[PCS Client Tool] Migrate from deprecated pkg_resources to packaging (#485)

* [PCS Client Tool] Migrate from deprecated pkg_resources to packaging

Version 14.0 is the first version that had the Version class.

Ref: https://setuptools.pypa.io/en/latest/pkg_resources.html

* [PCS Client Tool] Avoid needless indirection when contracting Version objects

---------

Signed-off-by: Miro Hrončok <miro@hroncok.cz>

Author: hroncok

tools/PcsClientTool/lib/intelsgx/pcs.py

@@ -10,7 +10,7 @@
 from lib.intelsgx.credential import Credentials
 from requests.adapters import HTTPAdapter
 from urllib3.util import Retry
-from pkg_resources import parse_version
+from packaging.version import Version
 
 certBegin= '-----BEGIN CERTIFICATE-----'
 certEnd= '-----END CERTIFICATE-----'
@@ -58,7 +58,7 @@ def _get_request(self, url, needKey):
 
         PARAMS = {}
         https = requests.Session()
-        if parse_version(urllib3.__version__) < parse_version('1.26.0'):
+        if Version(urllib3.__version__) < Version('1.26.0'):
             https.mount("https://", HTTPAdapter(max_retries=Retry(method_whitelist=["HEAD", "GET", "PUT", "POST", "DELETE", "OPTIONS", "TRACE"])))
         else:
             https.mount("https://", HTTPAdapter(max_retries=Retry(allowed_methods=["HEAD", "GET", "PUT", "POST", "DELETE", "OPTIONS", "TRACE"])))
@@ -76,7 +76,7 @@ def _post_request(self, url, data, needKey):
 
         PARAMS = {}
         https = requests.Session()
-        if parse_version(urllib3.__version__) < parse_version('1.26.0'):
+        if Version(urllib3.__version__) < Version('1.26.0'):
             https.mount("https://", HTTPAdapter(max_retries=Retry(method_whitelist=["HEAD", "GET", "PUT", "POST", "DELETE", "OPTIONS", "TRACE"])))
         else:
             https.mount("https://", HTTPAdapter(max_retries=Retry(allowed_methods=["HEAD", "GET", "PUT", "POST", "DELETE", "OPTIONS", "TRACE"])))

tools/PcsClientTool/requirements.txt

@@ -1,8 +1,8 @@
 asn1>=2.4.1
 cryptography>=41.0.7,<44
 keyring>=23.0.0
+packaging>=14.0
 pyOpenSSL>=23.2.0,<24.3.0
 pypac>=0.14.0
 Requests>=2.31.0
-setuptools>=65.5.1,<81
 urllib3>=1.26.18