Support ssh config.d, generating ~/.ssh/config from files in ~/.ssh/config.d/, preserving order

.bashrc

@@ -166,6 +166,21 @@ xterm*|rxvt*)
     ;;
 esac
 
+# SSH config merge
+#mkdir -p ~/.ssh/config.d/
+if [ -e ~/.ssh/config.d ]; then
+    #if find ~/.ssh/config.d -mindepth 1 -print -quit | grep -q .; then
+    if find ~/.ssh/config.d -print -quit | grep -q .; then
+        #newestconfig=$(ls -t ~/.ssh/config.d/ | head -1)
+        newestconfig=$(find ~/.ssh/config.d/* -printf '%T+ %p\n' | sort -r | head -n1 | awk '{print $2}')
+        if [ "$newestconfig" -nt ~/.ssh/config ]; then
+            [ -e ~/.ssh/config ] && mv ~/.ssh/config ~/.ssh/config.bak.$(date -Ins)
+            #cat ~/.ssh/config.d/* > ~/.ssh/config
+            find ~/.ssh/config.d/* -type f -print0 | sort -z | xargs -0 -n1 cat > ~/.ssh/config
+        fi
+    fi
+fi
+
 # Alias definitions.
 # You may want to put all your additions into a separate file like
 # ~/.bash_aliases, instead of adding them here directly.