Git: Check programmatically if anything is staged
For a Git script I'm writing, I'd like to have a programmatic way to check whether there is anything at all staged. ie I want a positive result if anything at all is staged, and negative if nothing is staged.
Bonus points: A way to programmatically check whether there is anything new in the working tree that can be staged.
You're looking for:
git diff --cached --quiet
(or replace --quiet with --exit-code if you still want output)
The short format output of the git status (also explained in helppage git status --help ) command gives an output that can be used in a programmatic way. From the git status --help helppage (somewhere at the bottom of the page in the "OUTPUT"-section, for my git version 2.8.1.windows.1):
In the short-format, the status of each path is shown as
XY PATH1 -> PATH2
where PATH1 is the path in the HEAD, and the " -> PATH2" part is shown only when PATH1 corresponds to a different path in the index/worktree (ie the file is renamed). The XY is a two-letter status code.
According to the same helppage:
For paths with merge conflicts, X and Y show the modification states of each side of the merge. For paths that do not have merge conflicts, X shows the status of the index, and Y shows the status of the work tree. For untracked paths, XY are ?? . Other status codes can be interpreted as follows:
' ' = unmodified
M = modified
A = added
D = deleted
R = renamed
C = copied
U = updated but unmerged
Ignored files are not listed, unless --ignored option is in effect, in which case XY are !! .
All this info about the values XY can take can also be found here. The short format is obtained by using git status -s . So
git status -s | grep "^[MADRCU]"
Should give you all entries that have been staged so far. You could add the -c flag to the grep to count the lines instead of printing them.
Bonus: anything new in the working tree that hasn't been staged yet (still untracked) should be found with:
git status -s | grep "^??"
Hope this helps.
Good luck!
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