I noticed that the pg_upgrade check_ functions were determining failures found in a few different ways. Some keep a boolen flag variable, and some (like check_for_incompatible_polymorphics) check the state of the script filehandle which is guaranteed to be set (with the error message referring to the path of said file). Others like check_loadable_libraries only check the flag variable and fclose the handle assuming it was opened.
The attached diff changes the functions to do it consistently in one way, by checking the state of the filehandle. Since we are referring to the file by path in the printed error message it seemed the cleanest approach, and it saves a few lines of code without IMO reducing readability. There is no change in functionality, just code consistency. -- Daniel Gustafsson https://vmware.com/
v1-0001-Refactor-check_-functions-to-use-filehandle-for-s.patch
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