Remove pkg_resources to fix failing tests in CI

requirements.txt

@@ -1,4 +1,3 @@
-setuptools
 tzlocal
 utcdatetime
 zipfile2

sciunit2/cli.py

@@ -22,7 +22,7 @@
 from getopt import getopt, GetoptError
 from io import StringIO
 import textwrap
-import pkg_resources
+from importlib.metadata import version as pkg_version
 import os
 import platform
 
@@ -92,7 +92,7 @@ def _main(args):
             subcommand_usage(sys.stdout, [cls() for cls in __cmds__])
             return
         elif op == '--version':
-            print(pkg_resources.require("sciunit2")[0])
+            print(pkg_version("sciunit2"))
             return
         elif op == '--root':  # pragma: no cover
             import sciunit2.workspace

sciunit2/command/exec_/__init__.py

@@ -7,7 +7,7 @@
 import sciunit2.workspace
 
 from getopt import getopt
-from pkg_resources import resource_filename
+from importlib.resources import files
 
 
 class ExecCommand(CommitMixin, AbstractCommand):
@@ -28,7 +28,7 @@ def run(self, args):
         with emgr.exclusive():
             rev = emgr.add(args)
             if optlist:
-                standin_fn = resource_filename(__name__, 'sciunit')
+                standin_fn = str(files(__name__).joinpath('sciunit'))
                 sciunit2.core.shell(env=path_injection_for(standin_fn))
             else:
                 sciunit2.core.capture(args)

sciunit2/command/post_install/__init__.py

@@ -5,7 +5,7 @@
 import os
 import pwd
 import tempfile
-import pkg_resources
+from importlib.resources import files
 from shutil import copyfileobj
 from contextlib import closing
 from humanfriendly import format_path
@@ -43,7 +43,8 @@ def patch_shell_script(from_, to, rcfile):
         to_ = os.path.expanduser(to)
         with tempfile.NamedTemporaryFile(dir=os.path.dirname(to_),
                                          prefix='pip-tmp') as tmp:
-            script = pkg_resources.resource_stream(__name__, from_)
+            script_path = files(__name__).joinpath(from_)
+            script = script_path.open("rb")
             try:
                 with closing(script) as g, closing(open(to_, 'a+')) as f:
                     f.seek(0)
@@ -68,4 +69,4 @@ def patch_shell_script(from_, to, rcfile):
                 print('Unable to patch %s.  Please copy\n\n    %s\n\n'
                       'to a subdirectory of your home directory '
                       'and "source" it in %s.' %
-                      (to, format_path(script.name), rcfile))
+                      (to, format_path(str(script_path)), rcfile))