Add Replacement.to_service helper method

src/bci_build/package/__init__.py

@@ -29,6 +29,7 @@
 from bci_build.registry import ApplicationCollectionRegistry
 from bci_build.registry import Registry
 from bci_build.registry import publish_registry
+from bci_build.service import Service
 from bci_build.templates import DOCKERFILE_TEMPLATE
 from bci_build.templates import INFOHEADER_TEMPLATE
 from bci_build.templates import KIWI_TEMPLATE
@@ -106,6 +107,21 @@ def __post_init__(self) -> None:
         if self.file_name and "readme" in self.file_name.lower():
             raise ValueError(f"Cannot replace variables in {self.file_name}!")
 
+    def to_service(self, default_file_name: str) -> Service:
+        """Convert this replacement into a
+        :py:class:`~bci__build.service.Service`.
+
+        """
+        return Service(
+            name="replace_using_package_version",
+            param=[
+                ("file", self.file_name or default_file_name),
+                ("regex", self.regex_in_build_description),
+                ("package", self.package_name),
+            ]
+            + ([("parse-version", self.parse_version)] if self.parse_version else []),
+        )
+
 
 def _build_tag_prefix(os_version: OsVersion) -> str:
     if os_version == OsVersion.TUMBLEWEED:

tests/test_service.py

@@ -1,5 +1,6 @@
 from bci_build.container_attributes import BuildType
 from bci_build.containercrate import ContainerCrate
+import pytest
 from bci_build.os_version import OsVersion
 from bci_build.package import DevelopmentContainer
 from bci_build.package import ParseVersion
@@ -19,6 +20,49 @@ def test_service_with_params_as_xml():
     )
 
 
+@pytest.mark.parametrize(
+    "replacement, default_file_name, service",
+    [
+        # bare bone example
+        (
+            Replacement(regex := "%ver%", pkg := "pkgFoo"),
+            "Dockerfile",
+            Service(
+                name=(name := "replace_using_package_version"),
+                param=[("file", "Dockerfile"), ("regex", regex), ("package", pkg)],
+            ),
+        ),
+        # the default file name is ignored if the parameter file_name is given
+        (
+            Replacement(regex, pkg, file_name=(fname := "testfile")),
+            "Dockerfile",
+            Service(
+                name=name,
+                param=[("file", fname), ("regex", regex), ("package", pkg)],
+            ),
+        ),
+        # specify a parse_version
+        (
+            Replacement(regex, pkg, parse_version=ParseVersion.MAJOR),
+            "Dockerfile",
+            Service(
+                name=name,
+                param=[
+                    ("file", "Dockerfile"),
+                    ("regex", regex),
+                    ("package", pkg),
+                    ("parse-version", "major"),
+                ],
+            ),
+        ),
+    ],
+)
+def test_replacement_to_service(
+    replacement: Replacement, default_file_name: str, service: Service
+):
+    assert replacement.to_service(default_file_name) == service
+
+
 _BASE_KWARGS = {
     "name": "test",
     "package_name": "test-image",