SL-15742: Convert build scripts to Python 3

This changeset makes it possible to build the Second Life viewer using
Python 3. It is designed to be used with an equivalent Autobuild branch
so that a developer can compile without needing Python 2 on their
machine.

Breaking change: Python 2 support ending

Rather than supporting two versions of Python, including one that was
discontinued at the beginning of the year, this branch focuses on
pouring future effort into Python 3 only. As a result, scripts do not
need to be backwards compatible. This means that build environments,
be they on personal computers and on build agents, need to have a
compatible interpreter.

Notes

- SLVersionChecker will still use Python 2 on macOS
- Fixed the message template url used by template_verifier.py

2 files changed, 32 insertions, 32 deletions

diff --git a/scripts/metrics/viewer_asset_logs.py b/scripts/metrics/viewer_asset_logs.py
index e48286f696..0365936188 100644
--- a/scripts/metrics/viewer_asset_logs.py
+++ b/scripts/metrics/viewer_asset_logs.py
@@ -40,7 +40,7 @@ def get_metrics_record(infiles):
         context = iter(context)
 
         # get the root element
-        event, root = context.next()
+        event, root = next(context)
         try:
             for event, elem in context:
                 if event == "end" and elem.tag == "llsd":
@@ -48,7 +48,7 @@ def get_metrics_record(infiles):
                     sd = llsd.parse_xml(xmlstr)
                     yield sd
         except etree.XMLSyntaxError:
-            print "Fell off end of document"
+            print("Fell off end of document")
 
         f.close()
 
@@ -56,7 +56,7 @@ def update_stats(stats,rec):
     for region in rec["regions"]:
         region_key = (region["grid_x"],region["grid_y"])
         #print "region",region_key
-        for field, val in region.iteritems():
+        for field, val in region.items():
             if field in ["duration","grid_x","grid_y"]:
                 continue
             if field == "fps":
@@ -96,7 +96,7 @@ if __name__ == "__main__":
     for key in sorted(stats.keys()):
         val = stats[key]
         if val["count"] > 0:
-            print key,"count",val["count"],"mean_time",val["sum"]/val["count"],"mean_bytes",val["sum_bytes"]/val["count"],"net bytes/sec",val["sum_bytes"]/val["sum"],"enqueued",val["enqueued"],"dequeued",val["dequeued"]
+            print(key,"count",val["count"],"mean_time",val["sum"]/val["count"],"mean_bytes",val["sum_bytes"]/val["count"],"net bytes/sec",val["sum_bytes"]/val["sum"],"enqueued",val["enqueued"],"dequeued",val["dequeued"])
         else:
-            print key,"count",val["count"],"enqueued",val["enqueued"],"dequeued",val["dequeued"]
+            print(key,"count",val["count"],"enqueued",val["enqueued"],"dequeued",val["dequeued"])
 
diff --git a/scripts/metrics/viewerstats.py b/scripts/metrics/viewerstats.py
index f7be3d967e..7e19539e15 100755
--- a/scripts/metrics/viewerstats.py
+++ b/scripts/metrics/viewerstats.py
@@ -54,11 +54,11 @@ def show_stats_by_key(recs,indices,settings_sd = None):
                     v = tuple(v)
                 per_key_cnt[k][v] += 1
         except Exception as e:
-            print "err", e
-            print "d", d, "k", k, "v", v
+            print("err", e)
+            print("d", d, "k", k, "v", v)
             raise
     mc = cnt.most_common()
-    print "========================="
+    print("=========================")
     keyprefix = ""
     if len(indices)>0:
         keyprefix = ".".join(indices) + "."
@@ -67,32 +67,32 @@ def show_stats_by_key(recs,indices,settings_sd = None):
         bigc = m[1]
         unset_cnt = len(recs) - bigc
         kmc = per_key_cnt[k].most_common(5)
-        print i, keyprefix+str(k), bigc
+        print(i, keyprefix+str(k), bigc)
         if settings_sd is not None and k in settings_sd and "Value" in settings_sd[k]:
-            print "    ", "default",settings_sd[k]["Value"],"count",unset_cnt
+            print("    ", "default",settings_sd[k]["Value"],"count",unset_cnt)
         for v in kmc:
-            print "    ", "value",v[0],"count",v[1]
+            print("    ", "value",v[0],"count",v[1])
     if settings_sd is not None:
-        print "Total keys in settings", len(settings_sd.keys())
+        print("Total keys in settings", len(settings_sd.keys()))
         unused_keys = list(set(settings_sd.keys()) - set(cnt.keys()))
         unused_keys_non_str = [k for k in unused_keys if settings_sd[k]["Type"] != "String"]
         unused_keys_str = [k for k in unused_keys if settings_sd[k]["Type"] == "String"]
 
         # Things that no one in the sample has set to a non-default value. Possible candidates for removal.
-        print "\nUnused_keys_non_str", len(unused_keys_non_str)
-        print   "======================"
-        print "\n".join(sorted(unused_keys_non_str))
+        print("\nUnused_keys_non_str", len(unused_keys_non_str))
+        print(  "======================")
+        print("\n".join(sorted(unused_keys_non_str)))
 
         # Strings are not currently logged, so we have no info on usage.
-        print "\nString keys (usage unknown)", len(unused_keys_str)
-        print   "======================"
-        print "\n".join(sorted(unused_keys_str))
+        print("\nString keys (usage unknown)", len(unused_keys_str))
+        print(  "======================")
+        print("\n".join(sorted(unused_keys_str)))
 
         # Things that someone has set but that aren't recognized settings.
         unrec_keys = list(set(cnt.keys()) - set(settings_sd.keys()))
-        print "\nUnrecognized keys", len(unrec_keys)
-        print   "======================"
-        print "\n".join(sorted(unrec_keys))
+        print("\nUnrecognized keys", len(unrec_keys))
+        print(  "======================")
+        print("\n".join(sorted(unrec_keys)))
 
         result = (settings_sd.keys(), unused_keys_str, unused_keys_non_str, unrec_keys)
     return result
@@ -138,7 +138,7 @@ def get_used_strings(root_dir):
     for dir_name, sub_dir_list, file_list in os.walk(root_dir):
         for fname in file_list:
             if fname in ["settings.xml", "settings.xml.edit", "settings_per_account.xml"]:
-                print "skip", fname
+                print("skip", fname)
                 continue
             (base,ext) = os.path.splitext(fname)
             #if ext not in [".cpp", ".hpp", ".h", ".xml"]:
@@ -155,8 +155,8 @@ def get_used_strings(root_dir):
                     for m in ms:
                         #print "used_str",m
                         used_str.add(m)
-    print "skipped extensions", skipped_ext
-    print "got used_str", len(used_str)
+    print("skipped extensions", skipped_ext)
+    print("got used_str", len(used_str))
     return used_str
                 
     
@@ -171,7 +171,7 @@ if __name__ == "__main__":
     args = parser.parse_args()
 
     for fname in args.infiles:
-        print "process", fname
+        print("process", fname)
         df = pd.read_csv(fname,sep='\t')
         #print "DF", df.describe()
         jstrs = df['RAW_LOG:BODY']
@@ -182,12 +182,12 @@ if __name__ == "__main__":
         show_stats_by_key(recs,[])
         show_stats_by_key(recs,["agent"])
         if args.preferences:
-            print "\nSETTINGS.XML"
+            print("\nSETTINGS.XML")
             settings_sd = parse_settings_xml("settings.xml")
             #for skey,svals in settings_sd.items(): 
             #    print skey, "=>", svals
             (all_str,_,_,_) = show_stats_by_key(recs,["preferences","settings"],settings_sd)
-            print
+            print()
 
             #print "\nSETTINGS_PER_ACCOUNT.XML"
             #settings_pa_sd = parse_settings_xml("settings_per_account.xml")
@@ -201,19 +201,19 @@ if __name__ == "__main__":
                 unref_strings = all_str_set-used_strings_set
                 # Some settings names are generated by appending to a prefix. Need to look for this case.
                 prefix_used = set()
-                print "checking unref_strings", len(unref_strings)
+                print("checking unref_strings", len(unref_strings))
                 for u in unref_strings:
                     for k in range(6,len(u)):
                         prefix = u[0:k]
                         if prefix in all_str_set and prefix in used_strings_set:
                             prefix_used.add(u)
                             #print "PREFIX_USED",u,prefix
-                print "PREFIX_USED", len(prefix_used), ",".join(list(prefix_used))
-                print
+                print("PREFIX_USED", len(prefix_used), ",".join(list(prefix_used)))
+                print()
                 unref_strings = unref_strings - prefix_used
                         
-                print "\nUNREF_IN_CODE " + str(len(unref_strings)) + "\n"
-                print "\n".join(list(unref_strings))
+                print("\nUNREF_IN_CODE " + str(len(unref_strings)) + "\n")
+                print("\n".join(list(unref_strings)))
                 settings_str = read_raw_settings_xml("settings.xml")
                 # Do this via direct string munging to generate minimal changeset
                 settings_edited = remove_settings(settings_str,unref_strings)