Multiselect project type, fix project_slug bug

Author: jpvelez

copier-helper.sh

@@ -13,11 +13,8 @@ uvx copier copy --defaults --force --trust \
   --data email="hello@switch.box" \
   --data author_github_handle="switchbox-data" \
   --data project_name="example-project" \
-  --data project_slug="example_project" \
   --data project_description="Example" \
-  --data python_data_science="y" \
-  --data python_package="y" \
-  --data r_data_science="n" \
+  --data project_features="[python_data_science, python_package]" \
   --data use_github="y" \
   --data open_source_license="MIT license" \
   --data aws="n" \

copier.yml

@@ -27,8 +27,8 @@ project_name:
 
 project_slug:
   type: str
-  default: "[[ project_name|lower|replace('-', '_') ]]"
-  help: Importable Python package name
+  default: "{{ project_name|lower|replace('-', '_') }}"
+  when: false
 
 project_description:
   type: str
@@ -40,23 +40,15 @@ type_checker:
   default: "ty"
   when: "{{ python == 'y' }}"
 
-python_data_science:
-  type: str
-  choices: ["y", "n"]
-  default: "y"
-  help: "Include Python data science tools (polars, pyarrow, seaborn, numpy, quarto, notebooks) - At least one of: python_data_science, python_package, or r_data_science must be selected"
-
-python_package:
+project_features:
   type: str
-  choices: ["y", "n"]
-  default: "y"
-  help: "Include Python package publishing tools (build, twine, mkdocs documentation) - At least one of: python_data_science, python_package, or r_data_science must be selected"
-
-r_data_science:
-  type: str
-  choices: ["y", "n"]
-  default: "n"
-  help: "Include R data science tools (R, renv, Quarto, R extensions) - At least one of: python_data_science, python_package, or r_data_science must be selected"
+  multiselect: true
+  choices:
+    - python_data_science
+    - python_package
+    - r_data_science
+  default: [python_data_science, python_package]
+  help: "Select project features (use space to select/deselect, enter to confirm)"
 
 use_github:
   type: str
@@ -83,7 +75,23 @@ aws:
 # Computed variables
 python:
   type: str
-  default: "{{ 'y' if (python_data_science == 'y' or python_package == 'y') else 'n' }}"
+  default: "{{ 'y' if ('python_data_science' in project_features or 'python_package' in project_features) else 'n' }}"
+  when: false
+
+# Backward compatibility computed variables
+python_data_science:
+  type: str
+  default: "{{ 'y' if 'python_data_science' in project_features else 'n' }}"
+  when: false
+
+python_package:
+  type: str
+  default: "{{ 'y' if 'python_package' in project_features else 'n' }}"
+  when: false
+
+r_data_science:
+  type: str
+  default: "{{ 'y' if 'r_data_science' in project_features else 'n' }}"
   when: false
 
 # Post-generation tasks

tests/test_template.py

@@ -38,11 +38,9 @@ def test_python_data_science(tmp_path: Path) -> None:
             "email": "hello@switch.box",
             "author_github_handle": "switchbox-data",
             "project_name": "py-proj",
-            "project_slug": "py_proj",
             "project_description": "Test py",
             "type_checker": "ty",
-            "python_data_science": "y",
-            "python_package": "n",
+            "project_features": "[python_data_science]",
             "use_github": "y",
             "open_source_license": "MIT license",
             "aws": "y",
@@ -73,10 +71,8 @@ def test_python_minimal(tmp_path: Path) -> None:
             "email": "hello@switch.box",
             "author_github_handle": "switchbox-data",
             "project_name": "minimal-proj",
-            "project_slug": "minimal_proj",
             "project_description": "Minimal Python project",
-            "python_data_science": "y",
-            "python_package": "n",
+            "project_features": "[python_data_science]",
             "use_github": "n",
             "open_source_license": "MIT license",
             "aws": "n",
@@ -107,10 +103,8 @@ def test_no_python_features(tmp_path: Path) -> None:
             "email": "hello@switch.box",
             "author_github_handle": "switchbox-data",
             "project_name": "no-python-proj",
-            "project_slug": "no_python_proj",
             "project_description": "Project with no Python features",
-            "python_data_science": "n",
-            "python_package": "n",
+            "project_features": "[]",
             "use_github": "y",
             "open_source_license": "MIT license",
             "aws": "n",
@@ -133,11 +127,9 @@ def test_python_mkdocs_only(tmp_path: Path) -> None:
             "email": "hello@switch.box",
             "author_github_handle": "switchbox-data",
             "project_name": "docs-proj",
-            "project_slug": "docs_proj",
             "project_description": "Docs only",
             "type_checker": "mypy",
-            "python_data_science": "n",
-            "python_package": "y",
+            "project_features": "[python_package]",
             "use_github": "y",
             "open_source_license": "MIT license",
             "aws": "n",