[ruby-core:98221] [Ruby master Bug#16831] Running `Pathname#glob` with `File::FNM_DOTMATCH` option loses `.` and `..`

Issue #16831 has been updated by Dan0042 (Daniel DeLorme).


I don't think those can have consistent results, because Pathname#glob is equivalent to using the `base` option of `Dir.glob` and then joining the paths, which is not the same as joining the paths into a glob and then invoking `Dir.glob`. In particular they have different behavior if the base contains glob characters. And I don't think there's a method of Pathname that allows to join without cleaning the path.

```ruby
b = Pathname.new("ext")
b.glob("*").min            #=> #<Pathname:ext/-test->
Dir.glob("*", base: b).min #=> "-test-"
Dir.glob(b+"*").min        #=> "ext/-test-"

b = Pathname.new("{ext,man}")
b.glob("*").min            #=> nil because there's no literal "{ext,man}" dir
Dir.glob("*", base: b).min #=> nil
Dir.glob(b+"*").min        #=> "ext/-test-"
```


----------------------------------------
Bug #16831: Running `Pathname#glob` with `File::FNM_DOTMATCH` option loses `.` and `..`
https://bugs.ruby-lang.org/issues/16831#change-85461

* Author: jnchito (Junichi Ito)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-darwin19]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
Running `Dir.glob`, `Pathname.glob` with `File::FNM_DOTMATCH` option keeps `.` and `..` as their basename:

``` ruby
require 'pathname'

pathname = Pathname.pwd
#=> #<Pathname:/Users/jnito/dev>

# Dir.glob keeps "." and ".."
Dir.glob(pathname.join('*'), File::FNM_DOTMATCH).sort[0..1]
#=> ["/Users/jnito/dev/.", "/Users/jnito/dev/.."]

# Pathname.glob keeps "." and ".." too
Pathname.glob(pathname.join('*'), File::FNM_DOTMATCH).sort[0..1]
#=> [#<Pathname:/Users/jnito/dev/.>, #<Pathname:/Users/jnito/dev/..>]
```

I expect `Pathname#glob` with `File::FNM_DOTMATCH` option has same behavior, but it loses `.` and `..`:

``` ruby
# Pathname#glob loses "." and ".."
pathname.glob('*', File::FNM_DOTMATCH).sort[0..1]
#=> [#<Pathname:/Users/jnito>, #<Pathname:/Users/jnito/dev>]
```

I wanted to replace my code from `Pathname.glob(pathname.join('*'), File::FNM_DOTMATCH)` to `pathname.glob('*', File::FNM_DOTMATCH)`, but I couldn't do due to their incompatibility. So I want `Pathname#glob` to keep `.` and `..`.




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