Permit versioning without git repo

Dockerfile

@@ -13,20 +13,20 @@ COPY --from=jl /usr/local/julia /usr/local/julia
 ENV PATH="/usr/local/julia/bin:${PATH}"
 
 # Install IPython and other useful libraries:
-RUN pip install ipython matplotlib
+RUN pip install --no-cache-dir ipython matplotlib
 
 WORKDIR /pysr
 
 # Caches install (https://stackoverflow.com/questions/25305788/how-to-avoid-reinstalling-packages-when-building-docker-image-for-python-project)
 ADD ./requirements.txt /pysr/requirements.txt
-RUN pip3 install -r /pysr/requirements.txt
+RUN pip3 install --no-cache-dir -r /pysr/requirements.txt
 
 # Install PySR:
 # We do a minimal copy so it doesn't need to rerun at every file change:
 ADD ./pyproject.toml /pysr/pyproject.toml
 ADD ./setup.py /pysr/setup.py
-ADD ./pysr/ /pysr/pysr/
-RUN pip3 install .
+ADD ./pysr /pysr/pysr
+RUN pip3 install --no-cache-dir -e .
 
 # Install Julia pre-requisites:
 RUN python3 -c 'import pysr'

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools", "setuptools_scm"]
+requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -27,8 +27,5 @@ package-data = {pysr = ["../datasets/*"]}
 [tool.setuptools.dynamic]
 dependencies = {file = "requirements.txt"}
 
-[tool.setuptools_scm]
-write_to = "pysr/version.py"
-
 [tool.isort]
 profile = "black"

setup.py

@@ -1,4 +1,32 @@
+import os
+
 from setuptools import setup
 
+if os.path.exists(".git"):
+    kwargs = {
+        "use_scm_version": {
+            "write_to": "pysr/version.py",
+        },
+        "setup_requires": ["setuptools", "setuptools_scm"],
+    }
+else:
+    # Read from pyproject.toml directly
+    import re
+
+    with open(os.path.join(os.path.dirname(__file__), "pyproject.toml")) as f:
+        data = f.read()
+        # Find the version
+        version = re.search(r'version = "(.*)"', data).group(1)
+
+    # Write the version to version.py
+    with open(os.path.join(os.path.dirname(__file__), "pysr", "version.py"), "w") as f:
+        f.write(f'__version__ = "{version}"')
+
+    kwargs = {
+        "use_scm_version": False,
+        "version": version,
+    }
+
+
 # Build options are managed in pyproject.toml
-setup()
+setup(**kwargs)