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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.android;
import com.google.common.collect.Multimap;
import com.google.devtools.build.android.ZipFilterAction.HashMismatchCheckMode;
import com.google.devtools.build.singlejar.ZipEntryFilter;
import java.io.IOException;
import java.util.Map;
/**
* A {@link ZipEntryFilter} for use with {@link ZipFilterAction}. Filters out entries that match the
* provided regular expression or are in the list to omit.
*/
class ZipFilterEntryFilter implements ZipEntryFilter {
private final String explicitFilter;
private final Multimap<String, Long> entriesToOmit;
private final Map<String, Long> inputEntries;
private final HashMismatchCheckMode hashMismatchCheckMode;
private boolean sawErrors = false;
public boolean sawErrors() {
return sawErrors;
}
/**
* Creates a new filter.
*
* @param explicitFilter a regular expression to match against entry filenames
* @param entriesToOmit a map of filename and CRC-32 of entries to omit
* @param inputEntries a map of filename and CRC-32 of entries in the input Zip file
* @param hashMismatchCheckMode ignore, warn or error out for content hash mismatches.
*/
public ZipFilterEntryFilter(
String explicitFilter,
Multimap<String, Long> entriesToOmit,
Map<String, Long> inputEntries,
HashMismatchCheckMode hashMismatchCheckMode) {
this.explicitFilter = explicitFilter;
this.entriesToOmit = entriesToOmit;
this.inputEntries = inputEntries;
this.hashMismatchCheckMode = hashMismatchCheckMode;
}
@Override
public void accept(String filename, StrategyCallback callback) throws IOException {
if (filename.matches(explicitFilter)) {
callback.skip();
} else if (entriesToOmit.containsKey(filename)) {
if (hashMismatchCheckMode == HashMismatchCheckMode.IGNORE) {
callback.skip();
} else {
Long entryCrc = inputEntries.get(filename);
if (entriesToOmit.containsEntry(filename, entryCrc)) {
callback.skip();
} else {
if (hashMismatchCheckMode == HashMismatchCheckMode.ERROR) {
System.out.printf(
"\u001b[31mERROR:\u001b[0m Requested to filter entries of name "
+ "'%s'; name matches but the hash does not.\n",
filename);
sawErrors = true;
callback.skip();
} else {
System.out.printf(
"\u001b[35mWARNING:\u001b[0m Requested to filter entries of name "
+ "'%s'; name matches but the hash does not. Copying anyway.\n",
filename);
callback.copy(null);
}
}
}
} else {
callback.copy(null);
}
}
}
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