Valdemar Lorenzen
86 lines
2.9 KiB
Rust
86 lines
2.9 KiB
Rust
use std::{env, path::PathBuf};
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use vamp::{session::EditorSession, tui};
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const HELP: &str = "vamp — modal editor with isolated Ruby plugins
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Usage: vamp [--config PATH | --no-config] [FILE]
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Default keys (configurable with config.bind):
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Normal: i/a insert, I/A insert at first nonblank/end, o/O new line
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h/j/k/l move, 0/$ line ends, x delete, J join lines
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u undo, U redo, : command, / search, n/N next/previous match
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Insert: Esc returns to normal
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Search: Enter finds next literal match, Esc cancels (case-sensitive, wraps)
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Commands: :w [PATH], :q, :q!, :wq [PATH], :plugins, :PLUGIN [ARGS]
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Ruby config: $XDG_CONFIG_HOME/vamp/config.rb or ~/.config/vamp/config.rb
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Set VAMP_RUBY to choose the Ruby executable.";
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struct Options {
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file: Option<PathBuf>,
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config: Option<PathBuf>,
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}
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fn options() -> Result<Option<Options>, String> {
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let mut args = env::args_os().skip(1);
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let mut file = None;
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let mut config = None;
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let mut config_selected = false;
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let mut positional = false;
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while let Some(arg) = args.next() {
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if !positional && (arg == "--help" || arg == "-h") {
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println!("{HELP}");
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return Ok(None);
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} else if !positional && arg == "--" {
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positional = true;
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} else if !positional && arg == "--config" {
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if config_selected {
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return Err("use only one of --config and --no-config".into());
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}
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config = Some(PathBuf::from(
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args.next().ok_or("--config requires a path")?,
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));
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config_selected = true;
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} else if !positional && arg == "--no-config" {
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if config_selected {
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return Err("use only one of --config and --no-config".into());
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}
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config_selected = true;
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} else if !positional && arg.to_string_lossy().starts_with('-') {
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return Err(format!("unknown option: {}", arg.to_string_lossy()));
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} else if file.replace(PathBuf::from(arg)).is_some() {
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return Err("only one file can be opened".into());
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}
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}
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if !config_selected {
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let home = env::var_os("XDG_CONFIG_HOME")
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.map(PathBuf::from)
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.or_else(|| env::var_os("HOME").map(|home| PathBuf::from(home).join(".config")));
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config = home
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.map(|home| home.join("vamp/config.rb"))
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.filter(|path| path.exists());
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}
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Ok(Some(Options { file, config }))
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}
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fn run() -> Result<(), String> {
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let Some(options) = options()? else {
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return Ok(());
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};
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let mut session = EditorSession::open(
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options.file,
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tui::CAPABILITIES.iter().map(|s| (*s).to_owned()).collect(),
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options.config.as_deref(),
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)
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.map_err(|error| format!("cannot open file: {error}"))?;
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tui::run(&mut session).map_err(|error| format!("terminal error: {error}"))
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}
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fn main() {
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if let Err(error) = run() {
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eprintln!("vamp: {error}");
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std::process::exit(1);
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}
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}
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