tikhomirov@13: /*
tikhomirov@537: * Copyright (c) 2010-2013 TMate Software Ltd
tikhomirov@74: *
tikhomirov@74: * This program is free software; you can redistribute it and/or modify
tikhomirov@74: * it under the terms of the GNU General Public License as published by
tikhomirov@74: * the Free Software Foundation; version 2 of the License.
tikhomirov@74: *
tikhomirov@74: * This program is distributed in the hope that it will be useful,
tikhomirov@74: * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@74: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
tikhomirov@74: * GNU General Public License for more details.
tikhomirov@74: *
tikhomirov@74: * For information on how to redistribute this software under
tikhomirov@74: * the terms of a license other than GNU General Public License
tikhomirov@102: * contact TMate Software at support@hg4j.com
tikhomirov@2: */
tikhomirov@74: package org.tmatesoft.hg.repo;
tikhomirov@74:
tikhomirov@390: import static org.tmatesoft.hg.core.Nodeid.NULL;
tikhomirov@423: import static org.tmatesoft.hg.repo.HgRepository.*;
tikhomirov@456: import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
tikhomirov@218:
tikhomirov@232: import java.io.ByteArrayOutputStream;
tikhomirov@157: import java.io.IOException;
tikhomirov@218: import java.util.ArrayList;
tikhomirov@218: import java.util.Arrays;
tikhomirov@157:
tikhomirov@417: import org.tmatesoft.hg.core.HgChangesetFileSneaker;
tikhomirov@74: import org.tmatesoft.hg.core.Nodeid;
tikhomirov@423: import org.tmatesoft.hg.internal.Callback;
tikhomirov@157: import org.tmatesoft.hg.internal.DataAccess;
tikhomirov@266: import org.tmatesoft.hg.internal.DigestHelper;
tikhomirov@320: import org.tmatesoft.hg.internal.EncodingHelper;
tikhomirov@415: import org.tmatesoft.hg.internal.IntMap;
tikhomirov@312: import org.tmatesoft.hg.internal.IterateControlMediator;
tikhomirov@218: import org.tmatesoft.hg.internal.Lifecycle;
tikhomirov@431: import org.tmatesoft.hg.internal.IdentityPool;
tikhomirov@77: import org.tmatesoft.hg.internal.RevlogStream;
tikhomirov@312: import org.tmatesoft.hg.util.CancelSupport;
tikhomirov@232: import org.tmatesoft.hg.util.Path;
tikhomirov@312: import org.tmatesoft.hg.util.ProgressSupport;
tikhomirov@456: import org.tmatesoft.hg.util.LogFacility.Severity;
tikhomirov@74:
tikhomirov@2:
tikhomirov@2: /**
tikhomirov@425: * Representation of Mercurial manifest file (list of file names and their revisions in a particular changeset)
tikhomirov@425: *
tikhomirov@425: * @see http://mercurial.selenic.com/wiki/Manifest
tikhomirov@74: * @author Artem Tikhomirov
tikhomirov@74: * @author TMate Software Ltd.
tikhomirov@2: */
tikhomirov@426: public final class HgManifest extends Revlog {
tikhomirov@218: private RevisionMapper revisionMap;
tikhomirov@412: private EncodingHelper encodingHelper;
tikhomirov@285:
tikhomirov@415: /**
tikhomirov@415: * File flags recorded in manifest
tikhomirov@415: */
tikhomirov@285: public enum Flags {
tikhomirov@415: /**
tikhomirov@415: * Executable bit set
tikhomirov@415: */
tikhomirov@415: Exec,
tikhomirov@415: /**
tikhomirov@415: * Symbolic link
tikhomirov@415: */
tikhomirov@415: Link,
tikhomirov@415: /**
tikhomirov@415: * Regular file
tikhomirov@415: */
tikhomirov@415: RegularFile;
tikhomirov@285:
tikhomirov@285: static Flags parse(String flags) {
tikhomirov@285: if ("x".equalsIgnoreCase(flags)) {
tikhomirov@285: return Exec;
tikhomirov@285: }
tikhomirov@285: if ("l".equalsIgnoreCase(flags)) {
tikhomirov@285: return Link;
tikhomirov@285: }
tikhomirov@285: if (flags == null) {
tikhomirov@415: return RegularFile;
tikhomirov@285: }
tikhomirov@285: throw new IllegalStateException(flags);
tikhomirov@285: }
tikhomirov@285:
tikhomirov@285: static Flags parse(byte[] data, int start, int length) {
tikhomirov@285: if (length == 0) {
tikhomirov@415: return RegularFile;
tikhomirov@285: }
tikhomirov@285: if (length == 1) {
tikhomirov@285: if (data[start] == 'x') {
tikhomirov@285: return Exec;
tikhomirov@285: }
tikhomirov@285: if (data[start] == 'l') {
tikhomirov@285: return Link;
tikhomirov@285: }
tikhomirov@285: // FALL THROUGH
tikhomirov@285: }
tikhomirov@285: throw new IllegalStateException(new String(data, start, length));
tikhomirov@285: }
tikhomirov@285:
tikhomirov@285: String nativeString() {
tikhomirov@285: if (this == Exec) {
tikhomirov@285: return "x";
tikhomirov@285: }
tikhomirov@285: if (this == Link) {
tikhomirov@285: return "l";
tikhomirov@285: }
tikhomirov@415: if (this == RegularFile) {
tikhomirov@415: return "";
tikhomirov@415: }
tikhomirov@285: throw new IllegalStateException(toString());
tikhomirov@285: }
tikhomirov@285: }
tikhomirov@2:
tikhomirov@412: /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
tikhomirov@21: super(hgRepo, content);
tikhomirov@412: encodingHelper = eh;
tikhomirov@13: }
tikhomirov@13:
tikhomirov@218: /**
tikhomirov@390: * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
tikhomirov@390: * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
tikhomirov@390: * That is, for cset-manifest revision pairs:
tikhomirov@390: *
tikhomirov@390: * 3 8
tikhomirov@390: * 4 7
tikhomirov@390: * 5 9
tikhomirov@390: *
tikhomirov@390: * call walk(3,5, insp) would yield (4,7), (3,8) and (5,9) to the inspector;
tikhomirov@390: * different order of arguments, walk(5, 3, insp), makes no difference.
tikhomirov@390: *
tikhomirov@390: * Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
tikhomirov@390: * incrementally, nor it mandates presence of manifest version for a changeset. Thus, there might be changesets that record {@link Nodeid#NULL}
tikhomirov@390: * as corresponding manifest revision. This situation is deemed exceptional now and what would inspector get depends on whether
tikhomirov@390: * start or end arguments point to such changeset, or such changeset happen to be somewhere inside the range
tikhomirov@423: * [start..end]. Implementation does it best to report empty manifests
tikhomirov@423: * (Inspector.begin(HgRepository.NO_REVISION, NULL, csetRevIndex);
tikhomirov@423: * followed immediately by Inspector.end(HgRepository.NO_REVISION)
tikhomirov@423: * when start and/or end point to changeset with no associated
tikhomirov@390: * manifest revision. However, if changeset-manifest revision pairs look like:
tikhomirov@390: *
tikhomirov@390: * 3 8
tikhomirov@390: * 4 -1 (cset records null revision for manifest)
tikhomirov@390: * 5 9
tikhomirov@390: *
tikhomirov@390: * call walk(3,5, insp) would yield only (3,8) and (5,9) to the inspector, without additional empty
tikhomirov@390: * Inspector.begin(); Inspector.end() call pair.
tikhomirov@218: *
tikhomirov@423: * @see HgRepository#NO_REVISION
tikhomirov@218: * @param start changelog (not manifest!) revision to begin with
tikhomirov@218: * @param end changelog (not manifest!) revision to stop, inclusive.
tikhomirov@390: * @param inspector manifest revision visitor, can't be null
tikhomirov@423: * @throws HgRuntimeException subclass thereof to indicate issues with the library. Runtime exception
tikhomirov@423: * @throws IllegalArgumentException if inspector callback is null
tikhomirov@218: */
tikhomirov@423: public void walk(int start, int end, final Inspector inspector) throws HgRuntimeException, IllegalArgumentException {
tikhomirov@196: if (inspector == null) {
tikhomirov@196: throw new IllegalArgumentException();
tikhomirov@196: }
tikhomirov@390: final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
tikhomirov@390: int manifestFirst, manifestLast, i = 0;
tikhomirov@390: do {
tikhomirov@390: manifestFirst = fromChangelog(csetFirst+i);
tikhomirov@403: if (manifestFirst == BAD_REVISION) {
tikhomirov@423: inspector.begin(NO_REVISION, NULL, csetFirst+i);
tikhomirov@423: inspector.end(NO_REVISION);
tikhomirov@390: }
tikhomirov@390: i++;
tikhomirov@403: } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
tikhomirov@403: if (manifestFirst == BAD_REVISION) {
tikhomirov@490: getRepo().getSessionContext().getLog().dump(getClass(), Info, "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
tikhomirov@390: // we ran through all revisions in [start..end] and none of them had manifest.
tikhomirov@390: // we reported that to inspector and proceeding is done now.
tikhomirov@390: return;
tikhomirov@390: }
tikhomirov@390: i = 0;
tikhomirov@390: do {
tikhomirov@390: manifestLast = fromChangelog(csetLast-i);
tikhomirov@403: if (manifestLast == BAD_REVISION) {
tikhomirov@423: inspector.begin(NO_REVISION, NULL, csetLast-i);
tikhomirov@423: inspector.end(NO_REVISION);
tikhomirov@390: }
tikhomirov@390: i++;
tikhomirov@403: } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
tikhomirov@403: if (manifestLast == BAD_REVISION) {
tikhomirov@423: // hmm, manifestFirst != BAD_REVISION here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
tikhomirov@423: // and thus it's impossible to run into manifestLast == BAD_REVISION. Nevertheless, never hurts to check.
tikhomirov@423: throw new HgInvalidStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
tikhomirov@390: }
tikhomirov@390: if (manifestLast < manifestFirst) {
tikhomirov@300: // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
tikhomirov@390: int x = manifestLast;
tikhomirov@390: manifestLast = manifestFirst;
tikhomirov@390: manifestFirst = x;
tikhomirov@300: }
tikhomirov@571: content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector));
tikhomirov@19: }
tikhomirov@218:
tikhomirov@254: /**
tikhomirov@390: * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
tikhomirov@390: * Inspector is invoked for each changeset revision supplied, even when there's no manifest
tikhomirov@390: * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
tikhomirov@390: * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
tikhomirov@390: * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
tikhomirov@254: *
tikhomirov@390: * @param inspector manifest revision visitor, can't be null
tikhomirov@390: * @param revisionIndexes local indexes of changesets to visit, non-null
tikhomirov@423: * @throws HgRuntimeException subclass thereof to indicate issues with the library. Runtime exception
tikhomirov@423: * @throws InvalidArgumentException if supplied arguments are nulls
tikhomirov@254: */
tikhomirov@423: public void walk(final Inspector inspector, int... revisionIndexes) throws HgRuntimeException, IllegalArgumentException {
tikhomirov@367: if (inspector == null || revisionIndexes == null) {
tikhomirov@254: throw new IllegalArgumentException();
tikhomirov@254: }
tikhomirov@390: int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
tikhomirov@571: content.iterate(manifestRevs, true, new ManifestParser(inspector));
tikhomirov@254: }
tikhomirov@254:
tikhomirov@390: //
tikhomirov@390: /**
tikhomirov@403: * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
tikhomirov@403: * if changeset has no associated manifest (cset records NULL nodeid for manifest).
tikhomirov@403: * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
tikhomirov@403: * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
tikhomirov@403: * @throws HgInvalidControlFileException if access to revlog index/data entry failed
tikhomirov@390: */
tikhomirov@403: /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
tikhomirov@368: if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
tikhomirov@425: throw new HgInvalidRevisionException(changesetRevisionIndex);
tikhomirov@218: }
tikhomirov@368: if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
tikhomirov@425: throw new HgInvalidRevisionException("Can't use constants like WORKING_COPY or BAD_REVISION", null, changesetRevisionIndex);
tikhomirov@257: }
tikhomirov@257: // revisionNumber == TIP is processed by RevisionMapper
tikhomirov@218: if (revisionMap == null) {
tikhomirov@218: revisionMap = new RevisionMapper(getRepo());
tikhomirov@218: content.iterate(0, TIP, false, revisionMap);
tikhomirov@218: }
tikhomirov@368: return revisionMap.at(changesetRevisionIndex);
tikhomirov@218: }
tikhomirov@218:
tikhomirov@232: /**
tikhomirov@232: * Extracts file revision as it was known at the time of given changeset.
tikhomirov@426: *
For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
tikhomirov@426: *
To visit few changesets for the same file, use {@link #walkFileRevisions(Path, Inspector, int...)}
tikhomirov@232: *
tikhomirov@426: * @see #walkFileRevisions(Path, Inspector, int...)
tikhomirov@417: * @see HgChangesetFileSneaker
tikhomirov@367: * @param changelogRevisionIndex local changeset index
tikhomirov@232: * @param file path to file in question
tikhomirov@232: * @return file revision or null if manifest at specified revision doesn't list such file
tikhomirov@425: * @throws HgRuntimeException subclass thereof to indicate issues with the library. Runtime exception
tikhomirov@232: */
tikhomirov@403: public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
tikhomirov@417: // there's no need for HgDataFile to own this method, or get a delegate
tikhomirov@417: // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
tikhomirov@417: // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
tikhomirov@547: // file revision (the task this method solves), except for HgFileInformer
tikhomirov@417: // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
tikhomirov@547: // TODO need tests (e.g. pass TIP here to see resMap.get(-1) doesn't fail)
tikhomirov@426: int manifestRevIndex = fromChangelog(changelogRevisionIndex);
tikhomirov@426: if (manifestRevIndex == BAD_REVISION) {
tikhomirov@426: return null;
tikhomirov@426: }
tikhomirov@426: IntMap resMap = new IntMap(3);
tikhomirov@426: FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, resMap, null);
tikhomirov@426: parser.walk(manifestRevIndex, content);
tikhomirov@550: assert resMap.size() <= 1; // size() == 0 if file wasn't found
tikhomirov@547: // can't use changelogRevisionIndex as key - it might have been TIP
tikhomirov@550: return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
tikhomirov@326: }
tikhomirov@426:
tikhomirov@426: /**
tikhomirov@426: * Visit file revisions as they were recorded at the time of given changesets. Same file revision may be reported as many times as
tikhomirov@426: * there are changesets that refer to that revision. Both {@link Inspector#begin(int, Nodeid, int)} and {@link Inspector#end(int)}
tikhomirov@426: * with appropriate values are invoked around {@link Inspector#next(Nodeid, Path, Flags)} call for the supplied file
tikhomirov@426: *
tikhomirov@426: * NOTE, this method doesn't respect return values from callback (i.e. to stop iteration), as it's lookup of a single file
tikhomirov@426: * and canceling it seems superfluous. However, this may change in future and it's recommended to return true from
tikhomirov@426: * all {@link Inspector} methods.
tikhomirov@426: *
tikhomirov@426: * @see #getFileRevision(int, Path)
tikhomirov@426: * @param file path of interest
tikhomirov@426: * @param inspector callback to receive details about selected file
tikhomirov@426: * @param changelogRevisionIndexes changeset indexes to visit
tikhomirov@426: * @throws HgRuntimeException subclass thereof to indicate issues with the library. Runtime exception
tikhomirov@426: */
tikhomirov@426: public void walkFileRevisions(Path file, Inspector inspector, int... changelogRevisionIndexes) throws HgRuntimeException {
tikhomirov@426: if (file == null || inspector == null || changelogRevisionIndexes == null) {
tikhomirov@426: throw new IllegalArgumentException();
tikhomirov@426: }
tikhomirov@426: // TODO [post-1.0] need tests. There's Main#checkWalkFileRevisions that may be a starting point
tikhomirov@426: int[] manifestRevIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
tikhomirov@426: FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, inspector);
tikhomirov@426: parser.walk(manifestRevIndexes, content);
tikhomirov@232: }
tikhomirov@326:
tikhomirov@415: /**
tikhomirov@417: * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
tikhomirov@417: *
tikhomirov@417: * @see HgDataFile#getFlags(int)
tikhomirov@415: * @param changesetRevIndex changeset revision index
tikhomirov@415: * @param file path to look up
tikhomirov@417: * @return one of predefined enum values, or null if file was not known in the specified revision
tikhomirov@425: * @throws HgRuntimeException subclass thereof to indicate issues with the library. Runtime exception
tikhomirov@415: */
tikhomirov@417: public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
tikhomirov@415: int manifestRevIdx = fromChangelog(changesetRevIndex);
tikhomirov@415: IntMap resMap = new IntMap(2);
tikhomirov@426: FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, null, resMap);
tikhomirov@426: parser.walk(manifestRevIdx, content);
tikhomirov@550: assert resMap.size() <= 1; // size() == 0 if not found
tikhomirov@547: // can't use changesetRevIndex as key - it might have been TIP
tikhomirov@550: return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
tikhomirov@415: }
tikhomirov@415:
tikhomirov@326:
tikhomirov@390: /**
tikhomirov@390: * @param changelogRevisionIndexes non-null
tikhomirov@390: * @param inspector may be null if reporting of missing manifests is not needed
tikhomirov@403: * @throws HgInvalidRevisionException if arguments specify non-existent revision index
tikhomirov@403: * @throws IllegalArgumentException if any index argument is not a revision index
tikhomirov@403: * @throws HgInvalidControlFileException if access to revlog index/data entry failed
tikhomirov@390: */
tikhomirov@403: private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
tikhomirov@368: int[] manifestRevs = new int[changelogRevisionIndexes.length];
tikhomirov@326: boolean needsSort = false;
tikhomirov@390: int j = 0;
tikhomirov@367: for (int i = 0; i < changelogRevisionIndexes.length; i++) {
tikhomirov@367: final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
tikhomirov@403: if (manifestRevisionIndex == BAD_REVISION) {
tikhomirov@390: if (inspector != null) {
tikhomirov@423: inspector.begin(NO_REVISION, NULL, changelogRevisionIndexes[i]);
tikhomirov@423: inspector.end(NO_REVISION);
tikhomirov@390: }
tikhomirov@390: // othrwise, ignore changeset without manifest
tikhomirov@390: } else {
tikhomirov@390: manifestRevs[j] = manifestRevisionIndex;
tikhomirov@390: if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
tikhomirov@390: needsSort = true;
tikhomirov@390: }
tikhomirov@390: j++;
tikhomirov@326: }
tikhomirov@326: }
tikhomirov@326: if (needsSort) {
tikhomirov@390: Arrays.sort(manifestRevs, 0, j);
tikhomirov@326: }
tikhomirov@390: if (j == manifestRevs.length) {
tikhomirov@390: return manifestRevs;
tikhomirov@390: } else {
tikhomirov@390: int[] rv = new int[j];
tikhomirov@390: //Arrays.copyOfRange
tikhomirov@390: System.arraycopy(manifestRevs, 0, rv, 0, j);
tikhomirov@390: return rv;
tikhomirov@390: }
tikhomirov@326: }
tikhomirov@326:
tikhomirov@423: @Callback
tikhomirov@19: public interface Inspector {
tikhomirov@285: /**
tikhomirov@537: * Denotes entering specific manifest revision, separate entries are
tikhomirov@537: * reported with subsequence {@link #next(Nodeid, Path, Flags)} calls.
tikhomirov@537: *
tikhomirov@537: * @param mainfestRevisionIndex local revision index of the inspected revision
tikhomirov@537: * @param manifestRevision revision of the manifest we're about to iterate through
tikhomirov@537: * @param changelogRevisionIndex local revision index of changelog this manifest points to
tikhomirov@537: * @return true to continue iteration, false to stop
tikhomirov@537: */
tikhomirov@537: boolean begin(int mainfestRevisionIndex, Nodeid manifestRevision, int changelogRevisionIndex);
tikhomirov@537:
tikhomirov@537:
tikhomirov@537: /**
tikhomirov@537: * Reports each manifest entry
tikhomirov@537: *
tikhomirov@415: * @param nid file revision
tikhomirov@415: * @param fname file name
tikhomirov@415: * @param flags one of {@link HgManifest.Flags} constants, not null
tikhomirov@415: * @return true to continue iteration, false to stop
tikhomirov@415: */
tikhomirov@285: boolean next(Nodeid nid, Path fname, Flags flags);
tikhomirov@537:
tikhomirov@537: /**
tikhomirov@537: * Denotes leaving specific manifest revision, after all entries were reported using {@link #next(Nodeid, Path, Flags)}
tikhomirov@537: *
tikhomirov@537: * @param manifestRevisionIndex indicates manifest revision, corresponds to opening {@link #begin(int, Nodeid, int)}
tikhomirov@537: * @return true to continue iteration, false to stop
tikhomirov@537: */
tikhomirov@537: boolean end(int manifestRevisionIndex);
tikhomirov@267: }
tikhomirov@424:
tikhomirov@268: /**
tikhomirov@268: * When Pool uses Strings directly,
tikhomirov@268: * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
tikhomirov@268: * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
tikhomirov@268: * This means there are 15.9 million useless char[] instances and byte->char conversions
tikhomirov@268: *
tikhomirov@285: * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
tikhomirov@285: * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
tikhomirov@268: * useless char[] and byte->char conversions.
tikhomirov@268: */
tikhomirov@571: private final class PathProxy {
tikhomirov@267: private byte[] data;
tikhomirov@268: private int start;
tikhomirov@268: private final int hash, length;
tikhomirov@285: private Path result;
tikhomirov@267:
tikhomirov@571: public PathProxy(byte[] data, int start, int length) {
tikhomirov@267: this.data = data;
tikhomirov@267: this.start = start;
tikhomirov@267: this.length = length;
tikhomirov@267:
tikhomirov@268: // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
tikhomirov@268: // just need some nice algorithm here
tikhomirov@267: int h = 0;
tikhomirov@267: byte[] d = data;
tikhomirov@267: for (int i = 0, off = start, len = length; i < len; i++) {
tikhomirov@267: h = 31 * h + d[off++];
tikhomirov@267: }
tikhomirov@267: hash = h;
tikhomirov@267: }
tikhomirov@267:
tikhomirov@267: @Override
tikhomirov@267: public boolean equals(Object obj) {
tikhomirov@285: if (false == obj instanceof PathProxy) {
tikhomirov@267: return false;
tikhomirov@267: }
tikhomirov@285: PathProxy o = (PathProxy) obj;
tikhomirov@267: if (o.result != null && result != null) {
tikhomirov@267: return result.equals(o.result);
tikhomirov@267: }
tikhomirov@268: if (o.length != length || o.hash != hash) {
tikhomirov@267: return false;
tikhomirov@267: }
tikhomirov@267: for (int i = 0, x = o.start, y = start; i < length; i++) {
tikhomirov@267: if (o.data[x++] != data[y++]) {
tikhomirov@267: return false;
tikhomirov@267: }
tikhomirov@267: }
tikhomirov@267: return true;
tikhomirov@267: }
tikhomirov@267: @Override
tikhomirov@267: public int hashCode() {
tikhomirov@267: return hash;
tikhomirov@267: }
tikhomirov@267:
tikhomirov@285: public Path freeze() {
tikhomirov@267: if (result == null) {
tikhomirov@571: Path.Source pathFactory = HgManifest.this.getRepo().getSessionContext().getPathFactory();
tikhomirov@571: result = pathFactory.path(HgManifest.this.encodingHelper.fromManifest(data, start, length));
tikhomirov@268: // release reference to bigger data array, make a copy of relevant part only
tikhomirov@285: // use original bytes, not those from String above to avoid cache misses due to different encodings
tikhomirov@268: byte[] d = new byte[length];
tikhomirov@268: System.arraycopy(data, start, d, 0, length);
tikhomirov@268: data = d;
tikhomirov@268: start = 0;
tikhomirov@267: }
tikhomirov@267: return result;
tikhomirov@267: }
tikhomirov@267: }
tikhomirov@196:
tikhomirov@571: private class ManifestParser implements RevlogStream.Inspector, Lifecycle {
tikhomirov@196: private final Inspector inspector;
tikhomirov@431: private IdentityPool nodeidPool, thisRevPool;
tikhomirov@431: private final IdentityPool fnamePool;
tikhomirov@266: private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
tikhomirov@312: private final ProgressSupport progressHelper;
tikhomirov@312: private IterateControlMediator iterateControl;
tikhomirov@262:
tikhomirov@571: public ManifestParser(Inspector delegate) {
tikhomirov@196: assert delegate != null;
tikhomirov@196: inspector = delegate;
tikhomirov@431: nodeidPool = new IdentityPool();
tikhomirov@431: fnamePool = new IdentityPool();
tikhomirov@431: thisRevPool = new IdentityPool();
tikhomirov@312: progressHelper = ProgressSupport.Factory.get(delegate);
tikhomirov@196: }
tikhomirov@268:
tikhomirov@423: public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
tikhomirov@196: try {
tikhomirov@312: if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
tikhomirov@312: iterateControl.stop();
tikhomirov@312: return;
tikhomirov@312: }
tikhomirov@372: if (!da.isEmpty()) {
tikhomirov@372: // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
tikhomirov@372: Path fname = null;
tikhomirov@372: Flags flags = null;
tikhomirov@372: Nodeid nid = null;
tikhomirov@372: int i;
tikhomirov@372: byte[] data = da.byteArray();
tikhomirov@372: for (i = 0; i < actualLen; i++) {
tikhomirov@372: int x = i;
tikhomirov@372: for( ; data[i] != '\n' && i < actualLen; i++) {
tikhomirov@372: if (fname == null && data[i] == 0) {
tikhomirov@571: PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x));
tikhomirov@372: // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
tikhomirov@372: // cpython 0..10k: hits: 15 989 152, misses: 3020
tikhomirov@372: fname = px.freeze();
tikhomirov@372: x = i+1;
tikhomirov@372: }
tikhomirov@196: }
tikhomirov@372: if (i < actualLen) {
tikhomirov@372: assert data[i] == '\n';
tikhomirov@372: int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
tikhomirov@372: DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
tikhomirov@372: nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
tikhomirov@372: Nodeid cached = nodeidPool.unify(nid);
tikhomirov@372: if (cached == nid) {
tikhomirov@372: // buffer now belongs to the cached nodeid
tikhomirov@372: nodeidLookupBuffer = new byte[20];
tikhomirov@372: } else {
tikhomirov@372: nid = cached; // use existing version, discard the lookup object
tikhomirov@372: } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
tikhomirov@372: thisRevPool.record(nid); // memorize revision for the next iteration.
tikhomirov@372: if (nodeidLen + x < i) {
tikhomirov@372: // 'x' and 'l' for executable bits and symlinks?
tikhomirov@372: // hg --debug manifest shows 644 for each regular file in my repo
tikhomirov@372: // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
tikhomirov@372: flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
tikhomirov@372: } else {
tikhomirov@415: flags = Flags.RegularFile;
tikhomirov@372: }
tikhomirov@424: boolean good2go = inspector.next(nid, fname, flags);
tikhomirov@372: if (!good2go) {
tikhomirov@372: iterateControl.stop();
tikhomirov@372: return;
tikhomirov@372: }
tikhomirov@372: }
tikhomirov@372: nid = null;
tikhomirov@372: fname = null;
tikhomirov@372: flags = null;
tikhomirov@196: }
tikhomirov@196: }
tikhomirov@312: if (!inspector.end(revisionNumber)) {
tikhomirov@312: iterateControl.stop();
tikhomirov@312: return;
tikhomirov@312: }
tikhomirov@262: //
tikhomirov@262: // keep only actual file revisions, found at this version
tikhomirov@262: // (next manifest is likely to refer to most of them, although in specific cases
tikhomirov@262: // like commit in another branch a lot may be useless)
tikhomirov@262: nodeidPool.clear();
tikhomirov@431: IdentityPool t = nodeidPool;
tikhomirov@262: nodeidPool = thisRevPool;
tikhomirov@264: thisRevPool = t;
tikhomirov@313: iterateControl.checkCancelled();
tikhomirov@312: progressHelper.worked(1);
tikhomirov@196: } catch (IOException ex) {
tikhomirov@423: throw new HgInvalidControlFileException("Failed reading manifest", ex, null).setRevisionIndex(revisionNumber);
tikhomirov@196: }
tikhomirov@196: }
tikhomirov@312:
tikhomirov@312: public void start(int count, Callback callback, Object token) {
tikhomirov@312: CancelSupport cs = CancelSupport.Factory.get(inspector, null);
tikhomirov@312: iterateControl = new IterateControlMediator(cs, callback);
tikhomirov@312: progressHelper.start(count);
tikhomirov@312: }
tikhomirov@312:
tikhomirov@312: public void finish(Object token) {
tikhomirov@312: progressHelper.done();
tikhomirov@312: }
tikhomirov@196: }
tikhomirov@218:
tikhomirov@218: private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
tikhomirov@218:
tikhomirov@403: private final int changelogRevisionCount;
tikhomirov@218: private int[] changelog2manifest;
tikhomirov@218: private final HgRepository repo;
tikhomirov@218:
tikhomirov@218: public RevisionMapper(HgRepository hgRepo) {
tikhomirov@218: repo = hgRepo;
tikhomirov@403: changelogRevisionCount = repo.getChangelog().getRevisionCount();
tikhomirov@218: }
tikhomirov@218:
tikhomirov@403: /**
tikhomirov@403: * Get index of manifest revision that corresponds to specified changeset
tikhomirov@403: * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
tikhomirov@403: * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
tikhomirov@403: * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
tikhomirov@403: */
tikhomirov@403: public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
tikhomirov@403: if (changesetRevisionIndex == TIP) {
tikhomirov@403: changesetRevisionIndex = changelogRevisionCount - 1;
tikhomirov@403: }
tikhomirov@403: if (changesetRevisionIndex >= changelogRevisionCount) {
tikhomirov@403: throw new HgInvalidRevisionException(changesetRevisionIndex);
tikhomirov@257: }
tikhomirov@218: if (changelog2manifest != null) {
tikhomirov@403: return changelog2manifest[changesetRevisionIndex];
tikhomirov@218: }
tikhomirov@403: return changesetRevisionIndex;
tikhomirov@218: }
tikhomirov@218:
tikhomirov@324: // XXX likely can be replaced with Revlog.RevisionInspector
tikhomirov@218: public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
tikhomirov@218: if (changelog2manifest != null) {
tikhomirov@220: // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
tikhomirov@220: // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
tikhomirov@220: // changeset records one and only one manifest nodeid
tikhomirov@403: assert changelog2manifest[linkRevision] == BAD_REVISION : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
tikhomirov@218: changelog2manifest[linkRevision] = revisionNumber;
tikhomirov@218: } else {
tikhomirov@218: if (revisionNumber != linkRevision) {
tikhomirov@403: changelog2manifest = new int[changelogRevisionCount];
tikhomirov@403: Arrays.fill(changelog2manifest, BAD_REVISION);
tikhomirov@218: for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
tikhomirov@218: ;
tikhomirov@218: changelog2manifest[linkRevision] = revisionNumber;
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@218:
tikhomirov@218: public void start(int count, Callback callback, Object token) {
tikhomirov@403: if (count != changelogRevisionCount) {
tikhomirov@403: assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
tikhomirov@218: // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
tikhomirov@218: // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
tikhomirov@218: // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
tikhomirov@218: // in cpython repo are numbered makes me think aforementioned way)
tikhomirov@403: changelog2manifest = new int[changelogRevisionCount];
tikhomirov@403: Arrays.fill(changelog2manifest, BAD_REVISION);
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@218:
tikhomirov@218: public void finish(Object token) {
tikhomirov@218: if (changelog2manifest == null) {
tikhomirov@218: return;
tikhomirov@218: }
tikhomirov@218: // I assume there'd be not too many revisions we don't know manifest of
tikhomirov@218: ArrayList undefinedChangelogRevision = new ArrayList();
tikhomirov@218: for (int i = 0; i < changelog2manifest.length; i++) {
tikhomirov@403: if (changelog2manifest[i] == BAD_REVISION) {
tikhomirov@218: undefinedChangelogRevision.add(i);
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@218: for (int u : undefinedChangelogRevision) {
tikhomirov@423: Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
tikhomirov@423: // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
tikhomirov@423: // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
tikhomirov@423: if (manifest.isNull()) {
tikhomirov@490: repo.getSessionContext().getLog().dump(getClass(), Severity.Warn, "Changeset %d has no associated manifest entry", u);
tikhomirov@423: // keep -1 in the changelog2manifest map.
tikhomirov@423: } else {
tikhomirov@423: changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
tikhomirov@354: }
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@218: }
tikhomirov@415:
tikhomirov@415: /**
tikhomirov@415: * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
tikhomirov@415: */
tikhomirov@415: private static class FileLookupInspector implements RevlogStream.Inspector {
tikhomirov@415:
tikhomirov@426: private final Path filename;
tikhomirov@415: private final byte[] filenameAsBytes;
tikhomirov@415: private final IntMap csetIndex2FileRev;
tikhomirov@415: private final IntMap csetIndex2Flags;
tikhomirov@426: private final Inspector delegate;
tikhomirov@415:
tikhomirov@415: public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap csetIndex2FileRevMap, IntMap csetIndex2FlagsMap) {
tikhomirov@415: assert fileToLookUp != null;
tikhomirov@415: // need at least one map for the inspector to make any sense
tikhomirov@415: assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
tikhomirov@426: filename = fileToLookUp;
tikhomirov@426: filenameAsBytes = eh.toManifest(fileToLookUp.toString());
tikhomirov@426: delegate = null;
tikhomirov@415: csetIndex2FileRev = csetIndex2FileRevMap;
tikhomirov@415: csetIndex2Flags = csetIndex2FlagsMap;
tikhomirov@426: }
tikhomirov@426:
tikhomirov@426: public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, Inspector delegateInspector) {
tikhomirov@426: assert fileToLookUp != null;
tikhomirov@426: assert delegateInspector != null;
tikhomirov@426: filename = fileToLookUp;
tikhomirov@415: filenameAsBytes = eh.toManifest(fileToLookUp.toString());
tikhomirov@426: delegate = delegateInspector;
tikhomirov@426: csetIndex2FileRev = null;
tikhomirov@426: csetIndex2Flags = null;
tikhomirov@426: }
tikhomirov@426:
tikhomirov@426: void walk(int manifestRevIndex, RevlogStream content) {
tikhomirov@426: content.iterate(manifestRevIndex, manifestRevIndex, true, this);
tikhomirov@426: }
tikhomirov@426:
tikhomirov@426: void walk(int[] manifestRevIndexes, RevlogStream content) {
tikhomirov@426: content.iterate(manifestRevIndexes, true, this);
tikhomirov@415: }
tikhomirov@415:
tikhomirov@423: public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
tikhomirov@415: ByteArrayOutputStream bos = new ByteArrayOutputStream();
tikhomirov@415: try {
tikhomirov@415: byte b;
tikhomirov@415: while (!data.isEmpty() && (b = data.readByte()) != '\n') {
tikhomirov@415: if (b != 0) {
tikhomirov@415: bos.write(b);
tikhomirov@415: } else {
tikhomirov@415: byte[] byteArray = bos.toByteArray();
tikhomirov@415: bos.reset();
tikhomirov@415: if (Arrays.equals(filenameAsBytes, byteArray)) {
tikhomirov@426: Nodeid fileRev = null;
tikhomirov@426: Flags flags = null;
tikhomirov@426: if (csetIndex2FileRev != null || delegate != null) {
tikhomirov@415: byte[] nid = new byte[40];
tikhomirov@415: data.readBytes(nid, 0, 40);
tikhomirov@426: fileRev = Nodeid.fromAscii(nid, 0, 40);
tikhomirov@415: } else {
tikhomirov@415: data.skip(40);
tikhomirov@415: }
tikhomirov@426: if (csetIndex2Flags != null || delegate != null) {
tikhomirov@415: while (!data.isEmpty() && (b = data.readByte()) != '\n') {
tikhomirov@415: bos.write(b);
tikhomirov@415: }
tikhomirov@415: if (bos.size() == 0) {
tikhomirov@415: flags = Flags.RegularFile;
tikhomirov@415: } else {
tikhomirov@415: flags = Flags.parse(bos.toByteArray(), 0, bos.size());
tikhomirov@415: }
tikhomirov@426:
tikhomirov@426: }
tikhomirov@426: if (delegate != null) {
tikhomirov@426: assert flags != null;
tikhomirov@426: assert fileRev != null;
tikhomirov@426: delegate.begin(revisionNumber, Nodeid.fromBinary(nodeid, 0), linkRevision);
tikhomirov@426: delegate.next(fileRev, filename, flags);
tikhomirov@426: delegate.end(revisionNumber);
tikhomirov@426:
tikhomirov@426: } else {
tikhomirov@426: if (csetIndex2FileRev != null) {
tikhomirov@426: csetIndex2FileRev.put(linkRevision, fileRev);
tikhomirov@426: }
tikhomirov@426: if (csetIndex2Flags != null) {
tikhomirov@426: csetIndex2Flags.put(linkRevision, flags);
tikhomirov@426: }
tikhomirov@415: }
tikhomirov@415: break;
tikhomirov@415: } else {
tikhomirov@415: data.skip(40);
tikhomirov@415: }
tikhomirov@415: // else skip to the end of line
tikhomirov@415: while (!data.isEmpty() && (b = data.readByte()) != '\n')
tikhomirov@415: ;
tikhomirov@415: }
tikhomirov@415: }
tikhomirov@415: } catch (IOException ex) {
tikhomirov@423: throw new HgInvalidControlFileException("Failed reading manifest", ex, null);
tikhomirov@415: }
tikhomirov@415: }
tikhomirov@415: }
tikhomirov@2: }