Use ws-butler

At work I have to work with a lot of files that other people work on as well.
Other people don’t usually have their editor set up to remove all trailing
whitespace, and we’re not allowed to make a change that includes a lot of extra
whitespace changes[1]. So I end up having to revert a lot of whitespace changes
just before submitting. And if I then have to make more changes, for example
because something was pointed out in a code review, I have to do it again.

‘ws-butler’ promises that it will still prevent me from submitting extraneous
whitespace, but will not touch lines that I haven’t changed, so that would
prevent me from having to revert them all the time.

[1]: This is good, having a lot of whitespace changes can distract from or even
completely hide the actual change you’re trying to make.

1 files changed, 18 insertions, 0 deletions

diff --git a/test/integration/oni-core.bats b/test/integration/oni-core.bats
index adf6a4f..373d3ea 100755
--- a/test/integration/oni-core.bats
+++ b/test/integration/oni-core.bats
@@ -35,3 +35,21 @@
 
     [[ "$output" == *"t" ]]
 }
+
+@test "Starting Emacs diminishes ws-butler-global-mode" {
+    run emacs -batch -l package -f package-initialize -l subr-x \
+        -eval "(prin1 (string-empty-p (car (alist-get 'ws-butler-mode minor-mode-alist))))"
+
+    echo "$output"
+
+    [[ "$output" == *"t" ]]
+}
+
+@test "Starting Emacs turns on ws-butler-mode" {
+    run emacs -batch -l package -f package-initialize \
+        -eval "(prin1 (bound-and-true-p ws-butler-mode))"
+
+    echo "$output"
+
+    [[ "$output" == *"t" ]]
+}