Allow libgit2 to guess sysdir homedir successfully (bsc#1250520) (bsc#1227207) #731
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This prevents the generic error: _pygit2.GitError: error loading known_hosts: which is happening in certain pygit2/libgit2 versions
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What does this PR do?
This PR fixes the generic error that is still seen around gitfs with certain
pygit2andlibgit2versions:After debugging
libgit2andpygit2I was able to understand what's going on here. The internalgit_sysdir__dirsstruct is populated duringlibgit2initialization, which is only triggered at the time of importingpygit2module.If the
HOMEenvironment variable is not defined when importingpygit2, then the internal guess function fromlibgit2to determine the homedir (git_sysdir_guess_home_dirs) fails to define the HOME path for the initializated stack. Therefore the above error occurs.Also once
pygit2/libgit2is instantiated, there is no way untilpygit2version 1.18.2 to explicitely redefine the internal home dir on the initializated stack, asGIT_OPT_SET_HOMEDIRwasn't implemented inpygit2until 1.18.2. See libgit2/pygit2#1409So, this PR makes sure the
HOMEenv variable is present at the time of importingpygit2atsalt.utils.gitfs.Upstream PR: saltstack/salt#68366
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