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//! git_tag_foreach support
//! see original: <https://libgit2.org/libgit2/#HEAD/group/tag/git_tag_foreach>
use crate::{panic, raw, util::Binding, Oid};
use libc::{c_char, c_int};
use raw::git_oid;
use std::ffi::{c_void, CStr};
/// boxed callback type
pub(crate) type TagForeachCB<'a> = Box<dyn FnMut(Oid, &[u8]) -> bool + 'a>;
/// helper type to be able to pass callback to payload
pub(crate) struct TagForeachData<'a> {
/// callback
pub(crate) cb: TagForeachCB<'a>,
}
/// c callback forwarding to rust callback inside `TagForeachData`
/// see original: <https://libgit2.org/libgit2/#HEAD/group/callback/git_tag_foreach_cb>
pub(crate) extern "C" fn tag_foreach_cb(
name: *const c_char,
oid: *mut git_oid,
payload: *mut c_void,
) -> c_int {
panic::wrap(|| unsafe {
let id: Oid = Binding::from_raw(oid as *const _);
let name = CStr::from_ptr(name);
let name = name.to_bytes();
let payload = &mut *(payload as *mut TagForeachData<'_>);
let cb = &mut payload.cb;
let res = cb(id, name);
if res {
0
} else {
-1
}
})
.unwrap_or(-1)
}
#[cfg(test)]
mod tests {
#[test]
fn smoke() {
let (_td, repo) = crate::test::repo_init();
let head = repo.head().unwrap();
let id = head.target().unwrap();
assert!(repo.find_tag(id).is_err());
let obj = repo.find_object(id, None).unwrap();
let sig = repo.signature().unwrap();
let tag_id = repo.tag("foo", &obj, &sig, "msg", false).unwrap();
let mut tags = Vec::new();
repo.tag_foreach(|id, name| {
tags.push((id, String::from_utf8(name.into()).unwrap()));
true
})
.unwrap();
assert_eq!(tags[0].0, tag_id);
assert_eq!(tags[0].1, "refs/tags/foo");
}
}
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