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kotlin.script.experimental.jvm.util.jvmClassLoaderUtil.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package kotlin.script.experimental.jvm.util
import java.io.File
import java.io.FileInputStream
import java.io.IOException
import java.io.InputStream
import java.net.JarURLConnection
import java.net.URL
import java.util.jar.JarFile
import java.util.jar.JarInputStream
import kotlin.script.experimental.jvm.impl.toFileOrNull
fun ClassLoader.forAllMatchingFiles(namePattern: String, body: (String, InputStream) -> Unit) {
val processedDirs = HashSet()
val processedJars = HashSet()
val nameRegex = namePatternToRegex(namePattern)
fun iterateResources(vararg keyResourcePaths: String) {
for (keyResourcePath in keyResourcePaths) {
val resourceRootCalc = ClassLoaderResourceRootFIlePathCalculator(keyResourcePath)
for (url in getResources(keyResourcePath)) {
if (url.protocol == "jar") {
val jarConnection = url.openConnection() as? JarURLConnection
val jarUrl = jarConnection?.jarFileURL
if (jarUrl != null && !processedJars.contains(jarUrl)) {
processedJars.add(jarUrl)
try {
jarConnection.jarFile
} catch (_: IOException) {
// TODO: consider error reporting
null
}?.let {
forAllMatchingFilesInJarFile(it, nameRegex, body)
}
}
} else {
val rootDir = url.toFileOrNull()?.let { resourceRootCalc(it) }
if (rootDir != null && rootDir.isDirectory && !processedDirs.contains(rootDir)) {
processedDirs.add(rootDir)
forAllMatchingFilesInDirectory(rootDir, namePattern, body)
}
}
}
}
}
iterateResources("", JAR_MANIFEST_RESOURCE_NAME)
}
internal val wildcardChars = "*?".toCharArray()
internal val patternCharsToEscape = ".*?+()[]^\${}|".toCharArray().also { assert(wildcardChars.all { wc -> it.contains(wc) }) }
private fun Char.escape(): String = (if (this == '\\' || patternCharsToEscape.contains(this)) "\\" else "") + this
internal val pathSeparatorChars = "/".let { if (File.separatorChar == '/') it else it + File.separator }.toCharArray()
internal val pathElementPattern = if (File.separatorChar == '/') "[^/]*" else "[^/${File.separatorChar.escape()}]*"
internal val pathSeparatorPattern = if (File.separatorChar == '/') "/" else "[/${File.separatorChar.escape()}]."
internal val specialPatternChars = patternCharsToEscape + pathSeparatorChars
private fun String.toUniversalSeparator(): String = if (File.separatorChar == '/') this else replace(File.separatorChar, '/')
internal fun forAllMatchingFilesInDirectory(baseDir: File, namePattern: String, body: (String, InputStream) -> Unit) {
val patternStart = namePattern.indexOfAny(wildcardChars)
if (patternStart < 0) {
// assuming a single file
baseDir.resolve(namePattern).takeIf { it.exists() && it.isFile }?.let { file ->
body(file.relativeToOrSelf(baseDir).path.toUniversalSeparator(), file.inputStream())
}
} else {
val patternDirStart = namePattern.lastIndexOfAny(pathSeparatorChars, patternStart)
val root = if (patternDirStart <= 0) baseDir else baseDir.resolve(namePattern.substring(0, patternDirStart))
if (root.exists() && root.isDirectory) {
val re = namePatternToRegex(namePattern.substring(patternDirStart + 1))
root.walkTopDown().filter {
re.matches(it.relativeToOrSelf(root).path)
}.forEach { file ->
body(file.relativeToOrSelf(baseDir).path.toUniversalSeparator(), file.inputStream())
}
}
}
}
internal fun forAllMatchingFilesInJarStream(jarInputStream: JarInputStream, nameRegex: Regex, body: (String, InputStream) -> Unit) {
do {
val entry = jarInputStream.nextJarEntry
if (entry != null) {
try {
if (!entry.isDirectory && nameRegex.matches(entry.name)) {
body(entry.name, jarInputStream)
}
} finally {
jarInputStream.closeEntry()
}
}
} while (entry != null)
}
internal fun forAllMatchingFilesInJar(jarFile: File, nameRegex: Regex, body: (String, InputStream) -> Unit) {
JarInputStream(FileInputStream(jarFile)).use {
forAllMatchingFilesInJarStream(it, nameRegex, body)
}
}
internal fun forAllMatchingFilesInJarFile(jarFile: JarFile, nameRegex: Regex, body: (String, InputStream) -> Unit) {
jarFile.entries().asSequence().forEach { entry ->
if (!entry.isDirectory && nameRegex.matches(entry.name)) {
jarFile.getInputStream(entry).use { stream ->
body(entry.name, stream)
}
}
}
}
internal fun namePatternToRegex(pattern: String): Regex = Regex(
buildString {
var current = 0
loop@ while (current < pattern.length) {
val nextIndex = pattern.indexOfAny(specialPatternChars, current)
val next = if (nextIndex < 0) pattern.length else nextIndex
append(pattern.substring(current, next))
current = next + 1
when {
next >= pattern.length -> break@loop
pathSeparatorChars.contains(pattern[next]) -> append(pathSeparatorPattern)
pattern[next] == '?' -> append('.')
pattern[next] == '*' && next + 1 < pattern.length && pattern[next + 1] == '*' -> {
append(".*")
current++
}
pattern[next] == '*' -> append(pathElementPattern)
else -> {
append('\\')
append(pattern[next])
}
}
}
}
)