Fix RECORD file in merged Python wheel (#606)

fixes #535

azure-pipelines.yml

@@ -218,14 +218,10 @@ jobs:
       downloadPath: windows
 
   - bash: |
-      unzip -o linux/*.whl -d merged
-      unzip -o macosx/*.whl -d merged
-      unzip -o windows/*.whl -d merged
-      cd merged
-      zip -r FMPy-x.x.x-py3-none-any.whl .
+      python3 merge_wheels.py
     displayName: Merge Python Wheels
 
   - task: PublishBuildArtifacts@1
     inputs:
-      pathtoPublish: merged/FMPy-x.x.x-py3-none-any.whl
+      pathtoPublish: merged
       artifactName: merged

merge_wheels.py

@@ -0,0 +1,48 @@
+import os
+import shutil
+import zipfile
+from pathlib import Path
+from shutil import make_archive, unpack_archive
+
+root = Path(__file__).parent
+merge = root / 'merge'
+merged = root / 'merged'
+
+
+if merge.exists():
+    shutil.rmtree(merge)
+
+os.makedirs(merge)
+
+if merged.exists():
+    shutil.rmtree(merged)
+
+os.makedirs(merged)
+
+wheels = []
+
+for dirpath, dirnames, filenames in os.walk(root):
+    for filename in filenames:
+        if filename.endswith('.whl'):
+            wheels.append(root / dirpath / filename)
+
+records = set()
+
+for wheel in wheels:
+    with zipfile.ZipFile(wheel, 'r') as archive:
+        for info in archive.filelist:
+            if info.filename.endswith('RECORD'):
+                record = info.filename
+                break
+        records.update(archive.read(record).split(b'\n'))
+        archive.extractall(merge)
+
+    unpack_archive(wheel, merge, 'zip')
+
+with open(merge / record, 'w') as record:
+    lines = [line.decode('utf-8') for line in records]
+    lines.sort()
+    record.writelines('\n'.join(lines))
+
+make_archive(merged / wheels[0].stem, 'zip', merge)
+os.rename(merged / (wheels[0].stem + '.zip'), merged / wheels[0].name)