add shell and version parser

.github/ISSUE_TEMPLATE/bug-report.md

@@ -11,9 +11,9 @@ assignees: ''
 
 A clear and concise description of what the bug is.
 
-### Steps to Reproduce
+### Steps to reproduce
 
-Steps to reproduce the behavior (commands, environment etc)
+Steps to reproduce the behavior (commands, environment etc).
 
 ### Expected behavior
 
@@ -21,4 +21,8 @@ A clear and concise description of what you expected to happen.
 
 ### Logs
 
-Add logs to help explain your problem. Logs to stderr can be generated by using `--no-log` command line option.
+Add logs to help explain your problem. By default, the application writes logs into `/dev/log` which is usually default systemd journal and can be accessed by `journalctl` command.
+
+You can also attach any additional information which can be helpful, e.g. configuration used by the application (be aware of passwords and other secrets if any); it can be generated by using `ahriman config` command.
+
+It is also sometimes useful to have information about installed packages which can be accessed by `ahriman version` command.

.github/ISSUE_TEMPLATE/feature-request.md

@@ -13,7 +13,7 @@ Brief description of the feature required
 
 ### Cause of the feature request
 
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+A clear and concise description of what the problem is. E.g. I'm always frustrated when [...]
 
 ### Proposed changes and/or features
 

docs/ahriman.1

@@ -3,9 +3,9 @@
 ahriman
 .SH SYNOPSIS
 .B ahriman
-[-h] [-a ARCHITECTURE] [-c CONFIGURATION] [--force] [-l LOCK] [--no-report] [-q] [--unsafe] [-v] {aur-search,search,help,help-commands-unsafe,key-import,package-add,add,package-update,package-remove,remove,package-status,status,package-status-remove,package-status-update,status-update,patch-add,patch-list,patch-remove,repo-backup,repo-check,check,repo-clean,clean,repo-config,config,repo-rebuild,rebuild,repo-remove-unknown,remove-unknown,repo-report,report,repo-restore,repo-setup,init,repo-init,setup,repo-sign,sign,repo-status-update,repo-sync,sync,repo-triggers,repo-update,update,user-add,user-list,user-remove,web} ...
+[-h] [-a ARCHITECTURE] [-c CONFIGURATION] [--force] [-l LOCK] [--no-report] [-q] [--unsafe] [-V] {aur-search,search,help,help-commands-unsafe,key-import,package-add,add,package-update,package-remove,remove,package-status,status,package-status-remove,package-status-update,status-update,patch-add,patch-list,patch-remove,repo-backup,repo-check,check,repo-clean,clean,repo-config,config,repo-rebuild,rebuild,repo-remove-unknown,remove-unknown,repo-report,report,repo-restore,repo-setup,init,repo-init,setup,repo-sign,sign,repo-status-update,repo-sync,sync,repo-triggers,repo-update,update,shell,user-add,user-list,user-remove,version,web} ...
 .SH DESCRIPTION
-ArcH Linux ReposItory MANager
+ArcH linux ReposItory MANager
 
 .SH OPTIONS
 .TP
@@ -37,7 +37,7 @@ force disable any logging
 allow to run ahriman as non\-ahriman user. Some actions might be unavailable
 
 .TP
-\fB\-v\fR, \fB\-\-version\fR
+\fB\-V\fR, \fB\-\-version\fR
 show program's version number and exit
 
 .SH
@@ -121,6 +121,9 @@ run triggers
 \fBahriman\fR \fI\,repo-update\/\fR
 update packages
 .TP
+\fBahriman\fR \fI\,shell\/\fR
+envoke python shell
+.TP
 \fBahriman\fR \fI\,user-add\/\fR
 create or update user
 .TP
@@ -130,6 +133,9 @@ user known users and their access
 \fBahriman\fR \fI\,user-remove\/\fR
 remove user
 .TP
+\fBahriman\fR \fI\,version\/\fR
+application version
+.TP
 \fBahriman\fR \fI\,web\/\fR
 web server
 .SH COMMAND \fI\,'ahriman aur-search'\/\fR
@@ -544,6 +550,11 @@ do not include manual updates
 \fB\-\-no\-vcs\fR
 do not check VCS packages
 
+.SH COMMAND \fI\,'ahriman shell'\/\fR
+usage: ahriman shell [-h]
+
+drop into python shell while having created application
+
 .SH COMMAND \fI\,'ahriman user-add'\/\fR
 usage: ahriman user-add [-h] [--as-service] [-p PASSWORD]
                         [-r {UserAccess.Unauthorized,UserAccess.Read,UserAccess.Reporter,UserAccess.Full}] [-s]
@@ -606,6 +617,11 @@ username for web service
 \fB\-s\fR, \fB\-\-secure\fR
 set file permissions to user\-only
 
+.SH COMMAND \fI\,'ahriman version'\/\fR
+usage: ahriman version [-h]
+
+print application and its dependencies versions
+
 .SH COMMAND \fI\,'ahriman web'\/\fR
 usage: ahriman web [-h]
 

docs/ahriman.application.handlers.rst

@@ -116,6 +116,14 @@ ahriman.application.handlers.setup module
    :no-undoc-members:
    :show-inheritance:
 
+ahriman.application.handlers.shell module
+-----------------------------------------
+
+.. automodule:: ahriman.application.handlers.shell
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
 ahriman.application.handlers.sign module
 ----------------------------------------
 
@@ -172,6 +180,14 @@ ahriman.application.handlers.users module
    :no-undoc-members:
    :show-inheritance:
 
+ahriman.application.handlers.versions module
+--------------------------------------------
+
+.. automodule:: ahriman.application.handlers.versions
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
 ahriman.application.handlers.web module
 ---------------------------------------
 

docs/ahriman.core.formatters.rst

@@ -76,6 +76,14 @@ ahriman.core.formatters.user\_printer module
    :no-undoc-members:
    :show-inheritance:
 
+ahriman.core.formatters.version\_printer module
+-----------------------------------------------
+
+.. automodule:: ahriman.core.formatters.version_printer
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
 Module contents
 ---------------
 

docs/conf.py

@@ -104,5 +104,4 @@ autodoc_member_order = "groupwise"
 
 autodoc_default_options = {
     "no-undoc-members": True,
-    "special-members": "__init__",
 }

package/share/ahriman/templates/shell

@@ -0,0 +1,18 @@
+                                              
+                         ▄▄▄    ▄▄▄▄▄▄█▀      
+                       ▄▄▄▄▄▄▄▄▄██▄▄▄█▄▄      
+                       ██▄▄███▄▄▄▄▄██▄▄█▄▄    
+                       █▄██████▄▄▄████▄▄█▄▄  ▄
+                       █▄▄▄█████████▄▄▄▄▀▄█▄█▀
+                      █▄▀▄████▄█▄▄▄▄███▄▄ ▀▀  
+                      █▄▄▄████▄██████████     
+         ▄▄▄▄▄▄▄▄▄     ▀█▄█████▄▄▄▄█▄███▄     
+       ▄▄███▄▄▄▄▄▄▄▄▄    ▀ ▀▄█████▄▄█▄███     
+       ███▄▄████▄▄█▄██▄▄▄   ███▄▄▄▄▄▄█▀▀      
+       ███████▄▀    ▄▄▄██▄▄▄█████             
+       ██▄▄████    █▄█▄▄█████████             
+      ▄▄█▄▄██▄▀    ▀▄████▄██▄██▄▄             
+      ████████      ▄███▄▄▄█▄████             
+     ▄▄▄▄███▄▀     ▄▄█████ ███▄▄▄▄            
+ ▄▄▄██▄▄█▄▄▄▀      █████▄█ █████▄█            
+  ▀▀▀▀▀▀▀           ▀▀▀▀    ▀▀▀▀              

setup.py

@@ -66,6 +66,7 @@ setup(
             "package/share/ahriman/templates/build-status.jinja2",
             "package/share/ahriman/templates/email-index.jinja2",
             "package/share/ahriman/templates/repo-index.jinja2",
+            "package/share/ahriman/templates/shell",
             "package/share/ahriman/templates/telegram-index.jinja2",
         ]),
         ("share/ahriman/templates/build-status", [

src/ahriman/application/ahriman.py

@@ -26,6 +26,7 @@ from typing import List, TypeVar
 
 from ahriman import version
 from ahriman.application import handlers
+from ahriman.core.util import enum_values
 from ahriman.models.action import Action
 from ahriman.models.build_status import BuildStatusEnum
 from ahriman.models.package_source import PackageSource
@@ -76,7 +77,7 @@ def _parser() -> argparse.ArgumentParser:
     parser.add_argument("-q", "--quiet", help="force disable any logging", action="store_true")
     parser.add_argument("--unsafe", help="allow to run ahriman as non-ahriman user. Some actions might be unavailable",
                         action="store_true")
-    parser.add_argument("-v", "--version", action="version", version=version.__version__)
+    parser.add_argument("-V", "--version", action="version", version=version.__version__)
 
     subparsers = parser.add_subparsers(title="command", help="command to run", dest="command", required=True)
 
@@ -106,9 +107,11 @@ def _parser() -> argparse.ArgumentParser:
     _set_repo_sync_parser(subparsers)
     _set_repo_triggers_parser(subparsers)
     _set_repo_update_parser(subparsers)
+    _set_shell_parser(subparsers)
     _set_user_add_parser(subparsers)
     _set_user_list_parser(subparsers)
     _set_user_remove_parser(subparsers)
+    _set_version_parser(subparsers)
     _set_web_parser(subparsers)
 
     return parser
@@ -225,7 +228,7 @@ def _set_package_add_parser(root: SubParserAction) -> argparse.ArgumentParser:
     parser.add_argument("-e", "--exit-code", help="return non-zero exit status if result is empty", action="store_true")
     parser.add_argument("-n", "--now", help="run update function after", action="store_true")
     parser.add_argument("-s", "--source", help="explicitly specify the package source for this command",
-                        type=PackageSource, choices=PackageSource, default=PackageSource.Auto)
+                        type=PackageSource, choices=enum_values(PackageSource), default=PackageSource.Auto)
     parser.add_argument("--without-dependencies", help="do not add dependencies", action="store_true")
     parser.set_defaults(handler=handlers.Add)
     return parser
@@ -267,7 +270,7 @@ def _set_package_status_parser(root: SubParserAction) -> argparse.ArgumentParser
     parser.add_argument("-e", "--exit-code", help="return non-zero exit status if result is empty", action="store_true")
     parser.add_argument("-i", "--info", help="show additional package information", action="store_true")
     parser.add_argument("-s", "--status", help="filter packages by status",
-                        type=BuildStatusEnum, choices=BuildStatusEnum)
+                        type=BuildStatusEnum, choices=enum_values(BuildStatusEnum))
     parser.set_defaults(handler=handlers.Status, lock=None, no_report=True, quiet=True, unsafe=True)
     return parser
 
@@ -309,7 +312,7 @@ def _set_package_status_update_parser(root: SubParserAction) -> argparse.Argumen
                                         "If no packages supplied, service status will be updated",
                         nargs="*")
     parser.add_argument("-s", "--status", help="new status",
-                        type=BuildStatusEnum, choices=BuildStatusEnum, default=BuildStatusEnum.Success)
+                        type=BuildStatusEnum, choices=enum_values(BuildStatusEnum), default=BuildStatusEnum.Success)
     parser.set_defaults(handler=handlers.StatusUpdate, action=Action.Update, lock=None, no_report=True, quiet=True,
                         unsafe=True)
     return parser
@@ -556,7 +559,7 @@ def _set_repo_setup_parser(root: SubParserAction) -> argparse.ArgumentParser:
     parser.add_argument("--repository", help="repository name", required=True)
     parser.add_argument("--sign-key", help="sign key id")
     parser.add_argument("--sign-target", help="sign options", action="append",
-                        type=SignSettings.from_option, choices=SignSettings)
+                        type=SignSettings.from_option, choices=enum_values(SignSettings))
     parser.add_argument("--web-port", help="port of the web service", type=int)
     parser.set_defaults(handler=handlers.Setup, lock=None, no_report=True, quiet=True, unsafe=True)
     return parser
@@ -594,7 +597,7 @@ def _set_repo_status_update_parser(root: SubParserAction) -> argparse.ArgumentPa
     parser = root.add_parser("repo-status-update", help="update repository status",
                              description="update repository status on the status page", formatter_class=_formatter)
     parser.add_argument("-s", "--status", help="new status",
-                        type=BuildStatusEnum, choices=BuildStatusEnum, default=BuildStatusEnum.Success)
+                        type=BuildStatusEnum, choices=enum_values(BuildStatusEnum), default=BuildStatusEnum.Success)
     parser.set_defaults(handler=handlers.StatusUpdate, action=Action.Update, lock=None, no_report=True, package=[],
                         quiet=True, unsafe=True)
     return parser
@@ -661,6 +664,24 @@ def _set_repo_update_parser(root: SubParserAction) -> argparse.ArgumentParser:
     return parser
 
 
+def _set_shell_parser(root: SubParserAction) -> argparse.ArgumentParser:
+    """
+    add parser for shell subcommand
+
+    Args:
+        root(SubParserAction): subparsers for the commands
+
+    Returns:
+        argparse.ArgumentParser: created argument parser
+    """
+    parser = root.add_parser("shell", help="envoke python shell",
+                             description="drop into python shell while having created application",
+                             formatter_class=_formatter)
+    parser.add_argument("-v", "--verbose", help=argparse.SUPPRESS, action="store_true")
+    parser.set_defaults(handler=handlers.Shell, lock=None, no_report=True)
+    return parser
+
+
 def _set_user_add_parser(root: SubParserAction) -> argparse.ArgumentParser:
     """
     add parser for create user subcommand
@@ -680,7 +701,7 @@ def _set_user_add_parser(root: SubParserAction) -> argparse.ArgumentParser:
     parser.add_argument("-p", "--password", help="user password. Blank password will be treated as empty password, "
                                                  "which is in particular must be used for OAuth2 authorization type.")
     parser.add_argument("-r", "--role", help="user access level",
-                        type=UserAccess, choices=UserAccess, default=UserAccess.Read)
+                        type=UserAccess, choices=enum_values(UserAccess), default=UserAccess.Read)
     parser.add_argument("-s", "--secure", help="set file permissions to user-only", action="store_true")
     parser.set_defaults(handler=handlers.Users, action=Action.Update, architecture=[""], lock=None, no_report=True,
                         quiet=True, unsafe=True)
@@ -702,7 +723,7 @@ def _set_user_list_parser(root: SubParserAction) -> argparse.ArgumentParser:
                              formatter_class=_formatter)
     parser.add_argument("username", help="filter users by username", nargs="?")
     parser.add_argument("-e", "--exit-code", help="return non-zero exit status if result is empty", action="store_true")
-    parser.add_argument("-r", "--role", help="filter users by role", type=UserAccess, choices=UserAccess)
+    parser.add_argument("-r", "--role", help="filter users by role", type=UserAccess, choices=enum_values(UserAccess))
     parser.set_defaults(handler=handlers.Users, action=Action.List, architecture=[""], lock=None, no_report=True,  # nosec
                         password="", quiet=True, unsafe=True)
     return parser
@@ -728,6 +749,23 @@ def _set_user_remove_parser(root: SubParserAction) -> argparse.ArgumentParser:
     return parser
 
 
+def _set_version_parser(root: SubParserAction) -> argparse.ArgumentParser:
+    """
+    add parser for version subcommand
+
+    Args:
+        root(SubParserAction): subparsers for the commands
+
+    Returns:
+        argparse.ArgumentParser: created argument parser
+    """
+    parser = root.add_parser("version", help="application version",
+                             description="print application and its dependencies versions", formatter_class=_formatter)
+    parser.set_defaults(handler=handlers.Versions, architecture=[""], lock=None, no_report=True, quiet=True,
+                        unsafe=True)
+    return parser
+
+
 def _set_web_parser(root: SubParserAction) -> argparse.ArgumentParser:
     """
     add parser for web subcommand

src/ahriman/application/handlers/__init__.py

@@ -32,6 +32,7 @@ from ahriman.application.handlers.remove_unknown import RemoveUnknown
 from ahriman.application.handlers.restore import Restore
 from ahriman.application.handlers.search import Search
 from ahriman.application.handlers.setup import Setup
+from ahriman.application.handlers.shell import Shell
 from ahriman.application.handlers.sign import Sign
 from ahriman.application.handlers.status import Status
 from ahriman.application.handlers.status_update import StatusUpdate
@@ -39,4 +40,5 @@ from ahriman.application.handlers.triggers import Triggers
 from ahriman.application.handlers.unsafe_commands import UnsafeCommands
 from ahriman.application.handlers.update import Update
 from ahriman.application.handlers.users import Users
+from ahriman.application.handlers.versions import Versions
 from ahriman.application.handlers.web import Web

src/ahriman/application/handlers/shell.py

@@ -0,0 +1,59 @@
+#
+# Copyright (c) 2021-2022 ahriman team.
+#
+# This file is part of ahriman
+# (see https://github.com/arcan1s/ahriman).
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+import argparse
+import code
+import sys
+
+from pathlib import Path
+from typing import Type
+
+from ahriman.application.application import Application
+from ahriman.application.handlers import Handler
+from ahriman.core.configuration import Configuration
+from ahriman.core.formatters import StringPrinter
+
+
+class Shell(Handler):
+    """
+    python shell handler
+    """
+
+    ALLOW_MULTI_ARCHITECTURE_RUN = False
+
+    @classmethod
+    def run(cls: Type[Handler], args: argparse.Namespace, architecture: str,
+            configuration: Configuration, no_report: bool, unsafe: bool) -> None:
+        """
+        callback for command line
+
+        Args:
+            args(argparse.Namespace): command line args
+            architecture(str): repository architecture
+            configuration(Configuration): configuration instance
+            no_report(bool): force disable reporting
+            unsafe(bool): if set no user check will be performed before path creation
+        """
+        # pylint: disable=possibly-unused-variable
+        application = Application(architecture, configuration, no_report, unsafe)
+        if args.verbose:
+            # licensed by https://creativecommons.org/licenses/by-sa/3.0
+            path = Path(sys.prefix) / "share" / "ahriman" / "templates" / "shell"
+            StringPrinter(path.read_text(encoding="utf8")).print(verbose=False)
+        code.interact(local=locals())

src/ahriman/application/handlers/versions.py

@@ -0,0 +1,87 @@
+#
+# Copyright (c) 2021-2022 ahriman team.
+#
+# This file is part of ahriman
+# (see https://github.com/arcan1s/ahriman).
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+import argparse
+import pkg_resources
+import sys
+
+from typing import Dict, List, Tuple, Type
+
+from ahriman import version
+from ahriman.application.handlers import Handler
+from ahriman.core.configuration import Configuration
+from ahriman.core.formatters import VersionPrinter
+
+
+class Versions(Handler):
+    """
+    version handler
+    """
+
+    ALLOW_AUTO_ARCHITECTURE_RUN = False  # it should be called only as "no-architecture"
+
+    @classmethod
+    def run(cls: Type[Handler], args: argparse.Namespace, architecture: str,
+            configuration: Configuration, no_report: bool, unsafe: bool) -> None:
+        """
+        callback for command line
+
+        Args:
+            args(argparse.Namespace): command line args
+            architecture(str): repository architecture
+            configuration(Configuration): configuration instance
+            no_report(bool): force disable reporting
+            unsafe(bool): if set no user check will be performed before path creation
+        """
+        VersionPrinter(f"Module version {version.__version__}",
+                       {"Python": sys.version}).print(verbose=False, separator=" ")
+        packages = Versions.package_dependencies("ahriman", ("pacman", "s3", "web"))
+        VersionPrinter("Installed packages", packages).print(verbose=False, separator=" ")
+
+    @staticmethod
+    def package_dependencies(root: str, root_extras: Tuple[str, ...] = ()) -> Dict[str, str]:
+        """
+        extract list of ahriman package dependencies installed into system with their versions
+
+        Args:
+            root(str): root package name
+            root_extras(Tuple[str, ...]): extras for the root package (Default value = ())
+
+        Returns:
+            Dict[str, str]: map of installed dependency to its version
+        """
+        resources: Dict[str, pkg_resources.Distribution] = pkg_resources.working_set.by_key  # type: ignore
+
+        def dependencies_by_key(key: str, extras: Tuple[str, ...] = ()) -> List[str]:
+            return [entry.key for entry in resources[key].requires(extras)]
+
+        keys: List[str] = []
+        portion = {key for key in dependencies_by_key(root, root_extras) if key in resources}
+        while portion:
+            keys.extend(portion)
+            portion = {
+                key
+                for key in sum([dependencies_by_key(key) for key in portion], start=[])
+                if key not in keys and key in resources
+            }
+
+        return {
+            resource.project_name: resource.version
+            for resource in map(lambda key: resources[key], keys)
+        }

src/ahriman/core/formatters/__init__.py

@@ -27,3 +27,4 @@ from ahriman.core.formatters.package_printer import PackagePrinter
 from ahriman.core.formatters.status_printer import StatusPrinter
 from ahriman.core.formatters.update_printer import UpdatePrinter
 from ahriman.core.formatters.user_printer import UserPrinter
+from ahriman.core.formatters.version_printer import VersionPrinter

src/ahriman/core/formatters/string_printer.py

@@ -25,6 +25,9 @@ from ahriman.core.formatters import Printer
 class StringPrinter(Printer):
     """
     print content of the random string
+
+    Attributes:
+        content(str): any content string
     """
 
     def __init__(self, content: str) -> None:

src/ahriman/core/formatters/version_printer.py

@@ -0,0 +1,55 @@
+#
+# Copyright (c) 2021-2022 ahriman team.
+#
+# This file is part of ahriman
+# (see https://github.com/arcan1s/ahriman).
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+from typing import Dict, List
+
+from ahriman.core.formatters import StringPrinter
+from ahriman.models.property import Property
+
+
+class VersionPrinter(StringPrinter):
+    """
+    print content of the python package versions
+
+    Attributes:
+        packages(Dict[str, str]): map of package name to its version
+    """
+
+    def __init__(self, title: str, packages: Dict[str, str]) -> None:
+        """
+        default constructor
+
+        Args:
+            title(str): title of the message
+            packages(Dict[str, str]): map of package name to its version
+        """
+        StringPrinter.__init__(self, title)
+        self.packages = packages
+
+    def properties(self) -> List[Property]:
+        """
+        convert content into printable data
+
+        Returns:
+            List[Property]: list of content properties
+        """
+        return [
+            Property(package, version, is_required=True)
+            for package, version in sorted(self.packages.items())
+        ]

src/ahriman/core/util.py

@@ -18,7 +18,10 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 import datetime
+import io
 import os
+from enum import Enum
+
 import requests
 import shutil
 import subprocess
@@ -27,14 +30,14 @@ import tempfile
 from contextlib import contextmanager
 from logging import Logger
 from pathlib import Path
-from typing import Any, Dict, Generator, Iterable, List, Optional, Union
+from typing import Any, Dict, Generator, IO, Iterable, List, Optional, Type, Union
 
 from ahriman.core.exceptions import InvalidOption, UnsafeRun
 from ahriman.models.repository_paths import RepositoryPaths
 
 
-__all__ = ["check_output", "check_user", "exception_response_text", "filter_json", "full_version", "package_like",
-           "pretty_datetime", "pretty_size", "tmpdir", "walk"]
+__all__ = ["check_output", "check_user", "exception_response_text", "filter_json", "full_version", "enum_values",
+           "package_like", "pretty_datetime", "pretty_size", "tmpdir", "walk"]
 
 
 def check_output(*args: str, exception: Optional[Exception], cwd: Optional[Path] = None,
@@ -73,6 +76,11 @@ def check_output(*args: str, exception: Optional[Exception], cwd: Optional[Path]
 
             >>> check_output("false", exception=RuntimeError("An exception occurred"))
     """
+    # hack for Optional[IO[str]] handle
+    def get_io(proc: subprocess.Popen[str], channel_name: str) -> IO[str]:
+        channel: Optional[IO[str]] = getattr(proc, channel_name, None)
+        return channel if channel is not None else io.StringIO()
+
     def log(single: str) -> None:
         if logger is not None:
             logger.debug(single)
@@ -80,14 +88,15 @@ def check_output(*args: str, exception: Optional[Exception], cwd: Optional[Path]
     # FIXME additional workaround for linter and type check which do not know that user arg is supported
     # pylint: disable=unexpected-keyword-arg
     with subprocess.Popen(args, cwd=cwd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                          user=user, text=True, encoding="utf8", bufsize=1) as process:  # type: ignore
+                          user=user, text=True, encoding="utf8", bufsize=1) as process:
         if input_data is not None:
-            process.stdin.write(input_data)
-            process.stdin.close()
+            input_channel = get_io(process, "stdin")
+            input_channel.write(input_data)
+            input_channel.close()
 
         # read stdout and append to output result
         result: List[str] = []
-        for line in iter(process.stdout.readline, ""):
+        for line in iter(get_io(process, "stdout").readline, ""):
             line = line.strip()
             if not line:  # skip empty lines
                 continue
@@ -95,7 +104,7 @@ def check_output(*args: str, exception: Optional[Exception], cwd: Optional[Path]
             log(line)
 
         # read stderr and write info to logs
-        for line in iter(process.stderr.readline, ""):
+        for line in iter(get_io(process, "stderr").readline, ""):
             log(line.strip())
 
         process.terminate()  # make sure that process is terminated
@@ -134,6 +143,19 @@ def check_user(paths: RepositoryPaths, unsafe: bool) -> None:
         raise UnsafeRun(current_uid, root_uid)
 
 
+def enum_values(enum: Type[Enum]) -> List[str]:
+    """
+    generate list of enumeration values from the source
+
+    Args:
+        enum(Type[Enum]): source enumeration class
+
+    Returns:
+        List[str]: available enumeration values as string
+    """
+    return [key.value for key in enum]
+
+
 def exception_response_text(exception: requests.exceptions.HTTPError) -> str:
     """
     safe response exception text generation

tests/ahriman/application/handlers/test_handler_shell.py

@@ -0,0 +1,48 @@
+import argparse
+import pytest
+
+from pytest_mock import MockerFixture
+
+from ahriman.application.handlers import Shell
+from ahriman.core.configuration import Configuration
+
+
+def _default_args(args: argparse.Namespace) -> argparse.Namespace:
+    """
+    default arguments for these test cases
+
+    Args:
+        args(argparse.Namespace): command line arguments fixture
+
+    Returns:
+        argparse.Namespace: generated arguments for these test cases
+    """
+    args.verbose = False
+    return args
+
+
+def test_run(args: argparse.Namespace, configuration: Configuration, mocker: MockerFixture) -> None:
+    """
+    must run command
+    """
+    args = _default_args(args)
+    mocker.patch("ahriman.models.repository_paths.RepositoryPaths.tree_create")
+    application_mock = mocker.patch("code.interact")
+
+    Shell.run(args, "x86_64", configuration, True, False)
+    application_mock.assert_called_once_with(local=pytest.helpers.anyvar(int))
+
+
+def test_run_verbose(args: argparse.Namespace, configuration: Configuration, mocker: MockerFixture) -> None:
+    """
+    must run command with verbose option
+    """
+    args = _default_args(args)
+    args.verbose = True
+    mocker.patch("ahriman.models.repository_paths.RepositoryPaths.tree_create")
+    print_mock = mocker.patch("ahriman.core.formatters.Printer.print")
+    application_mock = mocker.patch("code.interact")
+
+    Shell.run(args, "x86_64", configuration, True, False)
+    application_mock.assert_called_once_with(local=pytest.helpers.anyvar(int))
+    print_mock.assert_called_once_with(verbose=False)

tests/ahriman/application/handlers/test_handler_versions.py

@@ -0,0 +1,38 @@
+import argparse
+
+from pytest_mock import MockerFixture
+from unittest import mock
+
+from ahriman.application.handlers import Versions
+from ahriman.core.configuration import Configuration
+
+
+def test_run(args: argparse.Namespace, configuration: Configuration, mocker: MockerFixture) -> None:
+    """
+    must run command
+    """
+    application_mock = mocker.patch("ahriman.application.handlers.Versions.package_dependencies")
+    print_mock = mocker.patch("ahriman.core.formatters.Printer.print")
+
+    Versions.run(args, "x86_64", configuration, True, False)
+    application_mock.assert_called_once_with("ahriman", ("pacman", "s3", "web"))
+    print_mock.assert_has_calls([mock.call(verbose=False, separator=" "), mock.call(verbose=False, separator=" ")])
+
+
+def test_package_dependencies() -> None:
+    """
+    must extract package dependencies
+    """
+    packages = Versions.package_dependencies("srcinfo")
+    assert packages
+    assert packages.get("parse") is not None
+
+
+def test_package_dependencies_missing() -> None:
+    """
+    must extract package dependencies even if some of them are missing
+    """
+    packages = Versions.package_dependencies("ahriman", ("docs", "pacman", "s3", "web"))
+    assert packages
+    assert packages.get("pyalpm") is not None
+    assert packages.get("Sphinx") is None

tests/ahriman/application/test_ahriman.py

@@ -492,6 +492,15 @@ def test_subparsers_repo_update_architecture(parser: argparse.ArgumentParser) ->
     assert args.architecture == ["x86_64"]
 
 
+def test_subparsers_shell(parser: argparse.ArgumentParser) -> None:
+    """
+    shell command must imply lock and no-report
+    """
+    args = parser.parse_args(["shell"])
+    assert args.lock is None
+    assert args.no_report
+
+
 def test_subparsers_user_add(parser: argparse.ArgumentParser) -> None:
     """
     user-add command must imply action, architecture, lock, no-report, quiet and unsafe
@@ -575,6 +584,26 @@ def test_subparsers_user_remove_architecture(parser: argparse.ArgumentParser) ->
     assert args.architecture == [""]
 
 
+def test_subparsers_version(parser: argparse.ArgumentParser) -> None:
+    """
+    version command must imply architecture, lock, no-report, quiet and unsafe
+    """
+    args = parser.parse_args(["version"])
+    assert args.architecture == [""]
+    assert args.lock is None
+    assert args.no_report
+    assert args.quiet
+    assert args.unsafe
+
+
+def test_subparsers_version_architecture(parser: argparse.ArgumentParser) -> None:
+    """
+    version command must correctly parse architecture list
+    """
+    args = parser.parse_args(["-a", "x86_64", "version"])
+    assert args.architecture == [""]
+
+
 def test_subparsers_web(parser: argparse.ArgumentParser) -> None:
     """
     web command must imply lock, no_report and parser

tests/ahriman/core/formatters/conftest.py

@@ -1,6 +1,7 @@
 import pytest
 
-from ahriman.core.formatters import AurPrinter, ConfigurationPrinter, PackagePrinter, StatusPrinter, StringPrinter, UpdatePrinter, UserPrinter
+from ahriman.core.formatters import AurPrinter, ConfigurationPrinter, PackagePrinter, StatusPrinter, StringPrinter, \
+    UpdatePrinter, UserPrinter, VersionPrinter
 from ahriman.models.aur_package import AURPackage
 from ahriman.models.build_status import BuildStatus
 from ahriman.models.package import Package
@@ -94,3 +95,17 @@ def user_printer(user: User) -> UserPrinter:
         UserPrinter: user printer test instance
     """
     return UserPrinter(user)
+
+
+@pytest.fixture
+def version_printer(package_ahriman: Package) -> VersionPrinter:
+    """
+    fixture for version printer
+
+    Args:
+        package_ahriman(Package): package fixture
+
+    Returns:
+        VersionPrinter: version printer test instance
+    """
+    return VersionPrinter("package", {package_ahriman.base: package_ahriman.version})

tests/ahriman/core/formatters/test_version_printer.py

@@ -0,0 +1,15 @@
+from ahriman.core.formatters import VersionPrinter
+
+
+def test_properties(version_printer: VersionPrinter) -> None:
+    """
+    must return empty properties list
+    """
+    assert version_printer.properties()
+
+
+def test_title(version_printer: VersionPrinter) -> None:
+    """
+    must return non empty title
+    """
+    assert version_printer.title() is not None

tests/ahriman/core/test_util.py

@@ -10,8 +10,9 @@ from unittest.mock import MagicMock
 
 from ahriman.core.exceptions import BuildFailed, InvalidOption, UnsafeRun
 from ahriman.core.util import check_output, check_user, exception_response_text, filter_json, full_version, \
-    package_like, pretty_datetime, pretty_size, tmpdir, walk
+    enum_values, package_like, pretty_datetime, pretty_size, tmpdir, walk
 from ahriman.models.package import Package
+from ahriman.models.package_source import PackageSource
 from ahriman.models.repository_paths import RepositoryPaths
 
 
@@ -177,6 +178,15 @@ def test_filter_json_empty_value(package_ahriman: Package) -> None:
     assert "base" not in filter_json(probe, probe.keys())
 
 
+def test_enum_values() -> None:
+    """
+    must correctly generate choices from enumeration classes
+    """
+    values = enum_values(PackageSource)
+    for value in values:
+        assert PackageSource(value).value == value
+
+
 def test_full_version() -> None:
     """
     must construct full version
@@ -331,6 +341,7 @@ def test_walk(resource_path_root: Path) -> None:
         resource_path_root / "web" / "templates" / "build-status.jinja2",
         resource_path_root / "web" / "templates" / "email-index.jinja2",
         resource_path_root / "web" / "templates" / "repo-index.jinja2",
+        resource_path_root / "web" / "templates" / "shell",
         resource_path_root / "web" / "templates" / "telegram-index.jinja2",
     ])
     local_files = list(sorted(walk(resource_path_root)))