No error

Generic error

Requested object could not be found

Object exists preventing operation

More than one object matches

Output buffer too short to hold data

GIT_EUSER is a special error that is never generated by libgit2 code. You can return it from a callback (e.g to stop an iteration) to know that it was generated by the callback and not by libgit2.

Operation not allowed on bare repository

HEAD refers to branch with no commits

Merge in progress prevented operation

Reference was not fast-forwardable

Name/ref spec was not in a valid format

Checkout conflicts prevented operation

Lock file prevented operation

Reference value does not match expected

Authentication error

Server certificate is invalid

Patch/merge has already been applied

The requested peel operation is not possible

Unexpected EOF

Invalid operation or input

Uncommitted changes in index prevented operation

The operation is not valid for a directory

A merge conflict exists and cannot continue

A user-configured callback refused to act

Signals end of iteration with iterator

Internal only

Hashsum mismatch in object

Unsaved changes in the index would be overwritten

Patch application failed