CP-50091: Moved inventory.py from scripts/examples/python/ to python3…

…/packages/inventory.py

- Fixed bare-except, unspecified-encoding  and indentation issue

Signed-off-by: Ashwinh <ashwin.h@cloud.com>

python3/Makefile

@@ -13,6 +13,7 @@ install:
 	$(IPROG) -d $(DESTDIR)$(PLUGINDIR)
 
 
+	$(IDATA) packages/inventory.py $(DESTDIR)$(SITE3_DIR)/
 	$(IDATA) packages/observer.py $(DESTDIR)$(SITE3_DIR)/
 
 	$(IPROG) libexec/host-display $(DESTDIR)$(LIBEXECDIR)

python3/packages/inventory.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+"""
+inventory.py
+
+This module defines functions to read and parse constants from the xensource-inventory file.
+"""
+import sys
+
+INVENTORY = "@INVENTORY@"
+INSTALLATION_UUID = "INSTALLATION_UUID"
+
+
+def read_kvpairs(filename):
+    """Read in a file of key-value pairs in the format used by the inventory file"""
+    all_entries = {}
+    with open(filename, 'r', encoding='utf-8') as f:
+        for line in f:
+            equals = line.index("=")
+            key = line[:equals]
+            value = line[equals+1:].strip().strip("'")
+            all_entries[key] = value
+    return all_entries
+
+
+def parse():
+    """Return the contents of the xensource inventory file as a dictionary"""
+    try:
+        return read_kvpairs(INVENTORY)
+    except FileNotFoundError as e:
+        print("Error: File '{}' not found. {}".format(INVENTORY, e), file=sys.stderr)
+        return {}
+
+
+def get_localhost_uuid():
+    """Return the UUID of the local host"""
+    return parse()[INSTALLATION_UUID]

scripts/Makefile

@@ -155,12 +155,10 @@ install:
 ifneq ($(BUILD_PY2), NO)
 	$(IDATA) examples/python/XenAPIPlugin.py $(DESTDIR)$(SITE_DIR)/
 	$(IDATA) examples/python/XenAPI/XenAPI.py $(DESTDIR)$(SITE_DIR)/
-	$(IDATA) examples/python/inventory.py $(DESTDIR)$(SITE_DIR)/
 endif
 	$(IDATA) examples/python/XenAPIPlugin.py $(DESTDIR)$(SITE3_DIR)/
 	sed -i 's/#!\/usr\/bin\/python/#!\/usr\/bin\/python3/' $(DESTDIR)$(SITE3_DIR)/XenAPIPlugin.py
 	$(IDATA) examples/python/XenAPI/XenAPI.py $(DESTDIR)$(SITE3_DIR)/
-	$(IDATA) examples/python/inventory.py $(DESTDIR)$(SITE3_DIR)/
 	$(IPROG) examples/python/shell.py $(DESTDIR)$(LIBEXECDIR)/shell.py
 # YUM plugins
 	$(IPROG) yum-plugins/accesstoken.py $(DESTDIR)$(YUMPLUGINDIR)