things/new.py

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#!/usr/bin/env python3
from typing import Any, Literal, Optional
from tomllib import load
from pathlib import Path
from dataclasses import dataclass, field
import questionary
TEMPLATES_DIR = Path("./_templates")
@dataclass(frozen=True)
class TemplateParameter:
prompt: str
default: Optional[Any] = None
@dataclass
class ProjectTemplate:
name: str
path: Path
templates: list[str] = field(default_factory=list)
parameters: dict[str, TemplateParameter] = field(default_factory=dict)
templates: dict[str, ProjectTemplate] = {}
for v in TEMPLATES_DIR.rglob("template.toml"):
with v.open("rb") as fp:
data = load(fp)
tpl = ProjectTemplate(
data.get('name', str(v.parent.relative_to(TEMPLATES_DIR))),
v.parent,
data.get('templates', []),
{
k: TemplateParameter(**v)
for k, v in data.get('params', {}).items()
}
)
templates[tpl.name] = tpl
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project_name: Optional[str] = questionary.text("Project name").ask()
if not project_name:
exit(1)
template: Optional[ProjectTemplate] = questionary.select("Template", [
questionary.Choice(tpl.name, tpl) for tpl in templates.values()
]).ask()
if not template:
exit(1)
parameters = questionary.prompt([
{
"type": "text",
"name": k,
"message": param.prompt,
"default": param.default
}
for k, param in template.parameters.items()
])
if not parameters:
exit(1)
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project_dir = Path(project_name)
project_dir.mkdir(parents=True, exist_ok=True)
for base, dirs, files in template.path.walk():
for dirname in dirs:
(base / dirname).mkdir(exist_ok=True, parents=True)
for filename in files:
in_path = base / filename
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file_name = str(in_path.relative_to(template.path))
out_path = project_dir / file_name
if file_name == "template.toml":
continue
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elif file_name in template.templates:
print("TMPL", out_path)
with in_path.open("r") as fp_in:
with out_path.open("w") as fp_out:
for line in fp_in:
line = line.replace("__PROGNAME", project_name.split("/")[-1])
line = line.replace("__PROJECT", project_name)
for param in template.parameters:
line = line.replace(f"__{param}", parameters[param])
fp_out.write(line)
else:
print("COPY", out_path)
with in_path.open("rb") as fp_in:
with out_path.open("wb") as fp_out:
while (chunk := fp_in.read(32768)):
fp_out.write(chunk)