Install

tern is a single Rust binary, built from its source on GitHub with cargo.

Requirements

• Rust: a recent stable toolchain (rustup, or your distro’s cargo). The crate uses edition 2021.
• A terminal with true color. For icons, use a Nerd Font. Omarchy ships JetBrainsMono Nerd Font. Without one, set icons = false.
• Linux helpers. Each of these is optional, and each lights up one feature:

Tool	Used for
notify-send	desktop notifications (Omarchy’s mako shows them)
wl-copy	y, which copies an address or link to the clipboard
xdg-open	o (HTML mail in the browser), event links, unsubscribe links, the OAuth sign-in page
$EDITOR (or nvim, vim, vi, nano)	:e in the composer

Build and install

cargo install --git https://github.com/etmartinkazoo/tern

Or from a checkout, if you want to read or change the code:

git clone https://github.com/etmartinkazoo/tern
cd tern
cargo install --path .

That builds a release binary and puts it in ~/.cargo/bin/tern. If ~/.cargo/bin isn’t on your PATH, add it, or link the binary somewhere that is:

ln -s ~/.cargo/bin/tern ~/.local/bin/tern

To build without installing:

cargo build --release   # in the checkout
./target/release/tern --demo

Check it

tern --version
tern --demo

--demo opens a fake mailbox, calendar and contacts list, so you can learn the keys before connecting anything. Next: the quick start.

Updating

Run cargo install --git https://github.com/etmartinkazoo/tern again (or git pull and cargo install --path . in a checkout). The config file and your data in ~/.config/tern, ~/.cache/tern and ~/.local/share/tern are left alone. See Files.