sloc is a simple, do-one-thing-well program to calculate code statistics: the
number of lines in a project, and how much of that is code versus comment.
$ sloc ~/misc/opt/go
Language Files Code Comment Blank Total
Total 2808 512357 87177 67791 667325
Go 2048 295054 62020 37973 395047
C 474 166702 22330 21849 210881
HTML 58 25627 183 4241 30051
Assembly 131 9974 161 1491 11626
YACC 6 5245 363 449 6057
Python 6 2940 789 495 4224
JavaScript 6 2526 496 585 3607
XML 9 974 15 90 1079
Shell 9 905 380 155 1440
CSS 6 899 24 119 1042
Perl 9 854 159 135 1148
Bash 13 483 151 122 756
Make 33 174 106 87 367
sloc cannot understand gitignore or hgignore, nor can it distinguish between
"real" source and auto-generated files, so for best results, run it on a fresh
repository with no compilation done.
You can generate JSON output with the -json flag, if that's easy to parse in
the programming/scripting language of your choice.