Add uninstall subcommand

README.md

@@ -50,21 +50,65 @@ It also adds new subcommands not available on the regular `conda`:
 This subcommand is mainly used by the installers generated with `constructor`.
 
 ```bash
-$ conda.exe constructor --help
-usage: conda.exe constructor [-h] --prefix PREFIX [--extract-conda-pkgs] [--extract-tarball] [--make-menus [PKG_NAME ...]] [--rm-menus]
+usage: conda.exe constructor [-h] [--prefix PREFIX] [--num-processors N]
+                             [--extract-conda-pkgs | --extract-tarball | --make-menus [PKG_NAME ...] | --rm-menus]
+                             {uninstall} ...
 
 constructor helper subcommand
 
-optional arguments:
+positional arguments:
+  {uninstall}
+
+options:
   -h, --help            show this help message and exit
   --prefix PREFIX       path to the conda environment to operate on
+  --num-processors N    Number of processors to use with --extract-conda-pkgs. Value must be int between 0 (auto) and the
+                        number of processors. Defaults to 3.
   --extract-conda-pkgs  extract conda packages found in prefix/pkgs
   --extract-tarball     extract tarball from stdin
   --make-menus [PKG_NAME ...]
-                        create menu items for the given packages; if none are given, create menu items for all packages in the environment specified by --prefix
+                        create menu items for the given packages; if none are given, create menu items for all packages
+                        in the environment specified by --prefix
   --rm-menus            remove menu items for all packages in the environment specified by --prefix
 ```
 
+### `conda.exe constructor uninstall`
+
+This subcommand can be used to uninstall a base environment and all sub-environments, including
+entire Miniconda/Miniforge installations.
+It is also possible to remove environments directories created by `conda create`. This feature is
+useful if `envs_dirs` is set inside `.condarc` file.
+
+There are several options to remove configuration and cache files:
+
+```bash
+$ conda.exe constructor uninstall [-h] --prefix PREFIX [--conda-clean] [--remove-config-files {user,system,all}]
+                                  [--remove-conda-caches]
+```
+
+- `--prefix` (required): Path to the conda directory to uninstall.
+- `--remove-caches`:
+  Removes the notices cache and runs conda --clean --all to clean package caches outside the
+  installation directory. This is especially useful when `pkgs_dirs` is set in a `.condarc` file.
+  Not recommended with multiple conda installations when softlinks are enabled.
+- `--remove-config-files {user,system,all}`:
+   Removes all .condarc files. `user` removes the files inside the current user's home directory
+   and `system` removes all files outside of that directory. Not recommended when multiple conda
+   installations are on the system or when running on an environments directory.
+- `--remove-user-data`:
+  Removes the ~/.conda directory. Not recommended when multiple conda installations are installed
+  on the system or when running on an environments directory.
+
+> [!IMPORTANT]
+> Use `sudo -E` if removing system-level configuration files requires superuser privileges.
+> `conda` relies on environment variables like `HOME` and `XDG_CONFIG_HOME` when detecting
+> configuration files, which may be overwritten with just `sudo`.
+> This can cause files to be left behind.
+
+> [!WARNING]
+> Support for softlinks is still untested.
+> The uninstaller will only perform unlink operations and not delete any files the links point to.
+
 ### `conda.exe python`
 
 This subcommand provides access to the Python interpreter bundled in the conda-standalone

news/112-add-uninstall-subcommand

@@ -0,0 +1,20 @@
+### Enhancements
+
+* Add `uninstall` subcommand, which uninstalls all environments inside a prefix and reverses
+  `conda init` commands. It also for deleting cache directories and configuration files. (#112)
+
+### Bug fixes
+
+* <news item>
+
+### Deprecations
+
+* <news item>
+
+### Docs
+
+* <news item>
+
+### Other
+
+* <news item>

recipe/meta.yaml

@@ -49,8 +49,9 @@ requirements:
 
 test:
   requires:
-    - pytest
+    - conda
     - menuinst >={{ menuinst_lower_bound }}
+    - pytest
     - ruamel.yaml
   source_files:
     - tests