[build]: Build on Arch Linux with python 2.7-3.8

This change allow builds to succeed on Arch Linux with python 2.7, 3.7.4
and 3.8. Otherwise it fails with python 3.7.4 and 3.8.

- bin_to_assembly.py

  Using ord(byte) here is an error on python 3.x use a conditional
  expression instead.

- create_archive.py

  Using ord(byte) here is an error on python 3.x use a conditional
  expression instead.

  Use `as inst` syntax which is required by 3.x

- create_string_literal.py
- gen_library_src_paths.py

  Use `as inst` syntax which is required by 3.x

- make_version.py

  print >> sys.stderr syntax is not supported by 3.x use file=sys.stderr
  and add `from __future__ import print_function`

  vmhash.update requires a string use encode('utf-8')

  versopm+cc+text.replace requires a str so use `decode`.

Test: No added tests as there are no behavioral changes.
Change-Id: Id9b0a3187d06ad2b2dce3cf2244144393caddc9a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/124211
Commit-Queue: Alexander Thomas <athom@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>

Author: winksaville

runtime/tools/bin_to_assembly.py

@@ -83,11 +83,11 @@ def Main():
         with open(options.input, "rb") as input_file:
             if options.target_os in ["win"]:
                 for byte in input_file.read():
-                    output_file.write("byte %d\n" % ord(byte))
+                    output_file.write("byte %d\n" % (byte if isinstance(byte, int) else ord(byte)))
                     size += 1
             else:
                 for byte in input_file.read():
-                    output_file.write(".byte %d\n" % ord(byte))
+                    output_file.write(".byte %d\n" % (byte if isinstance(byte, int) else ord(byte)))
                     size += 1
 
         if options.target_os not in ["mac", "ios", "win"]:

runtime/tools/create_archive.py

@@ -98,7 +98,7 @@ def WriteCCFile(
         line = '   '
         lineCounter = 0
         for byte in tar_archive:
-            line += r" %d," % ord(byte)
+            line += r" %d," % (byte if isinstance(byte, int) else ord(byte))
             lineCounter += 1
             if lineCounter == 10:
                 out.write(line + '\n')
@@ -180,7 +180,7 @@ def Main(args):
         else:
             return MakeCCFile(options)
 
-    except Exception, inst:
+    except Exception as inst:
         sys.stderr.write('create_archive.py exception\n')
         sys.stderr.write(str(inst))
         sys.stderr.write('\n')

runtime/tools/create_string_literal.py

@@ -85,7 +85,7 @@ def main(args):
             return -1
 
         return 0
-    except Exception, inst:
+    except Exception as inst:
         sys.stderr.write('create_string_literal.py exception\n')
         sys.stderr.write(str(inst))
         sys.stderr.write('\n')

runtime/tools/gen_library_src_paths.py

@@ -126,7 +126,7 @@ def main(args):
             return -1
 
         return 0
-    except Exception, inst:
+    except Exception as inst:
         sys.stderr.write('gen_library_src_paths.py exception\n')
         sys.stderr.write(str(inst))
         sys.stderr.write('\n')

tools/make_version.py

@@ -5,6 +5,8 @@
 #
 # This python script creates a version string in a C++ file.
 
+from __future__ import print_function
+
 import hashlib
 import os
 import sys
@@ -14,7 +16,7 @@
 
 
 def debugLog(message):
-    print >> sys.stderr, message
+    print(message, file=sys.stderr)
     sys.stderr.flush()
 
 
@@ -77,7 +79,7 @@ def MakeSnapshotHashString():
     for vmfilename in VM_SNAPSHOT_FILES:
         vmfilepath = os.path.join(utils.DART_DIR, 'runtime', 'vm', vmfilename)
         with open(vmfilepath) as vmfile:
-            vmhash.update(vmfile.read())
+            vmhash.update(vmfile.read().encode('utf-8'))
     return vmhash.hexdigest()
 
 
@@ -97,7 +99,7 @@ def MakeFile(quiet,
     version_time = utils.GetGitTimestamp()
     if no_git_hash or version_time == None:
         version_time = "Unknown timestamp"
-    version_cc_text = version_cc_text.replace("{{COMMIT_TIME}}", version_time)
+    version_cc_text = version_cc_text.replace("{{COMMIT_TIME}}", version_time.decode("utf-8"))
     abi_version = utils.GetAbiVersion(version_file)
     version_cc_text = version_cc_text.replace("{{ABI_VERSION}}", abi_version)
     oldest_supported_abi_version = utils.GetOldestSupportedAbiVersion(