Side-load Signal instead of using the Google Play Store.

sideload-signal.sh

# USAGE:

# cd /path/to/sideload-signal.sh
# chmod +x sideload-signal.sh
# ./sideload-signal.sh

# DEPENDENCIES:

# * Android Debug Bridge
#   (install with: `sudo apt install adb`)
# * USB connection to android device in with "USB debugging" enabled
#   (see http://bit.ly/2p89Oxt)

# remember where we started!
pushd `pwd`

# go somewhere we don't care about
mkdir ~/tmp
cd ~/tmp

# store version as variable for easier updating
version = 4.11.5

# download the apk
curl -O https://updates.signal.org/android/Signal-website-release-${version}.apk

# TODO: implement signature verification w/ some combination of:
# curl https://signal.org/android/apk/ | grep -A 2 "<span class=\"fingerprint\">" | tail -n 2
# unzip -p Signal-website-release-4.5.3.apk META-INF/CERT.RSA  | keytool  -printcert
# h/t @aepyornis

# check adb 
adb devices

# install signal
adb install Signal-website-release-${version}.apk

# clean up
rm Signal-website-release-${version}.apk

# go back to where we came from!
popd

@aepyornis

(don't know how to make collaborators on gists... is that a thing?)