зеркало из https://github.com/microsoft/git.git
82 строки
2.4 KiB
Plaintext
82 строки
2.4 KiB
Plaintext
ref iteration API
|
|
=================
|
|
|
|
|
|
Iteration of refs is done by using an iterate function which will call a
|
|
callback function for every ref. The callback function has this
|
|
signature:
|
|
|
|
int handle_one_ref(const char *refname, const unsigned char *sha1,
|
|
int flags, void *cb_data);
|
|
|
|
There are different kinds of iterate functions which all take a
|
|
callback of this type. The callback is then called for each found ref
|
|
until the callback returns nonzero. The returned value is then also
|
|
returned by the iterate function.
|
|
|
|
Iteration functions
|
|
-------------------
|
|
|
|
* `head_ref()` just iterates the head ref.
|
|
|
|
* `for_each_ref()` iterates all refs.
|
|
|
|
* `for_each_ref_in()` iterates all refs which have a defined prefix and
|
|
strips that prefix from the passed variable refname.
|
|
|
|
* `for_each_tag_ref()`, `for_each_branch_ref()`, `for_each_remote_ref()`,
|
|
`for_each_replace_ref()` iterate refs from the respective area.
|
|
|
|
* `for_each_glob_ref()` iterates all refs that match the specified glob
|
|
pattern.
|
|
|
|
* `for_each_glob_ref_in()` the previous and `for_each_ref_in()` combined.
|
|
|
|
* `head_ref_submodule()`, `for_each_ref_submodule()`,
|
|
`for_each_ref_in_submodule()`, `for_each_tag_ref_submodule()`,
|
|
`for_each_branch_ref_submodule()`, `for_each_remote_ref_submodule()`
|
|
do the same as the functions described above but for a specified
|
|
submodule.
|
|
|
|
* `for_each_rawref()` can be used to learn about broken ref and symref.
|
|
|
|
* `for_each_reflog()` iterates each reflog file.
|
|
|
|
Submodules
|
|
----------
|
|
|
|
If you want to iterate the refs of a submodule you first need to add the
|
|
submodules object database. You can do this by a code-snippet like
|
|
this:
|
|
|
|
const char *path = "path/to/submodule"
|
|
if (add_submodule_odb(path))
|
|
die("Error submodule '%s' not populated.", path);
|
|
|
|
`add_submodule_odb()` will return zero on success. If you
|
|
do not do this you will get an error for each ref that it does not point
|
|
to a valid object.
|
|
|
|
Note: As a side-effect of this you can not safely assume that all
|
|
objects you lookup are available in superproject. All submodule objects
|
|
will be available the same way as the superprojects objects.
|
|
|
|
Example:
|
|
--------
|
|
|
|
----
|
|
static int handle_remote_ref(const char *refname,
|
|
const unsigned char *sha1, int flags, void *cb_data)
|
|
{
|
|
struct strbuf *output = cb_data;
|
|
strbuf_addf(output, "%s\n", refname);
|
|
return 0;
|
|
}
|
|
|
|
...
|
|
|
|
struct strbuf output = STRBUF_INIT;
|
|
for_each_remote_ref(handle_remote_ref, &output);
|
|
printf("%s", output.buf);
|
|
----
|