show output of sysrescue-initialize.py on the boot console

show it immediately, not when the buffer is full. This also yields proper
timestamps in the journal in case some part of it takes longer to complete.

airootfs/etc/systemd/scripts/sysrescue-initialize.py

@@ -9,6 +9,10 @@ import os
 import sys
 import re
 import tempfile
+import functools
+
+# flush stdout buffer after each print call: immediately show the user what is going on
+print = functools.partial(print, flush=True)
 
 # pythons os.symlink bails when a file already exists, this function also handles overwrites
 def symlink_overwrite(target, link_file):
@@ -224,7 +228,7 @@ if 'sysconfig' in config and 'ca-trust' in config['sysconfig'] and config['sysco
 
 if late_load_srm != "":
     print(f"====> Late-loading SystemRescueModule (SRM) ...")
-    subprocess.run(["/usr/share/sysrescue/bin/load-srm", late_load_srm])
+    subprocess.run(["/usr/share/sysrescue/bin/load-srm", late_load_srm], stdout=None, stderr=None)
     # the SRM could contain changes to systemd units -> let them take effect
     subprocess.run(["/usr/bin/systemctl", "daemon-reload"])
     # trigger start of multi-user.target: the SRM could have added something to it's "Wants"

airootfs/etc/systemd/system/sysrescue-initialize.service

@@ -7,6 +7,7 @@ Wants=getty-pre.target
 Type=oneshot
 ExecStart=/etc/systemd/scripts/sysrescue-initialize.py
 RemainAfterExit=true
+StandardOutput=journal+console
 
 [Install]
 WantedBy=multi-user.target