Bugzilla

mozilla build configuration & logging goes in ~/.mozbuild **by default**, but you can override that with the `$MOZBUILD_STATE_PATH` environmental variable (which I do, to keep my home directory more lightweight).

As of version 1.21, moz-phab now tries to store things in your mozbuild directory, but it does not respect this environmental variable.  In particular, I hit bug 1544727 (where it's trying to find a logging directory) with this error:
```
IOError: [Errno 2] No such file or directory: '/home/dholbert/.mozbuild/moz-phab/moz-phab.log'
```

...despite the fact that I have this env variable set:
`MOZBUILD_STATE_PATH=/scratch/work/builds/.mozbuild`


EXPECTED RESULTS:
moz-phab should respect my MOZBUILD_STATE_PATH environmental variable.


I think the issue is with this line:
```
MOZBUILD_PATH = os.path.join(HOME_DIR, ".mozbuild", "moz-phab")
```
https://github.com/mozilla-conduit/review/blob/d0e4945c22df02bab49701bf380fa07cc5985811/moz-phab#L79

mozilla build configuration & logging goes in ~/.mozbuild **by default**, but you can override that with the `$MOZBUILD_STATE_PATH` environmental variable (which I do, to keep my home directory more lightweight).

As of version 1.21, moz-phab now tries to store things in your mozbuild directory, but it does not respect this environmental variable.  In particular, I hit bug 1544727 (where it's trying to find a logging directory) with this error:
```
IOError: [Errno 2] No such file or directory: '/home/dholbert/.mozbuild/moz-phab/moz-phab.log'
```

...despite the fact that I have this env variable set:
`MOZBUILD_STATE_PATH=/scratch/work/builds/.mozbuild`


ACTUAL RESULTS:
moz-phab tries to put stuff in `~/.mozbuild` (which does not exist on my system)

EXPECTED RESULTS:
moz-phab should respect my `MOZBUILD_STATE_PATH` environmental variable and put things there instead.


I think the issue is with this line:
```
MOZBUILD_PATH = os.path.join(HOME_DIR, ".mozbuild", "moz-phab")
```
https://github.com/mozilla-conduit/review/blob/d0e4945c22df02bab49701bf380fa07cc5985811/moz-phab#L79