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home-manager/modules/systemd-activate.sh
Adam Dinwoodie 607f969f5d
systemd: don't try to restart templates
If the user has template services in their systemd configuration, these
can't be restarted, and will produces warnings during the activation
phase.  Avoid those warnings by skipping any uninstantiated templates
when looking for services to start or stop.
2024-06-26 18:14:48 +02:00

119 lines
2.8 KiB
Bash

#!/usr/bin/env bash
function isStartable() {
local service="$1"
[[ $(systemctl --user show -p RefuseManualStart "$service") == *=no ]]
}
function isStoppable() {
if [[ -v oldGenPath ]] ; then
local service="$1"
[[ $(systemctl --user show -p RefuseManualStop "$service") == *=no ]]
fi
}
function systemdPostReload() {
local workDir
workDir="$(mktemp -d)"
if [[ -v oldGenPath ]] ; then
local oldUserServicePath="$oldGenPath/home-files/.config/systemd/user"
fi
local newUserServicePath="$newGenPath/home-files/.config/systemd/user"
local oldServiceFiles="$workDir/old-files"
local newServiceFiles="$workDir/new-files"
local servicesDiffFile="$workDir/diff-files"
if [[ ! (-v oldUserServicePath && -d "$oldUserServicePath") \
&& ! -d "$newUserServicePath" ]]; then
return
fi
if [[ ! (-v oldUserServicePath && -d "$oldUserServicePath") ]]; then
touch "$oldServiceFiles"
else
find "$oldUserServicePath" \
-maxdepth 1 -name '*.service' \! -name '*@.service' -exec basename '{}' ';' \
| sort \
> "$oldServiceFiles"
fi
if [[ ! -d "$newUserServicePath" ]]; then
touch "$newServiceFiles"
else
find "$newUserServicePath" \
-maxdepth 1 -name '*.service' \! -name '*@.service' -exec basename '{}' ';' \
| sort \
> "$newServiceFiles"
fi
diff \
--new-line-format='+%L' \
--old-line-format='-%L' \
--unchanged-line-format=' %L' \
"$oldServiceFiles" "$newServiceFiles" \
> "$servicesDiffFile" || true
local -a maybeRestart=( $(grep '^ ' "$servicesDiffFile" | cut -c2-) )
local -a maybeStop=( $(grep '^-' "$servicesDiffFile" | cut -c2-) )
local -a maybeStart=( $(grep '^+' "$servicesDiffFile" | cut -c2-) )
local -a toRestart=( )
local -a toStop=( )
local -a toStart=( )
for f in "${maybeRestart[@]}" ; do
if isStoppable "$f" \
&& isStartable "$f" \
&& systemctl --quiet --user is-active "$f" \
&& ! cmp --quiet \
"$oldUserServicePath/$f" \
"$newUserServicePath/$f" ; then
toRestart+=("$f")
fi
done
for f in "${maybeStop[@]}" ; do
if isStoppable "$f" ; then
toStop+=("$f")
fi
done
for f in "${maybeStart[@]}" ; do
if isStartable "$f" ; then
toStart+=("$f")
fi
done
rm -r "$workDir"
local sugg=""
if [[ -n "${toRestart[@]}" ]] ; then
sugg="${sugg}systemctl --user restart ${toRestart[@]}\n"
fi
if [[ -n "${toStop[@]}" ]] ; then
sugg="${sugg}systemctl --user stop ${toStop[@]}\n"
fi
if [[ -n "${toStart[@]}" ]] ; then
sugg="${sugg}systemctl --user start ${toStart[@]}\n"
fi
if [[ -n "$sugg" ]] ; then
echo "Suggested commands:"
echo -n -e "$sugg"
fi
}
oldGenPath="$1"
newGenPath="$2"
if [[ -v DRY_RUN ]]; then
echo systemctl --user daemon-reload
else
systemctl --user daemon-reload
fi
systemdPostReload