Rellu and inv to set version

BUILD.rst

@@ -10,9 +10,10 @@ Releasing StatusChecker
 
 3. Update ``__version__`` in `<robotstatuschecker.py>`_::
 
-      sed -i "s/__version__ = .*/__version__ = '$VERSION'/" robotstatuschecker.py
+      inv set-version 1.5.0
       git diff  # verify changes
-      git commit -m "Updated __version__ to $VERSION" robotstatuschecker.py && git push
+      git commit -m "Updated __version__ to $VERSION" robotstatuschecker.py
+      git push
 
 4. Tag::
 
@@ -31,9 +32,10 @@ Releasing StatusChecker
 
 8. ``__version__`` back to ``devel``::
 
-      sed -i "s/__version__ = .*/__version__ = 'devel'/" robotstatuschecker.py
+      inv set-version devel
       git diff  # verify changes
-      git commit -m "__version__ back to devel" robotstatuschecker.py && git push
+      git commit -m "__version__ back to devel" robotstatuschecker.py
+      git push
 
 9. Advertise on mailing lists, `Twitter <https://twitter.com/robotframework>`_,
    `LinkedIn <https://www.linkedin.com/groups/3710899>`_, and elsewhere as

requirements-dev.txt

@@ -0,0 +1,5 @@
+invoke >= 1.4.1
+rellu >= 0.6
+twine >= 3.4.1
+wheel >= 0.36.2
+black >= 20.8b1

tasks.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+
+from invoke import task
+from rellu import initialize_labels, ReleaseNotesGenerator, Version
+from rellu.tasks import clean  # noqa
+
+VERSION_PATTERN = '__version__ = "(.*)"'
+REPOSITORY = "robotframework/statuschecker"
+VERSION_PATH = Path("robotstatuschecker.py")
+RELEASE_NOTES_PATH = Path("docs/releasenotes/robotstatuschecker-{version}.rst")
+RELEASE_NOTES_TITLE = "robotstatuschecker {version}"
+RELEASE_NOTES_INTRO = """
+StatusChecker is a tool for validating that executed `Robot Framework`_ test cases
+have expected statuses and log messages. It is mainly useful for Robot Framework
+test library developers who want to use Robot Framework to also test their libraries.
+StatusChecker 1.4 and newer are compatible both with Python 2 and Python 3.
+
+StatusChecker project is hosted at GitHub and downloads are at PyPI_
+.. _Robot Framework: http://robotframework.org
+.. _PyPI: https://github.com/robotframework/statuschecker
+.. _issue tracker: https://github.com/robotframework/SeleniumLibrary/issues?q=milestone%3A{version.milestone}
+"""
+
+@task
+def set_version(ctx, version):
+    """Set project version in `robotstatuschecker.py`` file.
+    Args:
+        version: Project version to set or ``dev`` to set development version.
+    Following PEP-440 compatible version numbers are supported:
+    - Final version like 3.0 or 3.1.2.
+    - Alpha, beta or release candidate with ``a``, ``b`` or ``rc`` postfix,
+      respectively, and an incremented number like 3.0a1 or 3.0.1rc1.
+    - Development version with ``.dev`` postfix and an incremented number like
+      3.0.dev1 or 3.1a1.dev2.
+    When the given version is ``dev``, the existing version number is updated
+    to the next suitable development version. For example, 3.0 -> 3.0.1.dev1,
+    3.1.1 -> 3.1.2.dev1, 3.2a1 -> 3.2a2.dev1, 3.2.dev1 -> 3.2.dev2.
+    """
+    version = Version(version, VERSION_PATH, VERSION_PATTERN)
+    version.write()
+    print(version)
+
+
+@task
+def print_version(ctx):
+    """Print the current project version."""
+    print(Version(path=VERSION_PATH, pattern=VERSION_PATTERN))