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package org.eclipse.jgit.patch;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.HashSet;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.util.MutableInteger;
import org.eclipse.jgit.util.RawParseUtils;
import org.eclipse.jgit.util.TemporaryBuffer;
import org.junit.Test;
public class EGitPatchHistoryTest {
@Test
public void testParseHistory() throws Exception {
final NumStatReader numstat = new NumStatReader();
numstat.read();
final HashMap<String, HashMap<String, StatInfo>> stats = numstat.stats;
assertEquals(1211, stats.size());
new PatchReader(stats).read();
}
static class StatInfo {
int added, deleted;
}
static class PatchReader extends CommitReader {
final HashSet<String> offBy1;
final HashMap<String, HashMap<String, StatInfo>> stats;
int errors;
PatchReader(final HashMap<String, HashMap<String, StatInfo>> s)
throws IOException {
super(new String[] { "-p" });
stats = s;
offBy1 = new HashSet<String>();
offBy1.add("9bda5ece6806cd797416eaa47c7b927cc6e9c3b2");
}
@Override
void onCommit(String cid, byte[] buf) {
final HashMap<String, StatInfo> files = stats.remove(cid);
assertNotNull("No files for " + cid, files);
final Patch p = new Patch();
p.parse(buf, 0, buf.length - 1);
assertEquals("File count " + cid, files.size(), p.getFiles().size());
if (!p.getErrors().isEmpty()) {
for (final FormatError e : p.getErrors()) {
System.out.println("error " + e.getMessage());
System.out.println(" at " + e.getLineText());
}
dump(buf);
fail("Unexpected error in " + cid);
}
for (final FileHeader fh : p.getFiles()) {
final String fileName;
if (fh.getChangeType() != FileHeader.ChangeType.DELETE)
fileName = fh.getNewPath();
else
fileName = fh.getOldPath();
final StatInfo s = files.remove(fileName);
final String nid = fileName + " in " + cid;
assertNotNull("No " + nid, s);
int added = 0, deleted = 0;
for (final HunkHeader h : fh.getHunks()) {
added += h.getOldImage().getLinesAdded();
deleted += h.getOldImage().getLinesDeleted();
}
if (s.added == added) {
//
} else if (s.added == added + 1 && offBy1.contains(cid)) {
//
} else {
dump(buf);
assertEquals("Added diff in " + nid, s.added, added);
}
if (s.deleted == deleted) {
//
} else if (s.deleted == deleted + 1 && offBy1.contains(cid)) {
//
} else {
dump(buf);
assertEquals("Deleted diff in " + nid, s.deleted, deleted);
}
}
assertTrue("Missed files in " + cid, files.isEmpty());
}
private static void dump(final byte[] buf) {
String str;
try {
str = new String(buf, 0, buf.length - 1, "ISO-8859-1");
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
System.out.println("<<" + str + ">>");
}
}
static class NumStatReader extends CommitReader {
final HashMap<String, HashMap<String, StatInfo>> stats = new HashMap<String, HashMap<String, StatInfo>>();
NumStatReader() throws IOException {
super(new String[] { "--numstat" });
}
@Override
void onCommit(String commitId, byte[] buf) {
final HashMap<String, StatInfo> files = new HashMap<String, StatInfo>();
final MutableInteger ptr = new MutableInteger();
while (ptr.value < buf.length) {
if (buf[ptr.value] == '\n')
break;
final StatInfo i = new StatInfo();
i.added = RawParseUtils.parseBase10(buf, ptr.value, ptr);
i.deleted = RawParseUtils.parseBase10(buf, ptr.value + 1, ptr);
final int eol = RawParseUtils.nextLF(buf, ptr.value);
final String name = RawParseUtils.decode(Constants.CHARSET,
buf, ptr.value + 1, eol - 1);
files.put(name, i);
ptr.value = eol;
}
stats.put(commitId, files);
}
}
static abstract class CommitReader {
private Process proc;
CommitReader(final String[] args) throws IOException {
final String[] realArgs = new String[3 + args.length + 1];
realArgs[0] = "git";
realArgs[1] = "log";
realArgs[2] = "--pretty=format:commit %H";
System.arraycopy(args, 0, realArgs, 3, args.length);
realArgs[3 + args.length] = "a4b98ed15ea5f165a7aa0f2fd2ea6fcce6710925";
proc = Runtime.getRuntime().exec(realArgs);
proc.getOutputStream().close();
proc.getErrorStream().close();
}
void read() throws IOException, InterruptedException {
final BufferedReader in = new BufferedReader(new InputStreamReader(
proc.getInputStream(), "ISO-8859-1"));
String commitId = null;
TemporaryBuffer buf = null;
for (;;) {
String line = in.readLine();
if (line == null)
break;
if (line.startsWith("commit ")) {
if (buf != null) {
buf.close();
onCommit(commitId, buf.toByteArray());
buf.destroy();
}
commitId = line.substring("commit ".length());
buf = new TemporaryBuffer.LocalFile(null);
} else if (buf != null) {
buf.write(line.getBytes("ISO-8859-1"));
buf.write('\n');
}
}
in.close();
assertEquals(0, proc.waitFor());
proc = null;
}
abstract void onCommit(String commitId, byte[] buf);
}
}