dev@desktop5  ~/swh-environment/swh-graph   master  cat logging.properties 
logback.configurationFile=logback.xml
handlers = java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = CRITICAL
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.SimpleFormatter.format = XXXX [%1$tc] 4$s: %2$s - %5$s %6$s%n
 dev@desktop5  ~/swh-environment/swh-graph   master  cat logback.xml 
<configuration>

  <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>XXXX %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} -%kvp- %msg%n</pattern>
    </encoder>
  </appender>
</configuration>
 dev@desktop5  ~/swh-environment/swh-graph   master  java -Djava.util.logging.config.file=logging.properties -Dlogback.configurationFile=logback.xml -cp java/target/swh-graph-2.2.0.jar org.softwareheritage.graph.utils.TopoSort swh/graph/tests/dataset/compressed/example rev,rel,snp,ori
Loading graph swh/graph/tests/dataset/compressed/example ...
14:30:58.754 [main] WARN  it.unimi.dsi.big.webgraph.BVGraph - A cached long big list of offsets was found, but the corresponding offsets file has a later modification time
14:30:58.770 [main] WARN  it.unimi.dsi.big.webgraph.BVGraph - A cached long big list of offsets was found, but the corresponding offsets file has a later modification time
Selecting subgraphs.
Graph loaded.
Listing leaves.
Leaves loaded, starting DFS.
SWHID,ancestors,successors,sample_ancestor1,sample_ancestor2
swh:1:rev:0000000000000000000000000000000000000003,0,1,,
swh:1:rev:0000000000000000000000000000000000000009,1,4,swh:1:rev:0000000000000000000000000000000000000003,
swh:1:rev:0000000000000000000000000000000000000013,1,1,swh:1:rev:0000000000000000000000000000000000000009,
swh:1:rev:0000000000000000000000000000000000000018,1,2,swh:1:rev:0000000000000000000000000000000000000013,
swh:1:rel:0000000000000000000000000000000000000019,1,0,swh:1:rev:0000000000000000000000000000000000000018,
swh:1:rel:0000000000000000000000000000000000000021,1,1,swh:1:rev:0000000000000000000000000000000000000018,
swh:1:rel:0000000000000000000000000000000000000010,1,2,swh:1:rev:0000000000000000000000000000000000000009,
swh:1:snp:0000000000000000000000000000000000000020,2,1,swh:1:rev:0000000000000000000000000000000000000009,swh:1:rel:0000000000000000000000000000000000000010
swh:1:ori:83404f995118bd25774f4ac14422a8f175e7a054,1,0,swh:1:snp:0000000000000000000000000000000000000020,
swh:1:snp:0000000000000000000000000000000000000022,3,1,swh:1:rev:0000000000000000000000000000000000000009,swh:1:rel:0000000000000000000000000000000000000010
swh:1:ori:8f50d3f60eae370ddbf85c86219c55108a350165,1,0,swh:1:snp:0000000000000000000000000000000000000022,