feat: continued inject cli functionality

src/uvx/cli.py

@@ -110,6 +110,9 @@ def _list_normal(name: str, metadata: Maybe[Metadata], verbose: bool = False):
             TAB,
             f"Installed Version: {md.installed_version} on {md.python}.",
         )
+        if md.injected:
+            p = ", ".join([f"'{_}'" for _ in md.injected])
+            rich.print(TAB, f"Injected Packages: {p}")
         rich.print(TAB, "Scripts:", format_bools(md.scripts))
 
 

src/uvx/core.py

@@ -225,7 +225,23 @@ def inject_packages(into: str, package_specs: list[str]) -> Result[str, Exceptio
     if not venv.exists():
         return Err(ValueError(f"'{meta.name}' was not previously installed. Please run 'uvx install {into}' first."))
 
-    return Ok(f"todo in {meta}")
+    # after getting the right venv, load actual metadata (with fallback to previous emptier metadata):
+    meta = read_metadata(venv).unwrap_or(meta)
+
+    with virtualenv(venv), exit_on_pb_error():
+        try:
+            animate(uv("pip", "install", *package_specs), text=f"injecting {package_specs}")
+        except plumbum.ProcessExecutionError as e:
+            return Err(e)
+
+    # todo: update metadata
+    meta.injected = (meta.injected or []) + package_specs
+
+    print(f"{meta = }")
+
+    store_metadata(meta, venv)
+
+    return Ok(f"💉 Injected {package_specs} into {meta.name}.")  # :needle:
 
 
 def remove_dir(path: Path):