astropy · eteq · Dec 16, 2014 · Dec 1, 2014 · Dec 3, 2014 · Dec 3, 2014
diff --git a/.travis.yml b/.travis.yml
@@ -79,7 +79,7 @@ install:
     - export CONDA_INSTALL="conda install -c astropy-ci-extras --yes python=$TRAVIS_PYTHON_VERSION numpy=$NUMPY_VERSION"
 
     # CORE DEPENDENCIES
-    - if [[ $SETUP_CMD == test* || $SETUP_CMD == build_sphinx* ]]; then $CONDA_INSTALL pytest pip Cython psutil; fi
+    - if [[ $SETUP_CMD == test* || $SETUP_CMD == build_sphinx* ]]; then $CONDA_INSTALL pytest pip Cython jinja2 psutil; fi
 
     # OPTIONAL DEPENDENCIES
     - if $OPTIONAL_DEPS; then $CONDA_INSTALL scipy h5py; fi

diff --git a/CHANGES.rst b/CHANGES.rst
@@ -458,6 +458,10 @@ Other Changes and Additions
 - The list of modules displayed in the pytest header can now be customized.
   [#3157]
 
+- `jinja2 <http://jinja.pocoo.org/docs/dev/>`_ is now required to build the
+  source code from the git repository, in order to allow the ERFA wrappers to
+  be generated. [#3166]
+
 0.4.3 (unreleased)
 ------------------
 

diff --git a/astropy/erfa/cython_generator.py b/astropy/erfa/cython_generator.py
@@ -335,9 +335,14 @@ def __repr__(self):
 
 
 
-def main(srcdir, outfn, templateloc):
+def main(srcdir, outfn, templateloc, verbose=True):
     from jinja2 import Environment, FileSystemLoader
 
+    if verbose:
+        print_ = lambda *args, **kwargs: print(*args, **kwargs)
+    else:
+        print_ = lambda *args, **kwargs: None
+
     #Prepare the jinja2 templating environment
     env = Environment(loader=FileSystemLoader(templateloc))
 
@@ -369,11 +374,11 @@ def surround(a_list, pre, post):
     section_subsection_functions = re.findall('/\* (\w*)/(\w*) \*/\n(.*?)\n\n',
                                               erfa_h, flags=re.DOTALL|re.MULTILINE)
     for section, subsection, functions in section_subsection_functions:
-        print("{0}.{1}".format(section, subsection))
+        print_("{0}.{1}".format(section, subsection))
         if section == "Astronomy":
             func_names = re.findall(' (\w+)\(.*?\);', functions, flags=re.DOTALL)
             for name in func_names:
-                print("{0}.{1}.{2}...".format(section, subsection, name))
+                print_("{0}.{1}.{2}...".format(section, subsection, name))
                 if multifilserc:
                     # easy because it just looks in the file itself
                     funcs.append(Function(name, srcdir))
@@ -398,18 +403,18 @@ def surround(a_list, pre, post):
                                          "spawned it.  This should be "
                                          "impossible!")
 
-    print("Rendering template")
+    print_("Rendering template")
     erfa_pyx = erfa_pyx_in.render(funcs=funcs)
     erfa_py  = erfa_py_in.render(funcs=funcs)
 
     if outfn is not None:
-        print("Saving to", outfn)
+        print_("Saving to", outfn)
         with open(outfn, "w") as f:
             f.write(erfa_py)
         with open(outfn+"x", "w") as f:
             f.write(erfa_pyx)
 
-    print("Done!")
+    print_("Done!")
 
     return erfa_pyx, funcs
 
@@ -433,6 +438,8 @@ def surround(a_list, pre, post):
                     default=DEFAULT_TEMPLATE_LOC,
                     help='the location where the "erfa.pyx.templ" '
                          'template can be found.')
+    ap.add_argument('-q', '--quiet', action='store_false', dest='verbose',
+                    help='Suppress output normally printed to stdout.')
 
     args = ap.parse_args()
     main(args.srcdir, args.output, args.template_loc)