updates your Xcode 4 info.plist with the current git tag as version and commit number

vTag.sh

# updates your info.plist with the current git tag as version and commit number 
#  in that tag as build numer, then ammends the changed file to git
#  run this after your normal commit but before you push
#
# this to be placed in the same directory as the xcode project file
# info.plist to be in the path [folder with projectfile]/[project name]/[project name]-Info.plist
# git tags to be in the form of v[number]
#
# Don't forget to do chmod +x ~/whatever/vTag.sh 
# 
# richy486@gmail.com
# twitter.com/richy486

fpp=`ls -d *.xcodeproj`
pn=${fpp%%.*}
echo $pn

cVersn=`/usr/libexec/PlistBuddy -c "Print :CFBundleShortVersionString" $pn/$pn-Info.plist`
cBuild=`/usr/libexec/PlistBuddy -c "Print :CFBundleVersion" $pn/$pn-Info.plist`

echo current version: $cVersn, current build: $cBuild

desc=`git describe --tags --long`
version=${desc#*v}
version=${version%%-*}
build=${desc#*-}
build=${build%%-*}
build="${version}.${build}"

echo new version: $version, new build: $build

/usr/libexec/PlistBuddy -c "Set CFBundleShortVersionString $version" $pn/$pn-Info.plist
/usr/libexec/PlistBuddy -c "Set CFBundleVersion $build" $pn/$pn-Info.plist

nVersn=`/usr/libexec/PlistBuddy -c "Print :CFBundleShortVersionString" $pn/$pn-Info.plist`
nBuild=`/usr/libexec/PlistBuddy -c "Print :CFBundleVersion" $pn/$pn-Info.plist`

echo changed version: $nVersn, changed build: $nBuild

git commit -a --amend -C HEAD

newDesc=`git describe --tags --long`
echo $newDesc