invidious: add update script

based on mpvScripts.sponsorblock's update script

pkgs/servers/invidious/default.nix

@@ -88,7 +88,11 @@ crystal.buildCrystalPackage rec {
     INVIDIOUS_CONFIG="database_url: sqlite3:///dev/null" $out/bin/invidious --help
   '';
 
-  passthru.tests = { inherit (nixosTests) invidious; };
+  passthru = {
+    inherit lsquic;
+    tests = { inherit (nixosTests) invidious; };
+    updateScript = ./update.sh;
+  };
 
   meta = with lib; {
     description = "An open source alternative front-end to YouTube";

pkgs/servers/invidious/update.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p common-updater-scripts curl crystal2nix jq git gnused nix nix-prefetch-git nix-update
+git_url='https://github.com/iv-org/invidious.git'
+git_branch='master'
+git_dir='/var/tmp/invidious.git'
+nix_file="$(dirname "${BASH_SOURCE[0]}")/default.nix"
+pkg='invidious'
+
+set -euo pipefail
+
+info() {
+    if [ -t 2 ]; then
+        set -- '\033[32m%s\033[39m\n' "$@"
+    else
+        set -- '%s\n' "$@"
+    fi
+    printf "$@" >&2
+}
+
+old_rev=$(nix-instantiate --eval --strict --json -A "$pkg.src.rev" | jq -r)
+old_version=$(nix-instantiate --eval --strict --json -A "$pkg.version" | jq -r)
+today=$(LANG=C date -u +'%Y-%m-%d')
+
+info "fetching $git_url..."
+if [ ! -d "$git_dir" ]; then
+    git init --initial-branch="$git_branch" "$git_dir"
+    git -C "$git_dir" remote add origin "$git_url"
+fi
+git -C "$git_dir" fetch origin "$git_branch"
+
+# use latest commit before today, we should not call the version *today*
+# because there might still be commits coming
+# use the day of the latest commit we picked as version
+new_rev=$(git -C "$git_dir" log -n 1 --format='format:%H' --before="${today}T00:00:00Z" "origin/$git_branch")
+new_version="unstable-$(git -C "$git_dir" log -n 1 --format='format:%cs' "$new_rev")"
+info "latest commit before $today: $new_rev"
+
+if [ "$new_rev" = "$old_rev" ]; then
+    info "$pkg is up-to-date."
+    exit
+fi
+
+new_sha256=$(nix-prefetch-git --rev "$new_rev" "$git_dir" | jq -r .sha256)
+update-source-version "$pkg" \
+    "$new_version" \
+    "$new_sha256" \
+    --rev="$new_rev"
+git add "$nix_file"
+commit_msg="$pkg: $old_version -> $new_version"
+
+cd "${nix_file%/*}"
+if git -C "$git_dir" diff-tree --quiet "${old_rev}..${new_rev}" -- 'shard.lock'; then
+    info "shard.lock did not change since $old_rev."
+else
+    info "Updating shards.nix..."
+    git -C "$git_dir" reset --hard "$new_rev"
+    crystal2nix -- "$git_dir/shard.lock"  # argv's index seems broken
+    git add 'shards.nix'
+
+    lsquic_old_version=$(nix-instantiate --eval --strict --json -A "${pkg}.lsquic.version" '../../..' | jq -r)
+    lsquic_new_version=$(nix eval --raw -f 'shards.nix' lsquic.rev \
+        | sed -e 's/^v//' -e 's/-[0-9]*$//')
+    if [ "$lsquic_old_version" != "$lsquic_new_version" ]; then
+        info "Updating lsquic to $lsquic_new_version..."
+        nix-update --version "$lsquic_new_version" -f '../../..' invidious.lsquic
+        if git diff-index --quiet HEAD -- 'lsquic.nix'; then
+            info "lsquic is up-to-date."
+        else
+            boringssl_new_version=$(curl -LSsf "https://github.com/litespeedtech/lsquic/raw/v${lsquic_new_version}/README.md" \
+                | grep -Pom1 '(?<=^git checkout ).*')
+            boringssl_new_sha256=$(nix-prefetch-git --rev "$boringssl_new_version" 'https://boringssl.googlesource.com/boringssl' \
+                | jq -r .sha256)
+            sed -e "0,/^ *version = .*/ s//    version = \"$boringssl_new_version\";/" \
+                -e "0,/^ *sha256 = .*/ s//      sha256 = \"$boringssl_new_sha256\";/" \
+                -i lsquic.nix
+            git add 'lsquic.nix'
+            commit_msg="$commit_msg
+
+lsquic: $lsquic_old_version -> $lsquic_new_version"
+        fi
+    fi
+fi
+
+git commit --verbose --message "$commit_msg"