Split the Template trait into a data half and a logic half. Every
template is now declared by a manifest under data/templates/<id>/
(CLI id, wizard label, detection markers, Build-Depends, architecture,
rules dh line, rules-extra body, control source fields, gitignore
entries and static file bodies with {placeholder} substitution),
embedded through the TEMPLATE_SOURCES index and parsed once into the
registry; the order of the index is the wizard menu order and the
detection priority at once. The logic half is the slim TemplateHooks
trait (probe, post_write, file-body overrides merged over the manifest
bodies by path shadowing, Build-Depends/architecture amendments and
extra context values), registered per template as a HOOKS static: a
template without hooks needs zero Rust.
- TemplateId becomes a Copy wrapper of the stable CLI string; the
enum, its all/as_str/display_name/from_label matches and the old
statics array collapse into the registry accessors.
- rust's rules overrides move to data/templates/rust/rules.extra.tpl
with {locked}/{artifact} hook context; python's backend table,
meson/cmake's pkg-config opt-in, autotools' gettext and python's
C-extension hints become hook amendments over the manifest baseline.
- detect.rs drops its hardcoded marker cascade: the manifests'
detect.files drive detection in registry order, with the shell
single-script heuristic and the never-detected empty template kept
as the code special cases they are. License sniffing is untouched.
- The template tests port to manifest validation: registry coverage
and stable order, placeholder presence in the rendering context,
rules composition, the Build-Depends/architecture/dh-line table now
asserted against the manifest data, and the hook shadowing merge.
The static skeleton bodies of the shell/empty/makefile/go templates
stay in their Rust hooks for now; the next commit moves them into
their manifests.
vhaudiquet