1 files changed, 90 insertions, 0 deletions
diff --git a/src/debputy/exceptions.py b/src/debputy/exceptions.py
new file mode 100644
index 0000000..a445997
--- /dev/null
+++ b/src/debputy/exceptions.py
@@ -0,0 +1,90 @@
+from typing import cast, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from debputy.plugin.api.impl_types import DebputyPluginMetadata
+
+
+class DebputyRuntimeError(RuntimeError):
+    @property
+    def message(self) -> str:
+        return cast("str", self.args[0])
+
+
+class DebputySubstitutionError(DebputyRuntimeError):
+    pass
+
+
+class DebputyManifestVariableRequiresDebianDirError(DebputySubstitutionError):
+    pass
+
+
+class DebputyDpkgGensymbolsError(DebputyRuntimeError):
+    pass
+
+
+class SymlinkLoopError(ValueError):
+    @property
+    def message(self) -> str:
+        return cast("str", self.args[0])
+
+
+class PureVirtualPathError(TypeError):
+    @property
+    def message(self) -> str:
+        return cast("str", self.args[0])
+
+
+class TestPathWithNonExistentFSPathError(TypeError):
+    @property
+    def message(self) -> str:
+        return cast("str", self.args[0])
+
+
+class DebputyFSError(DebputyRuntimeError):
+    pass
+
+
+class DebputyFSIsROError(DebputyFSError):
+    pass
+
+
+class PluginBaseError(DebputyRuntimeError):
+    pass
+
+
+class DebputyPluginRuntimeError(PluginBaseError):
+    pass
+
+
+class PluginNotFoundError(PluginBaseError):
+    pass
+
+
+class PluginInitializationError(PluginBaseError):
+    pass
+
+
+class PluginMetadataError(PluginBaseError):
+    pass
+
+
+class PluginConflictError(PluginBaseError):
+    @property
+    def plugin_a(self) -> "DebputyPluginMetadata":
+        return cast("DebputyPluginMetadata", self.args[1])
+
+    @property
+    def plugin_b(self) -> "DebputyPluginMetadata":
+        return cast("DebputyPluginMetadata", self.args[2])
+
+
+class PluginAPIViolationError(PluginBaseError):
+    pass
+
+
+class UnhandledOrUnexpectedErrorFromPluginError(PluginBaseError):
+    pass
+
+
+class DebputyMetadataAccessError(DebputyPluginRuntimeError):
+    pass