Initial test
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emacssurvey.teosaur.net
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reverse_proxy localhost:8000
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[Unit]
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Description=Genie app
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After=network.target network-online.target
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Requires=network-online.target
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[Service]
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Type=simple
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User=genie
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Group=genie
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ExecStart=/opt/emacs-survey/bin/server
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Environment="GENIE_ENV=prod"
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[Install]
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WantedBy=multi-user.target
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#+title: Setup
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#+property: header-args :comments no
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#+property: header-args:sh :tangle yes :shebang "#!/usr/bin/env sh" :eval no
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We could do something fancy like a NixOS flake, but for the EmacsSurvey server I
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think a simple Debian machine with a setup script should do the trick. Let's
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just work out a setup script to get everything up and running.
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The idea is that this repository can be cloned/updated anywhere on the machine
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and =sudo setup.sh= will do the rest. In fact, here's a snippet to do exactly
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that:
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#+begin_src sh :tangle no
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git clone https://git.tecosaur.net/tec/emacs-survey-server.git /tmp/emacs-survey-server
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/tmp/emacs-survey-server/setup.sh
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#+end_src
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* Installing software
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** Caddy web server
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#+begin_src sh
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if ! rpm -q caddy > /dev/null; then
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printf "\e[1;34mInstalling Caddy\e[m"
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# Taken from <https://caddyserver.com/docs/install#debian-ubuntu-raspbian>
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sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
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curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
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curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
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sudo apt update
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sudo apt install caddy
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fi
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#+end_src
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There are two notable extras that come with the Caddy software itself here:
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1. A systemd service automatically started that loads =/etc/caddy/Caddyfile=.
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2. The =caddy= user and =caddy= group.
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** Julia
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First, we specify the Julia version we want and hope that the relevant paths
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continue to be predictable.
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#+begin_src sh
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JULIA_VERSION="1.8.2"
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#+end_src
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If either the =julia= command does not exist, or =julia --version= does not match
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the expected output, then we will install Julia in =/opt/julia= and symlink the
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binary into =/usr/bin=.
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#+begin_src sh
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if ! command -v julia > /dev/null || [ ! $(julia --version) = "julia version $JULIA_VERSION" ]; then
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printf "\e[1;34mInstalling Julia\e[m"
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pushd /tmp > /dev/null
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# Following <https://julialang.org/downloads/platform/>
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wget "https://julialang-s3.julialang.org/bin/linux/x64/${JULIA_VERSION%.*}/julia-$JULIA_VERSION-linux-x86_64.tar.gz"
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mkdir -p "/opt/julia/"
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tar zxf "julia-$JULIA_VERSION-linux-x86_64.tar.gz" --directory=/opt/julia
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ln -sf "/opt/julia/julia-$JULIA_VERSION/bin/julia" /usr/bin/julia
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popd > /dev/null
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fi
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#+end_src
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* Copying over relevant files
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Before starting to do this, we will obtain the path to the folder of the script,
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so we can grab files relative to the root of this repository.
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#+begin_src sh
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SETUPDIR=$(dirname "$(readlink --canonicalize-existing "$0")")
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#+end_src
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** Caddy Config
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With Caddy, we just need to redirect to Genie for now.
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#+begin_src prog :tangle Caddyfile
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emacssurvey.teosaur.net
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reverse_proxy localhost:8000
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#+end_src
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And link this config file
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#+begin_src sh
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cp -f "$SETUPDIR/Caddyfile" "/etc/caddy/Caddyfile"
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#+end_src
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** Emacs Survey
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Before we start copying files, we want to make sure these files are owned by the
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=genie= user, and so me must first ensure that the user exists.
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#+begin_src sh
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if ! id genie >/dev/null; then
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groupadd -f genie
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useradd -r -g genie -m -d /var/lib/genie genie
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fi
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#+end_src
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This is actually a separate repo, so we need to ensure it exists, and update it
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if it does.
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#+begin_src sh
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if [ -d /opt/emacs-survey ]; then
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pushd /opt/emacs-survey > /dev/null
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sudo -u genie git pull origin main
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popd > /dev/null
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else
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mkdir -p /opt/emacs-survey
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chown genie:genie /opt/emacs-survey
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sudo -u genie git clone https://git.tecosaur.net/tec/emacs-survey /opt/emacs-survey
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fi
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#+end_src
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Then lets make sure that the packages are up to date.
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#+begin_src sh
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sudo -u genie julia --project=/opt/emacs-survey -e 'using Pkg; Pkg.instantiate()'
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#+end_src
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* Genie service
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To actually run the survey, we'll use a systemd service.
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#+begin_src systemd :tangle genie-app.service
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[Unit]
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Description=Genie app
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After=network.target network-online.target
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Requires=network-online.target
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[Service]
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Type=simple
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User=genie
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Group=genie
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ExecStart=/opt/emacs-survey/bin/server
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Environment="GENIE_ENV=prod"
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[Install]
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WantedBy=multi-user.target
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#+end_src
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Then we need to put this is the systemd folder, and make sure it is aware of the
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latest version of the service.
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#+begin_src sh
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cp -f "$SETUPDIR/genie-app.service" /etc/systemd/system/
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systemctl daemon-reload
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#+end_src
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To get this up and running, all one has to do is execute the following:
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#+begin_src sh :tangle no
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systemctl enable --now genie-app.service
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#+end_src
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#!/usr/bin/env sh
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if ! rpm -q caddy > /dev/null; then
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printf "\e[1;34mInstalling Caddy\e[m"
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# Taken from <https://caddyserver.com/docs/install#debian-ubuntu-raspbian>
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sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
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curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
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curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
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sudo apt update
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sudo apt install caddy
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fi
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JULIA_VERSION="1.8.2"
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if ! command -v julia > /dev/null || [ ! $(julia --version) = "julia version $JULIA_VERSION" ]; then
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printf "\e[1;34mInstalling Julia\e[m"
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pushd /tmp > /dev/null
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# Following <https://julialang.org/downloads/platform/>
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wget "https://julialang-s3.julialang.org/bin/linux/x64/${JULIA_VERSION%.*}/julia-$JULIA_VERSION-linux-x86_64.tar.gz"
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mkdir -p "/opt/julia/"
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tar zxf "julia-$JULIA_VERSION-linux-x86_64.tar.gz" --directory=/opt/julia
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ln -sf "/opt/julia/julia-$JULIA_VERSION/bin/julia" /usr/bin/julia
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popd > /dev/null
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fi
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SETUPDIR=$(dirname "$(readlink --canonicalize-existing "$0")")
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ln -sf "$SETUPDIR/Caddyfile" "/etc/caddy/Caddyfile"
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if ! id genie >/dev/null; then
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groupadd -f genie
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useradd -r -g genie -m -d /var/lib/genie genie
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fi
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if [ -d /opt/emacs-survey ]; then
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pushd /opt/emacs-survey > /dev/null
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sudo -u genie git pull origin main
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popd > /dev/null
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else
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mkdir -p /opt/emacs-survey
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chown genie:genie /opt/emacs-survey
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sudo -u genie git clone https://git.tecosaur.net/tec/emacs-survey /opt/emacs-survey
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fi
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sudo -u genie julia --project=/opt/emacs-survey -e 'using Pkg; Pkg.instantiate()'
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ln -sf "$SETUPDIR/genie-app.service" /etc/systemd/system/
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systemctl daemon-reload
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