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Description
When a file task depends on some non-file task indirectly,
Rake executes the file task even if its immediate prerequisite files have older timestamp.
It looks like the behavior changed at 12.1.0.
Example
require "rake/clean"
CLEAN.include("config.yml", "component")
task "setup" do
puts Rake::VERSION
touch "config.yml" unless File.exist?("config.yml")
end
file "config.yml" => "setup"
file "component" => "config.yml" do |t|
puts "[config.yml] #{File.mtime(t.prerequisites[0])}"
puts "[component] #{File.exist?(t.name) && File.mtime(t.name)}"
sleep 1
touch t.name
endBased on the above Rakefile, clean up and create the "component" first.
$ rake clean && rake component
The next rake component results in different behavior as follows.
On 12.0.0:
$ rake component --trace
(in /path/to/Rakefile-directory)
** Invoke component (first_time, not_needed)
** Invoke config.yml (first_time)
** Invoke setup (first_time)
** Execute setup
12.0.0
** Execute config.yml
On 12.1.0:
$ rake component --trace
(in /path/to/Rakefile-directory)
** Invoke component (first_time)
** Invoke config.yml (first_time)
** Invoke setup (first_time)
** Execute setup
12.1.0
** Execute config.yml
** Execute component
[config.yml] 2018-01-01 15:13:19 +0900
[component] 2018-01-01 15:13:20 +0900
touch component
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