Git - finding the SHA1 of an individual file in the index

Question

I\'ve added a file to the \'index\' with:

git add myfile.java

How do I find out the SHA1 of this file?

Answer 1

You want the -s option to git ls-files. This gives you the mode and sha1 hash of the file in the index.

git ls-files -s myfile.java

Note that you do not want git hash-object as this gives you the sha1 id of the file in the working tree as it currently is, not of the file that you've added to the index. These will be different once you make changes to the working tree copy after the git add.