split-avr-sam.bash

#!/bin/bash -ex

git clone git@github.com:arduino/Arduino.git Arduino2
 
# cleaning up the Arduino repo
cd Arduino2
 
git branch -t ide-1.5.x origin/ide-1.5.x
git remote rm origin
 
git tag -l | xargs git tag -d
 
git checkout ide-1.5.x
git branch -D master
git branch master
git checkout master
git branch -D ide-1.5.x

git filter-branch --tag-name-filter cat --prune-empty --index-filter \
  'git ls-files -s |
	   grep -P -v "\\t\"*hardware/atmel/sam/" |
	   grep -P -v "\\t\"*hardware/tools/" |
	   sed "s-\\(\\t\"*\\)hardware/arduino/sam/-\1sam/-" |
	   sed "s-\\(\\t\"*\\)hardware/google/sam/-\1sam/google/-" |
	   sed "s-\\(\\t\"*\\)hardware/sam/-\1sam/-" |
	   sed "s-\\(\\t\"*\\)hardware/atmel/-\1sam/-" |
	   sed "s-\\(\\t\"*\\)hardware/arduino/avr/-\1avr/-" |
	   sed "s-\\(\\t\"*\\)hardware/arduino/-\1avr/-" |
	   sed "s-\\(\\t\"*\\)hardware/avr/-\1avr/-" |
	   sed "s-\\(\\t\"*\\)hardware/-\1avr/-" |
	   sed "s-\\(\\t\"*\\)targets/-\1avr/-" |
	   ( git ls-files --error-unmatch core/global.h > /dev/null 2> /dev/null && sed "s-\\(\\t\"*\\)core/-\1avr/-" || cat ) |
	   GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info &&
   ( ! [ -f "$GIT_INDEX_FILE.new" ] || mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE" )' -- --all

cd -

# creating a new "master" branch with only the contents (and history) of hardware/arduino/avr
git clone Arduino2 temp-core-avr
 
cd temp-core-avr
 
git remote rm origin
 
git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter avr -- --all
 
git reset --hard
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
git reflog expire --expire=now --all
git gc --aggressive --prune=now
 
git remote add origin git@github.com:matthijskooijman/arduino-platform-avr.git
 
git push origin master
 
cd -
 
# creating a new "master" branch with only the contents (and history) of hardware/arduino/sam
git clone Arduino2 temp-core-sam
 
cd temp-core-sam
 
git remote rm origin
 
git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter sam -- --all
 
git reset --hard
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
git reflog expire --expire=now --all
git gc --aggressive --prune=now
 
git remote add origin git@github.com:matthijskooijman/arduino-platform-sam.git
 
git push origin master

cd -