json-validate.xcodecustomscript

# Function to strip the comments
function strip_comments {
    # Strip comments and leave empty lines, so line numbers are preserved
    sed 's/^[[:blank:]]*\/\/.*$//g' "$1"
}

# Function to do the validation
function do_validation {
    # Use json.tool to validate, sending stderr to stdout
    echo "$1" | python -m json.tool 2>&1 > /dev/null
}

# Function to process validation errors
function handle_invalid {
    # Parse the line and column from the output
    MATCH="line ([0-9]+) column ([0-9]+)"
    if [[ "$1" =~ $MATCH ]]; then
        LINE=${BASH_REMATCH[1]}
        COLUMN=${BASH_REMATCH[2]}
    fi
    echo "$INPUT_FILE_PATH:$LINE:$COLUMN: error: $1"
}

# Function to wrap all the validation steps
function validate {
    # Do validation
    VALIDATION_ERROR=$(do_validation "$1")
    # Check return status
    local STATUS=$?
    if [ $STATUS -ne 0 ]; then
        handle_invalid "$VALIDATION_ERROR"
    fi
    # Return the exit status from the validation
    return $STATUS
}

# Get the stripped file
STRIPPED=$(strip_comments "$INPUT_FILE_PATH")

# Validate the JSON
validate "$STRIPPED"
VALIDATION_STATUS=$?

# Carry on, even if there was an error (file still copied to bundle)
echo "$STRIPPED" > "$DERIVED_FILE_DIR/$INPUT_FILE_NAME"

# Exit with the validation status
exit $VALIDATION_STATUS