/*
* Copyright 2016 the original author or authors.
*
* 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 org.gradle.plugins.ide.eclipse.model.internal;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import org.gradle.api.file.DirectoryTree;
import org.gradle.api.internal.DynamicObjectUtil;
import org.gradle.api.specs.Spec;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.util.PatternSet;
import org.gradle.internal.Cast;
import org.gradle.plugins.ide.eclipse.model.ClasspathEntry;
import org.gradle.plugins.ide.eclipse.model.EclipseClasspath;
import org.gradle.plugins.ide.eclipse.model.SourceFolder;
import org.gradle.util.CollectionUtils;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
public class SourceFoldersCreator {
public List<ClasspathEntry> createSourceFolders(final EclipseClasspath classpath) {
List<ClasspathEntry> entries = Lists.newArrayList();
Function<File, String> provideRelativePath = new Function<File, String>() {
@Override
public String apply(File input) {
return classpath.getProject().relativePath(input);
}
};
List<SourceFolder> regulars = getRegularSourceFolders(classpath.getSourceSets(), provideRelativePath);
List<SourceFolder> trimmedExternals = getExternalSourceFolders(classpath.getSourceSets(), provideRelativePath);
entries.addAll(regulars);
entries.addAll(trimmedExternals);
return entries;
}
/**
* paths that navigate higher than project dir are not allowed in eclipse .classpath
* regardless if they are absolute or relative
*
* @return source folders that live inside the project
*/
public List<SourceFolder> getRegularSourceFolders(Iterable<SourceSet> sourceSets, Function<File, String> provideRelativePath) {
List<SourceFolder> sourceFolders = projectRelativeFolders(sourceSets, provideRelativePath);
return CollectionUtils.filter(sourceFolders, new Spec<SourceFolder>() {
@Override
public boolean isSatisfiedBy(SourceFolder element) {
return !element.getPath().contains("..");
}
});
}
/**
* see {@link #getRegularSourceFolders}
*
* @return source folders that live outside of the project
*/
public List<SourceFolder> getExternalSourceFolders(Iterable<SourceSet> sourceSets, Function<File, String> provideRelativePath) {
List<SourceFolder> sourceFolders = projectRelativeFolders(sourceSets, provideRelativePath);
List<SourceFolder> externalSourceFolders = CollectionUtils.filter(sourceFolders, new Spec<SourceFolder>() {
@Override
public boolean isSatisfiedBy(SourceFolder element) {
return element.getPath().contains("..");
}
});
List<SourceFolder> regularSourceFolders = getRegularSourceFolders(sourceSets, provideRelativePath);
List<String> sources = Lists.newArrayList(Lists.transform(regularSourceFolders, new Function<SourceFolder, String>() {
@Override
public String apply(SourceFolder sourceFolder) {
return sourceFolder.getName();
}
}));
return trimAndDedup(externalSourceFolders, sources);
}
private List<SourceFolder> trimAndDedup(List<SourceFolder> externalSourceFolders, List<String> givenSources) {
// externals are mapped to linked resources so we just need a name of the resource, without full path
// non unique folder names are naively deduped by adding parent filename as a prefix till unique
// since this seems like a rare edge case this simple approach should be enough
List<SourceFolder> trimmedSourceFolders = Lists.newArrayList();
for (SourceFolder folder : externalSourceFolders) {
folder.trim();
File parentFile = folder.getDir().getParentFile();
while (givenSources.contains(folder.getName()) && parentFile != null) {
folder.trim(parentFile.getName());
parentFile = parentFile.getParentFile();
}
givenSources.add(folder.getName());
trimmedSourceFolders.add(folder);
}
return trimmedSourceFolders;
}
private List<SourceFolder> projectRelativeFolders(Iterable<SourceSet> sourceSets, Function<File, String> provideRelativePath) {
ArrayList<SourceFolder> entries = Lists.newArrayList();
List<SourceSet> sortedSourceSets = sortSourceSetsAsPerUsualConvention(sourceSets);
for (SourceSet sourceSet : sortedSourceSets) {
List<DirectoryTree> sortedSourceDirs = sortSourceDirsAsPerUsualConvention(sourceSet.getAllSource().getSrcDirTrees());
for (DirectoryTree tree : sortedSourceDirs) {
File dir = tree.getDir();
if (dir.isDirectory()) {
String relativePath = provideRelativePath.apply(dir);
SourceFolder folder = new SourceFolder(relativePath, null);
folder.setDir(dir);
folder.setName(dir.getName());
folder.setIncludes(getIncludesForTree(sourceSet, tree));
folder.setExcludes(getExcludesForTree(sourceSet, tree));
entries.add(folder);
}
}
}
return entries;
}
private List<String> getExcludesForTree(SourceSet sourceSet, DirectoryTree directoryTree) {
List<Set<String>> excludesByType = getFiltersForTreeGroupedByType(sourceSet, directoryTree, "excludes");
return CollectionUtils.intersection(excludesByType);
}
private List<String> getIncludesForTree(SourceSet sourceSet, DirectoryTree directoryTree) {
List<Set<String>> includesByType = getFiltersForTreeGroupedByType(sourceSet, directoryTree, "includes");
for (Set<String> it : includesByType) {
if (it.isEmpty()) {
return Collections.emptyList();
}
}
List<String> allIncludes = CollectionUtils.flattenCollections(String.class, includesByType);
return ImmutableSet.copyOf(allIncludes).asList();
}
private List<Set<String>> getFiltersForTreeGroupedByType(SourceSet sourceSet, DirectoryTree directoryTree, String filterOperation) {
// check for duplicate entries in java and resources
Set<File> javaSrcDirs = sourceSet.getAllJava().getSrcDirs();
Set<File> resSrcDirs = sourceSet.getResources().getSrcDirs();
List<File> srcDirs = CollectionUtils.intersection(Lists.newArrayList(javaSrcDirs, resSrcDirs));
if (!srcDirs.contains(directoryTree.getDir())) {
return Lists.<Set<String>>newArrayList(collectFilters(directoryTree.getPatterns(), filterOperation));
} else {
Set<String> resourcesFilter = collectFilters(sourceSet.getResources().getSrcDirTrees(), directoryTree.getDir(), filterOperation);
Set<String> sourceFilter = collectFilters(sourceSet.getAllJava().getSrcDirTrees(), directoryTree.getDir(), filterOperation);
return Lists.<Set<String>>newArrayList(resourcesFilter, sourceFilter);
}
}
private Set<String> collectFilters(Set<DirectoryTree> directoryTrees, File targetDir, String filterOperation) {
for (DirectoryTree directoryTree : directoryTrees) {
if (directoryTree.getDir().equals(targetDir)) {
PatternSet patterns = directoryTree.getPatterns();
return collectFilters(patterns, filterOperation);
}
}
return Collections.emptySet();
}
private Set<String> collectFilters(PatternSet patterns, String filterOperation) {
return Cast.<Set<String>>uncheckedCast(DynamicObjectUtil.asDynamicObject(patterns).getProperty(filterOperation));
}
private List<SourceSet> sortSourceSetsAsPerUsualConvention(Iterable<SourceSet> sourceSets) {
return CollectionUtils.sort(sourceSets, new Comparator<SourceSet>() {
@Override
public int compare(SourceSet left, SourceSet right) {
return toComparable(left).compareTo(toComparable(right));
}
});
}
private List<DirectoryTree> sortSourceDirsAsPerUsualConvention(Iterable<DirectoryTree> sourceDirs) {
return CollectionUtils.sort(sourceDirs, new Comparator<DirectoryTree>() {
@Override
public int compare(DirectoryTree left, DirectoryTree right) {
return toComparable(left).compareTo(toComparable(right));
}
});
}
private static Comparable toComparable(SourceSet sourceSet) {
String name = sourceSet.getName();
if (SourceSet.MAIN_SOURCE_SET_NAME.equals(name)) {
return 0;
} else if (SourceSet.TEST_SOURCE_SET_NAME.equals(name)) {
return 1;
} else {
return 2;
}
}
private static Comparable toComparable(DirectoryTree tree) {
String path = tree.getDir().getPath();
if (path.endsWith("java")) {
return 0;
} else if (path.endsWith("resources")) {
return 2;
} else {
return 1;
}
}
}