Refresh tasks.py to work with uv

- drop poetry from the tools
- special-case installing uv
- replace poetry instructions with uv instructions

tasks.py

@@ -8,24 +8,21 @@
 
 PKG_NAME = "webassets"
 PKG_PATH = Path(f"pelican/plugins/{PKG_NAME}")
-TOOLS = ("poetry", "pre-commit")
+TOOLS = ["pre-commit"]
 
 ACTIVE_VENV = os.environ.get("VIRTUAL_ENV", None)
 VENV_HOME = Path(os.environ.get("WORKON_HOME", "~/.local/share/virtualenvs"))
 VENV_PATH = Path(ACTIVE_VENV) if ACTIVE_VENV else (VENV_HOME.expanduser() / PKG_NAME)
 VENV = str(VENV_PATH.expanduser())
 BIN_DIR = "bin" if os.name != "nt" else "Scripts"
 VENV_BIN = Path(VENV) / Path(BIN_DIR)
-POETRY = which("poetry") if which("poetry") else (VENV_BIN / "poetry")
-CMD_PREFIX = f"{VENV_BIN}/" if ACTIVE_VENV else f"{POETRY} run "
-PRECOMMIT = which("pre-commit") if which("pre-commit") else f"{CMD_PREFIX}pre-commit"
 PTY = True if os.name != "nt" else False
 
 
 @task
 def tests(c):
     """Run the test suite."""
-    c.run(f"{CMD_PREFIX}pytest", pty=PTY)
+    c.run("uv run pytest", pty=PTY)
 
 
 @task
@@ -36,7 +33,7 @@ def ruff(c, fix=False, diff=False):
         fix_flag = "--fix"
     if diff:
         diff_flag = "--diff"
-    c.run(f"{CMD_PREFIX}/ruff check {diff_flag} {fix_flag} .", pty=PTY)
+    c.run(f"uv run ruff check {diff_flag} {fix_flag} .", pty=PTY)
 
 
 @task
@@ -46,38 +43,60 @@ def lint(c, fix=False, diff=False):
 
 
 @task
+def uv(c):
+    """Install uv in the local virtual environment."""
+    if not which("uv"):
+        print("** Installing uv in the project virual environment.")
+        c.run(f"{VENV_BIN}/python -m pip install uv", pty=PTY)
+
+
+@task(pre=[uv])
 def tools(c):
     """Install development tools in the virtual environment if not already on PATH."""
     for tool in TOOLS:
         if not which(tool):
             print(f"** Installing {tool}.")
-            c.run(f"{CMD_PREFIX}pip install {tool}")
+            c.run(f"uv pip install {tool}")
 
 
-@task
+@task(pre=[tools])
 def precommit(c):
     """Install pre-commit hooks to `.git/hooks/pre-commit`."""
     print("** Installing pre-commit hooks.")
-    c.run(f"{PRECOMMIT} install")
+    pre_commit_cmd = (
+        which("pre-commit") if which("pre-commit") else f"{VENV_BIN}pre-commit"
+    )
+    c.run(f"{pre_commit_cmd} install")
 
 
 @task
 def setup(c):
-    """Set up the development environment."""
-    if which("poetry") or ACTIVE_VENV:
-        tools(c)
-        c.run(f"{CMD_PREFIX}python -m pip install --upgrade pip")
-        c.run(f"{POETRY} install")
-        precommit(c)
-        print("\nDevelopment environment should now be set up and ready!\n")
-    else:
+    """Set up the development environment. You must have `uv` installed."""
+    if not which("uv"):
         error_message = """
-            Poetry is not installed, and there is no active virtual environment available.
+            uv is not installed, and there is no active virtual environment available.
             You can either manually create and activate a virtual environment, or you can
-            install Poetry via:
+            install uv by running the following command:
 
-            curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python -
+            curl -LsSf https://astral.sh/uv/install.sh | sh
 
             Once you have taken one of the above two steps, run `invoke setup` again.
             """  # noqa: E501
         sys.exit(cleandoc(error_message))
+
+    global ACTIVE_VENV
+    if not ACTIVE_VENV:
+        print("** Creating a virtual environment.")
+        c.run("uv venv")
+        ACTIVE_VENV = ".venv"
+
+    tools(c)
+    c.run("uv sync")
+    precommit(c)
+    success_message = """
+        Development environment should now be set up and ready.
+
+        To enable running invoke, either run it with `uv run inv` or
+        activate the virtual environment with `source .venv/bin/activate`
+        """
+    print(cleandoc(success_message))