Module template 

Template preprocessor — renders Jinja2-style templates via MiniJinja through burgertocow’s Tracker.

Matches files with configurable extensions (default: .tmpl, .template), renders them against a variable context with three namespaces:

• dodot.* — built-in values (os, arch, hostname, username, home, dotfiles_root), computed once at preprocessor construction.
• env.* — dynamic lookup of process environment variables.
• bare names — user-defined variables from [preprocessor.template.vars] in .dodot.toml.

Uses MiniJinja strict undefined-behaviour: references to missing vars raise a render error rather than silently producing empty strings.

Tracked render

Rendering goes through burgertocow::Tracker rather than a raw minijinja::Environment. The tracker installs a custom formatter that wraps every variable emission in marker bytes, producing a [TrackedRender] alongside the visible output. The visible output is identical to the plain-MiniJinja path (modulo the keep_trailing_newline setting that Tracker also applies). The marker-annotated string is persisted in the baseline cache so the reverse-merge pipeline (dodot transform check, the clean filter) can compute template-space diffs without re-rendering — re-rendering at clean-filter time would re-trigger any secret-provider auth prompts on every git status.

Structs

TemplatePreprocessor

Template rendering preprocessor. Generative (one-way) transform.