According to all intelligence reports by the UN's International Atomic Energy Agency and the US's CIA/NSA, Iran is not trying to develop nukes and has fully abandoned their nuclear program. Anyone saying elsewise is simply saber rattling.
What the are doing is developing a civilian nuclear industry. Such an industry---like any other industry---has the potential for making military development easier in the future, but that is not its primary purpose.
Considering the current geopolitical climate, you have to be extremely naive to believe that Iran's long term goal is not developing nuclear weapons. A "peaceful" civilian nuclear industry is only the first step.
What the are doing is developing a civilian nuclear industry. Such an industry---like any other industry---has the potential for making military development easier in the future, but that is not its primary purpose.