nitter: add update script

pkgs/servers/nitter/update.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p common-updater-scripts curl jq nix nix-prefetch-git patchutils
+set -euo pipefail
+
+info() {
+    if [ -t 2 ]; then
+        set -- '\033[32m%s\033[39m\n' "$@"
+    else
+        set -- '%s\n' "$@"
+    fi
+    printf "$@" >&2
+}
+
+nitter_old_version=$(nix-instantiate --eval --strict --json -A nitter.version . | jq -r .)
+nitter_old_rev=$(nix-instantiate --eval --strict --json -A nitter.src.rev . | jq -r .)
+today=$(LANG=C date -u +'%Y-%m-%d')
+
+# 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
+commit=$(curl -Sfs "https://api.github.com/repos/zedeus/nitter/compare/$nitter_old_rev~1...master" \
+    | jq '.commits | map(select(.commit.committer.date < $today) | {sha, date: .commit.committer.date}) | .[-1]' --arg today "$today")
+nitter_new_rev=$(jq -r '.sha' <<< "$commit")
+nitter_new_version="unstable-$(jq -r '.date[0:10]' <<< "$commit")"
+info "latest commit before $today: $nitter_new_rev ($(jq -r '.date' <<< "$commit"))"
+
+if [ "$nitter_new_rev" = "$nitter_old_rev" ]; then
+    info "nitter is up-to-date."
+    exit
+fi
+
+if curl -Sfs "https://github.com/zedeus/nitter/compare/$nitter_old_rev...$nitter_new_rev.patch" \
+| lsdiff | grep -Fxe 'a/nitter.nimble' -e 'b/nitter.nimble' > /dev/null; then
+    info "nitter.nimble changed, some dependencies probably need updating."
+fi
+
+nitter_new_sha256=$(nix-prefetch-git --rev "$nitter_new_rev" "https://github.com/zedeus/nitter.git" | jq -r .sha256)
+update-source-version nitter "$nitter_new_version" "$nitter_new_sha256" --rev="$nitter_new_rev"
+git commit --all --verbose --message "nitter: $nitter_old_version -> $nitter_new_version"
+info "Updated nitter to $nitter_new_version."