diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..fa2fb7b
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,18 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: flake8
+    versions:
+    - 3.9.0
+  - dependency-name: pytest
+    versions:
+    - 6.2.2
+  - dependency-name: mypy
+    versions:
+    - "0.800"
diff --git a/.github/workflows/bump.yaml b/.github/workflows/bump.yaml
new file mode 100644
index 0000000..bd81a49
--- /dev/null
+++ b/.github/workflows/bump.yaml
@@ -0,0 +1,22 @@
+name: Bump version
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  bump-version:
+    if: "!startsWith(github.event.head_commit.message, 'bump:')"
+    runs-on: ubuntu-latest
+    name: "Bump version and create changelog with commitizen"
+    steps:
+      - name: Check out
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
+      - name: Create bump and changelog
+        uses: commitizen-tools/commitizen-action@master
+        with:
+          github_token: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
new file mode 100644
index 0000000..d2f353e
--- /dev/null
+++ b/.github/workflows/publish.yaml
@@ -0,0 +1,33 @@
+name: Publish package to Pypi
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name: Setup python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'
+    - name: Install Poetry
+      uses: snok/install-poetry@v1
+      with:
+        version: latest
+        virtualenvs-in-project: true
+        virtualenvs-create: true
+    - name: Install Dependencies
+      run: |
+        poetry install
+    - name: Publish
+      env:
+        PYPI_USERNAME: ${{ secrets.PYPI_USERNAME }}
+        PYPI_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+      run: |
+        ./scripts/publish
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..5c85798
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,43 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+# We should restore the cache and remove extra requirements installations after this is resolved https://github.com/actions/setup-python/issues/182
+
+name: Tests
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          architecture: x64
+      - name: Install Poetry
+        uses: snok/install-poetry@v1
+        with:
+          version: latest
+          virtualenvs-in-project: true
+          virtualenvs-create: true
+      - name: Install Dependencies
+        run: |
+          poetry install --no-interaction
+      - name: Test and Lint
+        run: |
+          ./scripts/test
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          file: ./coverage.xml
+          flags: unittests
+          name: decli
+          fail_ci_if_error: true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..32a8994
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,111 @@
+# Text editors
+.vscode/
+todo
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+
+# ruff
+.ruff_cache
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..1ee57f5
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,47 @@
+# Change Log
+
+## v0.6.2 (2024-04-28)
+
+### Fix
+
+- add missing build-system
+
+## v0.6.1 (2023-06-03)
+
+### Fix
+
+- commitizen bumps version in decli/__init_.py
+
+## v0.6.0 (2023-04-28)
+
+### Feat
+
+- add py.typed
+
+### Fix
+
+- improve type hints
+
+## v0.5.2 (2020-07-26)
+
+### Fix
+
+- **application**: add required subcommand support for python 3.6
+
+# 0.5.1
+
+### Fixes
+
+* Logger changed from DEBUG to INFO
+
+# 0.5.0
+
+### Features
+
+* **arguments:** exclusive groups are now supported
+
+# 0.4.0
+
+### Features
+
+* **arguments:** it is possible to group arguments now
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9df6c5e
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Santiago
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..7509cea
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,701 @@
+======
+Decli
+======
+
+Minimal declarative cli tool.
+
+.. image:: https://img.shields.io/codecov/c/github/Woile/decli.svg?style=flat-square
+    :alt: Codecov
+    :target: https://codecov.io/gh/Woile/decli
+
+.. image:: https://img.shields.io/pypi/v/decli.svg?style=flat-square
+    :alt: PyPI
+    :target: https://pypi.org/project/decli/
+
+.. image:: https://img.shields.io/pypi/pyversions/decli.svg?style=flat-square
+    :alt: PyPI - Python Version
+    :target: https://pypi.org/project/decli/
+
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "prog": "myapp",
+        "description": "Process some integers.",
+        "arguments": [
+            {
+                "name": "integers",
+                "metavar": "N",
+                "type": int,
+                "nargs": "+",
+                "help": "an integer for the accumulator",
+            },
+            {
+                "name": "--sum",
+                "dest": "accumulate",
+                "action": "store_const",
+                "const": sum,
+                "default": max,
+                "help": "sum the integers (default: find the max)",
+            },
+        ],
+    }
+    parser = cli(data)
+    parser.parse_args()
+
+
+::
+
+    >> parser.print_help()
+    usage: myapp [-h] [--sum] N [N ...]
+
+    Process some integers.
+
+    positional arguments:
+    N           an integer for the accumulator
+
+    optional arguments:
+    -h, --help  show this help message and exit
+    --sum       sum the integers (default: find the max)
+
+
+::
+
+    In [4]: args = parser.parse_args("--sum 3 2 1".split())
+
+    In [5]: args.accumulate(args.integers)
+    Out[5]: 6
+
+
+.. contents::
+    :depth: 2
+
+
+About
+=====
+
+Decli is minimal wrapper around **argparse**.
+
+It's useful when writing big applications that have many arguments and subcommands, this way it'll be more clear.
+
+It's a minimal library to rapidly create an interface separated from your app.
+
+It's possible to use any argument from **argparse** and it works really well with it.
+
+Forget about copy pasting the argparse functions, if you are lazy like me, this library should be really handy!
+
+Many cases were tested, but it's possible that not everything was covered, so if you find anything, please report it.
+
+
+Installation
+============
+
+::
+
+    pip install -U decli
+
+or alternatively:
+
+::
+
+    poetry add decli
+
+
+Usage
+======
+
+Main cli
+--------
+
+Create the dictionary in which the cli tool is declared.
+
+The same arguments argparse use are accepted, except parents, which is ignored.
+
+- prog - The name of the program (default: sys.argv[0])
+- usage - The string describing the program usage (default: generated from arguments added to parser)
+- description - Text to display before the argument help (default: none)
+- epilog - Text to display after the argument help (default: none)
+- formatter_class - A class for customizing the help output
+- prefix_chars - The set of characters that prefix optional arguments (default: ‘-‘)
+- fromfile_prefix_chars - The set of characters that prefix files from which additional arguments should be read (default: None)
+- argument_default - The global default value for arguments (default: None)
+- conflict_handler - The strategy for resolving conflicting optionals (usually unnecessary)
+- add_help - Add a -h/--help option to the parser (default: True)
+- allow_abbrev - Allows long options to be abbreviated if the abbreviation is unambiguous. (default: True)
+
+More info in the `argparse page <https://docs.python.org/3/library/argparse.html#argumentparser-objects>`_
+
+Example:
+
+.. code-block:: python
+
+    data = {
+        "prog": "myapp",
+        "description": "This app does something cool",
+        "epilog": "And that's it"
+    }
+
+
+Arguments
+---------
+
+It's just a list with dictionaries. To add aliases just use a list instead of a string.
+
+Accepted values:
+
+
+- name: - Either a name or a list of option strings, e.g. foo or -f, --foo.
+- action - The basic type of action to be taken when this argument is encountered at the command line.
+- nargs - The number of command-line arguments that should be consumed.
+- const - A constant value required by some action and nargs selections.
+- default - The value produced if the argument is absent from the command line.
+- type - The type to which the command-line argument should be converted.
+- choices - A container of the allowable values for the argument.
+- required - Whether or not the command-line option may be omitted (optionals only).
+- help - A brief description of what the argument does.
+- metavar - A name for the argument in usage messages.
+- dest - The name of the attribute to be added to the object returned by parse_args().
+
+
+More info about `arguments <https://docs.python.org/3/library/argparse.html#the-add-argument-method>`_
+
+Example:
+
+.. code-block:: python
+
+    data = {
+        "prog": "myapp",
+        "description": "This app does something cool",
+        "epilog": "And that's it",
+        "arguments": [
+            {
+                "name": "--foo"
+            },
+            {
+                "name": ["-b", "--bar"]
+            }
+        ]
+    }
+
+
+Subcommands
+-----------
+
+Just a dictionary where the most important key is **commands** which is a list of the commands.
+
+
+Accepted values:
+
+
+- title - title for the sub-parser group in help output; by default “subcommands” if description is provided, otherwise uses title for positional arguments
+- description - description for the sub-parser group in help output, by default None
+- commands - list of dicts describing the commands. Same arguments as the **main cli** are supported. And **func** which is really important.
+- prog - usage information that will be displayed with sub-command help, by default the name of the program and any positional arguments before the subparser argument
+- action - the basic type of action to be taken when this argument is encountered at the command line
+- dest - name of the attribute under which sub-command name will be stored; by default None and no value is stored
+- required - Whether or not a subcommand must be provided, by default False.
+- help - help for sub-parser group in help output, by default None
+- metavar - string presenting available sub-commands in help; by default it is None and presents sub-commands in form {cmd1, cmd2, ..}
+
+
+More info about `subcommands <https://docs.python.org/3/library/argparse.html#sub-commands>`_
+
+Func
+~~~~
+
+Usually in a sub-command it's useful to specify to which function are they pointing to. That's why each command should have this parameter.
+
+
+When you are building an app which does multiple things, each function should be mapped to a command this way, using the **func** argument.
+
+Example:
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "prog": "myapp",
+        "description": "This app does something cool",
+        "epilog": "And that's it",
+        "subcommands": {
+            "title": "main",
+            "commands": [
+                {
+                    "name": "sum",
+                    "help": "new project",
+                    "func": sum,
+                    "arguments": [
+                        {
+                            "name": "integers",
+                            "metavar": "N",
+                            "type": int,
+                            "nargs": "+",
+                            "help": "an integer for the accumulator",
+                        },
+                        {"name": "--name", "nargs": "?"},
+                    ],
+                }
+            ]
+        }
+    }
+
+    parser = cli(data)
+    args = parser.parse_args(["sum 1 2 3".split()])
+    args.func(args.integers)  # Runs the sum of the integers
+
+Groups
+------
+
+Used to group the arguments based on conceptual groups. This only affects the shown **help**, nothing else.
+
+Example:
+
+.. code-block:: python
+
+    data = {
+        "prog": "app",
+        "arguments": [
+            {"name": "foo", "help": "foo help", "group": "group1"},
+            {"name": "choo", "help": "choo help", "group": "group1"},
+            {"name": "--bar", "help": "bar help", "group": "group2"},
+        ]
+    }
+    parser = cli(data)
+    parser.print_help()
+
+::
+
+    usage: app [-h] [--bar BAR] foo choo
+
+    optional arguments:
+    -h, --help  show this help message and exit
+
+    group1:
+    foo         foo help
+    choo        choo help
+
+    group2:
+    --bar BAR   bar help
+
+
+Exclusive Groups
+----------------
+
+A mutually exclusive group allows to execute only one **optional** argument (starting with :code:`--`) from the group.
+If the condition is not met, it will show an error.
+
+Example:
+
+.. code-block:: python
+
+    data = {
+        "prog": "app",
+        "arguments": [
+            {"name": "--foo", "help": "foo help", "exclusive_group": "group1"},
+            {"name": "--choo", "help": "choo help", "exclusive_group": "group1"},
+            {"name": "--bar", "help": "bar help", "exclusive_group": "group1"},
+        ]
+    }
+    parser = cli(data)
+    parser.print_help()
+
+::
+
+    usage: app [-h] [--foo FOO | --choo CHOO | --bar BAR]
+
+    optional arguments:
+    -h, --help   show this help message and exit
+    --foo FOO    foo help
+    --choo CHOO  choo help
+    --bar BAR    bar help
+
+::
+
+    In [1]: parser.parse_args("--foo 1 --choo 2".split())
+
+    usage: app [-h] [--foo FOO | --choo CHOO | --bar BAR]
+    app: error: argument --choo: not allowed with argument --foo
+
+
+Groups and Exclusive groups
+---------------------------
+
+It is not possible to have groups inside exclusive groups with **decli**.
+
+**Decli** will prevent from doing this by raising a :code:`ValueError`.
+
+It is possible to accomplish it with argparse, but the help message generated will be broken and the
+exclusion won't work.
+
+Parents
+-------
+
+Sometimes, several cli share a common set of arguments.
+
+Rather than repeating the definitions of these arguments,
+one or more parent clis with all the shared arguments can be passed
+to :code:`parents=argument` to cli.
+
+More info about `parents <https://docs.python.org/3/library/argparse.html#parents>`_
+
+Example:
+
+.. code-block:: python
+
+    parent_foo_data = {
+        "add_help": False,
+        "arguments": [{"name": "--foo-parent", "type": int}],
+    }
+    parent_bar_data = {
+        "add_help": False,
+        "arguments": [{"name": "--bar-parent", "type": int}],
+    }
+    parent_foo_cli = cli(parent_foo_data)
+    parent_bar_cli = cli(parent_bar_data)
+
+    parents = [parent_foo_cli, parent_bar_cli]
+
+    data = {
+        "prog": "app",
+        "arguments": [
+            {"name": "foo"}
+        ]
+    }
+    parser = cli(data, parents=parents)
+    parser.print_help()
+
+::
+
+    usage: app [-h] [--foo-parent FOO_PARENT] [--bar-parent BAR_PARENT] foo
+
+    positional arguments:
+    foo
+
+    optional arguments:
+    -h, --help            show this help message and exit
+    --foo-parent FOO_PARENT
+    --bar-parent BAR_PARENT
+
+
+Recipes
+=======
+
+Subcommands
+-----------------
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "prog": "myapp",
+        "formatter_class": argparse.RawDescriptionHelpFormatter,
+        "description": "The software has subcommands which you can use",
+        "subcommands": {
+            "title": "main",
+            "description": "main commands",
+            "commands": [
+                {
+                    "name": "all",
+                    "help": "check every values is true",
+                    "func": all
+                },
+                {
+                    "name": ["s", "sum"],
+                    "help": "new project",
+                    "func": sum,
+                    "arguments": [
+                        {
+                            "name": "integers",
+                            "metavar": "N",
+                            "type": int,
+                            "nargs": "+",
+                            "help": "an integer for the accumulator",
+                        },
+                        {"name": "--name", "nargs": "?"},
+                    ],
+                }
+            ],
+        },
+    }
+    parser = cli(data)
+    args = parser.parse_args(["sum 1 2 3".split()])
+    args.func(args.integers)  # Runs the sum of the integers
+
+
+Minimal
+-------
+
+This app does nothing, but it's the min we can have:
+
+.. code-block:: python
+
+    from decli import cli
+
+    parser = cli({})
+    parser.print_help()
+
+::
+
+    usage: ipython [-h]
+
+    optional arguments:
+    -h, --help  show this help message and exit
+
+
+Positional arguments
+--------------------
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "arguments": [
+            {
+                "name": "echo"
+            }
+        ]
+    }
+    parser = cli(data)
+    args = parser.parse_args(["foo"])
+
+::
+
+    In [11]: print(args.echo)
+    foo
+
+
+Positional arguments with type
+------------------------------
+
+When a type is specified, the argument will be treated as that type, otherwise it'll fail.
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "arguments": [
+            {
+                "name": "square",
+                "type": int
+            }
+        ]
+    }
+    parser = cli(data)
+    args = parser.parse_args(["1"])
+
+::
+
+    In [11]: print(args.echo)
+    1
+
+Optional arguments
+------------------
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "arguments": [
+            {
+                "name": "--verbose",
+                "help": "increase output verbosity"
+            }
+        ]
+    }
+    parser = cli(data)
+    args = parser.parse_args(["--verbosity 1"])
+
+::
+
+    In [11]: print(args.verbosity)
+    1
+
+    In [15]: args = parser.parse_args([])
+
+    In [16]: args
+    Out[16]: Namespace(verbose=None)
+
+
+Flags
+-----
+
+Flags are a boolean only (True/False) subset of options.
+
+.. code-block:: python
+
+    from decli import cli
+
+    data = {
+        "arguments": [
+            {
+                "name": "--verbose",
+                "action": "store_true",  # defaults to False
+            },
+            {
+                "name": "--noisy",
+                "action": "store_false",  # defaults to True
+            }
+        ]
+    }
+    parser = cli(data)
+
+
+
+
+Short options
+-------------
+
+Used to add short versions of the options.
+
+.. code-block:: python
+
+    data = {
+        "arguments": [
+            {
+                "name": ["-v", "--verbose"],
+                "help": "increase output verbosity"
+            }
+        ]
+    }
+
+
+Grouping
+--------
+
+This is only possible using **arguments**.
+
+Only affect the way the help gets displayed. You might be looking for subcommands.
+
+
+.. code-block:: python
+
+    data = {
+        "prog": "mycli",
+        "arguments": [
+            {
+                "name": "--save",
+                "group": "main",
+                "help": "This save belongs to the main group",
+            },
+            {
+                "name": "--remove",
+                "group": "main",
+                "help": "This remove belongs to the main group",
+            },
+        ],
+    }
+    parser = cli(data)
+    parser.print_help()
+
+::
+
+    usage: mycli [-h] [--save SAVE] [--remove REMOVE]
+
+    optional arguments:
+    -h, --help       show this help message and exit
+
+    main:
+    --save SAVE      This save belongs to the main group
+    --remove REMOVE  This remove belongs to the main group
+
+
+Exclusive group
+---------------
+
+This is only possible using **optional arguments**.
+
+
+.. code-block:: python
+
+    data = {
+        "prog": "mycli",
+        "arguments": [
+            {
+                "name": "--save",
+                "exclusive_group": "main",
+                "help": "This save belongs to the main group",
+            },
+            {
+                "name": "--remove",
+                "exclusive_group": "main",
+                "help": "This remove belongs to the main group",
+            },
+        ],
+    }
+    parser = cli(data)
+    parser.print_help()
+
+::
+
+    usage: mycli [-h] [--save SAVE | --remove REMOVE]
+
+    optional arguments:
+    -h, --help       show this help message and exit
+    --save SAVE      This save belongs to the main group
+    --remove REMOVE  This remove belongs to the main group
+
+
+Combining Positional and Optional arguments
+-------------------------------------------
+
+.. code-block:: python
+
+    data = {
+        "arguments": [
+            {
+                "name": "square",
+                "type": int,
+                "help": "display a square of a given number"
+            },
+            {
+                "name": ["-v", "--verbose"],
+                "action": "store_true",
+                "help": "increase output verbosity"
+            }
+        ]
+    }
+    parser = cli(data)
+
+    args = parser.parse_args()
+    answer = args.square**2
+    if args.verbose:
+        print(f"the square of {args.square} equals {answer}")
+    else:
+        print(answer)
+
+
+More Examples
+-------------
+
+Many examples from `argparse documentation <https://docs.python.org/3/library/argparse.html>`_
+are covered in test/examples.py
+
+
+Contributing
+============
+
+1. Clone the repo
+2. Install dependencies
+
+::
+
+    poetry install
+
+3. Run tests
+
+::
+
+    ./scripts/tests
+
+
+Contributing
+============
+
+**PRs are welcome!**
diff --git a/decli/__init__.py b/decli/__init__.py
new file mode 100644
index 0000000..17d0b54
--- /dev/null
+++ b/decli/__init__.py
@@ -0,0 +1,5 @@
+from .application import cli
+
+__version__ = "0.6.2"
+
+__all__ = ("cli",)
diff --git a/decli/application.py b/decli/application.py
new file mode 100644
index 0000000..3c5e042
--- /dev/null
+++ b/decli/application.py
@@ -0,0 +1,171 @@
+import argparse
+import logging
+from typing import Optional, Callable, Union
+from copy import deepcopy
+
+
+config: dict = {}
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
+
+
+def init_config():
+    return {"prefix_chars": "-"}
+
+
+def ensure_list(name: Union[str, list]) -> list:
+    if isinstance(name, str):
+        name = [name]
+    return name
+
+
+def has_many_and_is_optional(names: list) -> list:
+    """The arguments can have aliases only when they are optional.
+
+    If this is not the case, then it raises an error.
+    """
+    prefix_chars = config["prefix_chars"]
+    is_optional = all(name.startswith(tuple(prefix_chars)) for name in names)
+
+    if not is_optional and len(names) > 1:
+        msg = (
+            f"Only optional arguments (starting with {prefix_chars}) "
+            "can have aliases"
+        )
+        raise ValueError(msg)
+    return names
+
+
+def is_exclusive_group_or_not(arg: dict):
+    if "exclusive_group" in arg and "group" in arg:
+        msg = "choose group or exclusive_group not both."
+        raise ValueError(msg)
+
+
+def validate_args(args: list):
+    for arg in args:
+        arg["name"] = ensure_list(arg["name"])
+        has_many_and_is_optional(arg["name"])
+        is_exclusive_group_or_not(arg)
+        yield arg
+
+
+def get_or_create_group(
+    parser,
+    groups: dict,
+    title: Optional[str] = None,
+    description: Optional[str] = None,
+):
+    group_parser = groups.get(title)
+    if group_parser is None:
+        group_parser = parser.add_argument_group(title, description)
+        groups.update({title: group_parser})
+    return group_parser
+
+
+def get_or_create_exclusive_group(
+    parser, groups: dict, title: Optional[str] = None, required=False
+):
+    group_parser = groups.get(title)
+    if group_parser is None:
+        group_parser = parser.add_mutually_exclusive_group(required=required)
+        groups.update({title: group_parser})
+
+    return group_parser
+
+
+def add_arguments(parser, args: list):
+    groups: dict = {}
+    exclusive_groups: dict = {}
+
+    for arg in validate_args(args):
+        logger.debug("arg: %s", arg)
+
+        name: list = arg.pop("name")
+        group_title: Optional[str] = arg.pop("group", None)
+        exclusive_group_title: Optional[str] = arg.pop("exclusive_group", None)
+
+        _parser = parser
+        if exclusive_group_title:
+            logger.debug("Exclusive group: %s", exclusive_group_title)
+            _parser = get_or_create_exclusive_group(
+                parser, exclusive_groups, exclusive_group_title
+            )
+        elif group_title:
+            logger.debug("Group: %s", group_title)
+            _parser = get_or_create_group(parser, groups, group_title)
+
+        _parser.add_argument(*name, **arg)
+
+
+def add_subcommand(parser, command: dict):
+    args: list = command.pop("arguments", None)
+    func: Optional[Callable] = command.pop("func", None)
+
+    names: list = ensure_list(command.pop("name"))
+    name: str = names.pop(0)
+
+    if names:
+        command.update({"aliases": names})
+
+    command_parser = parser.add_parser(name, **command)
+
+    if func:
+        command_parser.set_defaults(func=func)
+    if args:
+        add_arguments(command_parser, args)
+
+
+def add_subparser(parser, subcommand: dict):
+    commands: list = subcommand.pop("commands")
+
+    # This design is for python 3.6 compatibility
+    if "required" in subcommand:
+        required = subcommand.pop("required")
+        subparser = parser.add_subparsers(**subcommand)
+        subparser.required = required
+    else:
+        subparser = parser.add_subparsers(**subcommand)
+
+    for command in commands:
+        add_subcommand(subparser, command)
+
+
+def add_parser(data: dict, parser_class: Callable, parents: Optional[list]):
+    if parents is None:
+        parents = []
+
+    args: Optional[list] = data.pop("arguments", None)
+    subcommands: Optional[dict] = data.pop("subcommands", None)
+
+    parser = parser_class(**data, parents=parents)
+
+    if args:
+        logger.debug("Adding arguments...")
+        add_arguments(parser, args)
+
+    if subcommands:
+        logger.debug("Adding subcommands...")
+        add_subparser(parser, subcommands)
+
+    return parser
+
+
+def cli(
+    data: dict,
+    parser_class: Callable = argparse.ArgumentParser,
+    parents: Optional[list] = None,
+):
+    """Create a cli application.
+
+    This is the entrypoint.
+    """
+    global config
+    config = init_config()
+    data = deepcopy(data)
+
+    if data.get("prefix_chars"):
+        config.update({"prefix_chars": data.get("prefix_chars")})
+
+    parser = add_parser(data, parser_class, parents)
+    return parser
diff --git a/decli/py.typed b/decli/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/examples/demo.py b/examples/demo.py
new file mode 100644
index 0000000..641905a
--- /dev/null
+++ b/examples/demo.py
@@ -0,0 +1,29 @@
+"""Simple app example"""
+from decli import cli
+
+data = {
+    "prog": "app",
+    "arguments": [
+        {"name": "--install", "action": "store_true", "group": "opas"},
+        {"name": "--purge", "action": "store_false", "group": "opas"},
+    ],
+    "subcommands": {
+        "title": "main",
+        "commands": [
+            {
+                "name": "commit",
+                "arguments": [
+                    {
+                        "name": "--bocha",
+                        "action": "store_true",
+                        "group": "opas",
+                    }
+                ],
+            }
+        ],
+    },
+}
+
+parser = cli(data)
+args = parser.parse_args()
+print(args)
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..d84ed26
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,885 @@
+# This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
+
+[[package]]
+name = "appnope"
+version = "0.1.3"
+description = "Disable App Nap on macOS >= 10.9"
+category = "dev"
+optional = false
+python-versions = "*"
+files = [
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+    {file = "appnope-0.1.3.tar.gz", hash = "sha256:02bd91c4de869fbb1e1c50aafc4098827a7a54ab2f39d9dcba6c9547ed920e24"},
+]
+
+[[package]]
+name = "backcall"
+version = "0.2.0"
+description = "Specifications for callback functions passed in to an API"
+category = "dev"
+optional = false
+python-versions = "*"
+files = [
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+]
+
+[[package]]
+name = "black"
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+    {file = "typed_ast-1.5.4.tar.gz", hash = "sha256:39e21ceb7388e4bb37f4c679d72707ed46c2fbf2a5609b8b8ebc4b067d977df2"},
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.5.0"
+description = "Backported and Experimental Type Hints for Python 3.7+"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "typing_extensions-4.5.0-py3-none-any.whl", hash = "sha256:fb33085c39dd998ac16d1431ebc293a8b3eedd00fd4a32de0ff79002c19511b4"},
+    {file = "typing_extensions-4.5.0.tar.gz", hash = "sha256:5cb5f4a79139d699607b3ef622a1dedafa84e115ab0024e0d9c044a9479ca7cb"},
+]
+
+[[package]]
+name = "urllib3"
+version = "1.26.15"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
+files = [
+    {file = "urllib3-1.26.15-py2.py3-none-any.whl", hash = "sha256:aa751d169e23c7479ce47a0cb0da579e3ede798f994f5816a74e4f4500dcea42"},
+    {file = "urllib3-1.26.15.tar.gz", hash = "sha256:8a388717b9476f934a21484e8c8e61875ab60644d29b9b39e11e4b9dc1c6b305"},
+]
+
+[package.extras]
+brotli = ["brotli (>=1.0.9)", "brotlicffi (>=0.8.0)", "brotlipy (>=0.6.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)", "urllib3-secure-extra"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
+[[package]]
+name = "wcwidth"
+version = "0.2.6"
+description = "Measures the displayed width of unicode strings in a terminal"
+category = "dev"
+optional = false
+python-versions = "*"
+files = [
+    {file = "wcwidth-0.2.6-py2.py3-none-any.whl", hash = "sha256:795b138f6875577cd91bba52baf9e445cd5118fd32723b460e30a0af30ea230e"},
+    {file = "wcwidth-0.2.6.tar.gz", hash = "sha256:a5220780a404dbe3353789870978e472cfe477761f06ee55077256e509b156d0"},
+]
+
+[[package]]
+name = "zipp"
+version = "3.15.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "zipp-3.15.0-py3-none-any.whl", hash = "sha256:48904fc76a60e542af151aded95726c1a5c34ed43ab4134b597665c86d7ad556"},
+    {file = "zipp-3.15.0.tar.gz", hash = "sha256:112929ad649da941c23de50f356a2b5570c954b65150642bccdd66bf194d224b"},
+]
+
+[package.extras]
+docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
+testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more-itertools", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)"]
+
+[metadata]
+lock-version = "2.0"
+python-versions = ">=3.7"
+content-hash = "e32f0e42d2eb164ff1d7045c3832c722d85d4a25a73c9f6a3aca9edab466a38f"
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0829a53
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,46 @@
+[tool.poetry]
+name = "decli"
+version = "0.6.2"
+description = "Minimal, easy-to-use, declarative cli tool"
+authors = ["Santiago Fraire <santiwilly@gmail.com>"]
+license = "MIT"
+readme = 'README.rst'
+
+[tool.poetry.dependencies]
+python = ">=3.7"
+
+[tool.poetry.group.dev.dependencies]
+ipython = "^7.16"
+ipdb = "^0.13.13"
+pytest = "^7.3.1"
+pytest-cov = "^4.0.0"
+black = "^23.3.0"
+mypy = "^1.2.0"
+codecov = "^2.1.13"
+ruff = "^0.0.263"
+
+[tool.ruff]
+line-length = 88
+ignore = [
+    "E501",
+    "D1",
+    "D415",
+]
+
+[tool.ruff.isort]
+known-first-party = ["decli", "tests"]
+
+[tool.commitizen]
+name = "cz_conventional_commits"
+tag_format = "v$version"
+version_type = "pep440"
+version_provider = "poetry"
+update_changelog_on_bump = true
+major_version_zero = true
+version_files = [
+    "decli/__init__.py:__version__",
+]
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
diff --git a/scripts/format b/scripts/format
new file mode 100755
index 0000000..e95d5d7
--- /dev/null
+++ b/scripts/format
@@ -0,0 +1,4 @@
+#!/bin/sh -e
+
+ruff decli tests --fix
+black decli/ tests/
diff --git a/scripts/publish b/scripts/publish
new file mode 100755
index 0000000..324db5e
--- /dev/null
+++ b/scripts/publish
@@ -0,0 +1,3 @@
+#!/bin/sh -e
+
+poetry publish --build -u "$PYPI_USERNAME" -p "$PYPI_PASSWORD"
diff --git a/scripts/test b/scripts/test
new file mode 100755
index 0000000..6eb6ddb
--- /dev/null
+++ b/scripts/test
@@ -0,0 +1,10 @@
+#!/bin/sh -e
+
+pr() {
+    poetry run python -m "$@"
+}
+
+pr pytest --cov-report term-missing --cov-report=xml:coverage.xml --cov=decli "${1:-tests}"
+pr black decli tests --check
+pr ruff decli/ tests/
+pr mypy decli/ tests/
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/examples.py b/tests/examples.py
new file mode 100644
index 0000000..45405a2
--- /dev/null
+++ b/tests/examples.py
@@ -0,0 +1,197 @@
+import argparse
+import textwrap
+from decli import cli
+
+
+def main_example():
+    """https://docs.python.org/3/library/argparse.html#example"""
+    data = {
+        "description": "Process some integers.",
+        "arguments": [
+            {
+                "name": "integers",
+                "metavar": "N",
+                "type": int,
+                "nargs": "+",
+                "help": "an integer for the accumulator",
+            },
+            {
+                "name": "--sum",
+                "dest": "accumulate",
+                "action": "store_const",
+                "const": sum,
+                "default": max,
+                "help": "sum the integers (default: find the max)",
+            },
+        ],
+    }
+    parser = cli(data)
+    return parser
+
+
+def complete_example():
+    data = {
+        "prog": "cz",
+        "formatter_class": argparse.RawDescriptionHelpFormatter,
+        "description": "The software does this and that",
+        "epilog": "This is the epilooogpoe  ",
+        "arguments": [
+            {
+                "name": "--debug",
+                "action": "store_true",
+                "default": False,
+                "help": "use debug mode",
+            },
+            {
+                "name": ["-v", "--version"],
+                "action": "store_true",
+                "default": False,
+                "help": "get the installed version",
+                "group": "ops",
+            },
+            {"name": "--save", "group": "ops"},
+        ],
+        "subcommands": {
+            "title": "main",
+            "description": "main commands",
+            "commands": [
+                {
+                    "name": "all",
+                    "help": "check every values is true",
+                    "func": all,
+                },
+                {
+                    "name": ["sum", "s"],
+                    "help": "new project",
+                    "func": sum,
+                    "arguments": [
+                        {
+                            "name": "integers",
+                            "metavar": "N",
+                            "type": int,
+                            "nargs": "+",
+                            "help": "an integer for the accumulator",
+                        },
+                        {"name": "--name", "nargs": "?"},
+                    ],
+                },
+            ],
+        },
+    }
+    parser = cli(data)
+    return parser
+
+
+def name_or_flags():
+    """https://docs.python.org/3/library/argparse.html#name-or-flags"""
+    data = {
+        "prog": "sti",
+        "arguments": [{"name": ["-f", "--foo"]}, {"name": "bar"}],
+    }
+    return data
+
+
+def compose_clis_using_parents():
+    """
+    Sometimes, several cli share a common set of arguments.
+    Rather than repeating the definitions of these arguments,
+    one or more parent clis with all the shared arguments can be passed
+    to parents= argument to cli.
+
+    https://docs.python.org/3/library/argparse.html#parents
+    """
+    parent_foo_data = {
+        "add_help": False,
+        "arguments": [{"name": "--foo-parent", "type": int}],
+    }
+    parent_bar_data = {
+        "add_help": False,
+        "arguments": [{"name": "--bar-parent", "type": int}],
+    }
+    parent_foo_cli = cli(parent_foo_data)
+    parent_bar_cli = cli(parent_bar_data)
+
+    parents = [parent_foo_cli, parent_bar_cli]
+    return parents
+
+
+def using_formatter_class():
+    """https://docs.python.org/3/library/argparse.html#formatter-class"""
+    data = {
+        "prog": "PROG",
+        "formatter_class": argparse.RawDescriptionHelpFormatter,
+        "description": textwrap.dedent(
+            """\
+            Please do not mess up this text!
+            --------------------------------
+                I have indented it
+                exactly the way
+                I want it
+            """
+        ),
+    }
+    return data
+
+
+def prefix_chars():
+    data = {
+        "prog": "PROG",
+        "prefix_chars": "+",
+        "arguments": [{"name": ["+f", "++foo"]}, {"name": "++bar"}],
+    }
+    return data
+
+
+def grouping_arguments():
+    data = {
+        "prog": "mycli",
+        "arguments": [
+            {
+                "name": "--new",
+                "help": "This does not belong to a group but its a long help",
+            },
+            {
+                "name": "--init",
+                "help": "This does not belong to a group but its a long help",
+            },
+            {
+                "name": "--run",
+                "group": "app",
+                "help": "This does not belong to a group",
+            },
+            {
+                "name": "--build",
+                "group": "app",
+                "help": "This does not belong to a group",
+            },
+            {
+                "name": ["--install", "--add"],
+                "group": "package",
+                "metavar": "package_name",
+                "nargs": "+",
+                "help": "This belongs to a group",
+            },
+            {
+                "name": "--remove",
+                "group": "package",
+                "help": "This belongs to a group",
+            },
+            {
+                "name": "--why",
+                "group": "package",
+                "help": "This belongs to a group",
+            },
+        ],
+    }
+    return data
+
+
+def exclusive_group():
+    data = {
+        "prog": "app",
+        "arguments": [
+            {"name": "--install", "exclusive_group": "ops"},
+            {"name": "--purge", "exclusive_group": "ops"},
+        ],
+    }
+    return data
diff --git a/tests/test_decli.py b/tests/test_decli.py
new file mode 100644
index 0000000..267deb4
--- /dev/null
+++ b/tests/test_decli.py
@@ -0,0 +1,198 @@
+"""Most of argparse examples rebuilt with climp."""
+import pytest
+import argparse
+from . import examples
+from decli import cli
+import unittest
+
+
+class Test(unittest.TestCase):
+    def test_main_example_ok(self):
+        parser = examples.main_example()
+        args = parser.parse_args("1 2 3 4".split())
+
+        assert args.accumulate(args.integers) == 4
+
+    def test_main_example_sums_ok(self):
+        parser = examples.main_example()
+        args = parser.parse_args("1 2 3 4 --sum".split())
+
+        assert args.accumulate(args.integers) == 10
+
+    def test_main_example_fails(self):
+        parser = examples.main_example()
+
+        with pytest.raises(SystemExit):
+            args = parser.parse_args("a b c".split())
+            args.accumulate(args.integers)
+
+    def test_complete_example(self):
+        parser = examples.complete_example()
+        args = parser.parse_args("sum 1 2 3".split())
+
+        assert args.func(args.integers) == 6
+
+    def test_compose_clis_using_parents(self):
+        data = {"prog": "daddy", "arguments": [{"name": "something"}]}
+        parents = examples.compose_clis_using_parents()
+        parser = cli(data, parents=parents)
+        args = parser.parse_args(["--foo-parent", "2", "XXX"])
+
+        assert args.something == "XXX"
+        assert args.foo_parent == 2
+
+    def test_compose_clis_using_parents_and_arguments(self):
+        data = {"prog": "daddy", "arguments": [{"name": "--something"}]}
+        parents = examples.compose_clis_using_parents()
+        parser = cli(data, parents=parents)
+        args = parser.parse_args(["--something", "XXX"])
+
+        assert args.something == "XXX"
+
+    def test_prefix_chars(self):
+        data = examples.prefix_chars()
+        parser = cli(data)
+        args = parser.parse_args("+f X ++bar Y".split())
+
+        assert args.foo == "X"
+        assert args.bar == "Y"
+
+    def test_name_or_flags(self):
+        data = examples.name_or_flags()
+        parser = cli(data)
+
+        args = parser.parse_args(["HELLO"])
+        assert args.bar == "HELLO"
+
+        args = parser.parse_args(["BAR", "--foo", "FOO"])
+        assert args.bar == "BAR"
+        assert args.foo == "FOO"
+
+    def test_name_or_flags_fail(self):
+        data = examples.name_or_flags()
+        parser = cli(data)
+        with pytest.raises(SystemExit):
+            parser.parse_args(["--foo", "FOO"])
+
+    def test_cli_no_args(self):
+        data = {"prog": "daddy", "description": "helloo"}
+        parser = cli(data)
+        args = parser.parse_args([])
+
+        assert args.__dict__ == {}
+
+    def test_groups(self):
+        data = examples.grouping_arguments()
+        parser = cli(data)
+        help_result = parser.format_help()
+
+        assert "app" in help_result
+        assert "package" in help_result
+
+    def test_not_optional_arg_name_validation_fails(self):
+        data = {"arguments": [{"name": ["f", "foo"]}]}
+        with pytest.raises(ValueError):
+            cli(data)
+
+    def test_exclusive_group_ok(self):
+        data = {
+            "prog": "app",
+            "arguments": [
+                {
+                    "name": "--install",
+                    "action": "store_true",
+                    "exclusive_group": "ops",
+                },
+                {
+                    "name": "--purge",
+                    "action": "store_true",
+                    "exclusive_group": "ops",
+                },
+            ],
+        }
+        parser = cli(data)
+        args = parser.parse_args(["--install"])
+        assert args.install is True
+        assert args.purge is False
+
+    def test_exclusive_group_fails_when_same_group_called(self):
+        data = {
+            "prog": "app",
+            "arguments": [
+                {
+                    "name": "--install",
+                    "action": "store_true",
+                    "exclusive_group": "opas",
+                },
+                {
+                    "name": "--purge",
+                    "action": "store_true",
+                    "exclusive_group": "opas",
+                },
+            ],
+        }
+
+        parser = cli(data)
+        with pytest.raises(SystemExit):
+            parser.parse_args("--install --purge".split())
+
+    def test_exclusive_group_and_group_together_fail(self):
+        """
+        Note:
+
+        Exclusive group requires at least one arg before adding groups
+        """
+        data = {
+            "prog": "app",
+            "arguments": [
+                {
+                    "name": "--install",
+                    "action": "store_true",
+                    "exclusive_group": "ops",
+                    "group": "cmd",
+                },
+                {
+                    "name": "--purge",
+                    "action": "store_true",
+                    "exclusive_group": "ops",
+                    "group": "cmd",
+                },
+                {"name": "--fear", "exclusive_group": "ops"},
+            ],
+        }
+
+        with pytest.raises(ValueError):
+            cli(data)
+
+    def test_subcommand_required(self):
+        data = {
+            "prog": "cz",
+            "description": (
+                "Commitizen is a cli tool to generate conventional commits.\n"
+                "For more information about the topic go to "
+                "https://conventionalcommits.org/"
+            ),
+            "formatter_class": argparse.RawDescriptionHelpFormatter,
+            "arguments": [
+                {"name": "--debug", "action": "store_true", "help": "use debug mode"},
+                {
+                    "name": ["-n", "--name"],
+                    "help": "use the given commitizen (default: cz_conventional_commits)",
+                },
+            ],
+            "subcommands": {
+                "title": "commands",
+                "required": True,
+                "commands": [
+                    {
+                        "name": ["init"],
+                        "help": "init commitizen configuration",
+                    }
+                ],
+            },
+        }
+
+        parser = cli(data)
+        args = parser.parse_args(["-n", "cz_jira", "init"])
+        assert args.debug is False
+        assert args.name == "cz_jira"