Package-based project templates (multi-level --template)#112
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mcpp new --template now accepts a multi-level SPEC: a bare name resolves
the builtin registry first (frozen: bin; gui = transitional deprecation
alias), then falls through to a package template — pkg | pkg:tmpl |
pkg@ver | pkg@ver:tmpl. Packages opt in by shipping templates/<name>/
(template.toml metadata: description / default / post_message /
[template.inject] self features).
New mcpp.scaffold module: SPEC parsing, {{project.name}}/{{self.name}}/
{{self.version}} rendering (.in files; everything else verbatim; pure
data — no hooks/scripts), self-dependency injection (template's own
declaration wins), template listing. new --list-templates <pkg[@ver]>
prints a package's templates with the default marked. Fetch reuses the
dependency machinery (index lua -> semver latest -> install cache).
Builtin gui keeps working with a deprecation pointer; its pinned imgui
version bumps to current as a transitional stopgap (structural fix is
the package template itself: {{self.version}} cannot rot).
e2e 69 (hermetic: pre-seeded install cache + local index lua) covers
L0/L3 resolution, rendering, inject-vs-declared, listing, error paths,
gui deprecation.
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Implements the package-templates design v2 (T1–T5, T7): multi-level
--templateSPEC (bare name → builtin frozen registry → package default template;pkg:tmpl/pkg@ver/pkg@ver:tmpl),mcpp.scaffoldrender engine ({{project.name}}/{{self.name}}/{{self.version}}, pure-data, no scripts),[template.inject]features tie-in,--list-templates, gui deprecation alias. Hermetic e2e 69. Library-side templates (imgui) follow as T6.