Add ability to make a galaxy-lib dep-free version of this Pulsar.

For inclusion with galaxy.

Makefile

@@ -99,9 +99,11 @@ lint-docs: ready-docs
 	if [ -f .venv/bin/activate ]; then . .venv/bin/activate; fi; $(MAKE) -C docs clean
 	if [ -f .venv/bin/activate ]; then . .venv/bin/activate; fi; ! (make -C docs html 2>&1 | grep -v 'nonlocal image URI found\|included in any toctree' | grep WARNING)
 
-open-docs: docs
+_open-docs:
 	open docs/_build/html/index.html || xdg-open docs/_build/html/index.html
 
+open-docs: docs _open-docs
+
 open-rtd: docs
 	open $(DOC_URL) || xdg-open $(PROJECT_URL)
 
@@ -112,11 +114,13 @@ dist: clean
 	$(IN_VENV) python setup.py sdist bdist_egg bdist_wheel
 	ls -l dist
 
-release-test-artifacts: dist
+_release-test-artifacts:
 	$(IN_VENV) twine upload -r test dist/*
 	open https://testpypi.python.org/pypi/$(PROJECT_NAME) || xdg-open https://testpypi.python.org/pypi/$(PROJECT_NAME)
 
-release-aritfacts: release-test-artifacts
+release-test-artifacts: dist _release-test-artifacts
+
+_release-aritfacts: release-test-artifacts
 	@while [ -z "$$CONTINUE" ]; do \
 	  read -r -p "Have you executed release-test and reviewed results? [y/N]: " CONTINUE; \
 	done ; \
@@ -124,6 +128,8 @@ release-aritfacts: release-test-artifacts
 	@echo "Releasing"
 	$(IN_VENV) twine upload dist/*
 
+release-aritfacts: release-test-artifacts _release-aritfacts
+
 commit-version:
 	$(IN_VENV) python $(BUILD_SCRIPTS_DIR)/commit_version.py $(SOURCE_DIR) $(VERSION)
 
@@ -140,3 +146,11 @@ release: release-local push-release
 
 add-history:
 	$(IN_VENV) python $(BUILD_SCRIPTS_DIR)/bootstrap_history.py $(ITEM)
+
+dist-lib: clean
+	$(IN_VENV) PULSAR_GALAXY_LIB=1 python setup.py sdist bdist_egg bdist_wheel
+	ls -l dist
+
+release-test-lib-artifacts: dist-lib _release-test-artifacts
+
+release-lib-aritfacts: release-test-lib-artifacts _release-aritfacts

setup.py

+import os
 import re
 import ast
 import sys
@@ -14,6 +15,9 @@ try:
 except ImportError:
     from distutils.core import setup
 
+# Set environment variable to 1 to build as library for Galaxy instead
+# of as stand-alone app.
+PULSAR_GALAXY_LIB = os.environ.get("PULSAR_GALAXY_LIB", "0") == "1"
 
 readme = open('README.rst').read()
 history = open('HISTORY.rst').read().replace('.. :changelog:', '')
@@ -23,9 +27,12 @@ requirements = [
     'webob',
     'psutil',
     'pyyaml',
-    'galaxy-lib',
 ]
 
+if not PULSAR_GALAXY_LIB:
+    requirements.append("galaxy-lib")
+
+# TODO: use extra_requires here to be more correct.
 if sys.version_info[0] == 2:
     requirements.append('PasteScript')
     requirements.append('paste')
@@ -46,8 +53,10 @@ if is_windows:
 else:
     scripts = ["scripts/pulsar"]
 
+name = "pulsar-app" if not PULSAR_GALAXY_LIB else "pulsar-galaxy-lib"
+
 setup(
-    name='pulsar-app',
+    name=name,
     version=version,
     description='Distributed job execution application built for Galaxy (http://galaxyproject.org/).',
     long_description=readme + '\n\n' + history,