From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Mon, 8 Apr 2024 10:14:47 +0000 (+0200)
Subject: docs: Add note on RuntimeBuildSources= to hacking guide
X-Git-Tag: v256-rc1~268
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e71b40fd0026c0884ca26eb4f0a9fbe4d9285cfa;p=thirdparty%2Fsystemd.git

docs: Add note on RuntimeBuildSources= to hacking guide
---

diff --git a/docs/HACKING.md b/docs/HACKING.md
index 8abb5e040f2..23ea7b10b16 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -82,6 +82,21 @@ to `mkosi.local.conf`:
 QemuFirmware=uefi
 ```
 
+To avoid having to build a new image all the time when iterating on a patch, add
+the following to `mkosi.local.conf`:
+
+```conf
+[Host]
+RuntimeBuildSources=yes
+```
+
+After enabling this setting, the source and build directories will be mounted to
+`/work/src` and `/work/build` respectively when booting the image as a container
+or virtual machine. To build the latest changes and re-install, run
+`meson install -C /work/build --only-changed` in the container or virtual machine
+and optionally restart the daemon(s) you're working on using
+`systemctl restart <units>` or `systemctl daemon-reexec` if you're working on pid1.
+
 Putting this all together, here's a series of commands for preparing a patch
 for systemd: