Add function and alias to help code review

Add following aliases:

- gmf: Show the changed files from base branch to current branch
- gmfn: Similar to gmfn, but only contains the name of changed files

Add a function:

- greview: Open all changed files in vim. Map <leader>gd to show the
  diff between base branch and current branch.

1 files changed, 18 insertions, 0 deletions

diff --git a/.functions b/.functions
index 9390af8..879804c 100644
--- a/.functions
+++ b/.functions
@@ -9,3 +9,21 @@ open () {
         echo "No usable program is found"
     fi
 }
+
+greview () {
+    usage='usage: greview <base_branch>'
+    if [ $# -lt 1 ]; then
+        echo $usage
+        return
+    fi
+
+    base_branch=$1
+    # vim -p $(git diff --merge-base --name-only $base_branch) \
+    #     "+tabdo Gvdiff $base_branch" \
+    #     "+nmap <C-j> :tabnext<CR>" \
+    #     "+nmap <C-k> :tabpreivous<CR>"
+
+    vim $(git diff --merge-base --name-only $base_branch) \
+        "+nmap <leader>gd :Gvdiffsplit $base_branch<CR>" 
+
+}