signalupdate.sh

This script automatically installs or updates the latest signal command line client (--> signal-cli, see https://github.com/AsamK/signal-cli) on a Raspberry with Raspberry Pi OS (Raspian). If a new version of signal-cli has been released, simply run the script again.

What does the script do?

1. check for an existing version, backup if necessary
2. download the latest signal-cli (https://github.com/AsamK/signal-cli)
3. download corresponding library and patch signal-cli installation with it (https://github.com/exquo/libsignal-client)
4. on aarch64 systems only: download corresponding sources for libsqlitejdbc.so, compile and patch signal-cli installation with it (https://github.com/xerial/sqlite-jdbc)

Which files are located where if the script was successful?

• downloaded files, binaries and backups : /usr/local/signal/
• symbolic link : /usr/local/bin/signal-cli

Usage:

simply execute the script file :

sudo bash signalupdate.sh

Requirements:

(no guarantee for completeness)

• RaspberryPi with "armv7(l)" or "aarch64" (only tested on Raspi4B).
• installed package "wget"
• installed package "java-17-openjdk" (as primary or alternative java version, if the primary version of java has to be a different one --> see 'update-alternatives')
• installed package "python"

Example run:

user@system:~/signal_cli_on_raspi $ sudo bash signalupdate.sh 

 -> new client version     : v0.12.2
 -> current client version : v0.12.2
 -> the versions are the same - install anyway ? [y/n]: y
 -> backup old signal directory into '/usr/local/signal/backup_20231007_214922'
 -> downloading new client
 -> required version of the libsignal library (armv7-unknown-linux-gnueabihf) : v0.32.1
 -> patching 'libsignal-client-0.12.2.jar' with customised libsignal library
 -> required version of the sqlite-jdbc library : v3.43.0.0
 -> getting sources
 -> compiling sources (needs about 2 minutes on a Raspi4)
 -> patching 'sqlite-jdbc-3.43.0.0.jar' with compiled sqlite-jdbc library
 -> patching 'signal-cli' with information about the required java version 
 -> creating symbolic link
 -> clean up

 -> process successfully completed, new version : 'signal-cli 0.12.2'