naps62-yolo
2da41cc720
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New `maestro-installer` crate exposing the `maestro-install` binary. Bootstrap flow: `cargo install --git ... maestro-installer && maestro-install` runs `cargo install` for `maestro-daemon` and `maestro-cli`, optionally drives `maestrod configure`, and on systemd hosts writes a user unit at `~/.config/systemd/user/maestrod.service` plus reload/enable/start. Pure builders (cargo install args, systemctl args, unit body) live in the lib and are unit-tested; main.rs is the prompt glue. Refs NAP-225.
103 lines
3.3 KiB
Rust
103 lines
3.3 KiB
Rust
//! systemd detection + user-unit rendering.
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//!
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//! The wizard only ever writes a *user* unit (`~/.config/systemd/user/`), since
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//! `maestrod` runs per-user and uses tmux sockets in the user's runtime dir.
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use std::path::{Path, PathBuf};
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/// Standard probe path. Present on hosts booted under systemd.
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pub const SYSTEMD_PROBE_PATH: &str = "/run/systemd/system";
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/// Filename written under `~/.config/systemd/user/`.
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pub const UNIT_FILE_NAME: &str = "maestrod.service";
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/// `true` when the given path exists. Production callers should pass
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/// [`SYSTEMD_PROBE_PATH`]; tests inject a temp path so they're hermetic.
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pub fn is_systemd_host(probe: &Path) -> bool {
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probe.exists()
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}
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/// `~/.config/systemd/user/maestrod.service`. `None` if `$HOME` / config dir
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/// is unresolvable.
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pub fn user_unit_path() -> Option<PathBuf> {
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let base = dirs::config_dir()?;
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Some(base.join("systemd").join("user").join(UNIT_FILE_NAME))
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}
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/// Render the unit file body. `exec_start` is the absolute path to `maestrod`
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/// — we default to `~/.cargo/bin/maestrod` because that's where `cargo install`
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/// lands binaries; systemd doesn't inherit the user's PATH, so we can't rely
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/// on a bare `maestrod`.
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pub fn render_user_unit(exec_start: &Path) -> String {
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format!(
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"[Unit]\n\
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Description=Maestro per-host daemon (maestrod)\n\
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Documentation=https://git.naps.pt/naps62/maestro\n\
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After=network-online.target\n\
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\n\
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[Service]\n\
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Type=simple\n\
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ExecStart={exec}\n\
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Restart=on-failure\n\
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RestartSec=5\n\
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\n\
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[Install]\n\
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WantedBy=default.target\n",
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exec = exec_start.display()
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)
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}
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/// Default `ExecStart` target: `~/.cargo/bin/maestrod`. `None` if `$HOME` is
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/// unresolvable.
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pub fn default_maestrod_path() -> Option<PathBuf> {
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Some(
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dirs::home_dir()?
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.join(".cargo")
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.join("bin")
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.join("maestrod"),
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)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn is_systemd_host_true_when_probe_exists() {
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let dir = tempfile::tempdir().unwrap();
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let probe = dir.path().join("system");
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std::fs::create_dir(&probe).unwrap();
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assert!(is_systemd_host(&probe));
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}
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#[test]
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fn is_systemd_host_false_when_probe_missing() {
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let dir = tempfile::tempdir().unwrap();
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let probe = dir.path().join("not-here");
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assert!(!is_systemd_host(&probe));
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}
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#[test]
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fn unit_renders_with_absolute_exec_start() {
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let body = render_user_unit(Path::new("/home/alice/.cargo/bin/maestrod"));
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assert!(body.contains("ExecStart=/home/alice/.cargo/bin/maestrod"));
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assert!(body.contains("[Unit]"));
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assert!(body.contains("[Service]"));
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assert!(body.contains("[Install]"));
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assert!(body.contains("WantedBy=default.target"));
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assert!(body.contains("Restart=on-failure"));
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}
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#[test]
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fn unit_ends_with_newline() {
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let body = render_user_unit(Path::new("/x"));
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assert!(body.ends_with('\n'), "unit must end with newline");
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}
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#[test]
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fn user_unit_path_points_under_config_dir() {
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let p = user_unit_path().expect("config dir resolvable in test env");
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assert!(p.ends_with("systemd/user/maestrod.service"), "got {p:?}");
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}
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}
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