Backport PR matplotlib#28036: BLD: Fetch version from setuptools_scm at build time

Author: QuLogic

.circleci/config.yml

@@ -103,7 +103,7 @@ commands:
       - run:
           name: Install Python dependencies
           command: |
-            python -m pip install --user meson-python pybind11
+            python -m pip install --user meson-python numpy pybind11 setuptools-scm
             python -m pip install --user \
                 numpy<< parameters.numpy_version >> \
                 -r requirements/doc/doc-requirements.txt

azure-pipelines.yml

@@ -135,7 +135,7 @@ stages:
 
           - bash: |
               python -m pip install --upgrade pip
-              python -m pip install --upgrade meson-python pybind11
+              python -m pip install --upgrade meson-python numpy pybind11 setuptools-scm
               python -m pip install -r requirements/testing/all.txt -r requirements/testing/extra.txt
             displayName: 'Install dependencies with pip'
 

meson.build

@@ -1,7 +1,7 @@
 project(
   'matplotlib',
   'c', 'cpp',
-  version: '3.9.0.dev0',
+  version: run_command(find_program('python3'), '-m', 'setuptools_scm', check: true).stdout().strip(),
   # qt_editor backend is MIT
   # ResizeObserver at end of lib/matplotlib/backends/web_backend/js/mpl.js is CC0
   # Carlogo, STIX and Computer Modern is OFL