Removed license classifier in favor of SPDX entry.

Initialization of the device must be done after device is detached from
kernel, otherwise exception will be thrown about device is busy message.

.gitignore

@@ -0,0 +1,3 @@
+.venv
+*.egg-info
+build

README.rst

@@ -2,6 +2,9 @@
 Linak-ctrl
 ==========
 
+.. image:: https://badge.fury.io/py/linak-ctrl.svg
+   :target: https://badge.fury.io/py/linak-ctrl
+
 Simple python script to control Linak powered desks and USB2LIN06 cable.
 
 
@@ -14,6 +17,31 @@ Requirements
 * `pyusb`_
 
 
+Installation
+============
+
+There are couple of different ways for installing ``linak-ctrl``. One of the
+preferred ways is to use virtualenv and pip:
+
+.. code:: shell-session
+
+   $ git clone https://github.com/gryf/linak-ctrl
+   $ cd linak-ctrl
+   linak-ctrl $ python -m venv linak
+   (linak) linak-ctrl $ pip install .
+   (linak) linak-ctrl $ linak-ctrl status
+   Position: 767, height: 78.80cm, moving: False
+
+Or, you can install it system-wide:
+
+.. code:: shell-session
+
+   # sudo pip install linak-ctrl
+
+And finally, you could also install dependences from your system repositories,
+and use script directly, by placing it somewhere in your ``$PATH``.
+
+
 Usage
 =====
 
@@ -24,7 +52,7 @@ number, and in centimeters, and information if desk is moving.
 
 .. code:: shell-session
 
-   $ linak_ctrl.py status
+   $ linak_ctrl/__init__.py status
    Position: 767, height: 78.80cm, moving: False
 
 Note, that height was measured manually and may differ depending if desk have
@@ -35,7 +63,7 @@ information from USB2LIN06 device every 0.2 seconds:
 
 .. code:: shell-session
 
-   $ linak_ctrl.py status -l
+   $ linak_ctrl/__init__.py status -l
    Position: 2161, height: 100.25cm, moving: True
    Position: 2109, height: 99.45cm, moving: True
    Position: 2026, height: 98.17cm, moving: True
@@ -53,14 +81,14 @@ my case). For example:
 
 .. code:: shell-session
 
-   $ linak_ctrl.py move 1000
+   $ linak_ctrl/__init__.py move 1000
 
 For displaying debug information verbosity can be increased using ``--verbose``
 parameter:
 
 .. code:: shell-session
 
-   $ linak_ctrl.py -v move 1000
+   $ linak_ctrl/__init__.py -v move 1000
    Current position: 771
    Current position: 792
    Current position: 825
@@ -73,7 +101,7 @@ Adding more `-v` will increase amount of information:
 
 .. code:: shell-session
 
-   $ linak_ctrl.py -vv move 1000
+   $ linak_ctrl/__init__.py -vv move 1000
    array('B', [4, 56, 17, 8, 3, 3, 0, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
    Current position: 771
    array('B', [4, 56, 17, 0, 21, 3, 0, 129, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])

linak_ctrl.py

@@ -111,6 +111,14 @@ class LinakDevice:
     def __init__(self):
         self._dev = usb.core.find(idVendor=LinakDevice.VEND,
                                   idProduct=LinakDevice.PROD)
+        if not self._dev:
+            raise ValueError(f'Device {LinakDevice.VEND}:'
+                             f'{LinakDevice.PROD:04d} '
+                             f'not found!')
+
+        # detach kernel driver, if attached
+        if self._dev.is_kernel_driver_active(0):
+            self._dev.detach_kernel_driver(0)
 
         # init device
         buf = [0 for _ in range(BUF_LEN)]
@@ -123,25 +131,18 @@ class LinakDevice:
         # hold a little bit, to make it effect.
         time.sleep(0.5)
 
-        # detach kernel driver, if attached
-        if self._dev.is_kernel_driver_active(0):
-            self._dev.detach_kernel_driver(0)
-
     def get_position(self, args):
-        if args.loop:
-            try:
-                while True:
-                    report = self._get_report()
-                    LOG.warning('Position: %s, height: %.2fcm, moving: %s',
-                                report.position, report.position_in_cm,
-                                report.moving)
-                    time.sleep(0.2)
-            except KeyboardInterrupt:
-                return
-        else:
-            report = self._get_report()
-            LOG.warning('Position: %s, height: %.2fcm, moving: %s',
-                        report.position, report.position_in_cm, report.moving)
+        try:
+            while True:
+                report = self._get_report()
+                LOG.warning('Position: %s, height: %.2fcm, moving: %s',
+                            report.position, report.position_in_cm,
+                            report.moving)
+                if not args.loop:
+                    break
+                time.sleep(0.2)
+        except KeyboardInterrupt:
+            return
 
     def move(self, args):
         retry_count = 3
@@ -191,7 +192,11 @@ class LinakDevice:
 
 
 def main():
-    device = LinakDevice()
+    try:
+        device = LinakDevice()
+    except ValueError as ex:
+        sys.stderr.write(ex.args[0] + '\n')
+        sys.exit(1)
 
     parser = argparse.ArgumentParser('An utility to interact with USB2LIN06 '
                                      'device.')

pyproject.toml

@@ -0,0 +1,42 @@
+[build-system]
+requires = ["setuptools >= 77.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "linak-ctrl"
+version = "1.0.5"
+requires-python = ">= 3.10"
+description = "Control Linak powered desks using USB2LIN06 cable."
+dependencies = [
+    "pyusb>=1.3.1"
+]
+readme = "README.rst"
+authors = [
+    {name = "Roman Dobosz", email = "gryf73@gmail.com"}
+]
+license = "BSD-3-Clause"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: End Users/Desktop",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: System :: Networking"
+]
+
+[tool.setuptools]
+py-modules = ["linak_ctrl"]
+
+[project.urls]
+Repository = "https://github.com/gryf/linak-ctrl"
+
+[project.scripts]
+linak-ctrl = "linak_ctrl:main"
+
+[tool.distutils.bdist_wheel]
+universal = true