Attempt to build all books

Modifies tools/validate.py to run "mvn clean generate-sources"
in every directory that has a pom.xml file.

The script will fail with an error if any of the books fail to build.
It will terminate on the first failure.

Fixes bug 1031374

For now, we aren't gating on openstack-training

Change-Id: Ic0136e4245e8e4bfa2e790574e3ec82c944c4b02

validate.py

@@ -4,14 +4,18 @@
 Usage:
     validate.py [path]
 
-Validates all xml files against the DocBook 5 RELAX NG schema.
+Validates all xml files against the DocBook 5 RELAX NG schema, and
+attempts to build all books.
 
 Options:
     path     Root directory, defaults to <repo root>/doc/src/doc/docbkx
 
 Ignores pom.xml files and subdirectories named "target".
 
-Requires Python 2.7 or greater (for argparse) and the lxml Python library.
+Requires:
+    - Python 2.7 or greater (for argparse)
+    - lxml Python library
+    - Maven
 
 '''
 from lxml import etree
@@ -23,7 +27,10 @@ import sys
 import urllib2
 
 # These are files that are known to not be in DocBook format
-EXCEPTIONS = ['ha-guide-docinfo.xml']
+FILE_EXCEPTIONS = ['ha-guide-docinfo.xml']
+
+# These are books that we aren't checking yet
+BOOK_EXCEPTIONS = ['openstack-training']
 
 
 def get_schema():
@@ -67,7 +74,7 @@ def error_message(error_log):
     return "\n".join(errs)
 
 
-def main(rootdir):
+def validate_individual_files(rootdir, exceptions):
     schema = get_schema()
 
     any_failures = False
@@ -82,7 +89,8 @@ def main(rootdir):
 
         for f in files:
             # Ignore maven files, which are called pom.xml
-            if f.endswith('.xml') and f != 'pom.xml' and f not in EXCEPTIONS:
+            if f.endswith('.xml') and f != 'pom.xml' \
+                                  and f not in exceptions:
                 try:
                     path = os.path.abspath(os.path.join(root, f))
                     doc = etree.parse(path)
@@ -100,6 +108,25 @@ def main(rootdir):
         if any_failures:
             sys.exit(1)
 
+def build_all_books(rootdir, exceptions):
+    """ Build all of the books.
+
+    Looks for all directories with "pom.xml" in them and runs
+    "mvn clean generate-sources" in that directory.
+
+    This will throw an exception if a book fails to build
+    """
+    for root, dirs, files in os.walk(rootdir):
+        book = os.path.basename(root)
+        if ("pom.xml" in files) and (book not in exceptions):
+            print "Building %s" % book
+            os.chdir(root)
+            subprocess.check_call(["mvn", "clean", "generate-sources"])
+
+def main(rootdir):
+    validate_individual_files(rootdir, FILE_EXCEPTIONS)
+    build_all_books(rootdir, BOOK_EXCEPTIONS)
+
 
 def default_root():
     """Return the location of openstack-manuals/doc/src/docbkx