Correctly handle cwd

src/appenv.py

@@ -307,7 +307,7 @@ class AppEnv(object):
     env_dir = None  # The current specific venv that we're working with.
     appenv_dir = None  # The directory where to place specific venvs.
 
-    def __init__(self, base):
+    def __init__(self, base, original_cwd):
         self.base = base
 
         # This used to be computed based on the application name but
@@ -318,7 +318,7 @@ def __init__(self, base):
         # Allow simplifying a lot of code by assuming that all the
         # meta-operations happen in the base directory. Store the original
         # working directory here so we switch back at the appropriate time.
-        self.original_cwd = os.path.abspath(os.curdir)
+        self.original_cwd = original_cwd
 
     def meta(self):
         # Parse the appenv arguments
@@ -565,6 +565,7 @@ def update_lockfile(self, args=None, remaining=None):
 
 def main():
     base = os.path.dirname(__file__)
+    original_cwd = os.getcwd()
 
     ensure_best_python(base)
     # clear PYTHONPATH variable to get a defined environment
@@ -576,14 +577,11 @@ def main():
     # Determine whether we're being called as appenv or as an application name
     application_name = os.path.splitext(os.path.basename(__file__))[0]
 
-    appenv = AppEnv(base)
-    try:
-        if application_name == 'appenv':
-            appenv.meta()
-        else:
-            appenv.run(application_name, sys.argv[1:])
-    finally:
-        os.chdir(appenv.original_cwd)
+    appenv = AppEnv(base, original_cwd)
+    if application_name == 'appenv':
+        appenv.meta()
+    else:
+        appenv.run(application_name, sys.argv[1:])
 
 
 if __name__ == "__main__":

tests/test_init.py

@@ -9,7 +9,7 @@ def test_init(workdir, monkeypatch):
 
     assert not os.path.exists(os.path.join(workdir, "ducker"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
 
     assert os.readlink(os.path.join(workdir, "ducker", "ducker")) == 'appenv'
@@ -46,7 +46,7 @@ def test_init(workdir, monkeypatch):
 def test_init_explicit_target(workdir, monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("ducker\n\nbaz\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
 
     assert os.path.exists(os.path.join(workdir, "baz"))
@@ -65,7 +65,7 @@ def test_init_explicit_target(workdir, monkeypatch):
 def test_init_explicit_package_and_target(workdir, monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("foo\nbar\nbaz\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
 
     assert os.path.exists(os.path.join(workdir, "baz"))

tests/test_prepare.py

@@ -7,7 +7,7 @@ def test_prepare_creates_envdir(workdir, monkeypatch):
     monkeypatch.setattr('sys.stdin', io.StringIO('ducker\nducker<2.0.2\n\n'))
     os.makedirs(os.path.join(workdir, 'ducker'))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
     assert not os.path.exists(env.appenv_dir)
     env.update_lockfile()
@@ -20,7 +20,7 @@ def test_prepare_creates_venv_symlink(workdir, monkeypatch):
     monkeypatch.setattr('sys.stdin', io.StringIO('ducker\nducker<2.0.2\n\n'))
     os.makedirs(os.path.join(workdir, 'ducker'))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
     env.update_lockfile()
     env.prepare()

tests/test_reset.py

@@ -4,15 +4,15 @@
 
 
 def test_reset_nonexisting_envdir_silent(tmpdir):
-    env = appenv.AppEnv(os.path.join(tmpdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(tmpdir, 'ducker'), os.getcwd())
     assert not os.path.exists(env.appenv_dir)
     env.reset()
     assert not os.path.exists(env.appenv_dir)
     assert os.path.exists(str(tmpdir))
 
 
 def test_reset_removes_envdir_with_subdirs(tmpdir):
-    env = appenv.AppEnv(os.path.join(tmpdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(tmpdir, 'ducker'), os.getcwd())
     os.makedirs(env.appenv_dir)
     assert os.path.exists(env.appenv_dir)
     env.reset()

tests/test_run.py

@@ -18,7 +18,7 @@ def test_bootstrap_lockfile_missing_dependency():
 def test_bootstrap_and_run_with_lockfile(workdir, monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("ducker\nducker==2.0.1\n\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
 
     env.init()
     env.update_lockfile()
@@ -37,7 +37,7 @@ def test_bootstrap_and_run_with_lockfile(workdir, monkeypatch):
 def test_bootstrap_and_run_python_with_lockfile(workdir, monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("ducker\nducker==2.0.1\n\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
 
     env.init()
     env.update_lockfile()
@@ -57,7 +57,7 @@ def test_bootstrap_and_run_without_lockfile(workdir, monkeypatch):
     """It raises as error if no requirements.lock is present."""
     monkeypatch.setattr("sys.stdin", io.StringIO("ducker\nducker==2.0.1\n\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
 
     env.init()
 
@@ -78,7 +78,7 @@ def test_bootstrap_and_run_without_lockfile(workdir, monkeypatch):
 def test_bootstrap_and_run_with_outdated_lockfile(workdir, monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("ducker\nducker==2.0.1\n\n"))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
 
     env.init()
     env.update_lockfile()

tests/test_update_lockfile.py

@@ -10,7 +10,7 @@
 def test_init_and_create_lockfile(workdir, monkeypatch):
     monkeypatch.setattr('sys.stdin', io.StringIO('ducker\nducker<2.0.2\n\n'))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ducker'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ducker'), os.getcwd())
     env.init()
 
     lockfile = os.path.join(workdir, "ducker", "requirements.lock")
@@ -34,7 +34,7 @@ def test_update_lockfile_minimal_python(workdir, monkeypatch):
     monkeypatch.setattr('sys.stdin',
                         io.StringIO('pytest\npytest==6.1.2\nppytest\n'))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ppytest'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ppytest'), os.getcwd())
     env.init()
 
     lockfile = os.path.join(workdir, "ppytest", "requirements.lock")
@@ -66,7 +66,7 @@ def test_update_lockfile_missing_minimal_python(workdir, monkeypatch):
     monkeypatch.setattr('sys.stdin',
                         io.StringIO('pytest\npytest==6.1.2\nppytest\n'))
 
-    env = appenv.AppEnv(os.path.join(workdir, 'ppytest'))
+    env = appenv.AppEnv(os.path.join(workdir, 'ppytest'), os.getcwd())
     env.init()
 
     requirements_file = os.path.join(workdir, "ppytest", "requirements.txt")