.editorconfig: add/disable files

add Gemfile, .json, .lock, .md, .pm

disable for some files or file types that are auto-generated
or require significant changes

.editorconfig

@@ -1,5 +1,5 @@
 # EditorConfig configuration for nixpkgs
-# http://EditorConfig.org
+# https://EditorConfig.org
 
 # Top-most EditorConfig file
 root = true
@@ -19,18 +19,56 @@ trim_trailing_whitespace = unset
 
 # see https://nixos.org/nixpkgs/manual/#chap-conventions
 
-# Match nix/perl/python/ruby/shell/docbook files, set indent to spaces
+# Match json/lockfiles/markdown/nix/perl/python/ruby/shell/docbook files, set indent to spaces
-[*.{nix,pl,py,rb,sh,xml}]
+[*.{json,lock,md,nix,pl,pm,py,rb,sh,xml}]
 indent_style = space
 
 # Match docbook files, set indent width of one
 [*.xml]
 indent_size = 1
 
-# Match nix/ruby files, set indent width of two
+# Match json/lockfiles/markdown/nix/ruby files, set indent width of two
-[*.{nix,rb}]
+[*.{json,lock,md,nix,rb}]
 indent_size = 2
 
 # Match perl/python/shell scripts, set indent width of four
-[*.{pl,py,sh}]
+[*.{pl,pm,py,sh}]
 indent_size = 4
+
+# Match gemfiles, set indent to spaces with width of two
+[Gemfile]
+indent_size = 2
+indent_style = space
+
+# Disable file types or individual files
+# some of these files may be auto-generated and/or require significant changes
+
+[*.lock]
+indent_size = unset
+
+[gemset.nix]
+insert_final_newline = unset
+
+[pkgs/applications/editors/emacs-modes/recipes-archive-melpa.json]
+indent_size = unset
+
+[pkgs/development/lisp-modules/quicklisp-to-nix.nix]
+indent_size = unset
+
+[pkgs/development/haskell-modules/hackage-packages.nix]
+indent_style = unset
+indent_size = unset
+trim_trailing_whitespace = unset
+
+[pkgs/development/mobile/androidenv/generated/{addons,packages}.nix]
+trim_trailing_whitespace = unset
+
+[pkgs/development/node-packages/*-v*.nix]
+insert_final_newline = unset
+
+[pkgs/servers/dict/wordnet_structures.py]
+indent_size = unset
+trim_trailing_whitespace = unset
+
+[pkgs/top-level/perl-packages.nix]
+indent_size = unset