common.mk: uninstall

* common.mk (uninstall): uninstall installed file listed in
  $(INSTALLED_LIST) file.

* tool/rbuninstall.rb: simple uninstallation tool.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

common.mk

@@ -323,6 +323,9 @@ dont-install-all: $(PROGRAM)
 post-no-install-all:: post-no-install-local post-no-install-ext post-no-install-doc
 	@$(NULLCMD)
 
+uninstall: $(INSTALLED_LIST)
+	$(Q)$(SUDO) $(MINIRUBY) $(srcdir)/tool/rbuninstall.rb --destdir=$(DESTDIR) $(INSTALLED_LIST)
+
 what-where-nodoc: no-install-nodoc
 no-install-nodoc: pre-no-install-nodoc dont-install-nodoc post-no-install-nodoc
 pre-no-install-nodoc:: pre-no-install-local pre-no-install-ext

tool/rbuninstall.rb

@@ -0,0 +1,51 @@
+#! /usr/bin/ruby -nl
+BEGIN {
+  $dryrun = false
+  until ARGV.empty?
+    case ARGV[0]
+    when /\A--destdir=(.*)/
+      $destdir = $1
+    when /\A-n\z/
+      $dryrun = true
+    else
+      break
+    end
+    ARGV.shift
+  end
+  $dirs = []
+  $files = []
+}
+list = (/\/\z/ =~ $_ ? $dirs : $files)
+$_ = File.join($destdir, $_) if $destdir
+list << $_
+END {
+  status = true
+  if $dryrun
+    $files.each do |file|
+      puts "rm #{file}"
+    end
+    $dirs.reverse_each do |dir|
+      puts "rmdir #{dir}"
+    end
+  else
+    $files.each do |file|
+      begin
+        File.unlink(file)
+      rescue Errno::ENOENT
+      rescue
+        status = false
+        puts $!
+      end
+    end
+    $dirs.reverse_each do |dir|
+      begin
+        Dir.rmdir(dir)
+      rescue Errno::ENOENT, Errno::ENOTEMPTY
+      rescue
+        status = false
+        puts $!
+      end
+    end
+  end
+  exit(status)
+}