Detection by extension made case-insensitive

lib/linguist/file_blob.rb

@@ -67,7 +67,7 @@ module Linguist
     #
     # Returns an Array
     def extensions
-      basename, *segments = File.basename(name).split(".")
+      basename, *segments = File.basename(name).downcase.split(".")
 
       segments.map.with_index do |segment, index|
         "." + segments[index..-1].join(".")

lib/linguist/language.rb

@@ -80,7 +80,7 @@ module Linguist
           raise ArgumentError, "Extension is missing a '.': #{extension.inspect}"
         end
 
-        @extension_index[extension] << language
+        @extension_index[extension.downcase] << language
       end
 
       language.interpreters.each do |interpreter|
@@ -198,7 +198,7 @@ module Linguist
     # Returns all matching Languages or [] if none were found.
     def self.find_by_extension(extname)
       extname = ".#{extname}" unless extname.start_with?(".")
-      @extension_index[extname]
+      @extension_index[extname.downcase]
     end
 
     # DEPRECATED
@@ -535,8 +535,8 @@ module Linguist
 
     if extnames = extensions[name]
       extnames.each do |extname|
-        if !options['extensions'].index { |x| x.end_with? extname }
-          warn "#{name} has a sample with extension (#{extname}) that isn't explicitly defined in languages.yml" unless extname == '.script!'
+        if !options['extensions'].index { |x| x.downcase.end_with? extname.downcase }
+          warn "#{name} has a sample with extension (#{extname.downcase}) that isn't explicitly defined in languages.yml" unless extname == '.script!'
           options['extensions'] << extname
         end
       end

lib/linguist/languages.yml

@@ -204,7 +204,6 @@ Assembly:
   - nasm
   extensions:
   - .asm
-  - .ASM
   - .a51
   tm_scope: source.asm.x86
   ace_mode: assembly_x86
@@ -349,8 +348,6 @@ C:
   color: "#555"
   extensions:
   - .c
-  - .C
-  - .H
   - .cats
   - .h
   - .idc
@@ -429,8 +426,6 @@ COBOL:
   type: programming
   extensions:
   - .cob
-  - .COB
-  - .CPY
   - .cbl
   - .ccp
   - .cobol
@@ -867,14 +862,6 @@ FORTRAN:
   color: "#4d41b1"
   extensions:
   - .f90
-  - .F
-  - .F03
-  - .F08
-  - .F77
-  - .F90
-  - .F95
-  - .FOR
-  - .FPP
   - .f
   - .f03
   - .f08
@@ -918,9 +905,7 @@ Forth:
   color: "#341708"
   extensions:
   - .fth
-  - .4TH
   - .4th
-  - .F
   - .f
   - .for
   - .forth
@@ -969,7 +954,6 @@ GAS:
   group: Assembly
   extensions:
   - .s
-  - .S
   tm_scope: source.asm.x86
   ace_mode: assembly_x86
 
@@ -1127,7 +1111,6 @@ Graphviz (DOT):
   tm_scope: source.dot
   extensions:
   - .dot
-  - .DOT
   - .gv
   ace_mode: text
 
@@ -2210,7 +2193,6 @@ Perl:
   color: "#0298c3"
   extensions:
   - .pl
-  - .PL
   - .cgi
   - .fcgi
   - .perl
@@ -2442,8 +2424,6 @@ R:
   - splus
   extensions:
   - .r
-  - .R
-  - .Rd
   - .rd
   - .rsx
   filenames:
@@ -2496,7 +2476,6 @@ RMarkdown:
   ace_mode: markdown
   extensions:
   - .rmd
-  - .Rmd
   tm_scope: none
 
 Racket:
@@ -3201,11 +3180,11 @@ XML:
   - .svg
   - .targets
   - .tmCommand
+  - .tml
   - .tmLanguage
   - .tmPreferences
   - .tmSnippet
   - .tmTheme
-  - .tml
   - .ts
   - .ui
   - .urdf