/*
* #%L
* JavaHg
* %%
* Copyright (C) 2011 aragost Trifork ag
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
package com.aragost.javahg.internals;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.aragost.javahg.commands.ManifestMergeOracle;
import com.aragost.javahg.commands.UpdateResult;
import com.google.common.io.ByteStreams;
/**
* A helper class to parse output from update and merge commands.
*/
public class UpdateMergeHelper {
private static final Pattern MANIFEST_MERGE_PATTERN = Pattern.compile("remote changed (.*) which local deleted\n"
+ "use \\(c\\)hanged version or leave \\(d\\)eleted\\? ");
private InputStream stdout;
private ManifestMergeOracle oracle;
private AbstractCommand command;
public UpdateMergeHelper(InputStream stdout, ManifestMergeOracle oracle, AbstractCommand command) {
this.stdout = stdout;
this.oracle = oracle;
this.command = command;
}
public void merge() throws IOException {
processManifestMergeConflictPrompting();
}
public UpdateResult update() throws IOException {
String output = processManifestMergeConflictPrompting();
BufferedReader reader = new BufferedReader(new StringReader(output));
String line;
UpdateResult result = null;
while ((line = reader.readLine()) != null) {
if (line.startsWith("merging ")) {
// Just ignore
} else if (line.equals("use 'hg resolve' to retry unresolved file merges")) {
// Ignore
} else {
result = UpdateResult.fromLine(line);
}
}
if (result == null) {
throw new IllegalStateException("No 'update' line found in output");
}
return result;
}
private String processManifestMergeConflictPrompting() throws IOException {
if (this.oracle != null) {
this.oracle.getMissingAnswers().clear();
}
String output = null;
while (true) {
output = new String(ByteStreams.toByteArray(this.stdout));
Matcher matcher = MANIFEST_MERGE_PATTERN.matcher(output);
if (matcher.matches()) {
if (oracle == null) {
throw new RuntimeException("Manifest merge conflict, but no oracle");
}
String filename = output.substring(matcher.start(1), matcher.end(1));
String answer = oracle.ask(filename);
this.command.sendLine(answer);
this.command.reopenOutputChannelStream();
} else {
break;
}
}
return output;
}
}