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git/contrib/coccinelle/commit.cocci
Nguyễn Thái Ngọc Duy 301b8c7f40 commit.c: add repo_get_commit_tree()
Remove the implicit dependency on the_repository in this function.
It will be used in sha1-name.c functions when they are updated to take
any 'struct repository'. get_commit_tree() remains as a compat wrapper,
to be slowly replaced later.

Any access to "maybe_tree" field directly will result in _broken_ code
after running through commit.cocci because we can't know what is the
right repository to use.

the_repository would be correct most of the time. But we're relying less
and less on the_repository and that assumption may no longer be
true. The transformation now is more of a poor man replacement for a C++
compiler catching access to private fields.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-16 18:56:51 +09:00

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@@
expression c;
@@
- &c->maybe_tree->object.oid
+ get_commit_tree_oid(c)
@@
expression c;
@@
- c->maybe_tree->object.oid.hash
+ get_commit_tree_oid(c)->hash
@@
identifier f !~ "^set_commit_tree$";
expression c;
expression s;
@@
f(...) {<...
- c->maybe_tree = s
+ set_commit_tree(c, s)
...>}
// These excluded functions must access c->maybe_tree direcly.
// Note that if c->maybe_tree is written somewhere outside of these
// functions, then the recommended transformation will be bogus with
// repo_get_commit_tree() on the LHS.
@@
identifier f !~ "^(repo_get_commit_tree|get_commit_tree_in_graph_one|load_tree_for_commit|set_commit_tree)$";
expression c;
@@
f(...) {<...
- c->maybe_tree
+ repo_get_commit_tree(specify_the_right_repo_here, c)
...>}