Create branch for new channel based on the latest channel instead of master (#193)

Author: filipesperandio

bin/newver

@@ -7,13 +7,20 @@ if [ $# -eq 0 ]; then
 fi
 NEWVER="$1"
 
+previous_channel() {
+  cat <<EOM | ruby
+    version = "${NEWVER}".match(/(\d+).(\d+).(\d+)/)
+    minor = version[2].to_i - 1
+    puts "channel/rubocop-#{version[1]}-#{minor}"
+EOM
+}
+
 git checkout Gemfile*
+git fetch origin
+git checkout $(previous_channel)
 git checkout -b "newver/${NEWVER}"
 
 ed Gemfile <<-EDITS
-/gem "parser",/c
-gem "parser"
-.
 /gem "rubocop",/c
 gem "rubocop", "${NEWVER}", require: false
 .