retire soon-to-be EoL Python 3.7. Hello walrus operator...

.github/workflows/build.yml

@@ -66,11 +66,6 @@ jobs:
             goal: build
             arch: Win32
             openssl_archs: VC-WIN32
-          - os: ubuntu-22.04
-            goal: test
-            python: "3.7"
-            jid: 8
-            arch: x86_64
           - os: ubuntu-22.04
             goal: test
             python: "3.8"
@@ -105,8 +100,6 @@ jobs:
         with:
           workload_identity_provider: projects/297925809119/locations/global/workloadIdentityPools/gha-pool/providers/gha-provider
           service_account: github-actions-testing-for-gam@gam-project-wyo-lub-ivl.iam.gserviceaccount.com
-          #access_token_scopes: https://www.googleapis.com/auth/iam
-          #token_format: access_token
 
       - name: Cache multiple paths
         if: matrix.goal == 'build'

src/gam/__main__.py

@@ -22,25 +22,33 @@ For more information, see https://jaylee.us/gam
 """
 
 import sys
-from multiprocessing import freeze_support
-from multiprocessing import set_start_method
-
-from gam import controlflow
-import gam
-
 
+# Note that this file (and only this file) should remain compatible
+# with older Python versions so we can return a meaningful error
+# instead of a syntax error.
 def main():
+    required_ver = (3, 8, 0)
+    if sys.version_info[:3] < required_ver:
+        err_result = ('ERROR: GAM requires Python %s.%s.%s or newer. You are '
+                'running %s.%s.%s. Please upgrade your Python version '
+                'or use one of the binary GAM downloads.\n' %
+                (required_ver[0],
+                 required_ver[1],
+                 required_ver[2],
+                 sys.version_info[0],
+                 sys.version_info[1],
+                 sys.version_info[2]))
+        sys.stderr.write(err_result)
+        sys.exit(5)
+    from multiprocessing import freeze_support
     freeze_support()
     if sys.platform == 'darwin':
         # https://bugs.python.org/issue33725 in Python 3.8.0 seems
         # to break parallel operations with errors about extra -b
         # command line arguments
+        from multiprocessing import set_start_method
         set_start_method('fork')
-    if sys.version_info[0] < 3 or sys.version_info[1] < 7:
+    import gam
-        controlflow.system_error_exit(
-            5,
-            f'GAM requires Python 3.7 or newer. You are running %s.%s.%s. Please upgrade your Python version or use one of the binary GAM downloads.'
-            % sys.version_info[:3])
     sys.exit(gam.ProcessGAMCommand(sys.argv))
 
 

src/requirements.txt

@@ -4,9 +4,8 @@ filelock
 google-api-python-client>=2.1
 google-auth-httplib2
 google-auth-oauthlib>=0.4.1
-google-auth>=2.3.2
+google-auth[reauth]>=2.3.2
 httplib2>=0.17.0
-importlib.metadata; python_version < '3.8'
 passlib>=1.7.2
 pathvalidate
 python-dateutil

src/setup.cfg

@@ -13,15 +13,15 @@ keywords = google, oauth2, gsuite, google-apps, google-admin-sdk, google-drive,
 classifiers =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     License :: OSI Approved :: Apache License
 
 [options]
 packages = find:
-python_requires = >= 3.7
+python_requires = >= 3.8
 install_requires =
     cryptography
     distro; sys_platform == 'linux'
@@ -33,9 +33,9 @@ install_requires =
     httplib2 >= 0.20.2
     importlib.metadata; python_version < '3.8'
     passlib >= 1.7.4
-    python-dateutil
-    yubikey-manager >= 4.0.0
     pathvalidate
+    python-dateutil
+    yubikey-manager >= 5.0
 
 [options.package_data]
 * = *.pem