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refs: add array of ref namespaces

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Git interprets different meanings to different refs based on their
names. Some meanings are cosmetic, like how refs in  'refs/remotes/*'
are colored differently from refs in 'refs/heads/*'. Others are more
critical, such as how replace refs are interpreted.

Before making behavior changes based on ref namespaces, collect all
known ref namespaces into a array of ref_namespace_info structs. This
array is indexed by the new ref_namespace enum for quick access.

As of this change, this array is purely documentation. Future changes
will add dependencies on this array.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2022-08-05 17:58:36 +00:00
committed by Junio C Hamano
parent 5797b13919
commit b9342b3fd6
4 changed files with 132 additions and 0 deletions
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2
environment.c
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@ -185,6 +185,8 @@ void setup_git_env(const char *git_dir)
free(git_replace_ref_base);
git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
: "refs/replace/");
update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base);
free(git_namespace);
git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);