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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* https://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.apache.tools.ant.taskdefs.cvslib;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.AbstractCvsTask;
import org.apache.tools.ant.util.DOMElementWriter;
import org.apache.tools.ant.util.DOMUtils;
import org.apache.tools.ant.util.FileUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* Examines the output of cvs rdiff between two tags.
*
* It produces an XML output representing the list of changes.
*
* <!-- Root element -->
* <!ELEMENT tagdiff (entry+) >
* <!-- Start tag of the report -->
* <!ATTLIST tagdiff startTag NMTOKEN #IMPLIED >
* <!-- End tag of the report -->
* <!ATTLIST tagdiff endTag NMTOKEN #IMPLIED >
* <!-- Start date of the report -->
* <!ATTLIST tagdiff startDate NMTOKEN #IMPLIED >
* <!-- End date of the report -->
* <!ATTLIST tagdiff endDate NMTOKEN #IMPLIED >
*
* <!-- CVS tag entry -->
* <!ELEMENT entry (file) >
* <!-- File added, changed or removed -->
* <!ELEMENT file (name, revision?, prevrevision?) >
* <!-- Name of the file -->
* <!ELEMENT name (#PCDATA) >
* <!-- Revision number -->
* <!ELEMENT revision (#PCDATA) >
* <!-- Previous revision number -->
* <!ELEMENT prevrevision (#PCDATA) >
*
*
* @since Ant 1.5
* @ant.task name="cvstagdiff"
*/
public class CvsTagDiff extends AbstractCvsTask {
/**
* Used to create the temp file for cvs log
*/
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
/** stateless helper for writing the XML document */
private static final DOMElementWriter DOM_WRITER = new DOMElementWriter();
/**
* Token to identify the word file in the rdiff log
*/
static final String FILE_STRING = "File ";
/**
* Length of token to identify the word file in the rdiff log
*/
static final int FILE_STRING_LENGTH = FILE_STRING.length();
/**
* Token to identify the word file in the rdiff log
*/
static final String TO_STRING = " to ";
/**
* Token to identify a new file in the rdiff log
*/
static final String FILE_IS_NEW = " is new;";
/**
* Token to identify the revision
*/
static final String REVISION = "revision ";
/**
* Token to identify a modified file in the rdiff log
*/
static final String FILE_HAS_CHANGED = " changed from revision ";
/**
* Token to identify a removed file in the rdiff log
*/
static final String FILE_WAS_REMOVED = " is removed";
/**
* The cvs package/module to analyse
*/
private String mypackage;
/**
* The earliest tag from which diffs are to be included in the report.
*/
private String mystartTag;
/**
* The latest tag from which diffs are to be included in the report.
*/
private String myendTag;
/**
* The earliest date from which diffs are to be included in the report.
*/
private String mystartDate;
/**
* The latest date from which diffs are to be included in the report.
*/
private String myendDate;
/**
* The file in which to write the diff report.
*/
private File mydestfile;
/**
* Used to skip over removed files
*/
private boolean ignoreRemoved = false;
/**
* temporary list of package names.
*/
private List packageNames = new ArrayList<>();
/**
* temporary list of "File:" + package name + "/" for all packages.
*/
private String[] packageNamePrefixes = null;
/**
* temporary list of length values for prefixes.
*/
private int[] packageNamePrefixLengths = null;
/**
* The package/module to analyze.
* @param p the name of the package to analyse
*/
@Override
public void setPackage(String p) {
mypackage = p;
}
/**
* Set the start tag.
*
* @param s the start tag.
*/
public void setStartTag(String s) {
mystartTag = s;
}
/**
* Set the start date.
*
* @param s the start date.
*/
public void setStartDate(String s) {
mystartDate = s;
}
/**
* Set the end tag.
*
* @param s the end tag.
*/
public void setEndTag(String s) {
myendTag = s;
}
/**
* Set the end date.
*
* @param s the end date.
*/
public void setEndDate(String s) {
myendDate = s;
}
/**
* Set the output file for the diff.
*
* @param f the output file for the diff.
*/
public void setDestFile(File f) {
mydestfile = f;
}
/**
* Set the ignore removed indicator.
*
* @param b the ignore removed indicator.
*
* @since Ant 1.8.0
*/
public void setIgnoreRemoved(boolean b) {
ignoreRemoved = b;
}
/**
* Execute task.
*
* @exception BuildException if an error occurs
*/
@Override
public void execute() throws BuildException {
// validate the input parameters
validate();
// build the rdiff command
addCommandArgument("rdiff");
addCommandArgument("-s");
if (mystartTag != null) {
addCommandArgument("-r");
addCommandArgument(mystartTag);
} else {
addCommandArgument("-D");
addCommandArgument(mystartDate);
}
if (myendTag != null) {
addCommandArgument("-r");
addCommandArgument(myendTag);
} else {
addCommandArgument("-D");
addCommandArgument(myendDate);
}
// force command not to be null
setCommand("");
File tmpFile = null;
try {
handlePackageNames();
tmpFile = FILE_UTILS.createTempFile(getProject(), "cvstagdiff", ".log", null,
true, true);
setOutput(tmpFile);
// run the cvs command
super.execute();
// parse the rdiff
CvsTagEntry[] entries = parseRDiff(tmpFile);
// write the tag diff
writeTagDiff(entries);
} finally {
packageNamePrefixes = null;
packageNamePrefixLengths = null;
packageNames.clear();
if (tmpFile != null) {
tmpFile.delete();
}
}
}
/**
* Parse the tmpFile and return and array of CvsTagEntry to be
* written in the output.
*
* @param tmpFile the File containing the output of the cvs rdiff command
* @return the entries in the output
* @exception BuildException if an error occurs
*/
private CvsTagEntry[] parseRDiff(File tmpFile) throws BuildException {
// parse the output of the command
try (BufferedReader reader =
new BufferedReader(new FileReader(tmpFile))) {
// entries are of the form:
//CVS 1.11
// File module/filename is new; current revision 1.1
//CVS 1.11.9
// File module/filename is new; cvstag_2003_11_03_2 revision 1.1
// or
// File module/filename changed from revision 1.4 to 1.6
// or
// File module/filename is removed; not included in
// release tag SKINLF_12
//CVS 1.11.9
// File testantoine/antoine.bat is removed; TESTANTOINE_1 revision 1.1.1.1
//
// get rid of 'File module/"
List entries = new ArrayList<>();
String line = reader.readLine();
while (null != line) {
line = removePackageName(line, packageNamePrefixes,
packageNamePrefixLengths);
if (line != null) {
// use || in a perl like fashion
@SuppressWarnings("unused")
boolean processed
= doFileIsNew(entries, line)
|| doFileHasChanged(entries, line)
|| doFileWasRemoved(entries, line);
}
line = reader.readLine();
}
return entries.toArray(new CvsTagEntry[0]);
} catch (IOException e) {
throw new BuildException("Error in parsing", e);
}
}
private boolean doFileIsNew(List entries, String line) {
int index = line.indexOf(FILE_IS_NEW);
if (index == -1) {
return false;
}
// it is a new file
// set the revision but not the prevrevision
String filename = line.substring(0, index);
String rev = null;
int indexrev = line.indexOf(REVISION, index);
if (indexrev != -1) {
rev = line.substring(indexrev + REVISION.length());
}
CvsTagEntry entry = new CvsTagEntry(filename, rev);
entries.add(entry);
log(entry.toString(), Project.MSG_VERBOSE);
return true;
}
private boolean doFileHasChanged(List entries, String line) {
int index = line.indexOf(FILE_HAS_CHANGED);
if (index == -1) {
return false;
}
// it is a modified file
// set the revision and the prevrevision
String filename = line.substring(0, index);
int revSeparator = line.indexOf(" to ", index);
String prevRevision =
line.substring(index + FILE_HAS_CHANGED.length(),
revSeparator);
String revision = line.substring(revSeparator + TO_STRING.length());
CvsTagEntry entry = new CvsTagEntry(filename,
revision,
prevRevision);
entries.add(entry);
log(entry.toString(), Project.MSG_VERBOSE);
return true;
}
private boolean doFileWasRemoved(List entries, String line) {
if (ignoreRemoved) {
return false;
}
int index = line.indexOf(FILE_WAS_REMOVED);
if (index == -1) {
return false;
}
// it is a removed file
String filename = line.substring(0, index);
String rev = null;
int indexrev = line.indexOf(REVISION, index);
if (indexrev != -1) {
rev = line.substring(indexrev + REVISION.length());
}
CvsTagEntry entry = new CvsTagEntry(filename, null, rev);
entries.add(entry);
log(entry.toString(), Project.MSG_VERBOSE);
return true;
}
/**
* Write the rdiff log.
*
* @param entries a CvsTagEntry[] value
* @exception BuildException if an error occurs
*/
private void writeTagDiff(CvsTagEntry[] entries) throws BuildException {
try (PrintWriter writer = new PrintWriter(new OutputStreamWriter(
Files.newOutputStream(mydestfile.toPath()), StandardCharsets.UTF_8))) {
writer.println("");
Document doc = DOMUtils.newDocument();
Element root = doc.createElement("tagdiff");
if (mystartTag != null) {
root.setAttribute("startTag", mystartTag);
} else {
root.setAttribute("startDate", mystartDate);
}
if (myendTag != null) {
root.setAttribute("endTag", myendTag);
} else {
root.setAttribute("endDate", myendDate);
}
root.setAttribute("cvsroot", getCvsRoot());
root.setAttribute("package",
String.join(",", packageNames));
DOM_WRITER.openElement(root, writer, 0, "\t");
writer.println();
for (CvsTagEntry entry : entries) {
writeTagEntry(doc, writer, entry);
}
DOM_WRITER.closeElement(root, writer, 0, "\t", true);
writer.flush();
if (writer.checkError()) {
throw new IOException("Encountered an error writing tagdiff");
}
} catch (UnsupportedEncodingException uee) {
log(uee.toString(), Project.MSG_ERR);
} catch (IOException ioe) {
throw new BuildException(ioe.toString(), ioe);
}
}
/**
* Write a single entry to the given writer.
*
* @param doc Document used to create elements.
* @param writer a PrintWriter value
* @param entry a CvsTagEntry value
*/
private void writeTagEntry(Document doc, PrintWriter writer,
CvsTagEntry entry)
throws IOException {
Element ent = doc.createElement("entry");
Element f = DOMUtils.createChildElement(ent, "file");
DOMUtils.appendCDATAElement(f, "name", entry.getFile());
if (entry.getRevision() != null) {
DOMUtils.appendTextElement(f, "revision", entry.getRevision());
}
if (entry.getPreviousRevision() != null) {
DOMUtils.appendTextElement(f, "prevrevision",
entry.getPreviousRevision());
}
DOM_WRITER.write(ent, writer, 1, "\t");
}
/**
* Validate the parameters specified for task.
*
* @exception BuildException if a parameter is not correctly set
*/
private void validate() throws BuildException {
if (null == mypackage && getModules().isEmpty()) {
throw new BuildException("Package/module must be set.");
}
if (null == mydestfile) {
throw new BuildException("Destfile must be set.");
}
if (null == mystartTag && null == mystartDate) {
throw new BuildException("Start tag or start date must be set.");
}
if (null != mystartTag && null != mystartDate) {
throw new BuildException(
"Only one of start tag and start date must be set.");
}
if (null == myendTag && null == myendDate) {
throw new BuildException("End tag or end date must be set.");
}
if (null != myendTag && null != myendDate) {
throw new BuildException(
"Only one of end tag and end date must be set.");
}
}
/**
* collects package names from the package attribute and nested
* module elements.
*/
private void handlePackageNames() {
if (mypackage != null) {
// support multiple packages
StringTokenizer myTokenizer = new StringTokenizer(mypackage);
while (myTokenizer.hasMoreTokens()) {
String pack = myTokenizer.nextToken();
packageNames.add(pack);
addCommandArgument(pack);
}
}
for (Module m : getModules()) {
packageNames.add(m.getName());
// will be added to command line in super.execute()
}
packageNamePrefixes = new String[packageNames.size()];
packageNamePrefixLengths = new int[packageNames.size()];
for (int i = 0; i < packageNamePrefixes.length; i++) {
packageNamePrefixes[i] = FILE_STRING + packageNames.get(i) + "/";
packageNamePrefixLengths[i] = packageNamePrefixes[i].length();
}
}
/**
* removes a "File: module/" prefix if present.
*
* @return null if the line was shorter than expected.
*/
private static String removePackageName(String line,
String[] packagePrefixes,
int[] prefixLengths) {
if (line.length() < FILE_STRING_LENGTH) {
return null;
}
for (int i = 0; i < packagePrefixes.length; i++) {
if (line.startsWith(packagePrefixes[i])) {
return line.substring(prefixLengths[i]);
}
}
return line.substring(FILE_STRING_LENGTH);
}
}
