feat(#1602): default empty versions near to the root object

eo-maven-plugin/src/main/java/org/eolang/maven/ParseMojo.java

@@ -158,7 +158,8 @@ private void parse(final ForeignTojo tojo) throws IOException {
                 new Syntax(
                     name,
                     new InputOf(source),
-                    new OutputTo(baos)
+                    new OutputTo(baos),
+                    this.withVersions
                 ).parse();
                 final String parsed = new XMLDocument(
                     new Xembler(

eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java

@@ -34,6 +34,7 @@
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.io.TempDir;
@@ -57,6 +58,18 @@
  *  check here is related to particular mojos (and we should check their
  *  behaviour in appropriate tests). In other words there are integration tests
  *  here. And, probably, it is not the best place for them.
+ * @todo #1602:30min Enable tests related to object versioning. The main concept of object
+ *  versioned was changed: now we don't add suffix with version to object, but want to make version
+ *  as prefix (before org.eolang) so it would be transpiled to {@link org.eolang.PhPackage}. Need
+ *  either to refactor tests or remove them after object versioning is implemented. Tests are:
+ *  - {@link AssembleMojoTest#assemblesTogetherWithVersions}
+ *  - {@link DiscoverMojoTest#discoversWithVersions}
+ *  - {@link DiscoverMojoTest#discoversWithSeveralObjectsWithDifferentVersions}
+ *  - {@link DiscoverMojoTest#discoversDifferentUnversionedObjectsFromDifferentVersionedObjects}
+ *  - {@link ProbeMojoTest#findsProbesWithVersionsInDifferentObjectionaries}
+ *  - {@link ProbeMojoTest#findsProbesWithVersionsInOneObjectionary}
+ *  - {@link PullMojoTest#pullsProbedVersionedObjectsFromDifferentObjectionaries}
+ *  - {@link PullMojoTest#pullsProbedVersionedObjectFromOneObjectionary}
  */
 @ExtendWith(OnlineCondition.class)
 final class AssembleMojoTest {
@@ -116,6 +129,7 @@ void assemblesTogether(@TempDir final Path temp) throws IOException {
     }
 
     @Test
+    @Disabled
     void assemblesTogetherWithVersions(@TempDir final Path temp) throws Exception {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();
         final CommitHash master = hashes.get("master");

eo-maven-plugin/src/test/java/org/eolang/maven/DiscoverMojoTest.java

@@ -42,6 +42,7 @@
 import org.eolang.maven.tojos.ForeignTojos;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -114,6 +115,7 @@ void discoversForDifferentScopes(@TempDir final Path tmp) throws IOException {
     }
 
     @Test
+    @Disabled
     void discoversWithVersions(@TempDir final Path tmp) throws IOException {
         final FakeMaven maven = new FakeMaven(tmp)
             .with("withVersions", true)
@@ -140,6 +142,7 @@ void discoversWithVersions(@TempDir final Path tmp) throws IOException {
     }
 
     @Test
+    @Disabled
     void discoversWithSeveralObjectsWithDifferentVersions(
         @TempDir final Path tmp
     ) throws IOException {
@@ -177,6 +180,7 @@ void discoversWithSeveralObjectsWithDifferentVersions(
     }
 
     @Test
+    @Disabled
     void discoversDifferentUnversionedObjectsFromDifferentVersionedObjects(@TempDir final Path tmp)
         throws IOException {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();

eo-maven-plugin/src/test/java/org/eolang/maven/ProbeMojoTest.java

@@ -44,6 +44,7 @@
 import org.eolang.maven.util.Home;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.io.TempDir;
@@ -147,6 +148,7 @@ void findsProbesInOyRemote(@TempDir final Path temp) throws IOException {
 
     @Test
     @ExtendWith(OnlineCondition.class)
+    @Disabled
     void findsProbesWithVersionsInOneObjectionary(@TempDir final Path temp) throws IOException {
         final CommitHash hash = new CommitHashesMap.Fake().get("0.28.5");
         final FakeMaven maven = new FakeMaven(temp)
@@ -177,6 +179,7 @@ void findsProbesWithVersionsInOneObjectionary(@TempDir final Path temp) throws I
 
     @Test
     @ExtendWith(OnlineCondition.class)
+    @Disabled
     void findsProbesWithVersionsInDifferentObjectionaries(@TempDir final Path temp)
         throws IOException {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();

eo-maven-plugin/src/test/java/org/eolang/maven/PullMojoTest.java

@@ -45,6 +45,7 @@
 import org.eolang.maven.util.Home;
 import org.hamcrest.MatcherAssert;
 import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.api.io.TempDir;
@@ -191,6 +192,7 @@ void pullsVersionedObjectSuccessfully(@TempDir final Path temp) throws IOExcepti
     }
 
     @Test
+    @Disabled
     void pullsProbedVersionedObjectFromOneObjectionary(@TempDir final Path temp)
         throws IOException {
         new FakeMaven(temp)
@@ -216,6 +218,7 @@ void pullsProbedVersionedObjectFromOneObjectionary(@TempDir final Path temp)
     }
 
     @Test
+    @Disabled
     void pullsProbedVersionedObjectsFromDifferentObjectionaries(@TempDir final Path temp)
         throws IOException {
         final Map<String, CommitHash> hashes = new CommitHashesMap.Fake();

eo-parser/src/main/java/org/eolang/parser/CheckPack.java

@@ -72,10 +72,12 @@ public Collection<String> failures() throws IOException {
         final Map<String, Object> map = yaml.load(this.script);
         final ByteArrayOutputStream baos = new ByteArrayOutputStream();
         final String src = map.get("eo").toString();
+        final boolean versioned = map.containsKey("versioned");
         new Syntax(
             "scenario",
             new InputOf(String.format("%s\n", src)),
-            new OutputTo(baos)
+            new OutputTo(baos),
+            versioned
         ).parse();
         final XML xml = new XMLDocument(baos.toByteArray());
         baos.reset();

eo-parser/src/main/java/org/eolang/parser/Objects.java

@@ -34,6 +34,7 @@
  * Object tree.
  * @since 0.1
  */
+@SuppressWarnings("PMD.TooManyMethods")
 interface Objects extends Iterable<Directive> {
 
     /**
@@ -69,6 +70,18 @@ interface Objects extends Iterable<Directive> {
      */
     void xprop(String key, Object xpath);
 
+    /**
+     * Optional property.
+     * Add property depends on given condition.
+     * @param condition Condition
+     * @param key Key
+     * @todo #2503:30min Remove the method. This method is temporary used in {@link XeListener}
+     *  while implementing object versioning feature. When it's done - need to remove it and replace
+     *  all its occurrences in {@link XeListener} with {@code prop} method calls. Also need to
+     *  remove {@code versioned} field from {@link XeListener} since it won't be used anymore.
+     */
+    void oprop(boolean condition, String key);
+
     /**
      * Enter last object.
      */
@@ -136,6 +149,13 @@ public void xprop(final String key, final Object xpath) {
             this.dirs.xattr(key, xpath);
         }
 
+        @Override
+        public void oprop(final boolean condition, final String key) {
+            if (condition) {
+                this.prop(key);
+            }
+        }
+
         @Override
         public void enter() {
             this.dirs.xpath("o[last()]").strict(1);

eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java

@@ -27,11 +27,14 @@
 import com.jcabi.xml.XSL;
 import com.jcabi.xml.XSLDocument;
 import com.yegor256.xsline.StAfter;
+import com.yegor256.xsline.StEndless;
 import com.yegor256.xsline.StLambda;
 import com.yegor256.xsline.StSequence;
 import com.yegor256.xsline.TrClasspath;
+import com.yegor256.xsline.TrDefault;
 import com.yegor256.xsline.TrEnvelope;
 import com.yegor256.xsline.TrFast;
+import com.yegor256.xsline.TrJoined;
 import com.yegor256.xsline.TrLambda;
 import com.yegor256.xsline.TrLogged;
 import java.util.logging.Level;
@@ -44,13 +47,21 @@
 public final class ParsingTrain extends TrEnvelope {
 
     /**
-     * Apply changes to each XML after processing.
+     * Apply changes to each XML after processing each shift.
      */
     private static final XSL EACH = new XSLDocument(
         ParsingTrain.class.getResourceAsStream("_each.xsl"),
         "each.xsl"
     ).with(new ClasspathSources(ParsingTrain.class));
 
+    /**
+     * Apply changes to each XML after processing all shifts.
+     */
+    private static final XSL VERSIONS = new XSLDocument(
+        ParsingTrain.class.getResourceAsStream("move-versions-deeper.xsl"),
+        "move-versions-deeper.xsl"
+    ).with(new ClasspathSources(ParsingTrain.class));
+
     /**
      * Sheets in the right order.
      */
@@ -110,34 +121,41 @@ public ParsingTrain() {
      */
     ParsingTrain(final String... sheets) {
         super(
-            new TrLambda(
-                new TrFast(
-                    new TrLambda(
-                        new TrLogged(
-                            new TrClasspath<>(sheets).back(),
-                            ParsingTrain.class,
-                            Level.FINEST
+            new TrJoined<>(
+                new TrLambda(
+                    new TrFast(
+                        new TrLambda(
+                            new TrLogged(
+                                new TrClasspath<>(sheets).back(),
+                                ParsingTrain.class,
+                                Level.FINEST
+                            ),
+                            StEoLogged::new
                         ),
-                        StEoLogged::new
+                        TrFast.class,
+                        500L
                     ),
-                    TrFast.class,
-                    500L
-                ),
-                shift -> new StSequence(
-                    shift.uid(),
-                    xml -> xml.nodes("//error[@severity='critical']").isEmpty(),
-                    new StAfter(
-                        shift,
-                        new StLambda(
-                            shift::uid,
-                            (pos, xml) -> ParsingTrain.EACH.with("step", pos)
-                                .with("sheet", shift.uid())
-                                .transform(xml)
+                    shift -> new StSequence(
+                        shift.uid(),
+                        xml -> xml.nodes("//error[@severity='critical']").isEmpty(),
+                        new StAfter(
+                            shift,
+                            new StLambda(
+                                shift::uid,
+                                (pos, xml) -> ParsingTrain.EACH
+                                    .with("step", pos)
+                                    .with("sheet", shift.uid())
+                                    .transform(xml)
+                            )
                         )
                     )
+                ),
+                new TrDefault<>(
+                    new StEndless(
+                        new StLambda(ParsingTrain.VERSIONS::transform)
+                    )
                 )
             )
         );
     }
-
 }

eo-parser/src/main/java/org/eolang/parser/Syntax.java

@@ -76,22 +76,43 @@ public final class Syntax {
      */
     private final Output target;
 
+    /**
+     * Add versions to all objects or not.
+     */
+    private final boolean versioned;
+
     /**
      * Ctor.
-     *
      * @param nme The name of it
      * @param ipt Input text
      * @param tgt Target
-     * @checkstyle ParameterNumberCheck (10 lines)
      */
     public Syntax(
         final String nme,
         final Input ipt,
         final Output tgt
+    ) {
+        this(nme, ipt, tgt, false);
+    }
+
+    /**
+     * Ctor.
+     * @param nme The name of it
+     * @param ipt Input text
+     * @param tgt Target
+     * @param versioned Add versions to all objects or not
+     * @checkstyle ParameterNumberCheck (10 lines)
+     */
+    public Syntax(
+        final String nme,
+        final Input ipt,
+        final Output tgt,
+        final boolean versioned
     ) {
         this.name = nme;
         this.input = ipt;
         this.target = tgt;
+        this.versioned = versioned;
     }
 
     /**
@@ -114,7 +135,7 @@ public void parse() throws IOException {
         );
         parser.removeErrorListeners();
         parser.addErrorListener(spy);
-        final XeListener xel = new XeListener(this.name);
+        final XeListener xel = new XeListener(this.name, this.versioned);
         new ParseTreeWalker().walk(xel, parser.program());
         final XML dom = new XMLDocument(
             new Xembler(