change how to .gitignore global

ref: https://docs.github.com/ja/get-started/getting-started-with-git/ignoring-files#configuring-ignored-files-for-all-repositories-on-your-computer

.gitconfig

@@ -3,7 +3,6 @@
 	name = Kiyo510
 [core]
 	editor = vim
-	excludesfile = ~/.gitignore_global
 	quotepath = false
 	autocrlf = input
 [merge]

git/sync.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -exu
+
+GIT_CONFIG_DIR="$HOME/.config/git"
+DATE=$(date +%s)
+
+echo "start sync git config.."
+if [ -L "${GIT_CONFIG_DIR}" -o -d "${GIT_CONFIG_DIR}" ]; then
+    mv "${GIT_CONFIG_DIR}" "${GIT_CONFIG_DIR}_$DATE"
+fi
+
+if [ ! -d "$GIT_CONFIG_DIR" ]; then
+    mkdir -p "$GIT_CONFIG_DIR"
+fi
+
+ ln -snfv "$HOME/dotfiles/git/ignore" "${GIT_CONFIG_DIR}/ignore"

setup.sh

@@ -46,6 +46,7 @@ source "$THIS_DIR/vscode/sync.sh"
 source "$THIS_DIR/alfred/sync.sh"
 source "$THIS_DIR/alacritty/sync.sh"
 source "$THIS_DIR/zsh/macos_defaults.sh"
+source "$THIS_DIR/git/sync.sh"
 
 # install z
 if ! command -v z >/dev/null 2>&1; then