当比较git repo中的2个文件时，这个INDEX值是什么意思？(What does this INDEX value mean when comparing 2 files out of the git repo?)

 git diff --no-index可用于比较2个任意文件。 
 
 我试过如下： 
 
$ git diff --no-index -- /d/a.txt /d/b.txt
diff --git a/D:/a.txt b/D:/b.txt
index 7c4a013..01f02e3 100644
--- a/D:/a.txt
+++ b/D:/b.txt
@@ -1 +1 @@
-aaa
\ No newline at end of file
+bbb
\ No newline at end of file
 
 我想因为我正在比较git repo中的2个文件，所以应该与INDEX无关。 但index 7c4a013..01f02e3 100644是什么意思？ 

git diff --no-index can be used to compare 2 arbitrary files. 
 
I tried as below:
 
$ git diff --no-index -- /d/a.txt /d/b.txt
diff --git a/D:/a.txt b/D:/b.txt
index 7c4a013..01f02e3 100644
--- a/D:/a.txt
+++ b/D:/b.txt
@@ -1 +1 @@
-aaa
\ No newline at end of file
+bbb
\ No newline at end of file
 
I think since I am comparing 2 files out of the git repo, there should be nothing to do with the INDEX. But what does the index 7c4a013..01f02e3 100644 mean?

原文：https://stackoverflow.com/questions/37994800