Convert Redis Desktop Manger's Snap into an AppImage

make-rdm-app-image.sh

#/bin/bash -e

# This coverts Redis Desktop Manager's Snap into an AppImage.
# Inspired by https://github.com/AppImage/AppImageKit/issues/166
# Tested on Linux Mint 18 / Ubuntu Xenial

if ! [ -x "$(command -v unsquashfs)" ]; then
  echo 'Error: squashfs-tools is not installed.' >&2
  exit 1
fi

# This is 2019.5-c57dd5f. Chech for newer or other arch with:
# curl -H 'Snap-Device-Series: 16' http://api.snapcraft.io/v2/snaps/info/redis-desktop-manager 
URL=https://api.snapcraft.io/api/v1/snaps/download/Iw3a6EauULwaud5DO0ixtrJg8o6VXaey_335.snap
wget -O rdm.snap $URL

unsquashfs -d appdir rdm.snap

cp appdir/usr/share/applications/rdm.desktop appdir/rdm.desktop
sed -i 's|Icon=${SNAP}/usr/share/pixmaps/rdm.png|Icon=/usr/share/pixmaps/rdm|' appdir/rdm.desktop

cp appdir/command-rdm.wrapper appdir/AppRun
sed -i '/#!\/bin\/sh/r'<(
  echo 'export SNAP="$APPDIR"'
  echo 'export SNAP_ARCH="amd64"'
  echo 'export SNAP_USER_COMMON="$HOME/.config/rdm"'
) appdir/AppRun
sed -i 's/exec "desktop-launch"/exec/' appdir/AppRun

wget "https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage"
chmod a+x appimagetool-x86_64.AppImage

./appimagetool-x86_64.AppImage appdir

rm -rf appdir rdm.snap appimagetool-x86_64.AppImage

No longer needed because RDM is now on Flathub: https://flathub.org/apps/details/dev.rdm.RDM