Script and makefile adjustments for updating extlib

Makefile.in

@@ -80,7 +80,7 @@ endif
 
 .PHONY: all install uninstall distclean info install-html html \
 install-pdf pdf install-dvi dvi install-ps ps clean dist check \
-installdirs i18n virtualenv docs
+installdirs i18n virtualenv docs extlib
 
 # update postgresql
 
@@ -93,6 +93,11 @@ else
 	cd docs && make html
 endif
 
+# In the future we may provide more options than just npm/bower here
+# eg, we may support guix updating.
+extlib:
+	./devtools/update_extlib.sh
+
 develop: $(maybe_venv_dep) i18n mediagoblin.ini
 
 # NEVER clobber a user's mediagoblin.ini once they've defined it
@@ -116,7 +121,7 @@ ifneq ($(VIRTUALENV),no)
 	virtualenv --system-site-packages --python=$(PYTHON) .
 	./bin/python setup.py develop --upgrade
 
-virtualenv: bin/python
+virtualenv: bin/python extlib
 
 clean-virtualenv:
 	rm -rf ./bin/
@@ -164,7 +169,7 @@ distclean: $(maybe_venv_clean)
 
 
 # You can either use the setup.py sdist command or you can roll your own here
-dist:
+dist: extlib
 #	$(maybe_venved_python) setup.py sdist
 	mkdir $(PACKAGE_DISTNAME)
 	cp -r $(DISTFILES) $(PACKAGE_DISTNAME)

devtools/update_extlib.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2015 GNU MediaGoblin Contributors.  See AUTHORS.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+set -e
+
+# Make sure we have npm available
+
+if ! which npm > /dev/null; then
+    echo "Can't find npm, no way to install extlib :(";
+    exit 1;
+fi
+
+# Install bower if need be
+if which bower > /dev/null; then
+    BOWER=`which bower`;
+elif [ -f ./node_modules/.bin/bower ]; then
+    BOWER="./node_modules/.bin/bower";
+else
+    echo "Bower not found, installing via npm!";
+    npm install bower;
+    BOWER="./node_modules/.bin/bower";
+fi
+
+# Do package/file installs
+$BOWER install