bumping version and adding CLI for version (jupyter-book#242)

bumping version and adding CLI for version

jupyter_book/__init__.py

@@ -1,2 +1,2 @@
 """Build an online book using Jupyter Notebooks and Jekyll."""
-__version__ = "0.5.2dev0"
+__version__ = "0.5.2"

jupyter_book/commands/__init__.py

@@ -3,3 +3,4 @@
 from .create import create
 from .upgrade import upgrade
 from .run import run
+from .version import version

jupyter_book/commands/version.py

@@ -0,0 +1,9 @@
+import sys
+import argparse
+from jupyter_book import __version__
+
+def version():
+    parser = argparse.ArgumentParser(
+        description="Print the version of Jupyter Book currently in-use.")
+
+    print("Running Jupyter Book version: {}".format(__version__))

jupyter_book/main.py

@@ -1,7 +1,7 @@
 import sys
 import argparse
 
-from .commands import build, create, upgrade
+from .commands import build, create, upgrade, version
 from .run import run_book
 from .toc import build_toc
 
@@ -12,7 +12,8 @@
             'build': build,
             'upgrade': upgrade,
             'run': run_book,
-            'toc': build_toc}
+            'toc': build_toc,
+            'version': version}
 parser = argparse.ArgumentParser(description=DESCRIPTION)
 parser.add_argument("command", help="The command you'd like to run. Allowed commands: {}".format(
     list(commands.keys())))