#+TITLE: =systemd= services and timers
#+SETUPFILE: ./setup/org-setup-file.org

https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units

* =braingit= - Automatic commit and push new brain pages
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/braingit.service
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Sync Brain Website everyday
RefuseManualStart=no
RefuseManualStop=yes

[Service]
Type=oneshot
ExecStart=%h/.local/bin/brain_git_push
#+END_SRC

** Timer
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/braingit.timer
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Sync Brain Website everyday
RefuseManualStart=no
RefuseManualStop=no
Wants=network-online.target
After=network-online.target

[Timer]
OnCalendar=*-*-* 16:00:00
Persistent=true
Unit=braingit.service

[Install]
WantedBy=default.target
#+END_SRC

** Script
:PROPERTIES:
:header-args:  :tangle ~/.local/bin/brain_git_push
:header-args+: :comments both :mkdirp yes
:header-args+: :shebang "#!/usr/bin/env bash"
:END:

#+begin_src bash
cd ~/Cloud/brain-website/

if [[ ! -z $(git status -s content/) ]]
then
    git add content static && \
        git commit -m "Update Content - $(date +%F)" && \
        git push
    exit
fi
#+end_src
* =checkmail= - Check new mails
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/checkmail.service
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Check new mails
RefuseManualStart=no
RefuseManualStop=yes

[Service]
Type=oneshot
ExecStart=%h/.local/bin/checkmail -q
#+END_SRC

** Timer
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/checkmail.timer
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Check Mail every x minutes
RefuseManualStart=no
RefuseManualStop=no
Wants=network-online.target
After=network-online.target
Requires=checkmail.service

[Timer]
Persistent=false
OnBootSec=2min
OnUnitActiveSec=5min
AccuracySec=2min
Unit=checkmail.service

[Install]
WantedBy=default.target
#+END_SRC

** Script
:PROPERTIES:
:header-args:  :tangle ~/.local/bin/checkmail
:header-args+: :comments both :mkdirp yes
:header-args+: :shebang "#!/usr/bin/env bash"
:END:

#+begin_src bash
while [ -n "$1" ]; do # while loop starts
    case "$1" in
    -a) opt_all='--all' ;; # Check All inboxes
    -v) opt_verbose='--verbose' ;; # Verbose
    -q) opt_quiet='--quiet' ;; # Quiet
    ,*) echo "Option $1 not recognized" ;; # In case you typed a different option
    esac
    shift
done


# =============================================================
# Count number of mails
gmail_old="$(ls ~/.mail/gmail/Inbox/new | wc -l)"
esrf_old="$(ls ~/.mail/esrf/Inbox/new | wc -l)"
ulg_old="$(ls ~/.mail/ulg/Inbox/new | wc -l)"
uliege_old="$(ls ~/.mail/uliege/Inbox/new | wc -l)"
# =============================================================

# =============================================================
# Retreive mails
mbsync $opt_all $opt_verbose gmail-Home esrf-Home ulg-Home uliege-Home 2>/tmp/mbsync.log
# =============================================================

# =============================================================
# Count number of mails
gmail_new="$(ls ~/.mail/gmail/Inbox/new | wc -l)"
esrf_new="$(ls ~/.mail/esrf/Inbox/new | wc -l)"
ulg_new="$(ls ~/.mail/ulg/Inbox/new | wc -l)"
uliege_new="$(ls ~/.mail/uliege/Inbox/new | wc -l)"
# =============================================================

# =============================================================
# Total Number of new mails since last checking
new="$(($gmail_new+$esrf_new+$ulg_new+$uliege_new))"
old="$(($gmail_old+$esrf_old+$ulg_old+$uliege_old))"
# =============================================================

# =============================================================
# Notification
if [ "$new" -gt 0 ]; then
  notify-send --hint=string:x-dunst-stack-tag:fV84ivMi 'Mails ' "$new new mail(s)"
fi
# =============================================================

# =============================================================
# Indexation and Tags
if pgrep -f 'mu server'; then
    emacsclient --eval '(mu4e-update-index)'
else
    mu index -m ~/.mail $opt_verbose $opt_quiet
fi
# =============================================================
#+end_src

* =syncmail= - Synchronize all mails
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/syncmail.service
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Sync all mails
RefuseManualStart=no
RefuseManualStop=yes

[Service]
Type=oneshot
ExecStart=%h/.local/bin/checkmail -a -q
#+END_SRC

** Timer
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/syncmail.timer
:header-args+: :comments both :mkdirp yes
:END:

#+BEGIN_SRC conf
[Unit]
Description=Sync All Mails every x hours
RefuseManualStart=no
RefuseManualStop=no
Wants=network-online.target
After=network-online.target
Requires=syncmail.service

[Timer]
Persistent=false
OnBootSec=30min
OnUnitActiveSec=300min
AccuracySec=10min
Unit=syncmail.service

[Install]
WantedBy=default.target
#+END_SRC

* =vdirsyncer= - Synchronize calendar and contacts
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/vdirsyncer.service
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=Synchronize calendars and contacts
Documentation=https://vdirsyncer.readthedocs.org/
Wants=network-online.target
After=network-online.target

[Service]
ExecStart=/home/thomas/.local/bin/vdirsyncer --verbosity "ERROR" sync
Type=oneshot
#+end_src

** Timer
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/vdirsyncer.timer
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=Synchronize vdirs

[Timer]
OnBootSec=5m
OnUnitActiveSec=15m
AccuracySec=5m

[Install]
WantedBy=timers.target
#+end_src

* TODO =ssh-agent= - SSH Agent
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/ssh-agent.service
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=SSH key agent

[Service]
Type=simple
Environment=SSH_AUTH_SOCK=%t/ssh-agent.socket
ExecStart=/usr/bin/ssh-agent -D -a $SSH_AUTH_SOCK

[Install]
WantedBy=default.target
#+end_src

* TODO =emacs= - Emacs
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/emacs.service
:header-args+: :comments both :mkdirp yes
:END:
#+begin_src conf
[Unit]
Description=Emacs text editor
Documentation=info:emacs man:emacs(1) https://gnu.org/software/emacs/

[Service]
Type=simple
ExecStart=/usr/bin/emacs --fg-daemon
ExecStop=/usr/bin/emacsclient --eval "(kill-emacs)"
Environment=SSH_AUTH_SOCK=%t/keyring/ssh
Restart=on-failure

[Install]
WantedBy=default.target
#+end_src

* TODO =trash-empty= - Empty the trash for files older than 30 days
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/trash-empty.service
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=Empty the trash for files older than 30 days
Documentation=https://github.com/andreafrancia/trash-cli

[Service]
ExecStart=/home/thomas/.local/bin/trash-empty 30
Type=oneshot
#+end_src

** Timer
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/trash-empty.timer
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=Empty trash

[Timer]
OnCalendar=*-*-* 16:00:00
Persistent=true
Unit=trash-empty

[Install]
WantedBy=timers.target
#+end_src
* =syncthing=
** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/syncthing.service
:header-args+: :comments both :mkdirp yes
:END:
#+begin_src conf
[Unit]
Description=Syncthing - Open Source Continuous File Synchronization for %I
Documentation=man:syncthing(1)
After=network.target

[Service]
Environment="all_proxy=socks5://localhost:8080"
ExecStart=/usr/bin/syncthing -no-browser -gui-address="0.0.0.0:8384" -no-restart -logflags=0
Restart=on-failure
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

[Install]
WantedBy=default.target
#+end_src

* =homelab-tunnel= - SSH Tunnel
Useful to bypass firewalls.
This can we used on the browser:
- for =qutebrowser=, use =:set content.proxy socks5://localhost:8080= (can setup a shortcut for that)

This is also used for Syncthing.

** Service
:PROPERTIES:
:header-args: :tangle ~/.config/systemd/user/homelab-tunnel.service
:header-args+: :comments both :mkdirp yes
:END:

#+begin_src conf
[Unit]
Description=Setup a secure tunnel with homelab
After=network.target

[Service]
ExecStart=/usr/bin/ssh -o ServerAliveInterval=60 -o ExitOnForwardFailure=yes -D 8080 -q -N -T homelab

# Restart every >2 seconds to avoid StartLimitInterval failure
RestartSec=5
Restart=always

[Install]
WantedBy=default.target
#+end_src