feat: drop explicit makepkg usage (#134)

* generate filenames without using makepkg

* pkgbuild parser impl

* completely remove makepkg calls

* simplify typed get

* try to improve parser

* docs and recipes updatte

* never raise keyerror instead return empty string

* udpate tests

* add support of array expansion

* docs update

* tests update

* handle quoted control sequences correctly

* expand bash

* allow packages without package function

* docs update

* add moroe tests

* small improovements

* support escaped arrays and functions

tests/ahriman/models/test_pkgbuild_patch.py

@@ -132,6 +132,14 @@ def test_serialize_list() -> None:
     assert PkgbuildPatch("key", ["val'ue", "val\"ue2"]).serialize() == """key=('val'"'"'ue' 'val"ue2')"""
 
 
+def test_substitute() -> None:
+    """
+    must correctly substitute variables
+    """
+    assert PkgbuildPatch("key", "$env $value").substitute({"env": "variable"}) == "variable $value"
+    assert PkgbuildPatch("key", ["$env $value"]).substitute({"env": "variable"}) == ["variable $value"]
+
+
 def test_write(mocker: MockerFixture) -> None:
     """
     must write serialized value to the file