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/conftest.py

@@ -1,5 +1,6 @@
 import pytest
 
+from pathlib import Path
 from unittest.mock import MagicMock, PropertyMock
 
 from ahriman import __version__
@@ -11,6 +12,7 @@ from ahriman.models.internal_status import InternalStatus
 from ahriman.models.package import Package
 from ahriman.models.package_description import PackageDescription
 from ahriman.models.package_source import PackageSource
+from ahriman.models.pkgbuild import Pkgbuild
 from ahriman.models.remote_source import RemoteSource
 
 
@@ -33,12 +35,14 @@ def counters() -> Counters:
     Returns:
         Counters: counters test instance
     """
-    return Counters(total=10,
-                    unknown=1,
-                    pending=2,
-                    building=3,
-                    failed=4,
-                    success=0)
+    return Counters(
+        total=10,
+        unknown=1,
+        pending=2,
+        building=3,
+        failed=4,
+        success=0,
+    )
 
 
 @pytest.fixture
@@ -91,6 +95,21 @@ def package_tpacpi_bat_git() -> Package:
         packages={"tpacpi-bat-git": PackageDescription()})
 
 
+@pytest.fixture
+def pkgbuild_ahriman(resource_path_root: Path) -> Pkgbuild:
+    """
+    pkgbuild fixture
+
+    Args:
+        resource_path_root(Path): resource path root directory
+
+    Returns:
+        Pkgbuild: pkgbuild test instance
+    """
+    pkgbuild = resource_path_root / "models" / "package_ahriman_pkgbuild"
+    return Pkgbuild.from_file(pkgbuild)
+
+
 @pytest.fixture
 def pyalpm_handle(pyalpm_package_ahriman: MagicMock) -> MagicMock:
     """