Examples with HgContentRevision org.zmlx.hg4idea.HgContentRevision used on opensource projects

Example 1 with HgContentRevision

use of org.zmlx.hg4idea.HgContentRevision in project intellij-community by JetBrains.

the class HgMergeProvider method loadRevisions.

@NotNull
@Override
public MergeData loadRevisions(@NotNull final VirtualFile file) throws VcsException {
    final MergeData mergeData = new MergeData();
    final VcsRunnable runnable = new VcsRunnable() {

        @Override
        public void run() throws VcsException {
            final HgWorkingCopyRevisionsCommand command = new HgWorkingCopyRevisionsCommand(myProject);
            final VirtualFile repo = HgUtil.getHgRootOrThrow(myProject, file);
            final HgFile hgFile = new HgFile(myProject, file);
            HgRevisionNumber serverRevisionNumber;
            HgRevisionNumber localRevisionNumber;
            HgRevisionNumber baseRevisionNumber = null;
            // there are two possibilities: we have checked in local changes in the selected file or we didn't.
            if (wasFileCheckedIn(repo, file)) {
                // 1. We checked in.
                // We have a merge in progress, which means we have 2 heads (parents).
                // the second one is "their" revision pulled from the parent repo,
                // first parent is the local change.
                // to retrieve the base version we get the parent of the local change, i.e. the [only] parent of the first parent.
                //Which one is local revision depends on which one is merged with,
                // i.e if you update to 17 revision and then merge it with 23, so 17 is your local and 17->parent is your base revision.
                // This may produce misunderstanding when you update your project with merging (your update firstly to next revisions  and then
                // merge with previous). see http://hgbook.red-bean.com/read/managing-releases-and-branchy-development.html
                final Couple<HgRevisionNumber> parents = command.parents(repo, file);
                serverRevisionNumber = parents.second;
                localRevisionNumber = parents.first;
                final HgContentRevision local = HgContentRevision.create(myProject, hgFile, localRevisionNumber);
                mergeData.CURRENT = local.getContentAsBytes();
                // we are sure that we have a common ancestor, because otherwise we'll get "repository is unrelated" error while pulling,
                // due to different root changesets which is prohibited.
                // Find common ancestor of two revisions : hg debugancestor rev1 rev2
                // Using quotes may produce wrong escaping errors on Unix-type systems
                List<String> arguments = new ArrayList<>();
                String localChangeset = localRevisionNumber.getChangeset();
                String serverChangeset = serverRevisionNumber.getChangeset();
                arguments.add(StringUtil.isEmptyOrSpaces(localChangeset) ? localRevisionNumber.getRevision() : localChangeset);
                arguments.add(StringUtil.isEmptyOrSpaces(serverChangeset) ? serverRevisionNumber.getRevision() : serverChangeset);
                HgCommandResult result = new HgPromptCommandExecutor(myProject).executeInCurrentThread(repo, "debugancestor", arguments);
                if (result != null) {
                    String output = result.getRawOutput();
                    final List<String> parts = StringUtil.split(output, ":");
                    if (parts.size() < 2) {
                        LOG.info("Couldn't parse result of debugancestor command execution " + arguments);
                        new HgCommandResultNotifier(myProject).notifyError(null, HgVcsMessages.message("hg4idea.error.debugancestor.command.execution"), HgVcsMessages.message("hg4idea.error.debugancestor.command.description"));
                    } else {
                        baseRevisionNumber = HgRevisionNumber.getInstance(parts.get(0), parts.get(1));
                    }
                } else {
                    LOG.info(HgVcsMessages.message("hg4idea.error.debugancestor.command.execution") + arguments);
                    new HgCommandResultNotifier(myProject).notifyError(null, HgVcsMessages.message("hg4idea.error.debugancestor.command.execution"), HgVcsMessages.message("hg4idea.error.debugancestor.command.description"));
                }
            } else {
                // 2. local changes are not checked in.
                // then there is only one parent, which is server changes.
                // local changes are retrieved from the file system, they are not in the Mercurial yet.
                // base is the only parent of server changes.
                serverRevisionNumber = command.parents(repo, file).first;
                baseRevisionNumber = command.parents(repo, file, serverRevisionNumber).first;
                final File origFile = new File(file.getPath() + ".orig");
                mergeData.CURRENT = VcsUtil.getFileByteContent(origFile);
            }
            if (baseRevisionNumber != null) {
                final HgContentRevision base = HgContentRevision.create(myProject, hgFile, baseRevisionNumber);
                //if file doesn't exist in ancestor revision the base revision should be empty
                mergeData.ORIGINAL = base.getContent() != null ? base.getContentAsBytes() : ArrayUtil.EMPTY_BYTE_ARRAY;
            } else {
                // no base revision means that the file was added simultaneously with different content in both repositories
                mergeData.ORIGINAL = ArrayUtil.EMPTY_BYTE_ARRAY;
            }
            final HgContentRevision server = HgContentRevision.create(myProject, hgFile, serverRevisionNumber);
            mergeData.LAST = server.getContentAsBytes();
            file.refresh(false, false);
        }
    };
    VcsUtil.runVcsProcessWithProgress(runnable, VcsBundle.message("multiple.file.merge.loading.progress.title"), false, myProject);
    return mergeData;
}