Phase 30: complete configurable installation and release qualification

tools/install.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+"""Install the explicit owned inventory; replace files without following symlinks."""
+import argparse
+import os
+from pathlib import Path
+import shutil
+import tempfile
+from install_layout import arguments, inventory, layout, staged
+
+parser = argparse.ArgumentParser(description=__doc__)
+arguments(parser)
+parser.add_argument('--build-dir', type=Path, required=True)
+parser.add_argument('--gui', action='store_true')
+args = parser.parse_args()
+source = Path(__file__).resolve().parent.parent
+entries = []
+for destination, original in inventory(source, layout(args)):
+    name = destination.name
+    if name == 'BINARY_MANIFEST.json' or (not args.gui and name in ('xtc', 'xtc.desktop')):
+        continue
+    if original is None:
+        original = args.build_dir / name
+    destination = staged(destination, args.destdir)
+    if not original.is_file():
+        raise ValueError(f'Missing install input: {original}')
+    if destination.exists() and not (destination.is_file() or destination.is_symlink()):
+        raise ValueError(f'Refusing non-file destination: {destination}')
+    entries.append((destination, original))
+for destination, original in entries:
+    destination.parent.mkdir(parents=True, exist_ok=True)
+    fd, pending = tempfile.mkstemp(prefix='.xtc-install-', dir=destination.parent)
+    try:
+        with os.fdopen(fd, 'wb') as output, original.open('rb') as input_file:
+            shutil.copyfileobj(input_file, output)
+            os.fchmod(output.fileno(), 0o755 if destination.name in ('xtc', 'xtc-check') else 0o644)
+        os.replace(pending, destination)
+    finally:
+        Path(pending).unlink(missing_ok=True)