sync_default_gems.rb: merge only files named as each gem

Author: nobu

tool/sync_default_gems.rb

@@ -349,16 +349,6 @@ def sync_default_gems(gem)
   end
 end
 
-IGNORE_FILE_PATTERN =
-  /\A(?:[A-Z]\w*\.(?:md|txt)
-  |[^\/]+\.yml
-  |\.git.*
-  |[A-Z]\w+file
-  |COPYING
-  )\z|
-  |rakelib\/
-  /x
-
 def message_filter(repo, sha)
   log = STDIN.read
   print "[#{repo}] ", log.sub(/\s*(?=(?i:\nCo-authored-by:.*)*\Z)/) {
@@ -370,6 +360,11 @@ def sync_default_gems_with_commits(gem, ranges, edit: nil)
   repo = REPOSITORIES[gem.to_sym]
   puts "Sync #{repo} with commit history."
 
+  file_pattern = gem == repo ? gem : "{#{gem},#{repo}}"
+  file_pattern = "*/#{file_pattern}{,.*,/**/*}"
+  fnm_option = File::FNM_PATHNAME | File::FNM_DOTMATCH
+  file_match = proc {|file| File.fnmatch?(file_pattern, file, fnm_option)}
+
   IO.popen(%W"git remote") do |f|
     unless f.read.split.include?(gem)
       `git remote add #{gem} git@github.com:#{repo}.git`
@@ -395,8 +390,9 @@ def sync_default_gems_with_commits(gem, ranges, edit: nil)
 
   # Ignore Merge commit and insufficiency commit for ruby core repository.
   commits.delete_if do |sha, subject|
-    files = IO.popen(%W"git diff-tree --no-commit-id --name-only -r #{sha}", &:readlines)
-    subject =~ /^Merge/ || subject =~ /^Auto Merge/ || files.all?{|file| file =~ IGNORE_FILE_PATTERN}
+    next true if /^(?:Auto )?Merge/ =~ subject
+    IO.popen(%W"git diff-tree --no-commit-id --name-only -r #{sha}", &:read)
+      .split("\n").none?(&file_match)
   end
 
   if commits.empty?
@@ -433,10 +429,9 @@ def sync_default_gems_with_commits(gem, ranges, edit: nil)
     if result.empty?
       skipped = true
     elsif /^CONFLICT/ =~ result
-      result = IO.popen(%W"git status --porcelain", &:readlines).each(&:chomp!)
-      result.map! {|line| line[/^.U (.*)/, 1]}
+      result = IO.popen(%W"git status --porcelain", &:readlines).map! {|line| line[/^.U (.*)/, 1]}
       result.compact!
-      ignore, conflict = result.partition {|name| IGNORE_FILE_PATTERN =~ name}
+      conflict, ignore = result.partition(&file_match)
       unless ignore.empty?
         system(*%W"git reset HEAD --", *ignore)
         File.unlink(*ignore)