[MacPorts] #64166: git: activation failure on buildbots, related to global gitconfig

[MacPorts]

#64166: git: activation failure on buildbots, related to global gitconfig
---------------------+-------------------------
 Reporter:  mascguy  |      Owner:  herbygillot
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  git
---------------------+-------------------------
 While reviewing failed builds on our 10.13 buildbot - with the goal of
 identifying ports fixable by forcing a rebuild - I noticed the following.

 This occurred during dependency installation, for port `retdec`. In short,
 activation of `git` failed, due to existence of the global `gitconfig`:

 {{{
 Error: Failed to activate git: Image error: /opt/local/etc/gitconfig
 already exists and does not belong to a registered port. Unable to
 activate port git. Use 'port -f activate git' to force the activation.
 }}}

 https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/132169/steps
 /install-dependencies/logs/stdio

 Might be related to the recent enhancement to `git`, whereby the port
 tries to avoid overwriting a user's existing global `gitconfig`. But not
 100% sure just yet:

 [https://github.com/macports/macports-ports/pull/13259 PR 13259 - git: do
 not overwrite system-wide gitconfig, when adding configuration for the
 osxkeychain credential helper]

 Related ticket: issue:63953

-- 
Ticket URL: <https://trac.macports.org/ticket/64166>
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