Class: Dash::Dockerfile::Rules::UncachedInstall

Inherits:
Base
  • Object
show all
Defined in:
lib/dash/dockerfile/rules/uncached_install.rb

Overview

Measured only: a dependency install that missed the cache and cost real time, where no broad copy above it explains why. Something else invalidated the layer, and the operator is the only one who can say what.

Constant Summary collapse

THRESHOLD_SECONDS = 
10
SUGGESTION = 
"check what changed above it — a COPY, an ARG, or a base image that moved"

Instance Method Summary collapse

Instance Method Details

#findings ⇒ Object 



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# File 'lib/dash/dockerfile/rules/uncached_install.rb', line 8

def findings
  return [] unless build

  document.instructions.filter_map do |instruction|
    next unless context.dependency_install?(instruction) && !context.busted_by_broad_copy?(instruction)

    step = context.build_step_for(instruction)
    next if step.nil? || step.cached || step.seconds.to_f <= THRESHOLD_SECONDS

    note at(instruction), format("`%s` ran %.1fs uncached", context.install_command(instruction), step.seconds), SUGGESTION
  end
end