refactoring, more config, packaging

package/debian/veilid-server/DEBIAN/postinst

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+set -e
+
+# Add veilid user and group
+adduser --system --group veilid &>/dev/null || true
+
+# Make db folders
+mkdir -p /var/db/veilid-server/protected_store
+mkdir -p /var/db/veilid-server/table_store
+mkdir -p /var/db/veilid-server/block_store
+
+# Set permissions
+chown -R veilid:veilid /var/db/veilid-server
+chmod 0750 /var/db/veilid-server/protected_store
+chmod 0750 /var/db/veilid-server/table_store
+chmod 0750 /var/db/veilid-server/block_store
+chmod 0750 /var/db/veilid-server
+
+chmod 755 /usr/bin/veilid-server
+
+# Add and start systemd unit
+if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
+    # This will only remove masks created by d-s-h on package removal.
+    deb-systemd-helper unmask 'veilid-server.service' >/dev/null || true
+
+    # was-enabled defaults to true, so new installations run enable.
+    if deb-systemd-helper --quiet was-enabled 'veilid-server.service'; then
+        # Enables the unit on first installation, creates new
+        # symlinks on upgrades if the unit file has changed.
+        deb-systemd-helper enable 'veilid-server.service' >/dev/null || true
+    else
+        # Update the statefile to add new symlinks (if any), which need to be
+        # cleaned up on purge. Also remove old symlinks.
+        deb-systemd-helper update-state 'veilid-server.service' >/dev/null || true
+    fi
+
+    if [ -d /run/systemd/system ]; then
+        systemctl --system daemon-reload >/dev/null || true
+        if [ -n "$2" ]; then
+            _dh_action=restart
+        else
+            _dh_action=start
+        fi
+        deb-systemd-invoke $_dh_action 'veilid-server.service' >/dev/null || true
+    fi
+fi