#!/bin/bash

# Build tmuxrdr from this checkout and install it as ~/.local/bin/tmuxrdr
# (or $TMUXRDR_BIN). cargo's output is herdr's binary, target/release/herdr;
# the name it is installed under is all the renaming there is -- it starts its
# server from its own path, and src/config/io.rs gives it its own directories.
#
# Toolchains, found without PATH or shell-profile changes:
#   Rust     the version rust-toolchain.toml pins, through rustup; Homebrew's
#            keg-only rustup (/opt/homebrew/opt/rustup/bin) is used when no
#            cargo is on PATH
#   Zig      exactly 0.16.0, which herdr's vendored libghostty-vt requires:
#            $ZIG, else ~/.local/opt/zig-0.16.0/zig
#   sfw      Socket Firewall, which every crate fetch goes through (Zig's
#            packages are fetched first, by Zig, hash-checked)
#
# The binary is replaced by a rename, so a running tmuxrdr server keeps the
# old one until it is restarted.

set -euo pipefail

repo="$(cd "$(dirname "$0")/../.." && pwd -P)"
dest="${TMUXRDR_BIN:-$HOME/.local/bin/tmuxrdr}"

die() { >&2 echo "ERROR: $*"; exit 1; }

if ! command -v cargo >/dev/null && [[ -x /opt/homebrew/opt/rustup/bin/cargo ]]; then
  PATH="/opt/homebrew/opt/rustup/bin:$PATH"
fi
command -v cargo >/dev/null || die "no cargo: brew install rustup"
command -v sfw >/dev/null || die "no sfw: crates are fetched through Socket Firewall"

export ZIG="${ZIG:-$HOME/.local/opt/zig-0.16.0/zig}"
[[ -x "$ZIG" ]] || die "no Zig at $ZIG (needs exactly 0.16.0: ziglang.org/download, signature-checked)"
[[ "$("$ZIG" version)" == "0.16.0" ]] || die "$ZIG is Zig $("$ZIG" version), not 0.16.0"

cd "$repo"
# Zig's packages are fetched by Zig itself, each checked against the hash
# build.zig.zon pins -- not through sfw, whose proxy breaks Zig's downloads
# (400 Bad Request). With them cached, the build itself needs only crates.
(cd vendor/libghostty-vt && "$ZIG" build --fetch=all)
sfw cargo build --release --locked

mkdir -p "$(dirname "$dest")"
cp target/release/herdr "$dest.new"
mv -f "$dest.new" "$dest"
echo "installed: $dest ($("$dest" --version))"

if "$dest" status server 2>/dev/null | grep -q 'status: running'; then
  echo "A tmuxrdr server is running the previous build; it switches on its next"
  echo "start (tmuxrdr server stop ends it, and its panes)."
fi