If you're seeking to stay within the Atlassian ecosystem, the product that you're looking for is actually FishEye[0]. (Yes, yes, paying money, etc., but if you're a large organization, you're already used to buying stuff off the shelf to solve problems like this.)
On the other hand, if you don't feel like drinking the Atlassian sugary beverage with an odd taste, there's LXR[1] (and LXRng[2]), OpenGrok[3] (remember OpenGrok?), and Etsy's Hound[4], not to mention Russ Cox's standalone Go implementation of Google's code search tool[5].
On the other hand, if you don't feel like drinking the Atlassian sugary beverage with an odd taste, there's LXR[1] (and LXRng[2]), OpenGrok[3] (remember OpenGrok?), and Etsy's Hound[4], not to mention Russ Cox's standalone Go implementation of Google's code search tool[5].
0: https://www.atlassian.com/software/fisheye 1: http://lxr.sourceforge.net/ 2: Ironically enough, search Github. lxr.linux.no went down some time ago. 3: http://opengrok.github.io/OpenGrok/ 4: https://github.com/etsy/Hound 5: https://github.com/google/codesearch