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package main
import (
"errors"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"go.lindenii.runxiyu.org/lindenii-common/misc"
)
var (
err_getting_tag_reference = errors.New("error getting tag reference")
err_getting_branch_reference = errors.New("error getting branch reference")
err_getting_head = errors.New("error getting HEAD")
)
// get_ref_hash_from_type_and_name returns the hash of a reference given its
// type and name as supplied in URL queries.
func get_ref_hash_from_type_and_name(repo *git.Repository, ref_type, ref_name string) (ref_hash plumbing.Hash, ret_err error) {
switch ref_type {
case "":
head, err := repo.Head()
if err != nil {
ret_err = misc.Wrap_one_error(err_getting_head, err)
return
}
ref_hash = head.Hash()
case "commit":
ref_hash = plumbing.NewHash(ref_name)
case "branch":
ref, err := repo.Reference(plumbing.NewBranchReferenceName(ref_name), true)
if err != nil {
ret_err = misc.Wrap_one_error(err_getting_branch_reference, err)
return
}
ref_hash = ref.Hash()
case "tag":
ref, err := repo.Reference(plumbing.NewTagReferenceName(ref_name), true)
if err != nil {
ret_err = misc.Wrap_one_error(err_getting_tag_reference, err)
return
}
ref_hash = ref.Hash()
default:
panic("Invalid ref type " + ref_type)
}
return
}
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