tjh.dev
1#!/usr/bin/env nix-shell
2#! nix-shell -i bash -p curl jq git gnused gnugrep
3
4
5# executing this script without arguments will
6# - find the newest stable plex-desktop version avaiable on snapcraft (https://snapcraft.io/plex-desktop)
7# - read the current plex-desktop version from the current nix expression
8# - update the nix expression if the versions differ
9# - try to build the updated version, exit if that fails
10# - give instructions for upstreaming
11
12# As an optional argument you can specify the snapcraft channel to update to.
13# Default is `stable` and only stable updates should be pushed to nixpkgs. For
14# testing you may specify `candidate` or `edge`.
15
16
17channel="${1:-stable}" # stable/candidate/edge
18nixpkgs="$(git rev-parse --show-toplevel)"
19plex_nix="$nixpkgs/pkgs/by-name/pl/plex-desktop/package.nix"
20
21
22#
23# find the newest stable plex-desktop version avaiable on snapcraft
24#
25
26# create bash array from snap info
27snap_info=($(
28 curl -s -H 'X-Ubuntu-Series: 16' \
29 "https://api.snapcraft.io/api/v1/snaps/details/plex-desktop?channel=$channel" \
30 | jq --raw-output \
31 '.revision,.download_sha512,.version,.last_updated'
32))
33
34# "revision" is the actual version identifier on snapcraft, the "version" is
35# just for human consumption. Revision is just an integer that gets increased
36# by one every (stable or unstable) release.
37revision="${snap_info[0]}"
38# We need to escape the slashes
39hash="$(nix-hash --to-sri --type sha512 ${snap_info[1]} | sed 's|/|\\/|g')"
40upstream_version="${snap_info[2]}"
41last_updated="${snap_info[3]}"
42echo "Latest $channel release is $upstream_version from $last_updated."
43#
44# read the current plex-desktop version from the currently *committed* nix expression
45#
46
47current_version=$(
48 grep 'version\s*=' "$plex_nix" \
49 | sed -Ene 's/.*"(.*)".*/\1/p'
50)
51
52echo "Current version: $current_version"
53
54#
55# update the nix expression if the versions differ
56#
57
58if [[ "$current_version" == "$upstream_version" ]]; then
59 echo "Plex is already up-to-date"
60 exit 0
61fi
62
63echo "Updating from ${current_version} to ${upstream_version}, released on ${last_updated}"
64
65# search-and-replace revision, hash and version
66sed --regexp-extended \
67 -e 's/rev\s*=\s*"[0-9]+"\s*;/rev = "'"${revision}"'";/' \
68 -e 's/hash\s*=\s*"[^"]*"\s*;/hash = "'"${hash}"'";/' \
69 -e 's/version\s*=\s*".*"\s*;/version = "'"${upstream_version}"'";/' \
70 -i "$plex_nix"
71