Enable creating a binary with PyOxidizer

With PyOxidizer 0.18.0 AppName in setup.py has to be changed to the
all lower case "linkchecker".

Application translations do not work.

better_exchook2.fallback_findfile() may still need converting, first
needs a test.

MANIFEST.in

@@ -7,6 +7,7 @@ include Dockerfile
 include MANIFEST.in
 include Makefile
 include install-rpm.sh
+include pyoxidizer.bzl
 include .project
 include .pydevproject
 include .yamllint

linkcheck/command/arg_parser.py

@@ -19,7 +19,7 @@ Create command line arguments.
 
 import argparse
 
-from .. import checker, logconf, logger
+from .. import checker, logconf, logger, COMMAND_NAME
 
 from ..cmdline import LCArgumentParser
 
@@ -205,7 +205,9 @@ class ArgParser(LCArgumentParser):
 
     def __init__(self):
         super().__init__(
-            epilog=Epilog, formatter_class=argparse.RawDescriptionHelpFormatter
+            epilog=Epilog,
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+            prog=COMMAND_NAME,
         )
 
         # ================== general options =====================

pyoxidizer.bzl

@@ -0,0 +1,13 @@
+def make_exe():
+    dist = default_python_distribution()
+    python_config = dist.make_python_interpreter_config()
+    python_config.run_module = "linkcheck"
+    exe = dist.to_python_executable(
+        name="linkchecker",
+        config=python_config,
+    )
+    exe.add_python_resources(exe.pip_install([CWD]))
+    return exe
+
+register_target("exe", make_exe)
+resolve_targets()

setup.py

@@ -47,6 +47,10 @@ else:
 
 # the application name
 AppName = "LinkChecker"
+if "PYOXIDIZER" in os.environ:
+    # Name with capitals not supported by PyOxidizer 0.18.0
+    # https://github.com/indygreg/PyOxidizer/issues/488
+    AppName = AppName.lower()
 Description = "check links in web documents or full websites"
 
 RELEASE_DATE_FILE = "_release_date"