1 files changed, 77 insertions, 0 deletions
diff --git a/src/debputy/packaging/debconf_templates.py b/src/debputy/packaging/debconf_templates.py
new file mode 100644
index 0000000..b827763
--- /dev/null
+++ b/src/debputy/packaging/debconf_templates.py
@@ -0,0 +1,77 @@
+import os.path
+import shutil
+import subprocess
+import textwrap
+from typing import List, Dict
+
+from debputy.maintscript_snippet import MaintscriptSnippetContainer, MaintscriptSnippet
+from debputy.packager_provided_files import PackagerProvidedFile
+from debputy.packages import BinaryPackage
+from debputy.packaging.makeshlibs import resolve_reserved_provided_file
+from debputy.plugin.api.spec import FlushableSubstvars
+from debputy.util import _error, escape_shell
+
+# Match debhelper (minus one space in each end, which comes
+# via join).
+LINE_PREFIX = "\\\n            "
+
+
+def process_debconf_templates(
+    binary_package: BinaryPackage,
+    reserved_packager_provided_files: Dict[str, List[PackagerProvidedFile]],
+    maintscript_snippets: Dict[str, MaintscriptSnippetContainer],
+    substvars: FlushableSubstvars,
+    control_output_dir: str,
+) -> None:
+    provided_templates_file = resolve_reserved_provided_file(
+        "templates",
+        reserved_packager_provided_files,
+    )
+    if provided_templates_file is None:
+        return
+
+    templates_file = os.path.join(control_output_dir, "templates")
+    debian_dir = provided_templates_file.parent_dir
+    po_template_dir = debian_dir.get("po") if debian_dir is not None else None
+    if po_template_dir is not None and po_template_dir.is_dir:
+        with open(templates_file, "wb") as fd:
+            cmd = [
+                "po2debconf",
+                provided_templates_file.fs_path,
+            ]
+            print(f"   {escape_shell(*cmd)} > {templates_file}")
+            try:
+                subprocess.check_call(
+                    cmd,
+                    stdout=fd.fileno(),
+                )
+            except subprocess.CalledProcessError:
+                _error(
+                    f"Failed to generate the templates files for {binary_package.name}. Please review "
+                    f" the output of {escape_shell('po-debconf', provided_templates_file.fs_path)}"
+                    " to understand the issue."
+                )
+    else:
+        shutil.copyfile(provided_templates_file.fs_path, templates_file)
+
+    dependency = (
+        "cdebconf-udeb" if binary_package.is_udeb else "debconf (>= 0.5) | debconf-2.0"
+    )
+    substvars.add_dependency("misc:Depends", dependency)
+    if not binary_package.is_udeb:
+        # udebs do not have `postrm` scripts
+        maintscript_snippets["postrm"].append(
+            MaintscriptSnippet(
+                f"debputy (due to {provided_templates_file.fs_path})",
+                # FIXME: `debconf` sourcing should be an overarching feature
+                snippet=textwrap.dedent(
+                    """\
+                    if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ]; then
+                        . /usr/share/debconf/confmodule
+                        db_purge
+                        db_stop
+                    fi
+                """
+                ),
+            )
+        )