Since there is no Xcode script variable for "current project directory," how can you create a script menu item to run the Clang Static Analyzer on your current project from Xcode?
From the XCode script menu item, "Edit User Scripts" enter the following script:
#!/bin/bash
result=$( osascript << END
tell application "Xcode"
tell active project document
set projectPath to path as string
end tell
end tell
return projectPath
END
)
cd "$result"
/Developer/clangchecker/scan-build -k -V xcodebuild -configuration Debug -sdk iphonesimulator3.0
Obviously, you will need to adjust the path to your install of Clang, and adjust to the version of the SDK you are using.
Remember to do a "Clean All" immediately before using scan-build, or the results may be incomplete.