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...caused by incorrectly setting and resetting the library internal
state and the misuse of pthreads in libgit2.
Normally, git_libgit2_init and git_libgit2_shutdown should span the
life of a worker thread in order to be safely used. However, due to
an incorrect implementation of libgit2's threadstate with pthreads,
on unix systems there is a race condition.
Until the use of pthread_key_t is corrected in libgit2, we need to
apply a workaround by always ensuring that the main thread is the
first thread reaching the GitContext constructor.
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... with two minor code base changes compared to previous
use of gsl-lite:
- dag.hpp: ActionNode::Ptr and ArtifactNode::Ptr are not
wrapped in gsl::not_null<> anymore, due to lack of support
for wrapping std::unique_ptr<>. More specifically, the
move constructor is missing, rendering it impossible to
use std::vector<>::emplace_back().
- utils/cpp/gsl.hpp: New header file added to implement the
macros ExpectsAudit() and EnsureAudit(), asserts running
only in debug builds, which were available in gsl-lite but
are missing in MS GSL.
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In the current libgit2 implementation, a fake repository wrapped
around an existing odb is being registered as owner the same way
as a normal repository object. Therefore, one has to guard both
the creation and destruction of the fake repository against all
other git operations that might access the internal cache during
this transfer of ownership.
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...in order to not include unwanted dependencies in just proper.
The new class extends the GitRepo class used for just's Git tree
operations and gets used in all of just-mr's async maps.
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Removed unused file_system_manager dependency
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Signed-off-by: Goetz Brasche <goetz.brasche@huawei.com>
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Since in default (bundled) bootstrap, we bring our own version
of libgit2, also use that for the initial bootstrap step.
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This is the initial version of our tool that is able to
build itself. In can be bootstrapped by
./bin/bootstrap.py
Co-authored-by: Oliver Reiche <oliver.reiche@huawei.com>
Co-authored-by: Victor Moreno <victor.moreno1@huawei.com>
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