forked from midou/invidious
111 lines
3.1 KiB
Crystal
111 lines
3.1 KiB
Crystal
module Sentry
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FILE_TIMESTAMPS = {} of String => String # {file => timestamp}
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class ProcessRunner
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getter app_process : (Nil | Process) = nil
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property process_name : String
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property should_build = true
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property files = [] of String
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def initialize(
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@process_name : String,
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@build_command : String,
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@run_command : String,
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@build_args : Array(String) = [] of String,
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@run_args : Array(String) = [] of String,
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files = [] of String,
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should_build = true
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)
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@files = files
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@should_build = should_build
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@should_kill = false
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@app_built = false
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end
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private def build_app_process
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puts "🤖 compiling #{process_name}..."
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build_args = @build_args
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if build_args.size > 0
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Process.run(@build_command, build_args, shell: true, output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
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else
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Process.run(@build_command, shell: true, output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
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end
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end
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private def create_app_process
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app_process = @app_process
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if app_process.is_a? Process
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unless app_process.terminated?
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puts "🤖 killing #{process_name}..."
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app_process.kill
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end
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end
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puts "🤖 starting #{process_name}..."
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run_args = @run_args
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if run_args.size > 0
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@app_process = Process.new(@run_command, run_args, output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
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else
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@app_process = Process.new(@run_command, output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
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end
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end
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private def get_timestamp(file : String)
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File.stat(file).mtime.to_s("%Y%m%d%H%M%S")
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end
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# Compiles and starts the application
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#
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def start_app
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return create_app_process unless @should_build
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build_result = build_app_process()
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if build_result && build_result.success?
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@app_built = true
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create_app_process()
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elsif !@app_built # if build fails on first time compiling, then exit
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puts "🤖 Compile time errors detected. SentryBot shutting down..."
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exit 1
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end
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end
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# Scans all of the `@files`
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#
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def scan_files
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file_changed = false
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app_process = @app_process
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files = @files
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Dir.glob(files) do |file|
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timestamp = get_timestamp(file)
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if FILE_TIMESTAMPS[file]? && FILE_TIMESTAMPS[file] != timestamp
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FILE_TIMESTAMPS[file] = timestamp
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file_changed = true
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puts "🤖 #{file}"
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elsif FILE_TIMESTAMPS[file]?.nil?
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puts "🤖 watching file: #{file}"
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FILE_TIMESTAMPS[file] = timestamp
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file_changed = true if (app_process && !app_process.terminated?)
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end
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end
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start_app() if (file_changed || app_process.nil?)
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end
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def run
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puts "🤖 Your SentryBot is vigilant. beep-boop..."
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loop do
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if @should_kill
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puts "🤖 Powering down your SentryBot..."
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break
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end
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scan_files
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sleep 1
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end
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end
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def kill
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@should_kill = true
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end
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end
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end
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