Merge branch 'units' of github.com:younies/icu into units

diff --cc tools/cldr/cldr-to-icu/src/main/java/org/unicode/icu/tool/cldrtoicu/LdmlConverter.java
index cb37077b57977bbc5ccabb421a4e3e79104fd5aa,c43143e70c63a0af7e5bc5cb36dbd9a2d7829038..b1782c4ab24f850f78c97d6776c335a4cf7e5a77
--- 1/tools/cldr/cldr-to-icu/src/main/java/org/unicode/icu/tool/cldrtoicu/LdmlConverter.java
--- 2/tools/cldr/cldr-to-icu/src/main/java/org/unicode/icu/tool/cldrtoicu/LdmlConverter.java
+++ b/tools/cldr/cldr-to-icu/src/main/java/org/unicode/icu/tool/cldrtoicu/LdmlConverter.java
@@@ -267,14 -272,13 +272,18 @@@ public final class LdmlConverter 
                  .filter(t -> t.getCldrType() == LDML)
                  .flatMap(t -> TYPE_TO_DIR.get(t).stream())
                  .collect(toImmutableList());
 +        if (splitDirs.isEmpty()) {
 +            return;
 +        }
 +
 +        String cldrVersion = config.getCldrVersion();
  
+         if (splitDirs.isEmpty()) {
+             return;
+         }
+ 
          Map<IcuLocaleDir, DependencyGraph> graphMetadata = new HashMap<>();
 -        splitDirs.forEach(d -> graphMetadata.put(d, new DependencyGraph()));
 +        splitDirs.forEach(d -> graphMetadata.put(d, new DependencyGraph(cldrVersion)));
  
          SetMultimap<IcuLocaleDir, String> writtenLocaleIds = HashMultimap.create();
          Path baseDir = config.getOutputDir();