Merge "For mixed build bazel actions, remove old outputs"

		// cd into Bazel's execution root, which is the action cwd.

		cmd.Text(fmt.Sprintf("cd %s/execroot/__main__ &&", ctx.Config().BazelContext.OutputBase()))

		// Remove old outputs, as some actions might not rerun if the outputs are detected.

		if len(buildStatement.OutputPaths) > 0 {

			cmd.Text("rm -f")

			for _, outputPath := range buildStatement.OutputPaths {

				cmd.Text(PathForBazelOut(ctx, outputPath).String())

			}

			cmd.Text("&&")

		}

		for _, pair := range buildStatement.Env {

			// Set per-action env variables, if any.

			cmd.Flag(pair.Key + "=" + pair.Value)