rake stats
rake stats is one of those less-oft used tasks when developing Rails applications, but it does provide a good breakdown of some code statistics. You’ll get total lines, lines of code, # of classes, # of methods, methods per class, lines of code per method and some ratios.
Here’s a breakdown of one project at work:
+———————————+———-+———-+————-+————-+——-+———-+
| Name | Lines | LOC | Classes | Methods | M/C | LOC/M |
+———————————+———-+———-+————-+————-+——-+———-+
| Controllers | 2414 | 1837 | 31 | 182 | 5 | 8 |
| Helpers | 319 | 248 | 0 | 38 | 0 | 4 |
| Models | 1576 | 1149 | 36 | 142 | 3 | 6 |
| Libraries | 1275 | 832 | 5 | 109 | 21 | 5 |
| Integration tests | 284 | 181 | 2 | 8 | 4 | 20 |
| Functional tests | 4406 | 3364 | 27 | 268 | 9 | 10 |
| Unit tests | 2287 | 1817 | 35 | 214 | 6 | 6 |
+———————————+———-+———-+————-+————-+——-+———-+
| Total | 12561 | 9428 | 136 | 961 | 7 | 7 |
+———————————+———-+———-+————-+————-+——-+———-+
Code LOC: 4066 Test LOC: 5362 Code to Test Ratio: 1:1.3
It is also aware of specs and higher-level testing tools like Cucumber. Here is the breakdown of another project:
+———————————+———-+———-+————-+————-+——-+———-+
| Name | Lines | LOC | Classes | Methods | M/C | LOC/M |
+———————————+———-+———-+————-+————-+——-+———-+
| Controllers | 329 | 267 | 13 | 39 | 3 | 4 |
| Helpers | 325 | 238 | 1 | 34 | 34 | 5 |
| Models | 1275 | 904 | 20 | 114 | 5 | 5 |
| Libraries | 85 | 68 | 3 | 8 | 2 | 6 |
| Model specs | 1037 | 839 | 2 | 4 | 2 | 207 |
| View specs | 406 | 337 | 0 | 1 | 0 | 335 |
| Controller specs | 674 | 537 | 0 | 1 | 0 | 535 |
| Helper specs | 103 | 84 | 0 | 0 | 0 | 0 |
| Mailer specs | 65 | 52 | 0 | 1 | 0 | 50 |
| Cucumber features | 338 | 192 | 0 | 3 | 0 | 62 |
+———————————+———-+———-+————-+————-+——-+———-+
| Total | 4637 | 3518 | 39 | 205 | 5 | 15 |
+———————————+———-+———-+————-+————-+——-+———-+
Code LOC: 1477 Test LOC: 2041 Code to Test Ratio: 1:1.4
A few times a year, I run rake stats for all our projects at work to get an idea of how our applications change over time at this level. I ran rake stats back in July and today I ran rake stats again. My summary was as follows: “Where we added code, we added tests, so our test coverage remained the same or improved. Good job.”
