(edit：交换了--quiet的退出代码，这会抑制输出）
git diff --quiet将导致命令设置退出代码，类似于正常的diff命令（如果存在差异）。

if ! git diff --quiet <commit1> <commit2> ; then
  echo "Different"
else
  echo "Not different"
fi

下面是一个例子：

#!/bin/bash

# Set the branch names
BRANCH1="master"
BRANCH2="my-feature-branch"

# Check if there are differences between the two branches
DIFFERENCES=$(git diff --name-only $BRANCH1 $BRANCH2)

# If there are differences, print a message
if [ -n "$DIFFERENCES" ]; then
  echo "There are differences between the $BRANCH1 and $BRANCH2 branches."
else
  echo "There are no differences between the $BRANCH1 and $BRANCH2 branches."
fi

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