Add setuptools_scm for pyproject.toml, setup.cfg and setup.py

eessi/testsuite/__init__.py

@@ -0,0 +1,16 @@
+# If this is an installed package, setuptools_scm should have written the file _version.py in the current directory
+try:
+    from ._version import __version__
+except ImportError:
+    # Fallback for when the package is not installed, but git cloned. Note that this requires setuptools_scm to be
+    # available as a runtime dependency
+    try:
+        from setuptools_scm import get_version
+        # Using a relative path for relative_to doesn't work, because it will be relative to the current working
+        # directory (which could be anywhere)
+        # __file__ is the location of this init file (a full path), and this gives us a predictable path to the root
+        # (namely: two levels up)
+        # Note that if we ever move this __init__ file relative to the root of the git tree, we'll need to adjust this
+        __version__ = get_version(root='../..', relative_to=__file__)
+    except ImportError:
+        __version__ = "0.0.0"  # fallback version if setuptools_scm is not available

pyproject.toml

@@ -1,21 +1,27 @@
 [build-system]
-requires = ["setuptools"]
+# Setuptools_scm<7 to be compatible with Python 3.6
+requires = ["setuptools>=42", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "eessi-testsuite"
-version = "0.3.2"
 description = "Test suite for the EESSI software stack"
 readme = "README.md"
 license = {file = "LICENSE"}
 classifiers = [
   "Programming Language :: Python"
 ]
 requires-python = ">=3.6"
+dynamic = ["version"]
 
 [project.urls]
 "Homepage" = "https://eessi.io/docs/test-suite"
 "Bug Tracker" = "https://github.com/EESSI/test-suite/issues"
 
 [tool.setuptools.packages.find]
 include = ["eessi*"]
+
+[tool.setuptools_scm]
+version_scheme = "guess-next-dev"
+local_scheme = "node-and-date"
+write_to = "eessi/testsuite/_version.py"

setup.cfg

@@ -1,6 +1,5 @@
 [metadata]
 name = eessi-testsuite
-version = 0.3.2
 description = Test suite for the EESSI software stack
 long_description = file: README.md
 long_description_content_type = text/markdown
@@ -21,6 +20,10 @@ namespace_packages = eessi
 [options.packages.find]
 include = eessi*
 
+[setuptools_scm]
+version_scheme = guess-next-dev
+local_scheme = node-and-date
+
 [flake8]
 max-line-length = 120
 # ignore star imports (F403, F405)

setup.py

@@ -1,2 +1,16 @@
 import setuptools
-setuptools.setup()
+import sys
+
+python_version = sys.version_info
+if python_version < (3, 8):
+    scm_require = ['packaging<=21.3', 'setuptools_scm<7']
+    scm_arg_key = "write_to"
+else:
+    scm_require = ['setuptools_scm>=8']
+    scm_arg_key = "version_file"
+
+
+setuptools.setup(
+    use_scm_version={scm_arg_key: 'eessi/testsuite/_version.py'},
+    setup_requires=scm_require,
+)