Simplify package versioning

Add VERSION file containing the version string, e.g. 0.1.3, which will
be read in setup.py and securedrop_proxy/version.py. Now we just have
to remember to update the package version in one place.

Add a test making sure that the proxy reports the same version used in
setup.py.

MANIFEST.in

@@ -1,9 +1,10 @@
-include securedrop_proxy/*.py
-include requirements.txt
-include README.md
 include LICENSE
-include setup.py
 include Pipfile
 include Pipfile.lock
-include qubes/securedrop.Proxy
+include README.md
+include VERSION
 include config-example.yaml
+include qubes/securedrop.Proxy
+include requirements.txt
+include securedrop_proxy/*.py
+include setup.py

securedrop_proxy/VERSION

@@ -0,0 +1 @@
+0.1.3

securedrop_proxy/proxy.py

@@ -4,24 +4,26 @@
 import json
 import werkzeug
 
-class Req:
+import securedrop_proxy.version as version
+
 
+class Req:
     def __init__(self):
-        self.method = ''
-        self.path_query = ''
+        self.method = ""
+        self.path_query = ""
         self.body = None
         self.headers = {}
 
-class Response:
 
+class Response:
     def __init__(self, status):
         self.status = status
         self.body = None
         self.headers = {}
-        self.version = "0.1.2"
+        self.version = version.version
 
-class Proxy:
 
+class Proxy:
     @staticmethod
     def _on_done(res):
         print(json.dumps(res.__dict__))
@@ -63,15 +65,15 @@ def prep_request(self):
         method = self.req.method
 
         if not self.valid_path(path):
-            self.simple_error(400, 'Path provided in request did not look valid')
-            raise ValueError('Path provided was invalid')
+            self.simple_error(400, "Path provided in request did not look valid")
+            raise ValueError("Path provided was invalid")
 
         try:
             url = furl.furl("{}://{}:{}/{}".format(scheme, host, port, path))
         except Exception as e:
 
-            self.simple_error(500, 'Proxy error while generating URL to request')
-            raise ValueError('Error generating URL from provided values')
+            self.simple_error(500, "Proxy error while generating URL to request")
+            raise ValueError("Error generating URL from provided values")
 
         url.path.normalize()
 
@@ -113,7 +115,7 @@ def handle_non_json_response(self):
 
     def handle_response(self):
 
-        ctype = werkzeug.http.parse_options_header(self._presp.headers['content-type'])
+        ctype = werkzeug.http.parse_options_header(self._presp.headers["content-type"])
 
         if ctype[0] == "application/json":
             self.handle_json_response()
@@ -128,8 +130,8 @@ def proxy(self):
 
         try:
             if self.on_save is None:
-                self.simple_error(400, 'Request callback is not set.')
-                raise ValueError('Request callback is not set.')
+                self.simple_error(400, "Request callback is not set.")
+                raise ValueError("Request callback is not set.")
 
             self.prep_request()
             s = requests.Session()

securedrop_proxy/version.py

@@ -0,0 +1,3 @@
+import pkgutil
+
+version = pkgutil.get_data("securedrop_proxy", "VERSION").decode("utf-8")

setup.py

@@ -1,18 +1,21 @@
+import pkgutil
 import setuptools
 
 with open("README.md", "r") as fh:
     long_description = fh.read()
 
+version = pkgutil.get_data("securedrop_proxy", "VERSION").decode("utf-8")
+
 setuptools.setup(
     name="securedrop-proxy",
-    version="0.1.3",
+    version=version,
     author="Freedom of the Press Foundation",
     author_email="securedrop@freedom.press",
     description="SecureDrop Qubes proxy service",
     long_description=long_description,
     long_description_content_type="text/markdown",
     license="GPLv3+",
-    install_requires=["requests","furl", "pyyaml", "werkzeug"],
+    install_requires=["requests", "furl", "pyyaml", "werkzeug"],
     python_requires=">=3.5",
     url="https://github.com/freedomofpress/securedrop-proxy",
     packages=setuptools.find_packages(exclude=["docs", "tests"]),
@@ -24,9 +27,5 @@
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
     ),
-    entry_points={
-        'console_scripts': [
-            'sd-proxy = securedrop_proxy.entrypoint:start',
-        ],
-    },
+    entry_points={"console_scripts": ["sd-proxy = securedrop_proxy.entrypoint:start"]},
 )

tests/test_proxy.py

@@ -1,11 +1,11 @@
 import json
-import subprocess
 import vcr
 import unittest
 import uuid
 
 from securedrop_proxy import proxy
 from securedrop_proxy import config
+from securedrop_proxy import version
 
 
 class TestProxyValidConfig(unittest.TestCase):
@@ -25,6 +25,17 @@ def on_done(self, res):
         res.headers['X-Origin-Content-Type'] = res.headers['Content-Type']
         res.headers['Content-Type'] = 'application/json'
 
+    def test_version(self):
+        req = proxy.Req()
+        req.method = 'GET'
+        req.path_query = ''
+        req.headers = {'Accept': 'application/json'}
+
+        p = proxy.Proxy()
+        p.proxy()
+
+        self.assertEqual(p.res.version, version.version)
+
     def test_400_if_callback_not_set(self):
         req = proxy.Req()
         req.method = 'GET'