From 9c9abeec69b08a5d3b9578ad91300f3a4fbce7b6 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 26 Aug 2018 06:35:32 +0200
Subject: zshrc: add self-update function for hosts without ct

---
 etc/.zshrc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/etc/.zshrc b/etc/.zshrc
index e61197f..7c5d1bc 100644
--- a/etc/.zshrc
+++ b/etc/.zshrc
@@ -219,6 +219,24 @@ function rwdo {
 	sudo mount -o remount,ro /
 }
 
+function update-zshrc {
+	local readonly_root=0
+	if [[ -L ~/.zshrc ]]; then
+		echo "zshrc is managed via caretaker -- please run 'ct f'"
+	else
+		if findmnt --raw --noheadings --output options --target ${HOME} | grep -qE '(^|,)ro($|,)'; then
+			readonly_root=1
+		fi
+		if (( readonly_root )); then
+			sudo mount -o remount,rw /
+		fi
+		wget -O ~/.zshrc.new https://git.finalrewind.org/zsh/plain/etc/.zshrc && mv ~/.zshrc.new ~/.zshrc
+		if (( readonly_root )); then
+			sudo mount -o remount,ro /
+		fi
+	fi
+}
+
 function world-readable {
 	chmod -R a+rX .
 }
-- 
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