Class: Everywhere::Commands::Logs

Inherits:
Dry::CLI::Command
  • Object
show all
Defined in:
lib/everywhere/commands/logs.rb

Overview

Tail the native shell's logs. iOS only so far: the Simulator's unified log, scoped to the shell process. Watches (log stream) by default; --last replays recent history (log show) and exits.

Constant Summary collapse

PREDICATE =

The template contract fixes the product name (App.app), so the shell's process on the Simulator is always "App" — one predicate covers every Everywhere app without knowing which one is installed. Scoping to the process alone still yields ~100k lines/half hour of Apple-framework chatter (WebKit resource loads, activities); the default predicate keeps what a shell developer logs — NSLog (Foundation sender, no subsystem), Hotwire Native's subsystem, UIKit warnings — and drops the rest. --verbose falls back to the whole process.

'process == "App" AND eventType == logEvent AND NOT subsystem BEGINSWITH "com.apple"'
VERBOSE_PREDICATE = 
'process == "App"'

Instance Method Summary collapse

Instance Method Details

#argv(udid, last: nil, verbose: false) ⇒ Object

simctl spawn runs the log tool inside the Simulator runtime — the supported way to read a Simulator's unified log from the host. log show spells verbosity --info/--debug where log stream takes --level.



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# File 'lib/everywhere/commands/logs.rb', line 45

def argv(udid, last: nil, verbose: false)
  argv = ["xcrun", "simctl", "spawn", udid, "log"]
  argv += if last
            ["show", "--last", last, *(verbose ? ["--info", "--debug"] : [])]
          else
            ["stream", *(verbose ? ["--level", "debug"] : [])]
          end
  argv + ["--style", "compact", "--predicate", verbose ? VERBOSE_PREDICATE : PREDICATE]
end

#call(ios: false, last: nil, udid: nil, verbose: false) ⇒ Object 



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# File 'lib/everywhere/commands/logs.rb', line 31

def call(ios: false, last: nil, udid: nil, verbose: false, **)
  UI.die!("only the iOS Simulator is supported so far — run: every logs --ios") unless ios

  udid ||= Everywhere::Simulator.booted_udid
  UI.die!("no booted iOS Simulator — start one with `every dev --ios`") unless udid

  UI.step(last ? "iOS Simulator logs from the last #{UI.bold(last)}"
               : "watching iOS Simulator logs #{UI.dim("(Ctrl-C to stop)")}")
  exec(*argv(udid, last: last, verbose: verbose))
end