add admin scripts over from treehouse

would be nice to rewrite these as a standalone utility that integrates with Nix someday i guess

admin/README.md

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+# `admin`
+
+Bunch of scripts I use to administrate the rkgk instance at <https://rkgk.app>.
+The full setup is:
+
+- A systemd service runs `daemon.bash` in a separate user.
+  - This script builds and runs the server.
+  - It also listens for `reload` commands being sent through a FIFO, which can be used to make the server rebuild and rerun.
+- The `reload` command is sent by the `deploy.bash` script which runs on my own machine rather than the server.
+  - This script causes a `git pull` and a `reload` command to be run.
+
+This is more or less the same setup as <https://liquidex.house>.

admin/daemon.bash

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+#!/usr/bin/env bash
+
+source "${BASH_SOURCE%/*}/daemon/common.bash"
+
+echo "PATH: $PATH"
+
+trap 'trap - SIGTERM && kill 0' SIGTERM SIGINT EXIT
+
+rm -f $reload_fifo
+mkfifo $reload_fifo
+
+reload() {
+    # This just kind of assumes recompilation doesn't take too long.
+    kill "$rkgk_pid"
+    cargo run --release -- serve --port 8083 > "$build_log" 2>&1 &
+    rkgk_pid="$!"
+}
+
+reload
+
+while true; do
+    read command < "$reload_fifo"
+    case "$command" in
+        reload)
+            echo "Reloading"
+            reload;;
+    esac
+done

admin/daemon/common.bash

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+#!/usr/bin/env bash
+
+reload_fifo="/tmp/rkgk_reload.fifo"
+build_log="/tmp/rkgk_build.log"

admin/daemon/deploy.bash

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+#!/usr/bin/env bash
+
+cd ~/repo
+
+source "${BASH_SOURCE%/*}/common.bash"
+
+git pull
+bash "${BASH_SOURCE%/*}/reload.bash"
+
+echo "^C to exit build log ($build_log)"
+tail --retry -f "$build_log"

admin/daemon/reload.bash

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+#!/usr/bin/env bash
+
+source "${BASH_SOURCE%/*}/common.bash"
+
+echo "Reloading"
+echo "reload" > "$reload_fifo"

admin/deploy.bash

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+#!/usr/bin/env bash
+
+ssh "$RKGK_SERVER" -p "$RKGK_SERVER_PORT" "bash" "~/repo/admin/daemon/deploy.bash"