Method: Pod::Lockfile#detect_changes_with_podfile

Defined in:

lib/cocoapods-core/lockfile.rb

#detect_changes_with_podfile(podfile) ⇒ Hash{Symbol=>Array[Strings]}

TODO:

Why do we look for compatibility instead of just comparing if the two dependencies are equal?

Analyzes the Pod::Lockfile and detects any changes applied to the Podfile since the last installation.

For each Pod, it detects one state among the following:

• added: Pods that weren’t present in the Podfile.

• changed: Pods that were present in the Podfile but changed:

  • Pods whose version is not compatible anymore with Podfile,

  • Pods that changed their external options.

• removed: Pods that were removed form the Podfile.

• unchanged: Pods that are still compatible with Podfile.

Parameters:

• podfile (Podfile) —

  the podfile that should be analyzed.

Returns:

• (Hash{Symbol=>Array[Strings]}) —

  a hash where pods are grouped by the state in which they are.

# File 'lib/cocoapods-core/lockfile.rb', line 289

def detect_changes_with_podfile(podfile)
  result = {}
  [:added, :changed, :removed, :unchanged].each { |k| result[k] = [] }

  installed_deps = {}
  dependencies.each do |dep|
    name = dep.root_name
    installed_deps[name] ||= dependencies_to_lock_pod_named(name)
  end

  installed_deps = installed_deps.values.flatten(1).group_by(&:name)

  podfile_dependencies = podfile.dependencies
  podfile_dependencies_by_name = podfile_dependencies.group_by(&:name)

  all_dep_names = (dependencies + podfile_dependencies).map(&:name).uniq
  all_dep_names.each do |name|
    installed_dep   = installed_deps[name]
    installed_dep &&= installed_dep.first
    podfile_dep     = podfile_dependencies_by_name[name]
    podfile_dep   &&= podfile_dep.first

    if installed_dep.nil?  then key = :added
    elsif podfile_dep.nil? then key = :removed
    elsif podfile_dep.compatible?(installed_dep) then key = :unchanged
    else key = :changed
    end
    result[key] << name
  end
  result
end