DataBindingExcludeGeneratedTask.java revision 08119ea342cb47910ca80ff646d746f00e4663ce 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.databinding.tool;
18
19import com.google.common.base.Preconditions;
20
21import org.apache.commons.io.FileUtils;
22import org.apache.commons.io.IOUtils;
23import org.gradle.api.DefaultTask;
24import org.gradle.api.tasks.Input;
25import org.gradle.api.tasks.TaskAction;
26import org.gradle.api.tasks.bundling.Jar;
27
28import android.databinding.tool.processing.Scope;
29import android.databinding.tool.util.L;
30
31import java.io.File;
32import java.io.FileInputStream;
33import java.io.FileNotFoundException;
34import java.io.IOException;
35import java.util.List;
36
37/**
38 * Task to exclude generated classes from the Jar task of a library project
39 */
40public class DataBindingExcludeGeneratedTask extends DefaultTask {
41    private String appPackage;
42    private String infoClassQualifiedName;
43    @Input
44    private File generatedClassListFile;
45    private boolean isLibrary;
46
47    private org.gradle.api.tasks.bundling.Jar packageTask;
48    private final String EXCLUDE_PATTERN = "android/databinding/layouts/*.*";
49
50    public void setAppPackage(String appPackage) {
51        this.appPackage = appPackage;
52    }
53
54    public void setInfoClassQualifiedName(String infoClassQualifiedName) {
55        this.infoClassQualifiedName = infoClassQualifiedName;
56    }
57
58    public void setLibrary(boolean isLibrary) {
59        this.isLibrary = isLibrary;
60    }
61
62    public void setPackageTask(Jar packageTask) {
63        this.packageTask = packageTask;
64    }
65
66    public void setGeneratedClassListFile(File generatedClassListFile) {
67        this.generatedClassListFile = generatedClassListFile;
68    }
69
70    public String getAppPackage() {
71        return appPackage;
72    }
73
74    public String getInfoClassQualifiedName() {
75        return infoClassQualifiedName;
76    }
77
78    public File getGeneratedClassListFile() {
79        return generatedClassListFile;
80    }
81
82    @TaskAction
83    public void excludeGenerated() {
84        L.d("Excluding generated classes from jar. Is library ? %s", isLibrary);
85        String appPkgAsClass = appPackage.replace('.', '/');
86        String infoClassAsClass = infoClassQualifiedName.replace('.', '/');
87        exclude(infoClassAsClass + ".class");
88        exclude(EXCLUDE_PATTERN);
89        if (isLibrary) {
90            exclude(appPkgAsClass + "/BR.*");
91            List<String> generatedClasses = readGeneratedClasses();
92            for (String klass : generatedClasses) {
93                exclude(klass.replace('.', '/') + ".class");
94            }
95        }
96        Scope.assertNoError();
97        L.d("Excluding generated classes from library jar is done.");
98    }
99
100    private void exclude(String pattern) {
101        L.d("exclude %s", pattern);
102        packageTask.exclude(pattern);
103    }
104
105    private List<String> readGeneratedClasses() {
106        Preconditions.checkNotNull(generatedClassListFile, "Data binding exclude generated task"
107                + " is not configured properly");
108        Preconditions.checkArgument(generatedClassListFile.exists(),
109                "Generated class list does not exist %s", generatedClassListFile.getAbsolutePath());
110        FileInputStream fis = null;
111        try {
112            fis = new FileInputStream(generatedClassListFile);
113            return IOUtils.readLines(fis);
114        } catch (FileNotFoundException e) {
115            L.e(e, "Unable to read generated class list from %s",
116                    generatedClassListFile.getAbsoluteFile());
117        } catch (IOException e) {
118            L.e(e, "Unexpected exception while reading %s",
119                    generatedClassListFile.getAbsoluteFile());
120        } finally {
121            IOUtils.closeQuietly(fis);
122        }
123        Preconditions.checkState(false, "Could not read data binding generated class list");
124        return null;
125    }
126}
127