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commit-graph: add repo arg to graph readers

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Add a struct repository argument to the functions in commit-graph.h that
read the commit graph. (This commit does not affect functions that write
commit graphs.)

Because the commit graph functions can now read the commit graph of any
repository, the global variable core_commit_graph has been removed.
Instead, the config option core.commitGraph is now read on the first
time in a repository that a commit is attempted to be parsed using its
commit graph.

This commit includes a test that exercises the functionality on an
arbitrary repository that is not the_repository.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Tan
2018-07-11 15:42:42 -07:00
committed by Junio C Hamano
parent 8527750626
commit dade47c06c
13 changed files with 162 additions and 42 deletions
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cache.h
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@ -813,7 +813,6 @@ extern char *git_replace_ref_base;
extern int fsync_object_files;
extern int core_preload_index;
extern int core_commit_graph;
extern int core_apply_sparse_checkout;
extern int precomposed_unicode;
extern int protect_hfs;