MAINT: Add update_requirements.py; update requirements

Author: effigies

.travis.yml

@@ -29,11 +29,11 @@ matrix:
     # Absolute minimum dependencies
     - python: 3.5
       env:
-        - DEPENDS="numpy==1.10.1 setuptools==30.3.0"
+        - DEPENDS="-r min-requirements.txt setuptools==30.3.0"
     # Absolute minimum dependencies
     - python: 3.5
       env:
-        - DEPENDS="numpy==1.10.1"
+        - DEPENDS="-r min-requirements.txt"
         - CHECK_TYPE="import"
     # Absolute minimum dependencies plus oldest MPL
     # Check these against:
@@ -42,11 +42,11 @@ matrix:
     # requirements.txt
     - python: 3.5
       env:
-        - DEPENDS="numpy==1.10.1 matplotlib==1.3.1"
+        - DEPENDS="-r min-requirements.txt matplotlib==1.3.1"
     # Minimum pydicom dependency
     - python: 3.5
       env:
-        - DEPENDS="numpy==1.10.1 pydicom==0.9.9 pillow==2.6"
+        - DEPENDS="-r min-requirements.txt pydicom==0.9.9 pillow==2.6"
     # pydicom master branch
     - python: 3.5
       env:

doc/source/installation.rst

@@ -81,13 +81,10 @@ is for you.
 Requirements
 ------------
 
-.. check these against:
-    nibabel/info.py
-    requirements.txt
-    .travis.yml
+.. check these against setup.cfg
 
-*  Python_ 2.7, or >= 3.4
-*  NumPy_ 1.8 or greater
+*  Python_ 3.5 or greater
+*  NumPy_ 1.10.1 or greater
 *  Six_ 1.3 or greater
 *  SciPy_ (optional, for full SPM-ANALYZE support)
 *  PyDICOM_ 0.9.9 or greater (optional, for DICOM support)

min-requirements.txt

@@ -0,0 +1,3 @@
+# Auto-generated by tools/update_requirements.py
+numpy ==1.10.1
+six ==1.3

requirements.txt

@@ -1,9 +1,3 @@
-# Minumum requirements
-#
-# Check these against
-#   nibabel/info.py
-#   .travis.yml
-#   doc/source/installation.rst
-
-six>=1.3
-numpy>=1.10.1
+# Auto-generated by tools/update_requirements.py
+numpy >=1.10.1
+six >=1.3

tools/update_requirements.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+import sys
+from configparser import ConfigParser
+from pathlib import Path
+
+if sys.version_info < (3, 6):
+    print("This script requires Python 3.6 to work correctly")
+    sys.exit(1)
+
+repo_root = Path(__file__).parent.parent
+setup_cfg = repo_root / "setup.cfg"
+reqs = repo_root / "requirements.txt"
+min_reqs = repo_root / "min-requirements.txt"
+
+config = ConfigParser()
+config.read(setup_cfg)
+requirements = config.get("options", "install_requires").strip().splitlines()
+
+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))
+
+# Write minimum requirements
+lines[1:-1] = [req.replace(">=", "==").replace("~=", "==") for req in requirements]
+min_reqs.write_text("\n".join(lines))