1. Clone this repo:

   rm -rf package/helloworld
   git clone --depth=1 https://github.com/fw876/helloworld.git package/helloworld

2. Pull upstream commits:

   git -C package/helloworld pull

• Remove

  rm -rf package/helloworld

1. Add new submodule:

   rm -rf package/helloworld
   git submodule add -f --name helloworld https://github.com/fw876/helloworld.git package/helloworld

2. Pull upstream commits:

   git submodule update --remote package/helloworld

• Remove

  git submodule deinit -f package/helloworld
  git rm -f package/helloworld
  git reset HEAD .gitmodules
  rm -rf .git/modules{/,/package/}helloworld

1. Add new feed:

   sed -i "/helloworld/d" "feeds.conf.default"
   echo "src-git helloworld https://github.com/fw876/helloworld.git" >> "feeds.conf.default"

2. Pull upstream commits:

   ./scripts/feeds update helloworld
   ./scripts/feeds install -a -f -p helloworld

• Remove

  sed -i "/helloworld/d" "feeds.conf.default"
  ./scripts/feeds clean
  ./scripts/feeds update -a
  ./scripts/feeds install -a

If you want to use this repo with official OpenWrt source tree, the following tools and packages need to be added manually:

tools:

• ucl
• upx

packages:

• dns2socks
• microsocks
• ipt2socks
• pdnsd-alt
• redsocks2

You may use svn to check them out, e.g.:

mkdir -p package/helloworld
for i in "dns2socks" "microsocks" "ipt2socks" "pdnsd-alt" "redsocks2"; do \
  svn checkout "https://github.com/immortalwrt/packages/trunk/net/$i" "package/helloworld/$i"; \
done

You should manually add the following code into tools/Makefile, make sure to add code before the compile command:

tools-y += ucl upx
$(curdir)/upx/compile := $(curdir)/ucl/compile

e.g.:

svn checkout https://github.com/coolsnowwolf/lede/trunk/tools/ucl tools/ucl
svn checkout https://github.com/coolsnowwolf/lede/trunk/tools/upx tools/upx

sed -i 'N;24a\tools-y += ucl upx' tools/Makefile
sed -i 'N;40a\$(curdir)/upx/compile := $(curdir)/ucl/compile' tools/Makefile

You should note that hard-coding the line number is not an ideal solution. It may destroy the structure of the original file due to the update of the openwrt source code and cause unexpected problems.