Get current Scheme Name from Run Script Phase

Question

Is there a way of grabbing the current scheme from a run script phase?

I\'ve tried $(SCHEME_NAME) but it doesn\'t exist.

Answer 1

I couldn't find an environment variable to use, so I had to develop a work around: write a scheme name to disk in the Build Pre-action and then read it back out in the Run Script phase.

For each scheme you're interested in go to Edit Scheme and add a script with the following code:

rm -rf ${INTERMEDIATES_OUTPUT_DIR}
mkdir -p ${INTERMEDIATES_OUTPUT_DIR}
echo MY_SCHEME_NAME > ${SCHEME_FILE}

Next, go to your build target's "Build Settings" and add two "User-Defined Settings":

INTERMEDIATES_OUTPUT_DIR=${PROJECT_DIR}/build/intermediates/${CONFIGURATION}/
SCHEME_FILE=${INTERMEDIATES_OUTPUT_DIR}current_scheme.txt

Open up your "Run script" and add this:

SCHEME_NAME=`cat ${SCHEME_FILE}`

Be sure to add the intermediates build directory to your .gitignore file.

Obviously you could simplify this a bit by hardcoding a file name but this is a bit more robust (and we have other stuff that ends up in the intermediates directory, too).

Answer 2

You can write the scheme name to the info.plist file and read it back in Run Script Phase, in Edit Scheme menu, choose Build -> Pre-actions and add the following script:

/usr/libexec/PlistBuddy -c "Set :SchemeName \"$SCHEME_NAME\"" "$INFOPLIST_FILE"

and then add the key SchemeName of type string in the info.plist, and its initial value is empty.

Finally, in the run script phase add the following:

SCHEME_NAME=$(/usr/libexec/PlistBuddy -c "Print SchemeName" "$INFOPLIST_FILE")

Answer 3

INTERMEDIATES_OUTPUT_DIR doesn't seem to work for building swift previews which I wanted customization on as well. I ended up doing something similar using defaults write which I found works in all cases and doesn't involve the creation of a file.

Prebuild:

defaults write com.apple.dt.Xcode LastBuildScheme "MySchemeName"`

Build Script:

[[ $(defaults read com.apple.dt.Xcode LastBuildScheme) = "MySchemeName" ]] && echo "Scheme" || echo "Not Scheme"