vcprompt slow on large repos

[gregglind]

Notable test case: https://github.com/mozilla/mozilla-central

This has been mentioned before other places, but I wonder if there is any way for vcprompt to auto-detect when it's "taking too long". I would rather not have to try to modify my ps1 depending on the directory.

1589 glind ~/gits/mozilla-central [git:master?] $ time vcprompt 
[git:master?] 
real    0m3.476s
user    0m0.421s
sys 0m1.610s

1590 glind ~/gits/mozilla-central [git:master?] $ time git status

real    0m6.032s
user    0m0.556s
sys 0m1.389s

[gregglind]

For solutions, maybe wrap subprocess call with a timeout, as in one of these solutions:

http://stackoverflow.com/questions/1191374/subprocess-with-timeout

[lkraav]

This is my... not sure if solution or workaround, for this problem:

lkraav@a22e32e

[djl]

Added a crude version in 6625c7b.

-t, --timeout or VCPROMPT_TIMEOUT can be used to set the timeout, which must be an integer. The default is 0 (no timeout). If the timeout is reached, vcprompt will exit with status 126 and no output.

I do like the idea behind @lkraav's solution. I'll see if I can come up with something that doesn't involve littering the file system with extra files (and extra stuff in a project's .gitignore).

[lkraav]

Yeah, litter is a concern. I don't much dig any lag in my systems, either. But it's one or the other, pick your poison.

[djl]

Added millisecond support in 6ff4ecd for Python 2.6+. Older version just fall back to standard per-second intervals.

I think this can be closed now :)