# vim: ts=2 sw=2 et ai
#
# Version:
#           ruby 2.6.5p114 (2019-10-01 revision 67812) [x64-mingw32]
#           
# Summary: Dir globbing case sensitivity inconsistencies
#
# Details: directory globbing case sensitivity is os-dependent
#          (https://ruby-doc.org/core-2.6.5/Dir.html, glob,
#          "Case sensitivity depends on your system");
#          On Windows 10, directory globbing is case insensitive,
#          and may return glob matches that do
#          not match the case of the query.
#          Unfortunately, File.fnmatch seems to be case sensitive,
#          so this is not a workaround.
#
# Expected:
#         If Dir.pwd => 'C:/users/dave/Documents' (lower case for users)
#         then Dir[Dir.pwd+'/*'] => ['C:/users/dave/Documents/...',...]
#         (lower case for users), not [C:/Users/dave/Documents/...',...]
#
#
# Impact:
#          Rails 6.0 Activeview implementation has an assumption that
#          case is sensitive.
#
# Demonstration:
#          The below script yields the following output. Note that
#          Dir.pwd yields C:/users..., where a Dir glob of files in
#          that directory is prefixed with C:/Users...

cd = Dir.pwd
puts "Dir.pwd => '#{cd}'"
cds = cd + '/*'
fm0 = Dir[cds][0]
puts "Dir['#{cds}'][0] => '#{fm0}'"
puts "Does the first matching entry match the base path of the query?"
m = fm0.start_with? cd
p m
# How about File.fnmatch?
m2 = File.fnmatch cds,fm0
puts "fnmatch: #{m2}"

#=> Dir.pwd => 'C:/users/dave/Documents/rails'
#=> Dir['C:/users/dave/Documents/rails/*'][0] => 'C:/Users/dave/Documents/rails/blog'
#=> Does the first matching entry match the base path of the query?
#=> false
#=> fnmatch: false