Merge pull request #48 from jaraco/feature/read-deps-check

Ensure read-deps errors when the specified script does not exist.

CHANGES.rst

@@ -1,3 +1,8 @@
+v8.3.0
+======
+
+#47: ``read_deps`` now errors on non-existent files.
+
 v8.2.1
 ======
 

pip_run/read-deps.py

@@ -2,19 +2,19 @@
 Emit parameters to pip extracted from a script.
 """
 
-import sys
+import autocommand
+import path
 
 from .scripts import DepsReader
 
 
-def run(args=None):
+@autocommand.autocommand(__name__)
+def run(script: path.ExtantFile):
     """
     >>> run(['examples/test-mongodb-covered-query.py'])
     pytest jaraco.mongodb>=3.10
+    >>> run(['does-not-exist'])
+    Traceback (most recent call last):
+    FileNotFoundError: does-not-exist does not exist as a file.
     """
-    (script,) = args or sys.argv[1:]
-    deps = DepsReader.try_read(script)
-    print(' '.join(deps.params()))
-
-
-__name__ == '__main__' and run()
+    print(' '.join(DepsReader.try_read(script).params()))

setup.cfg

@@ -19,7 +19,10 @@ packages = find_namespace:
 include_package_data = true
 py_modules = pip-run
 python_requires = >=3.6
-install_requires = pip >= 19.3
+install_requires =
+	pip >= 19.3
+	autocommand
+	path >= 15.1
 setup_requires = setuptools_scm[toml] >= 3.4.1
 
 [options.packages.find]