogger
-import com.pinterest.ktlint.core.setDefaultLoggerModifier
 import java.io.File
 import java.nio.file.FileSystem
 import java.nio.file.FileVisitResult
@@ -26,7 +24,6 @@ import mu.KotlinLogging
 import org.jetbrains.kotlin.util.prefixIfNot
 
 private val logger = KotlinLogging.logger {}.initKtLintKLogger()
-    .setDefaultLoggerModifier { Level.TRACE } // TODO: remove
 
 internal val workDir: String = File(".").canonicalPath
 
@@ -145,7 +142,7 @@ internal fun FileSystem.fileSequence(
     return result.asSequence()
 }
 
-internal fun FileSystem.expand(
+private fun FileSystem.expand(
     patterns: List<String>,
     rootDir: Path,
 ) =