Add a repository-local host installer

tools/install-to-host

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "$0")/.." && pwd)"
+install_dir="${LAZARET_INSTALL_DIR:-$HOME/.local/bin}"
+
+usage() {
+    printf '%s\n' "usage: tools/install-to-host [--install-dir DIRECTORY]"
+}
+
+if [ "${1:-}" = "--help" ] && [ "$#" -eq 1 ]; then
+    usage
+    exit 0
+elif [ "${1:-}" = "--install-dir" ] && [ "$#" -eq 2 ]; then
+    install_dir="$2"
+elif [ "$#" -ne 0 ]; then
+    usage >&2
+    exit 2
+fi
+
+for command in cargo install; do
+    command -v "$command" >/dev/null 2>&1 || {
+        printf '%s\n' "install-to-host: $command is required" >&2
+        exit 1
+    }
+done
+
+cd "$root"
+tools/materialize-fuser
+cargo build \
+    --release \
+    --locked \
+    --package lazaret-client \
+    --package lazaret-host-coordinator \
+    --package lazaret-escalation-client \
+    --bins
+
+target_dir="${CARGO_TARGET_DIR:-target}"
+if [[ "$target_dir" != /* ]]; then
+    target_dir="$root/$target_dir"
+fi
+
+install -d -m 755 "$install_dir"
+for executable in lazaret lazaret-host-coordinator lazaret-escalation-client; do
+    install -m 755 "$target_dir/release/$executable" "$install_dir/$executable"
+done
+
+printf '%s\n' "Installed Lazaret in $install_dir"