doc: add docstring and do some refactor

packer/src/sarasacw_omrf_packer/renders/pkgconfig.py

@@ -9,25 +9,11 @@ rendering on top of :class:`renders.common.BaseRender`.
 
 from dataclasses import dataclass
 from typing import Any
-from re import Pattern, compile
 from . import common
 from .. import utils
 from semver import Version
 
 
-_EOL_PATTERN: Pattern = compile(r"[\r\n]")
-
-
-def _is_good_sentence(s: str) -> bool:
-    """Check whether given string has EOL chars.
-
-    This function is used for checking human-readable name and description,
-    because EOL chars are not allowed in these properties.
-    :returns: True if given string don't contain any EOL chars, otherwise false.
-    """
-    return _EOL_PATTERN.search(s) is None
-
-
 @dataclass(frozen=True)
 class PkgConfigProperties:
     """Inputs required to render the pkg-config ``.pc`` file.
@@ -64,9 +50,9 @@ class PkgConfigProperties:
             version carries a prerelease or build component (unsupported in
             pkg-config).
         """
-        if self.name == "" or not _is_good_sentence(self.name):
+        if self.name == "" or not utils.is_good_sentence(self.name):
             raise ValueError("bad name (blank or has EOL chars) of pkg-config")
-        if self.description == "" or not _is_good_sentence(self.description):
+        if self.description == "" or not utils.is_good_sentence(self.description):
             raise ValueError("bad description (blank or has EOL chars) of pkg-config")
         if not utils.is_good_name(self.artifact):
             raise ValueError("bad artifact name in pkg-config")