Determine the minimum required versions of dependencies from package …

…metadata for docs (#3380)

doc/conf.py

@@ -3,18 +3,25 @@
 """
 
 import datetime
-from importlib.metadata import metadata
+import importlib
 
-# ruff: isort: off
-from sphinx_gallery.sorting import ExplicitOrder, ExampleTitleSortKey
-from pygmt.clib import required_gmt_version
+from packaging.requirements import Requirement
 from pygmt import __commit__, __version__
+from pygmt.clib import required_gmt_version
 from pygmt.sphinx_gallery import PyGMTScraper
+from sphinx_gallery.sorting import ExampleTitleSortKey, ExplicitOrder
 
-# ruff: isort: on
-
-requires_python = metadata("pygmt")["Requires-Python"]
-requires_gmt = f">={required_gmt_version}"
+# Dictionary for dependency name and minimum required version.
+requirements = {
+    Requirement(requirement).name: str(Requirement(requirement).specifier)
+    for requirement in importlib.metadata.requires("pygmt")
+}
+requirements.update(
+    {
+        "python": importlib.metadata.metadata("pygmt")["Requires-Python"],
+        "gmt": f">={required_gmt_version}",
+    }
+)
 
 extensions = [
     "myst_parser",
@@ -51,8 +58,7 @@
 ]
 # These enable substitutions using {{ key }} in the Markdown files
 myst_substitutions = {
-    "requires_python": requires_python,
-    "requires_gmt": requires_gmt,
+    "requires": requirements,
 }
 
 

doc/install.md

@@ -59,7 +59,7 @@ development version.
 
 ## Which Python?
 
-PyGMT is tested to run on Python {{ requires_python }}.
+PyGMT is tested to run on Python {{ requires.python }}.
 
 We recommend using the [Miniforge](https://github.com/conda-forge/miniforge#miniforge3)
 Python distribution to ensure you have all dependencies installed and
@@ -69,7 +69,7 @@ your computer and doesn't interfere with any other Python installations on your
 
 ## Which GMT?
 
-PyGMT requires Generic Mapping Tools (GMT) {{ requires_gmt }} since there are many
+PyGMT requires Generic Mapping Tools (GMT) {{ requires.gmt }} since there are many
 changes being made to GMT itself in response to the development of PyGMT.
 
 Compiled conda packages of GMT for Linux, macOS and Windows are provided through

doc/minversions.md

@@ -12,7 +12,7 @@ after their initial release.
 
 | PyGMT Version | GMT | Python | NumPy | Pandas | Xarray |
 |---|---|---|---|---|---|
-| [Dev][]* [[Docs][Docs Dev]] | >=6.3.0 | >=3.10 | >=1.24 | >=1.5 | >=2022.09 |
+| [Dev][]* [[Docs][Docs Dev]] | {{ requires.gmt }} | {{ requires.python }} | {{ requires.numpy }} | {{ requires.pandas }} | {{ requires.xarray }} |
 | [v0.12.0][] [[Docs][Docs v0.12.0]] | >=6.3.0 | >=3.10 | >=1.23 | >=1.5 | >=2022.06 |
 | [v0.11.0][] [[Docs][Docs v0.11.0]] | >=6.3.0 | >=3.9 | >=1.23 |  |  |
 | [v0.10.0][] [[Docs][Docs v0.10.0]] | >=6.3.0 | >=3.9 | >=1.22 |  |  |