dont support sdist->wheel build

README.md

@@ -65,14 +65,14 @@ uv add --dev una
 ```
 
 Then setup the Una workspace. This will generate a structure and an example lib and app.
-```
+```bash
 uv run una create workspace
 rm -rf src
 uv sync
 ```
 
 Have a look at what's been generated:
-```
+```bash
 tree
 ```
 
@@ -99,9 +99,10 @@ tail apps/printer/pyproject.toml
 It added `greeter` as an internal dependency to `printer`.
 It didn't add `cowsay-python`, as transitive external dependencies are only resolved at build-time.
 
-Now you can build your app:
+Now you can build your app. Note that you **must** specify the `--wheel` parameter. Una doesn't currently work for builds that do source -> sdist -> wheel, as these break some things with uv virtual envs.
 ```bash
-uvx --from build pyproject-build --installer=uv --outdir=dist apps/printer
+uvx --from build pyproject-build --installer=uv \
+    --outdir=dist --wheel apps/printer
 # this will inject the cowsay-python external dependency
 ```
 

docs/quickstart.md

@@ -15,14 +15,14 @@ uv add --dev una
 ```
 
 Then setup the Una workspace. This will generate a structure and an example lib and app.
-```
+```bash
 uv run una create workspace
 rm -rf src
 uv sync
 ```
 
 Have a look at what's been generated:
-```
+```bash
 tree
 ```
 
@@ -49,9 +49,10 @@ tail apps/printer/pyproject.toml
 It added `greeter` as an internal dependency to `printer`.
 It didn't add `cowsay-python`, as transitive external dependencies are only resolved at build-time.
 
-Now you can build your app:
+Now you can build your app. Note that you **must** specify the `--wheel` parameter. Una doesn't currently work for builds that do source -> sdist -> wheel, as these break some things with uv virtual envs.
 ```bash
-uvx --from build pyproject-build --installer=uv --outdir=dist apps/printer
+uvx --from build pyproject-build --installer=uv \
+    --outdir=dist --wheel apps/printer
 # this will inject the cowsay-python external dependency
 ```
 

plugins/hatch/hatch_una/hatch_build.py

@@ -19,8 +19,7 @@ class UnaBuildHook(BuildHookInterface[BuilderConfig]):
     def initialize(self, version: str, build_data: dict[str, Any]) -> None:
         via_sdist = Path("PKG-INFO").exists()
         if via_sdist:
-            print("una-build: In sdist, do nothing")
-            return
+            raise ValueError("Una doesn't work for wheels built from sdist")
 
         print("una-build: Injecting internal dependencies")
 
@@ -45,15 +44,9 @@ def initialize(self, version: str, build_data: dict[str, Any]) -> None:
             for f in files:
                 add_dep_files[str(f)] = str(f.relative_to(package_dir))
 
-        add_packages_pyproj = {
-            str(p / util.PYPROJ): str(util.EXTRA_PYPROJ / p.name / util.PYPROJ)
-            for p in package_dirs
-        }
-
         build_data["force_include"] = {
             **build_data["force_include"],
             **add_dep_files,
-            **add_packages_pyproj,
         }
 
 

plugins/hatch/hatch_una/hatch_meta.py

@@ -21,19 +21,14 @@ def update(self, metadata: dict[str, Any]) -> None:
         ext_deps, int_deps = util.get_dependencies(path)
 
         via_sdist = Path("PKG-INFO").exists()
-        members: list[str] = [] if via_sdist else util.get_members()
+        if via_sdist:
+            raise ValueError("Una doesn't work for wheels built from sdist")
+
+        members: list[str] = util.get_members()
 
         add_deps: list[str] = []
         for dep_name in int_deps:
-            # In builds that do src -> sdist -> wheel, the needed pyproject.toml files
-            # will have been copied into the sdist so they're available for the wheel build.
-            # Here we check for both in order.
-
-            dep_path = (
-                util.EXTRA_PYPROJ / Path(dep_name).name
-                if via_sdist
-                else util.find_package_dir(dep_name, members)
-            )
+            dep_path = util.find_package_dir(dep_name, members)
 
             # load all third-party dependencies from this internal dependency into the
             # project.dependencies table

plugins/hatch/hatch_una/util.py

@@ -3,7 +3,6 @@
 from typing import Any
 
 PYPROJ = "pyproject.toml"
-EXTRA_PYPROJ = Path("_extra_pyproj")
 
 
 def load_conf(path: Path) -> dict[str, Any]: