Saturday, August 2, 2014

Google App Engine: skipping complete directory via skip_files

I forgot all about the skip_files in app.yaml and asked my favorite search engine what to do. A number of the top pages returned made it unnecessarily complicated. Just do this to skip directories (.idea and tools in this example):

- ^(.*/)?#.*#$
- ^(.*/)?.*~$
- ^(.*/)?.*\.py[co]$
- ^(.*/)?.*/RCS/.*$
- ^(.*/)?\..*$
- ^\.idea$
- ^tools$

(These are top-level directories within my app engine project.)

Add -v to your ... update ... invocation to confirm, from messages like

2014-08-02 09:19:20,424 INFO Ignoring directory '.idea': Directory matches ignore regex. 
2014-08-02 09:19:20,425 INFO Processing file 'app.yaml' 
2014-08-02 09:19:20,426 INFO Processing file 'index.yaml' 
2014-08-02 09:19:20,426 INFO Processing file '' 
2014-08-02 09:19:20,426 INFO Ignoring file 'main.pyc': File matches ignore regex. 
2014-08-02 09:19:20,426 INFO Processing file '' 
2014-08-02 09:19:20,427 INFO Ignoring directory 'tools': Directory matches ignore regex. 
2014-08-02 09:19:20,429 INFO Processing file 'static/Chart.min.js' 

Friday, August 1, 2014

Another year (or two), another release of mod_whatkilledus and mod_backtrace

mod_whatkilledus and mod_backtrace V2.01

I have a sinking feeling that this isn't pertinent to a fairly large percentage of the world's inhabitants, but it was a fair amount of hours spread over time and it's finally done, so I'll pretend otherwise.

mod_whatkilledus improvements

  • The name of the log file can now be configured with the WKULogfile directive.
  • On Windows: Add directive WKUDisableWindowsErrorBox to allow disabling the pop-up error handling dialog after a child process crash.
  • On Windows: Handle exceptions in 64-bit builds.
  • With Event MPM on Unix: When building with httpd 2.4.10 or later, properly track request processing across threads with the Event MPM. Previously, the wrong client and/or request might be logged as the trigger for a crash (with the Event MPM only). The change is not effective when building with httpd 2.4.9 or earlier.

mod_backtrace improvements

  • Support libunwind on Linux, FreeBSD, and OS X. This provides better resolution of function names, so a raw address will be provided in lieu of the function name in fewer situations. (Add LIBUNWIND=yes to the make invocation.) OS X note: A libunwind build silently fails to capture a backtrace with 32-bit builds, so use the default mechanism with 32-bit builds on OS X.
  • Filter out internal functions from backtraces so that only the caller's stack frames are reported.
  • Improve formatting of a backtrace for the error log field.

Windows binaries

64-bit binaries are now included for use with httpd 2.2 and 2.4 on Windows. (32-bit binaries are still included.)

Build improvements

  • Support make APXS=/path/to/apxs for building with non-default install layouts.
  • Support Clang on FreeBSD 10.
  • Add -funwind-tables on ARM platform for better backtraces.
  • mod_whatkilledus fails to build in a less mysterious way when using an httpd build that doesn't have exception hooks enabled.