66 lines
4.7 KiB
Markdown
66 lines
4.7 KiB
Markdown
# vamp
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A modal Rust editor with a replaceable frontend and subprocess-isolated Ruby plugins.
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## Run
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Requires current stable Rust and an interactive terminal. Ruby 2.6+ with its standard-library JSON support is required only for configuration/plugins; no Ruby gems are needed to run vamp itself.
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```sh
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cargo run -- --no-config notes.txt
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cargo run -- --config examples/config.rb notes.txt
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```
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Without a file, vamp opens an unnamed buffer. A nonexistent file opens an empty buffer. `cargo run -- --help` lists the command-line options.
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## Getting started
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Vamp starts in Normal mode. Press `i`, type text, then Esc to return to Normal. Type `:w` and Enter to save, or `:w path` to name an unnamed buffer. Type `:q` and Enter to quit; it refuses unsaved changes in any open buffer. `:q!` explicitly discards changes and quits.
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| Task | Default keys |
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| --- | --- |
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| Move in Normal | `h`/`j`/`k`/`l` or arrows; `w`/`b`/`e` for words |
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| First/last line in Normal or Visual | `gt` / `gb`, at first nonblank; Visual extends the selection |
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| Enter/leave Insert | `i` / Esc |
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| Manual LSP completion in Insert | Ctrl+n starts/cycles next; Ctrl+j/k cycles next/previous, replacing text live |
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| Edit completion snippet arguments | Type to replace the highlighted argument; Tab / Shift+Tab moves next/previous |
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| Save in Normal | Space then `w`, or `:w` then Enter |
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| Undo/redo in Normal | `u` / `U` (Shift+u) |
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| Delete/change whole lines in Normal | `dd` / `cc`; leading counts work (`3dd`, `2cc`) |
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| Search in Normal | `/`, type a literal query, Enter; `n`/`N` for next/previous |
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| Select/copy/cut | `v` characterwise or `V` whole rows, move to extend, then `y`/`d` in Visual |
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| Paste in Normal | `p`/`P` after/before the caret or row for linewise fragments; system clipboard by default |
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| Command palette | Ctrl+p; type to filter, arrows select, Enter accepts, Esc cancels |
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| Floating/docked explorer in Normal or Visual | Space then `o` / Space then `e` |
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| Repository diff in Normal | `:diff`; choose Before then After, Tab changes category, type to search; Working checkout After is editable; `:diff.close` exits |
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Space is the default leader: press its suffix keys in order, not simultaneously. The [editing guide](docs/editing.md) contains the complete key table and behavior reference.
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## Configuration
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By default, vamp loads `$XDG_CONFIG_HOME/vamp/config.rb`, or `~/.config/vamp/config.rb` when that environment variable is unset. `--config path` selects a file explicitly; `--no-config` bypasses Ruby entirely and uses defaults.
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Start with [`examples/config.rb`](examples/config.rb). The [configuration reference](docs/configuration.md) covers preferences, bindings, and native LSP setup. Language servers are **disabled by default**; install a trusted server and explicitly enable it.
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Ruby configuration and plugins run with your account's filesystem/process permissions. Subprocess isolation is **not a security sandbox**; load only trusted scripts.
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## Current limits
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- One visible buffer at a time; no splits/tabs or graphical frontend.
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- Modal editing, not full Vim compatibility: characterwise and linewise Visual selections and counted `dd`/`cc`, but no block selection, named registers, or general operator–motion grammar. Search is literal, case-sensitive, and single-line.
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- Native opt-in LSP supports diagnostics, go-to-definition, plain-text hover, manual primary-caret completion with snippet arguments, and automatic semantic highlighting—not rename, formatting, or code actions. Completion has no automatic popup or acceptance step; other carets are preserved and translated through the chosen edits. Snippet regex transforms and unresolved variables without defaults are omitted.
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- System clipboard access supports macOS and Linux. Separate clipboard mode keeps internal editing available on unsupported/headless environments.
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Performance and subprocess limits are documented in [development](docs/development.md#performance-and-process-limits).
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## Documentation
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| Guide | Contents |
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| --- | --- |
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| [Editing](docs/editing.md) | Keys, motions/counts, selections, repeat, clipboard, search, buffers, explorer, palette, syntax highlighting |
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| [Configuration](docs/configuration.md) | Ruby startup, preferences, action/mode reference, key notation, leader/list/tree bindings, native LSP |
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| [Plugins](docs/plugins.md) | Ruby API, capabilities, effects, asynchronous callbacks, isolation, messaging protocol |
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| [Architecture](docs/architecture.md) | Module ownership, session/frontend contracts, terminal lifecycle, syntax caches, native workers |
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| [Development](docs/development.md) | Verification commands, test organization, performance and process limits |
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| [Project context](CONTEXT.md) | Terminology and configuration-interface conventions |
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