问题:

Is there a way to download the diffs of the files present in staging area in git other than git stash. I would probably want a way to download the diffs as a tar ball?

回答1:

Since git archive works only with a treeish, you would need to:

make a commit out of your current index
export those files as an archive, as mentioned in "Export only modified and added files with folder structure in Git"
git reset (to restore the index)

That is:

git add .
git commit -m "tmp commit for export"
git archive -o patch.zip @ $(git diff --name-only @~..@)
git reset @~

Note: if you have spaces in the pathnames of those files, you might need instead:

git diff -z --name-only @~ @ | xargs -0 git archive -o patch.zip @

回答2:

Assuming that:

Your work is already placed in staging area with git add <filename>
You don't want to create temporary commits just for the sake of saving the work
You want one diff/patch per versioned file

for f in $(git diff --cached --name-only); do \
   p="$f.patch"; git diff --cached -- "$f" > "$p" && zip p.zip "$p" && rm "$p"; \
done
  adding: file-1.c.patch (deflated 36%)
  adding: file-2.c.patch (deflated 44%)

Viewing the archive contents:

unzip -l p.zip 
Archive:  p.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
      259  2016-08-07 19:24   file-1.c.patch
      347  2016-08-07 19:24   file-2.c.patch
---------                     -------
      606                     2 files