Class: Mktemp

Inherits:
Object show all
Includes:
FileUtils
Defined in:
mktemp.rb

Overview

Performs Formula#mktemp’s functionality, and tracks the results. Each instance is only intended to be used once.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(prefix, opts = {}) ⇒ Mktemp

Returns a new instance of Mktemp.



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# File 'mktemp.rb', line 12

def initialize(prefix, opts = {})
  @prefix = prefix
  @retain_in_cache = opts[:retain_in_cache]
  @retain = opts[:retain] || @retain_in_cache
  @quiet = false
end

Instance Attribute Details

#tmpdir ⇒ Object (readonly)

Path to the tmpdir used in this run, as a Pathname.



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# File 'mktemp.rb', line 10

def tmpdir
  @tmpdir
end

Instance Method Details

#quiet! ⇒ void

This method returns an undefined value.

Instructs this Mktemp to not emit messages when retention is triggered.



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# File 'mktemp.rb', line 37

def quiet!
  @quiet = true
end

#retain! ⇒ void

This method returns an undefined value.

Instructs this Mktemp to retain the staged files.



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# File 'mktemp.rb', line 21

def retain!
  @retain = true
end

#retain? ⇒ Boolean

True if the staged temporary files should be retained.

Returns:

  • (Boolean) 


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# File 'mktemp.rb', line 26

def retain?
  @retain
end

#retain_in_cache? ⇒ Boolean

True if the source files should be retained.

Returns:

  • (Boolean) 


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# File 'mktemp.rb', line 31

def retain_in_cache?
  @retain_in_cache
end

#run ⇒ Object 



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# File 'mktemp.rb', line 46

def run
  prefix_name = @prefix.tr "@", "AT"
  @tmpdir = if retain_in_cache?
    tmp_dir = HOMEBREW_CACHE/"Sources/#{prefix_name}"
    chmod_rm_rf(tmp_dir) # clear out previous staging directory
    tmp_dir.mkpath
    tmp_dir
  else
    Pathname.new(Dir.mktmpdir("#{prefix_name}-", HOMEBREW_TEMP))
  end

  # Make sure files inside the temporary directory have the same group as the
  # brew instance.
  #
  # Reference from `man 2 open`
  # > When a new file is created, it is given the group of the directory which
  # contains it.
  group_id = if HOMEBREW_BREW_FILE.grpowned?
    HOMEBREW_BREW_FILE.stat.gid
  else
    Process.gid
  end
  begin
    chown(nil, group_id, @tmpdir)
  rescue Errno::EPERM
    opoo "Failed setting group \"#{T.must(Etc.getgrgid(group_id)).name}\" on #{@tmpdir}"
  end

  begin
    Dir.chdir(tmpdir) { yield self }
  ensure
    ignore_interrupts { chmod_rm_rf(@tmpdir) } unless retain?
  end
ensure
  if retain? && @tmpdir.present? && !@quiet
    message = retain_in_cache? ? "Source files for debugging available at:" : "Temporary files retained at:"
    ohai message, @tmpdir.to_s
  end
end

#to_s ⇒ String

Returns:



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# File 'mktemp.rb', line 42

def to_s
  "[Mktemp: #{tmpdir} retain=#{@retain} quiet=#{@quiet}]"
end