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ryanfb/wait_for_deploy.rb

Created July 9, 2021 14:24
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Run from a Git repository with a properly configured Rapporteur (https://github.com/envylabs/rapporteur) status endpoint as the first argument, this script will wait until the live revision matches the latest local revision
Raw
wait_for_deploy.rb
#!/usr/bin/env ruby
require 'json'
require 'shellwords'
unless ARGV.length == 1
$stderr.puts "Usage: wait_for_deploy.rb https://example.com/status.json"
exit 1
end
live_commit = nil
last_commit = `git rev-parse HEAD`.chomp
unless $?.success?
$stderr.puts "Unable to fetch latest local git commit"
exit 1
end
$stderr.puts "Latest commit: #{last_commit}"
until live_commit == last_commit do
sleep 1 unless live_commit.nil?
json_body = `curl -s --fail #{Shellwords.escape(ARGV[0])}`
unless $?.success?
$stderr.puts "Unable to fetch status JSON"
exit 1
end
status = JSON.parse(json_body)
$stderr.puts "Revision at start: #{status['revision']}" if live_commit.nil?
live_commit = status['revision'].chomp
end
$stderr.puts "Current revision matches: #{live_commit}"
exit 0
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