Add File.atomic_write to extend/
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@ -1,3 +1,4 @@
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# typed: strict
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# frozen_string_literal: true
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require "fileutils"
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@ -18,7 +19,14 @@ class File
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# File.atomic_write('/data/something.important', '/data/tmp') do |file|
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# file.write('hello')
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# end
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def self.atomic_write(file_name, temp_dir = dirname(file_name))
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sig {
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params(
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file_name: T.any(Pathname, String),
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temp_dir: String,
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_block: T.proc.params(arg0: Tempfile).void,
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).void
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}
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def self.atomic_write(file_name, temp_dir = dirname(file_name), &_block)
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require "tempfile" unless defined?(Tempfile)
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Tempfile.open(".#{basename(file_name)}", temp_dir) do |temp_file|
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@ -38,32 +46,35 @@ class File
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if old_stat
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# Set correct permissions on new file
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begin
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chown(old_stat.uid, old_stat.gid, temp_file.path)
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chown(old_stat.uid, old_stat.gid, T.must(temp_file.path))
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# This operation will affect filesystem ACL's
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chmod(old_stat.mode, temp_file.path)
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chmod(old_stat.mode, T.must(temp_file.path))
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rescue Errno::EPERM, Errno::EACCES
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# Changing file ownership failed, moving on.
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end
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end
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# Overwrite original file with temp file
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rename(temp_file.path, file_name)
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rename(T.must(temp_file.path), file_name)
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return_val
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end
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end
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# Private utility method.
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def self.probe_stat_in(dir) #:nodoc:
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sig { params(dir: String).returns(T.nilable(File::Stat)) }
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private_class_method def self.probe_stat_in(dir) # :nodoc:
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basename = [
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".permissions_check",
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Thread.current.object_id,
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Process.pid,
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rand(1000000)
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rand(1_000_000),
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].join(".")
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file_name = join(dir, basename)
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FileUtils.touch(file_name)
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stat(file_name)
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rescue Errno::ENOENT
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file_name = nil
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ensure
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FileUtils.rm_f(file_name) if file_name
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end
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@ -4,6 +4,7 @@
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require "context"
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require "resource"
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require "metafiles"
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require "extend/file/atomic"
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module DiskUsageExtension
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sig { returns(Integer) }
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@ -10,7 +10,6 @@ require "json/add/exception"
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require "forwardable"
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require "set"
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require "active_support/core_ext/file/atomic"
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require "active_support/core_ext/hash/deep_merge"
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require "active_support/core_ext/hash/keys"
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@ -1,7 +1,7 @@
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# typed: true
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# frozen_string_literal: true
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require "active_support/core_ext/array/access"
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require "extend/array"
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require "rubocops/shared/helper_functions"
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require "shellwords"
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