some infor to readme

README.md

@@ -1,4 +1,56 @@
 pkgbuild
 ========
 
-My Arch AUR PKGBUILD's
+My Arch AUR PKGBUILD's. At the moment it is only for private use since any package
+points to git repository by using SSH protocol (thus it requires my private key).
+
+Clone or update submodule statuses
+----------------------------------
+
+```
+# clone if no repository cloned
+git clone https://github.com/arcan1s/pkgbuild.git
+cd pkgbuild
+git submodule update --init
+```
+
+Add package
+-----------
+
+```
+cd pkgbuild
+git submodule add ssh+git://aur@aur.archlinux.org/$pkgbase.git/
+# some changes here if required (see package update below)
+git add $pkgbase
+git commit -m 'add $pkgbase'
+git push
+```
+
+Update package
+--------------
+
+```
+cd pkgbuild/$pkgbase
+vim PKGBUILD
+# some changes here
+mkscrinfo
+git add PKGBUILD .SRCINFO       # newly created files should be added too
+git commit -m 'bump $pkgbase to $pkgver-$pkgrel'
+git push
+# now update repository
+cd ..
+git add $pkgbase
+git commit -m 'bump $pkgbase to $pkgver-$pkgrel'
+git push
+```
+
+Force update submodules to AUR state
+------------------------------------
+
+```
+cd pkgbuild
+git submodule foreach git pull origin master
+git add -A .                    # or smth like this
+git commit -m 'bump packages to aur versions'
+git push
+```