chore: Check dependency issues with deptry (#2416)

.github/workflows/test.yml

@@ -54,6 +54,7 @@ jobs:
         - { session: tests,   python-version: "3.12", os: "ubuntu-latest", sqlalchemy: "1" }
         - { session: doctest, python-version: "3.12", os: "ubuntu-latest", sqlalchemy: "2" }
         - { session: mypy,    python-version: "3.12",  os: "ubuntu-latest", sqlalchemy: "2" }
+        - { session: deps,    python-version: "3.12",  os: "ubuntu-latest", sqlalchemy: "2" }
 
     steps:
     - uses: actions/checkout@v4

noxfile.py

@@ -111,6 +111,14 @@ def benches(session: Session) -> None:
     )
 
 
+@session(name="deps", python=python_versions)
+def dependencies(session: Session) -> None:
+    """Check issues with dependencies."""
+    session.install(".[s3,testing]")
+    session.install("deptry")
+    session.run("deptry", "singer_sdk", *session.posargs)
+
+
 @session(python=main_python_version)
 def update_snapshots(session: Session) -> None:
     """Update pytest snapshots."""

pyproject.toml

@@ -118,6 +118,7 @@ faker = ["faker"]
 
 [tool.poetry.group.dev.dependencies]
 coverage = {extras = ["toml"], version = ">=7.4"}
+deptry = ">=0.15.0"
 
 # TODO: Remove the Python 3.12 marker when DuckDB supports it
 duckdb = { version = ">=0.8.0", python = "<3.12" }
@@ -221,6 +222,43 @@ exclude_also = [
 fail_under = 82
 show_missing = true
 
+[tool.deptry]
+known_first_party = ["singer_sdk"]
+pep621_dev_dependency_groups = ["testing"]
+
+[tool.deptry.package_module_name_map]
+backports-datetime-fromisoformat = "backports"
+importlib-metadata = "importlib_metadata"
+importlib-resources = "importlib_resources"
+PyJWT = "jwt"
+types-jsonschema = "jsonschema"
+types-pytz = "pytz"
+types-PyYAML = "yaml"
+types-requests = "requests"
+
+[tool.deptry.per_rule_ignores]
+DEP002 = [
+    # Deprecated dependencies
+    "python-dateutil",
+    # Transitive constraints
+    "numpy",
+    "urllib3",
+    # Python version-specific dependencies
+    "backports-datetime-fromisoformat",
+    # Docs extras
+    "furo",
+    "myst-parser",
+    "sphinx",
+    "sphinx-autobuild",
+    "sphinx-copybutton",
+    "sphinx-inline-tabs",
+    "sphinx-notfound-page",
+    "sphinx-reredirects",
+    # Plugins
+    "fs-s3fs",
+    "pytest-durations",
+]
+
 [tool.mypy]
 exclude = "tests"
 files = "singer_sdk"