Class: Fontico::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/fontico/builder.rb

Overview

Resolve -> preprocess -> lock -> emit. Everything the rake task does.

Defined Under Namespace

Classes: Report

Constant Summary collapse

PENDING =

Declared in manifests, emitter not landed yet. Skipped with a notice so the manifest can state intent without breaking the build.

%w[woff2].freeze

Instance Method Summary collapse

Constructor Details

#initialize(manifest, root: Dir.pwd, output: "app/assets/builds", offline: false, force: false) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/fontico/builder.rb', line 15

def initialize(manifest, root: Dir.pwd, output: "app/assets/builds",
               offline: false, force: false)
  @manifest = manifest
  @root = root
  @output = File.join(root, output)
  @offline = offline
  @force = force
  @lock = Lockfile.new(File.join(root, "icons.lock"))
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/fontico/builder.rb', line 25

def call
  warnings = Hash.new { |h, k| h[k] = [] }
  cached, fetched = [], []
  missing = {}

  # The lock caches Iconify bodies so deploys run offline. Local files
  # are already on disk: treating them as fresh meant editing logo.svg
  # rebuilt nothing. Force is `rake fontico:update` — re-fetch remotes,
  # keep the append-only codepoints.
  stale = @manifest.icons.select { _1.local? || @force || !@lock.fresh?(_1.name, _1.source) }
  cached = @manifest.icons.map(&:name) - stale.map(&:name)

  unless stale.empty?
    remote_stale = stale.reject(&:local?)
    # Local files do not need the network. Offline is a hard fail only
    # when a remote body has to come off the wire — which under force is
    # every remote, lock or no lock. Saying "missing" there would be a
    # lie: the bodies are present, force is what made them stale.
    if @offline && remote_stale.any?
      reason = @force ? "re-fetch #{remote_stale.size} icon(s)" : "resolve #{remote_stale.size} icon(s) missing from icons.lock"
      raise Error, "cannot #{reason} and --offline was given"
    end

    resolver = Resolver.new(@manifest, root: @root)
    sources = resolver.call(only: stale.map(&:name))
    missing = resolver.missing
    stale.each do |icon|
      src = sources[icon.name]
      # Named in #missing already, and reported by the caller. It keeps
      # its codepoint and whatever the lock still holds, so fixing the
      # manifest entry is all it takes to bring it back.
      next if src.nil?

      pre = Preprocessor.new(icon, size: @manifest.size)
                        .call(src.markup, width: src.width, height: src.height)
      # Locals are re-read every build, so "stale" does not mean changed.
      # Compare the stored digest to keep an untouched logo.svg counted as
      # cached rather than reported as a fetch that never happened. A
      # remote is judged by the wire, not the digest: under force it was
      # genuinely re-fetched even when it came back byte-identical.
      before = @lock.entry(icon.name)&.fetch("digest", nil)
      @lock.store(icon.name, source: icon.source, body: pre.body,
                  multicolor: pre.multicolor, warnings: pre.warnings)
      unchanged = icon.local? && @lock.entry(icon.name)["digest"] == before
      (unchanged ? cached : fetched) << icon.name
    end
  end

  # Missing icons stay in the list: their codepoints must not be reissued
  # while the manifest still claims them.
  @lock.retire_missing!(@manifest.icons.map(&:name))
  @lock.save!

  buildable = @manifest.icons.reject { missing.key?(_1.name) }
  buildable.each do |icon|
    found = @lock.warnings(icon.name)
    warnings[icon.name] = found if found.any?
  end

  written, skipped = emit(buildable)
  Report.new(written: written, warnings: warnings, skipped: skipped,
             cached: cached, fetched: fetched, missing: missing,
             pending: @manifest.targets & PENDING)
end