Add versioned option

Signed-off-by: Yohanna Lisnichuk <yohanitalisnichuk@gmail.com>

README.rst

@@ -78,6 +78,15 @@ Reads release packages from standard input, merges the releases by OCID, and pri
 
     cat tests/fixtures/realdata/release-package-1.json | ocdskit compile > out.json
 
+versioned
+~~~~~~~
+
+Reads release packages from standard input, merges the releases by OCID, and prints the versioned releases.
+
+::
+
+    cat tests/fixtures/realdata/release-package-1.json | ocdskit versioned > out.json
+
 tabulate
 ~~~~~~~~
 

ocdskit/cli/__main__.py

@@ -12,6 +12,7 @@
     'ocdskit.cli.commands.combine_record_packages',
     'ocdskit.cli.commands.combine_release_packages',
     'ocdskit.cli.commands.compile',
+    'ocdskit.cli.commands.versioned',
     'ocdskit.cli.commands.indent',
     'ocdskit.cli.commands.mapping_sheet',
     'ocdskit.cli.commands.measure',

ocdskit/cli/commands/versioned.py

@@ -0,0 +1,23 @@
+import json
+from collections import defaultdict, OrderedDict
+
+import ocdsmerge
+
+from .base import BaseCommand
+
+
+class Command(BaseCommand):
+    name = 'versioned'
+    help = 'reads release packages from standard input, merges the releases by OCID, and prints the versioned releases'
+
+    def handle(self):
+        releases_by_ocid = defaultdict(list)
+
+        for line in self.buffer():
+            release_package = json.loads(line, object_pairs_hook=OrderedDict)
+            for release in release_package['releases']:
+                releases_by_ocid[release['ocid']].append(release)
+
+        for releases in releases_by_ocid.values():
+            compiled_release = ocdsmerge.merge_versioned(releases)
+            self.print(compiled_release)