colin/nix-files
1
0
Fork 1
Code Issues Pull Requests Projects Releases Wiki Activity

dyn-dns: fix to only react when the IP actually changes

Browse Source
This commit is contained in:
colin 2022-12-19 11:54:27 +00:00
parent 0b2faef989
commit 3122334a41
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
modules/services/dyn-dns.nix
View File

@ -45,8 +45,14 @@ in
restartTriggers = [(builtins.toJSON cfg)]; restartTriggers = [(builtins.toJSON cfg)];
serviceConfig.Type = "oneshot"; serviceConfig.Type = "oneshot";
script = '' script = ''
mkdir -p $(dirname "${cfg.ipPath}") mkdir -p $(dirname '${cfg.ipPath}')
${cfg.ipCmd} > "${cfg.ipPath}" newIp=$(${cfg.ipCmd})
# systemd path units are triggered on any file write action,
# regardless of content change. so only update the file if our IP *actually* changed
if [ "$newIp" != "$(cat '${cfg.ipPath}')" ]
then
echo "$newIp" > '${cfg.ipPath}'
fi
''; '';
}; };