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nixpkgs/pkgs/servers/web-apps/lemmy/update.sh

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#!/usr/bin/env nix-shell
#! nix-shell -i oil -p jq sd nix-prefetch-github ripgrep moreutils
# TODO set to `verbose` or `extdebug` once implemented in oil
shopt --set xtrace
var directory = $(dirname $0 | xargs realpath)
var owner = "LemmyNet"
var ui_repo = "lemmy-ui"
var server_repo = "lemmy"
var latest_rev = $(curl -q https://api.github.com/repos/${owner}/${server_repo}/releases/latest | \
jq -r '.tag_name')
var latest_version = $(echo $latest_rev)
var current_version = $(jq -r '.version' $directory/pin.json)
if ($latest_version === $current_version) {
echo "lemmy is already up-to-date"
return 0
} else {
var server_tarball_meta = $(nix-prefetch-github $owner $server_repo --rev "$latest_rev")
var server_tarball_hash = "sha256-$(echo $server_tarball_meta | jq -r '.sha256')"
var ui_tarball_meta = $(nix-prefetch-github $owner $ui_repo --rev "$latest_rev")
var ui_tarball_hash = "sha256-$(echo $ui_tarball_meta | jq -r '.sha256')"
jq ".version = \"$latest_version\" | \
.\"serverSha256\" = \"$server_tarball_hash\" | \
.\"uiSha256\" = \"$ui_tarball_hash\" | \
.\"serverCargoSha256\" = \"\" | \
.\"uiYarnDepsSha256\" = \"\"" $directory/pin.json | sponge $directory/pin.json
var new_cargo_sha256 = $(nix-build -A lemmy-server 2>&1 | \
tail -n 2 | \
head -n 1 | \
sd '\s+got:\s+' '')
var new_offline_cache_sha256 = $(nix-build -A lemmy-ui 2>&1 | \
tail -n 2 | \
head -n 1 | \
sd '\s+got:\s+' '')
jq ".\"serverCargoSha256\" = \"$new_cargo_sha256\" | \
.\"uiYarnDepsSha256\" = \"$new_offline_cache_sha256\"" \
$directory/pin.json | sponge $directory/pin.json
}