Get the latest Router nightly builds for a branch (like `dev`)

get_lastest_nightly.sh

#!/usr/bin/env bash

# Requires a PERSONAL CircleCI token defined in the environment
# as CIRCLE_TOKEN from https://app.circleci.com/settings/user/tokens.

branch_to_get="${1:-dev}"
repo_to_use="${2:-router}"
echo "Downloading the latest nightly build from the ${branch_to_get} branch on ${repo_to_use}.  Pass the first argument as a branch name to change the branch and optionally the repo name as the second argument."

curl --request GET \
  --url "https://circleci.com/api/v2/project/gh/apollographql/${repo_to_use}/pipeline?branch=${branch_to_get}" \
  --header "Circle-Token: $CIRCLE_TOKEN" |
    jq -rc '.items[] | select(.trigger.type == "api") | "https://circleci.com/api/v2/pipeline/\(.id)/workflow"' |
      xargs -n1 curl --silent --header "Circle-Token: $CIRCLE_TOKEN" |
        jq -src 'map(.items[]) | map(select((.name == "nightly") and (.status == "success"))) | first | "https://circleci.com/api/v2/workflow/\(.id)/job"' |
          xargs -n1 curl --silent --header "Circle-Token: $CIRCLE_TOKEN" |
            jq --arg REPO "$repo_to_use" -rc '.items[] | "https://circleci.com/api/v2/project/gh/apollographql/\($REPO)/\(.job_number)/artifacts/"' |
              xargs -n1 curl --location --silent --header "Circle-Token: $CIRCLE_TOKEN" |
                jq -sr 'map(.items[]) | .[] | .url' |
                  xargs -n1 curl -O --location --retry 10 --retry-max-time 0 -C - --header "Circle-Token: $CIRCLE_TOKEN"