1 files changed, 24 insertions, 2 deletions
diff --git a/sh/profile.d/editor.sh b/sh/profile.d/editor.sh
index ee0da70b..debb93b6 100644
--- a/sh/profile.d/editor.sh
+++ b/sh/profile.d/editor.sh
@@ -1,3 +1,25 @@
-# Set command-line editor
-EDITOR=ed
+# Ideally, we'd use plain old ed(1), but many Linux distributions don't install
+# it by default
+if command -v ed >/dev/null 2>&1 ; then
+    EDITOR=ed
+
+# Failing that, if the system's implementation of ex(1) looks like Vim and we
+# have exm(1df) in our $PATH, use the latter to work around Vim's ex mode
+# screen-clearing
+elif (
+    command -v ex >/dev/null 2>&1 || exit 1
+    command -v exm >/dev/null 2>&1 || exit 1
+    ver=$(ex --version 2>/dev/null | awk 'NR==1{print $1;exit}')
+    case $ver in
+        (VIM) exit 0 ;;
+        (*)   exit 1 ;;
+    esac
+) >/dev/null 2>&1 ; then
+    EDITOR=exm
+
+# Otherwise, we can just call ex(1) directly
+else
+    EDITOR=ex
+fi
+
 export EDITOR