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diff --git a/tests/cvs-incremental.script b/tests/cvs-incremental.script
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+#!/bin/sh
+#
+# Tests converting a simple CVS repository to git.
+#
+# Copyright (C) 2012, 2020  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+set -e
+
+logfile="$DATADIR/cvs-test-repo.log"
+workdir="$DATADIR/work-dir"
+workingcopy="$DATADIR/cvs-test-checkout"
+
+repo="$DATADIR/cvs-test-repo"
+export CVSROOT="$repo"
+
+normalize() {
+    sed -r -e '/hooks\/.*\.sample/d' \
+           -e "s/pack-[0-9a-z]+\.(idx|pack)$/pack-file/" \
+           -e "/\/objects\/info\/commit-graph$/d" \
+           -e "/\/objects\/pack\/pack-[0-9a-z]+\.bitmap$/d" \
+           -e "/\/\.cvsps\//d" \
+           -e "s|$DATADIR|DATADIR|g" "$@"
+}
+
+# CVS wants $USER, $LOGNAME, and $LOGNAME set to a real username.
+export USER=root
+export LOGNAME=$USER
+export USERNAME=$USER
+
+"${SRCDIR}/test-lorry" --pull-only --log="$logfile" --working-area="$workdir" \
+  "$DATADIR/cvs-test-repo.lorry" > /dev/null
+
+(
+  cd "$workingcopy/CVSROOT"
+
+  # ensure that this commit has a later timestamp than the last one
+  sleep 1
+
+  # append to the test file
+  echo "second line" >> test.txt
+
+  # make a commit
+  cvs -Q commit -m "second commit"
+)
+
+"${SRCDIR}/test-lorry" --pull-only --log="$logfile" --working-area="$workdir" \
+  "$DATADIR/cvs-test-repo.lorry" > /dev/null
+
+# verify that the git repository was created successfully
+(
+  cd "$workdir/cvs-test-repo/git-b/"
+
+  echo "branches:"
+  git show-ref | cut -d' ' -f2 | LC_ALL=C sort
+
+  echo "test file:"
+  git cat-file blob master:test.txt
+
+  echo "commit messages:"
+  git log --pretty='%s' master
+)
+
+find "$workdir/cvs-test-repo" | LC_ALL=C sort | normalize