try to improve parser

src/ahriman/models/pkgbuild.py

@@ -39,11 +39,11 @@ class PkgbuildToken(StrEnum):
     well-known tokens dictionary
 
     Attributes:
-        ArrayStarts(PkgbuildToken): (class attribute) array starts token
         ArrayEnds(PkgbuildToken): (class attribute) array ends token
+        ArrayStarts(PkgbuildToken): (class attribute) array starts token
         FunctionDeclaration(PkgbuildToken): (class attribute) function declaration token
-        FunctionStarts(PkgbuildToken): (class attribute) function starts token
         FunctionEnds(PkgbuildToken): (class attribute) function ends token
+        FunctionStarts(PkgbuildToken): (class attribute) function starts token
     """
 
     ArrayStarts = "("
@@ -113,6 +113,10 @@ class Pkgbuild(Mapping[str, str | list[str]]):
         fields = {}
 
         parser = shlex.shlex(stream, posix=True, punctuation_chars=True)
+        # ignore substitution and extend bash symbols
+        parser.wordchars += "${}#:+"
+        # in case of default behaviour, it will ignore, for example, segment part of url outside of quotes
+        parser.commenters = ""
         while token := parser.get_token():
             try:
                 key, value = cls._parse_token(token, parser)