package scripts for DEBIAN

DEBIAN/control

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+Package: signal-cli
+Version: 0.9.0
+Architecture: armhf
+Depends: default-jre-headless, dbus, adduser
+Maintainer: adimarantis@gmail.com
+Description: Command line interface for the Signal Messenger
+

DEBIAN/postinst

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+#!/bin/sh
+
+set -e
+
+if [ "$1" != "configure" ]; then
+    exit 0
+fi
+
+# Touch and set permisions of files
+if [ -z "$2" ]; then
+    if [ -d /var/lib/signal-cli ]; then
+		chown signal-cli:signal-cli /var/lib/signal-cli
+	fi
+	
+	if [ -d /opt/signal ]; then
+		chown -R signal-cli:signal-cli /opt/signal
+	fi
+	systemctl daemon-reload
+	systemctl enable signal.service
+	systemctl reload dbus.service
+	service signal start
+fi
+
+exit 0

DEBIAN/preinst

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+#! /bin/sh
+# preinst script for signal-cli
+
+set -e
+
+addsignaluser() {
+    # creating signal-cli group if he isn't already there
+    if ! getent group signal-cli >/dev/null; then
+        addgroup --system signal-cli >/dev/null
+    fi
+
+    # creating signal-cli user if he isn't already there
+    if ! getent passwd signal-cli >/dev/null; then
+        adduser \
+          --system \
+          --disabled-login \
+          --ingroup signal-cli \
+          --no-create-home \
+          --home /nonexistent \
+          --gecos "signal-cli user" \
+          --shell /bin/false \
+          nginx  >/dev/null
+    fi
+}
+
+case "$1" in
+    install)
+        addsignaluser
+        ;;
+    upgrade)
+        addsignaluser
+        ;;
+
+    abort-upgrade)
+        ;;
+
+    *)
+        echo "preinst called with unknown argument \`$1'" >&2
+        exit 0
+        ;;
+esac
+
+
+
+exit 0

DEBIAN/prerm

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+#!/bin/sh
+
+set -e
+
+case "$1" in
+    remove|deconfigure|remove-in-favour|deconfigure-in-favour)
+		service signal stop
+        ;;
+    upgrade|failed-upgrade)
+        ;;
+    *)
+        echo "prerm called with unknown argument \`$1'" >&2
+        ;;
+esac
+
+
+
+exit 0