12 ounces rhubarb, trimmed and cut crosswise 1/4 inch thick
Heat oil in a medium saucepan over medium heat. Cook onion, garlic, ginger, and 1/2 teaspoon salt until onion is translucent, about 5 minutes. Remove from heat, and add wine and raisins. Return to heat, and bring to a boil; cook for 1 minute. Add sugar, and stir until it dissolves. Stir in half the rhubarb. Bring to a boil.
Reduce heat; simmer, partially covered, until rhubarb breaks down, about 5 minutes. Stir in remaining rhubarb. Raise heat; bring to a boil. Reduce heat; simmer until second batch of rhubarb just begins to soften, about 2 minutes. Let cool completely.
Sample the finished chutney, and adjust the flavor. If it's too tart, add sugar. If it's too sweet, add a little white-wine vinegar.