Can git-crypt filter cowork with eol in .gitattributes?

[hansbobby]

Hello,

I just started to use git-crypt to protect some of our config files.
One thing we noticed is that setting .gitattributes filter seems to interfere with text=auto eol=lf attributes.
How can I enforce the git-crypt protected secrets to use LF as EOL?

In my case, here's how my .gitattributes looks like:

*.enc text=auto eol=lf filter=git-crypt diff=git-crypt
*.md text=auto eol=lf

While staging two CRLF files (a *.md file and a *.enc secret), the former has its CRLF normalized to LF while the latter is not.

$ git add CRLF.md secret.enc 
warning: CRLF will be replaced by LF in CRLF.md.
The file will have its original line endings in your working directory

$ git diff --cached
diff --git a/CRLF.md b/CRLF.md
new file mode 100644
index 0000000..b27affe
--- /dev/null
+++ b/CRLF.md
@@ -0,0 +1,2 @@
+# CRLF Test
+This file is edited in Vim with :e ++ff=dos.
diff --git a/secret.enc b/secret.enc
new file mode 100644
index 0000000..2b42513
--- /dev/null
+++ b/secret.enc
@@ -0,0 +1,3 @@
+# Secret CRLF Test^M
+username=demo^M
+password=pa$$30rd^M

Ideally, we would like to have secrets such as secret.enc normalized to LF before git-crypt clean (encrypt) them.
Yet we can not figure out how to.