MNT: Add tool to keep requirements in sync

Author: effigies

requirements.txt

@@ -1,11 +1,11 @@
+# Auto-generated by tools/update_requirements.py
 click>=6.6.0
 networkx>=1.9
 nibabel>=2.1.0
-numpy>=1.9.0 ; python_version < "3.7"
+numpy>=1.12 ; python_version < "3.7"
 numpy>=1.15.3 ; python_version >= "3.7"
 packaging
 prov>=1.5.2
-neurdflib
 pydot>=1.2.3
 pydotplus
 python-dateutil>=2.2
@@ -14,3 +14,4 @@ simplejson>=3.8.0
 traits>=4.6,!=5.0
 filelock>=3.0.0
 etelemetry
+neurdflib

tools/update_requirements.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+from runpy import run_path
+from pathlib import Path
+
+repo_root = Path(__file__).parent.parent
+info_file = repo_root / "nipype" / "info.py"
+reqs = repo_root / "requirements.txt"
+
+info = run_path(info_file)
+requirements = info["REQUIRES"]
+
+script_name = Path(__file__).relative_to(repo_root)
+
+lines = [f"# Auto-generated by {script_name}", ""]
+
+# Write requirements
+lines[1:-1] = requirements
+reqs.write_text("\n".join(lines))