nixpkgs/pkgs/applications/office/mendeley/update.nix

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{ writeScript }:
writeScript "update-mendeley" ''
function follow() {
local URL=$1
while true; do
NEWURL=$(curl -m20 -sI "$URL" -o /dev/null -w '%{redirect_url}')
[ -z "$NEWURL" ] && break
[[ $NEWURL = $URL ]] && (echo "redirect loop?!"; exit 1)
echo "Following $URL -> $NEWURL ..." >&2
URL=$NEWURL
done
echo $URL
}
amd64URL=$(follow https://www.mendeley.com/repositories/ubuntu/stable/amd64/mendeleydesktop-latest)
amd64V=$(basename $amd64URL|grep -m1 -o "[0-9]\+\.[0-9]\+\(\.[0-9]\+\)\?")
i386URL=$(follow https://www.mendeley.com/repositories/ubuntu/stable/i386/mendeleydesktop-latest)
i386V=$(basename $i386URL|grep -m1 -o "[0-9]\+\.[0-9]\+\(\.[0-9]\+\)\?")
echo "amd64 version: $amd64V"
echo "i386 version: $i386V"
if [[ $amd64V != $i386V ]]; then
echo "Versions not the same!"
exit 1
fi
if grep -q -F "$amd64V" ${./default.nix}; then
echo "No new version yet, nothing to do."
echo "Have a nice day!"
exit 0
fi
amd64OldHash=$(nix-instantiate --eval --strict -A "mendeley.src.drvAttrs.outputHash" --argstr system "x86_64-linux"| tr -d '"')
i386OldHash=$(nix-instantiate --eval --strict -A "mendeley.src.drvAttrs.outputHash" --argstr system "i686-linux"| tr -d '"')
echo "Prefetching amd64..."
amd64NewHash=$(nix-prefetch-url $amd64URL)
echo "Prefetching i386..."
i386NewHash=$(nix-prefetch-url $i386URL)
# Don't actually update, just report that an update is available
cat <<EOF
Time to update to $amd64V !
32bit (i386):
Old: $i386OldHash
New: $i386NewHash
64bit (amd64):
Old: $amd64OldHash
New: $amd64NewHash
Exiting so this information is seen...
(no update is actually performed here)
EOF
exit 1
''