Implement platform specific user config locations

CHANGES.txt

@@ -18,7 +18,7 @@
   existing options have been made non functional but will still be accepted
   until their removal in pip v1.8. For more information please see
   https://pip.pypa.io/en/latest/reference/pip_install.html#caching
-  
+
 * Added a virtualenv-specific configuration file. (:pull:`1364`)
 
 * Added site-wide configuation files. (:pull:`1978`)
@@ -41,7 +41,7 @@
 
 * Fixed :issue:`1618`. Pip no longer adds duplicate logging consumers, so it
   won't create duplicate output when being called multiple times. (:pull:`1723`)
-  
+
 * Added general flag `--no-check-certificate` to tell pip NOT to verify
   the security of HTTPS connections. (:pull:`1741`:)
 
@@ -67,13 +67,16 @@
 
 * Fixed :issue:`1180`. Added support to respect proxies in ``pip search``. It
   also fixes :issue:`932` and :issue:`1104`. (:pull:`1902`)
-  
+
 * Fixed :issue:`798` and :issue:`1060`. `pip install --download` works with vcs links.
   (:pull:`1926`)
 
 * Fixed :issue:`1456`. Disabled warning about insecure index host when using localhost.
   Based off of Guy Rozendorn's work in :pull:`1718`. (:pull:`1967`)
 
+* Allow the use of OS standard user configuration files instead of ones simply
+  based around ``$HOME``. (:pull:`2021`)
+
 
 **1.5.7**
 

docs/user_guide.rst

@@ -242,6 +242,15 @@ all users) configuration:
 
 **Per-user**:
 
+* On Unix the default configuration file is: :file:`$HOME/.config/pip/pip.conf`
+  which respects the ``XDG_CONFIG_HOME`` environment variable.
+* On Mac OS X the configuration file is
+  :file:`$HOME/Library/Application Support/pip/pip.conf`.
+* On Windows the configuration file is :file:`%APPDATA%\\pip\\pip.ini`.
+
+There are also a legacy per-user configuration file which is also respected,
+these are located at:
+
 * On Unix and Mac OS X the configuration file is: :file:`$HOME/.pip/pip.conf`
 * On Windows the configuration file is: :file:`%HOME%\\pip\\pip.ini`
 

pip/baseparser.py

@@ -10,10 +10,10 @@
 from pip._vendor.six import string_types
 from pip._vendor.six.moves import configparser
 from pip.locations import (
-    default_config_file, default_config_basename, running_under_virtualenv,
+    legacy_config_file, config_basename, running_under_virtualenv,
     site_config_files
 )
-from pip.utils import get_terminal_size
+from pip.utils import appdirs, get_terminal_size
 
 
 class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
@@ -154,13 +154,21 @@ def get_config_files(self):
         if config_file and os.path.exists(config_file):
             files.append(config_file)
         else:
-            files.append(default_config_file)
+            # This is the legacy config file, we consider it to be a lower
+            # priority than the new file location.
+            files.append(legacy_config_file)
+
+            # This is the new config file, we consider it to be a higher
+            # priority than the legacy file.
+            files.append(
+                os.path.join(appdirs.user_config_dir("pip"), config_basename)
+            )
 
         # finally virtualenv configuration first trumping others
         if running_under_virtualenv():
             venv_config_file = os.path.join(
                 sys.prefix,
-                default_config_basename,
+                config_basename,
             )
             if os.path.exists(venv_config_file):
                 files.append(venv_config_file)

pip/locations.py

@@ -179,20 +179,24 @@ def _get_build_prefix():
     if not os.path.exists(bin_py):
         bin_py = os.path.join(sys.prefix, 'bin')
         bin_user = os.path.join(user_site, 'bin')
-    default_storage_dir = os.path.join(user_dir, 'pip')
-    default_config_basename = 'pip.ini'
-    default_config_file = os.path.join(
-        default_storage_dir,
-        default_config_basename,
+
+    config_basename = 'pip.ini'
+
+    legacy_storage_dir = os.path.join(user_dir, 'pip')
+    legacy_config_file = os.path.join(
+        legacy_storage_dir,
+        config_basename,
     )
 else:
     bin_py = os.path.join(sys.prefix, 'bin')
     bin_user = os.path.join(user_site, 'bin')
-    default_storage_dir = os.path.join(user_dir, '.pip')
-    default_config_basename = 'pip.conf'
-    default_config_file = os.path.join(
-        default_storage_dir,
-        default_config_basename,
+
+    config_basename = 'pip.conf'
+
+    legacy_storage_dir = os.path.join(user_dir, '.pip')
+    legacy_config_file = os.path.join(
+        legacy_storage_dir,
+        config_basename,
     )
 
     # Forcing to use /usr/local/bin for standard Mac OS X framework installs
@@ -201,7 +205,7 @@ def _get_build_prefix():
         bin_py = '/usr/local/bin'
 
 site_config_files = [
-    os.path.join(path, default_config_basename)
+    os.path.join(path, config_basename)
     for path in appdirs.site_config_dirs('pip')
 ]
 

pip/utils/appdirs.py

@@ -130,6 +130,37 @@ def user_log_dir(appname):
     return path
 
 
+def user_config_dir(appname, roaming=True):
+    """Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "roaming" (boolean, default True) can be set False to not use the
+            Windows roaming appdata directory. That means that for users on a
+            Windows network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by deafult "~/.config/<AppName>".
+    """
+    if WINDOWS:
+        path = user_data_dir(appname, roaming=roaming)
+    elif sys.platform == "darwin":
+        path = user_data_dir(appname)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        path = os.path.join(path, appname)
+
+    return path
+
+
 # for the discussion regarding site_config_dirs locations
 # see <https://github.com/pypa/pip/issues/1733>
 def site_config_dirs(appname):

tests/functional/test_install_config.py

@@ -172,9 +172,9 @@ def test_options_from_venv_config(script, virtualenv):
     Test if ConfigOptionParser reads a virtualenv-local config file
 
     """
-    from pip.locations import default_config_basename
+    from pip.locations import config_basename
     conf = "[global]\nno-index = true"
-    ini = virtualenv.location / default_config_basename
+    ini = virtualenv.location / config_basename
     with open(ini, 'w') as f:
         f.write(conf)
     result = script.pip('install', '-vvv', 'INITools', expect_error=True)

tests/unit/test_appdirs.py

@@ -153,6 +153,66 @@ def test_user_data_dir_linux_override(self, monkeypatch):
         assert appdirs.user_data_dir("pip") == "/home/test/.other-share/pip"
 
 
+class TestUserConfigDir:
+
+    def test_user_config_dir_win_no_roaming(self, monkeypatch):
+        @pretend.call_recorder
+        def _get_win_folder(base):
+            return "C:\\Users\\test\\AppData\\Local"
+
+        monkeypatch.setattr(
+            appdirs,
+            "_get_win_folder",
+            _get_win_folder,
+            raising=False,
+        )
+        monkeypatch.setattr(appdirs, "WINDOWS", True)
+
+        assert (
+            appdirs.user_config_dir("pip", roaming=False).replace("/", "\\")
+            == "C:\\Users\\test\\AppData\\Local\\pip"
+        )
+        assert _get_win_folder.calls == [pretend.call("CSIDL_LOCAL_APPDATA")]
+
+    def test_user_config_dir_win_yes_roaming(self, monkeypatch):
+        @pretend.call_recorder
+        def _get_win_folder(base):
+            return "C:\\Users\\test\\AppData\\Roaming"
+
+        monkeypatch.setattr(
+            appdirs,
+            "_get_win_folder",
+            _get_win_folder,
+            raising=False,
+        )
+        monkeypatch.setattr(appdirs, "WINDOWS", True)
+
+        assert (appdirs.user_config_dir("pip").replace("/", "\\")
+                == "C:\\Users\\test\\AppData\\Roaming\\pip")
+        assert _get_win_folder.calls == [pretend.call("CSIDL_APPDATA")]
+
+    def test_user_config_dir_osx(self, monkeypatch):
+        monkeypatch.setenv("HOME", "/home/test")
+        monkeypatch.setattr(sys, "platform", "darwin")
+
+        assert (appdirs.user_config_dir("pip")
+                == "/home/test/Library/Application Support/pip")
+
+    def test_user_config_dir_linux(self, monkeypatch):
+        monkeypatch.delenv("XDG_CONFIG_HOME")
+        monkeypatch.setenv("HOME", "/home/test")
+        monkeypatch.setattr(sys, "platform", "linux2")
+
+        assert appdirs.user_config_dir("pip") == "/home/test/.config/pip"
+
+    def test_user_config_dir_linux_override(self, monkeypatch):
+        monkeypatch.setenv("XDG_CONFIG_HOME", "/home/test/.other-config")
+        monkeypatch.setenv("HOME", "/home/test")
+        monkeypatch.setattr(sys, "platform", "linux2")
+
+        assert appdirs.user_config_dir("pip") == "/home/test/.other-config/pip"
+
+
 class TestUserLogDir:
 
     def test_user_log_dir_win(self, monkeypatch):

tests/unit/test_options.py

@@ -287,4 +287,4 @@ def test_venv_config_file_found(self, monkeypatch):
         )
         monkeypatch.setattr(os.path, 'exists', lambda filename: True)
         cp = pip.baseparser.ConfigOptionParser()
-        assert len(cp.get_config_files()) == 3
+        assert len(cp.get_config_files()) == 4