Currently in my code when I want to create a pathname object and create a path at the same time I must use tap
```
path = Pathname.new("/tmp/new").tap(&:mkpath)
```
I think it would be cleaner to be able to chain on the results of these methods instead:
```
path = Pathname.new("/tmp/new").mkpath
```
When I want to create a tmpdir I often want to manipulate it as a pathname. By introducing Pathname.mktmpdir I can get this behavior.
Currently I must:
```ruby
Dir.mktmpdir do |dir|
dir = Pathname(dir)
# ... code
end
```
I would like to be able to instead:
```ruby
Pathname.mktmpdir do |dir|
# ... code
end
```
delete_prefix with a string is easier to read than a regular expression
also it should be faster. It is available since ruby 2.5 and the gem requires
ruby 2.7.
https://github.com/ruby/pathname/commit/0070f43f19
The gem doesn't even install on old rubies, but since the gemspec claims
it's supported, `gem install pathname` will try to install it and print
an error.
This commit doesn't fix the above issue. The only way to fix it would be
to restore support and release a new version that actually supports old
rubies. However, such a change has been proposed and ignored for a long
time.
So this issue proposes to leave that broken but at least bring the
gemspec manifest and the CI matrix in sync to hopefully avoid this issue
from happening again in the future.
https://github.com/ruby/pathname/commit/3ee010b538
Currently when calling any of the "FileUtils" methods on pathname `require` is called every time even though that library might already be loaded. This is slow:
We can speed it up by either checking first if the constant is already defined, or by using autoload.
Using defined speeds up the action by about 300x and using autoload is about twice as fast as that (600x faster than current require method).
I'm proposing we use autoload:
```ruby
require 'benchmark/ips'
Benchmark.ips do |x|
autoload(:FileUtils, "fileutils")
x.report("require") { require 'fileutils' }
x.report("defined") { require 'fileutils' unless defined?(FileUtils) }
x.report("autoload") { FileUtils }
x.compare!
end
# Warming up --------------------------------------
# require 3.624k i/100ms
# defined 1.465M i/100ms
# autoload 2.320M i/100ms
# Calculating -------------------------------------
# require 36.282k (± 2.4%) i/s - 184.824k in 5.097153s
# defined 14.539M (± 2.0%) i/s - 73.260M in 5.041161s
# autoload 23.100M (± 1.9%) i/s - 115.993M in 5.023271s
# Comparison:
# autoload: 23099779.2 i/s
# defined: 14538544.9 i/s - 1.59x (± 0.00) slower
# require: 36282.3 i/s - 636.67x (± 0.00) slower
```
Because this autoload is scoped to Pathname it will not change the behavior of existing programs that are not expecting FileUtils to be loaded yet:
```
ruby -rpathname -e "class Pathname; autoload(:FileUtils, 'fileutils'); end; puts FileUtils.exist?"
Traceback (most recent call last):
-e:1:in `<main>': uninitialized constant FileUtils (NameError)
```
This method is explicitly documented to not access the filesystem,
and the only way to get the correct behavior for a case where the
filesystem's case sensitivity differs from the operating system
default would be to access the filesystem.
Fixes [Bug #15417]
This removes the related tests, and puts the related specs behind
version guards. This affects all code in lib, including some
libraries that may want to support older versions of Ruby.
Hiroshi SHIBATA
schneems
Ivan Kuchin
卜部昌平
Peter Zhu
Matt Valentine-House
Nobuyoshi Nakada
Takashi Kokubun
Akinori MUSHA
David Rodríguez
Jeremy Evans
Olle Jonsson
Kenichi Kamiya
Kenta Murata
Marc-Andre Lafortune
Kazuhiro NISHIYAMA
Masataka Pocke Kuwabara