doc: update git.md (jaywcjlove#216)

docs/git.md

@@ -960,6 +960,41 @@ Host github.com
 ```
 <!--rehype:className=wrap-text-->
 
+git 代码统计
+---
+
+### 查看 git 上的个人代码量
+
+- `username` 需要改成自己的
+
+```bash
+git log --author="username" --pretty=tformat: --numstat | awk \
+'{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' -
+```
+
+### 统计每个人增删行数
+
+```bash
+git log --format='%aN' | sort -u |\
+  while read name; do echo -en "$name\t";\
+  git log --author="$name" --pretty=tformat: --numstat | awk \
+  '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' -; done
+```
+
+### 查看仓库提交者排名
+
+这里是排名前十，也可以更改排名
+
+```bash
+git log --pretty='%aN' | sort | uniq -c | sort -k1 -n -r | head -n 10
+```
+
+### 提交数统计
+
+```bash
+git log --oneline | wc -l
+```
+
 Conventional Commmits
 ----