Handle race condition when creating cache directory

[vjik]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌
Fix #86

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 91.66%. Comparing base (c4fcb8f) to head (0362ce1).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/FileCache.php	91.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #89      +/-   ##
============================================
+ Coverage     91.19%   91.66%   +0.47%     
  Complexity       69       69              
============================================
  Files             1        1              
  Lines           159      168       +9     
============================================
+ Hits            145      154       +9     
  Misses           14       14              

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[samdark]

I wonder how bad is performance hit in this case...

[vjik]

I wonder how bad is performance hit in this case...

Probably not much. It's not affect case when folder already exists, but in cases when need to create directory error handler costs are low compared tocost of creating a folder, aren't it?

[samdark]

Right. Usually the directory will be already there.