fix: fix signed commit with initial branch

lua/fugit2/core/git_gpg.lua

@@ -3,6 +3,7 @@
 local uv = vim.uv or vim.loop
 local PlenaryJob = require "plenary.job"
 
+local git2 = require "fugit2.git2"
 local gpgme = require "fugit2.core.gpgme"
 local utils = require "fugit2.utils"
 
@@ -117,20 +118,38 @@ end
 ---@return integer err
 ---@return string err_msg
 local function create_commit_with_sign(repo, commit_content, gpg_sign, msg)
-  local commit_id, head, err
+  local commit_id, head, head_direct, err
   commit_id, err = repo:create_commit_with_signature(commit_content, gpg_sign, nil)
   if not commit_id then
     return nil, err, "Failed to create commit with sign"
   end
 
-  head, err = repo:head()
+  head, err = repo:reference_lookup "HEAD"
   if not head then
-    return nil, err, "Failed to get git head"
+    return nil, err, "Failed to lookup HEAD"
   end
 
-  _, err = head:set_target(commit_id, utils.lines_head(msg))
-  if err ~= 0 then
-    return nil, err, "Failed to set head to new commit"
+  head_direct, err = head:resolve()
+  if head_direct then
+    -- normal branch
+    _, err = head_direct:set_target(commit_id, "commit: " .. utils.lines_head(msg))
+    if err ~= 0 then
+      return nil, err, "Failed to set head to new commit"
+    end
+  elseif err == git2.GIT_ERROR.GIT_ENOTFOUND then
+    -- initial branch
+    local head_ref_name = head:symbolic_target()
+    if not head_ref_name then
+      return nil, err, "Failed to get HEAD sympolic target"
+    end
+
+    head, err = repo:create_reference(head_ref_name, commit_id, false, "commit (initial): " .. utils.lines_head(msg))
+    if err ~= 0 then
+      return nil, err, "Failed to create initial reference " .. head_ref_name
+    end
+  else
+    -- error
+    return nil, err, "Failed to get HEAD target"
   end
 
   return commit_id, 0, ""

lua/fugit2/git2.lua

@@ -1022,8 +1022,8 @@ function Reference:target()
   return nil, 0
 end
 
--- Conditionally creates a new reference
--- with the same name as the given reference.
+---Conditionally creates a new reference
+---with the same name as the given reference.
 ---@param oid GitObjectId
 ---@param message string
 ---@return GitReference?
@@ -1038,7 +1038,20 @@ function Reference:set_target(oid, message)
   return Reference.new(ref[0]), 0
 end
 
--- Recursively peel reference until object of the specified type is found.
+---Resolves a symbolic reference to a direct reference.
+---@return GitReference? ref git reference
+---@return GIT_ERROR err error code
+function Reference:resolve()
+  local ref = libgit2.git_reference_double_pointer()
+  local err = libgit2.C.git_reference_resolve(ref, self.ref)
+  if err ~= 0 then
+    return nil, err
+  end
+
+  return Reference.new(ref[0]), 0
+end
+
+---Recursively peel reference until object of the specified type is found.
 ---@param type GIT_OBJECT
 ---@return GitObject?
 ---@return integer Git Error code
@@ -2406,7 +2419,26 @@ function Repository:reference_name_to_id(refname)
   return ObjectId.borrow(oid), 0
 end
 
--- Gets commit from a reference.
+---Creates a new direct reference.
+---@param name string name of the reference.
+---@param oid GitObjectId object id pointed to by the reference.
+---@param is_force boolean is force.
+---@param log_message string line long message to be appended to the reflog.
+---@return GitReference? ref direct reference
+---@return GIT_ERROR err error code
+function Repository:create_reference(name, oid, is_force, log_message)
+  local git_ref = libgit2.git_reference_double_pointer()
+  local force = is_force and 1 or 0
+
+  local err = libgit2.C.git_reference_create(git_ref, self.repo, name, oid.oid, force, log_message)
+  if err ~= 0 then
+    return nil, err
+  end
+
+  return Reference.new(git_ref[0]), 0
+end
+
+---Gets commit from a reference.
 ---@param oid GitObjectId
 ---@return GitCommit?
 ---@return GIT_ERROR

lua/fugit2/libgit2.lua

@@ -500,6 +500,8 @@ ffi.cdef [[
   int git_reference_name_to_id(git_oid *out, git_repository *repo, const char *name);
   int git_reference_lookup(git_reference **out, git_repository *repo, const char *name);
   const char * git_reference_symbolic_target(const git_reference *ref);
+  int git_reference_create(git_reference **out, git_repository *repo, const char *name, const git_oid *id, int force, const char *log_message);
+  int git_reference_symbolic_create(git_reference **out, git_repository *repo, const char *name, const char *target, int force, const char *log_message);
 
   int git_revwalk_new(git_revwalk **walker, git_repository *repo);
   int git_revwalk_push(git_revwalk *walk, const git_oid *oid);

lua/fugit2/view/git_status.lua

@@ -1,6 +1,6 @@
 -- Fugit2 Git Status module
 
-local uv = vim.loop
+local uv = vim.uv or vim.loop
 
 local NuiLayout = require "nui.layout"
 local NuiLine = require "nui.line"