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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.builder.dexing
import com.android.SdkConstants
import com.android.utils.PathUtils.toSystemIndependentPath
import java.io.File
import java.nio.file.Files
import java.nio.file.Path
import java.util.SortedMap
import java.util.zip.ZipFile
import java.util.zip.ZipInputStream
import kotlin.streams.toList
/**
* Returns `true` if the given file's extension is `.jar`, ignoring case. It may or may not exist.
*/
val isJarFile: (File) -> Boolean = { it.path.endsWith(SdkConstants.DOT_JAR, ignoreCase = true) }
/**
* Returns a sorted list of files in the given directory whose relative paths satisfy the given
* filter.
*/
fun getSortedFilesInDir(
dir: Path,
filter: (relativePath: String) -> Boolean = { true }
): List<Path> {
return Files.walk(dir).use { files ->
files
.filter { file -> filter(dir.relativize(file).toString()) }
.toList()
.sortedWith(
Comparator { left, right ->
// Normalize the paths to ensure consistent order across file systems
// (see commit e177f16268680ab2de45bbf6dddd3fe02d89436b).
val systemIndependentLeft = toSystemIndependentPath(left)
val systemIndependentRight = toSystemIndependentPath(right)
systemIndependentLeft.compareTo(systemIndependentRight)
}
)
}
}
/**
* Returns a sorted list of the relative paths of the entries in the given jar where the relative
* paths satisfy the given filter.
*/
fun getSortedRelativePathsInJar(
jar: File,
filter: (relativePath: String) -> Boolean = { true }
): List<String> {
// Zip buffered inputstream is more memory efficient than using ZipFile.entries.
ZipInputStream(jar.inputStream().buffered()).use { stream ->
val relativePaths = mutableListOf<String>()
while (true) {
val entry = stream.nextEntry ?: break
if (filter(entry.name)) {
relativePaths.add(entry.name)
}
}
return relativePaths.sorted()
}
}
/**
* Returns a sorted map of the entries in the given jar whose relative paths satisfy the given
* filter. Each entry in the map maps the relative path of a jar entry to its byte contents.
*
* The given jar must not have duplicate entries.
*/
fun getSortedRelativePathsInJarWithContents(
jar: File,
filter: (relativePath: String) -> Boolean = { true }
): SortedMap<String, ByteArray> {
return ZipFile(jar).use { zipFile ->
zipFile.entries()
.toList()
.filter { entry -> filter(entry.name) }
.map { entry ->
entry.name to zipFile.getInputStream(entry).buffered().use { stream ->
stream.readBytes()
}
}.toMap()
.toSortedMap()
}
}
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