313 lines
8.9 KiB
Nix
313 lines
8.9 KiB
Nix
{
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config,
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lib,
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pkgs,
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pkgs-unstable,
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...
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}:
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let
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cfg = config.alisceon.blogbox;
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user = config.users.users.${cfg.user};
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repoDir = "${user.home}/${cfg.repoDirectoryName}";
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outputDir = toString cfg.outputDir;
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outputParent = dirOf outputDir;
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caddyfile = pkgs.writeText "blogbox-Caddyfile" ''
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{$BLOGBOX_DOMAIN} {
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encode zstd gzip
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root * ${outputDir}
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file_server
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}
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'';
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publishSite = pkgs.writeShellApplication {
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name = "blogbox-publish-site";
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runtimeInputs = [
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pkgs.coreutils
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pkgs.git
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pkgs.gnugrep
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pkgs-unstable.hugo
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];
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text = ''
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repo_dir="''${BLOGBOX_REPO_DIR:-${repoDir}}"
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output_dir="''${BLOGBOX_OUTPUT_DIR:-${outputDir}}"
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hugo_args="''${BLOGBOX_HUGO_ARGS:-}"
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if [ ! -d "$repo_dir/.git" ]; then
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echo "Skipping blog publish: $repo_dir is not an initialized git repository"
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exit 0
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fi
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cd "$repo_dir"
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old_rev="$(git rev-parse HEAD 2>/dev/null || true)"
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if [ -z "$old_rev" ]; then
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echo "Skipping blog publish: unable to resolve HEAD in $repo_dir"
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exit 0
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fi
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if ! git remote get-url origin >/dev/null 2>&1; then
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echo "Skipping blog publish: $repo_dir has no origin remote"
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exit 0
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fi
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git fetch --prune --tags origin
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upstream="$(git rev-parse --abbrev-ref --symbolic-full-name '@{u}' 2>/dev/null || true)"
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if [ -n "$upstream" ]; then
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git merge --ff-only "$upstream"
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else
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git pull --ff-only
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fi
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new_rev="$(git rev-parse HEAD)"
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built_rev_file="$output_dir/.blogbox-built-rev"
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if [ -f "$built_rev_file" ] && [ "$old_rev" = "$new_rev" ] && grep -qxF "$new_rev" "$built_rev_file"; then
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echo "No blog repository updates since $new_rev; skipping Hugo build"
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exit 0
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fi
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output_parent="$(dirname "$output_dir")"
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mkdir -p "$output_parent"
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build_dir="$(mktemp -d "$output_parent/.hugo-build.XXXXXX")"
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trap 'rm -rf "$build_dir"' EXIT
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# shellcheck disable=SC2086
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hugo --source "$repo_dir" --destination "$build_dir/public" --cleanDestinationDir $hugo_args
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printf '%s\n' "$new_rev" > "$build_dir/public/.blogbox-built-rev"
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rm -rf "$output_dir.previous"
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if [ -d "$output_dir" ]; then
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mv "$output_dir" "$output_dir.previous"
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fi
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mv "$build_dir/public" "$output_dir"
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rm -rf "$output_dir.previous"
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trap - EXIT
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rm -rf "$build_dir"
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echo "Published blog revision $new_rev to $output_dir"
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'';
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};
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updateNamecheap = pkgs.writeShellApplication {
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name = "blogbox-namecheap-ddns";
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runtimeInputs = [
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pkgs.curl
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pkgs.gnugrep
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];
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text = ''
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domain="''${NAMECHEAP_DOMAIN:-''${BLOGBOX_DOMAIN:-}}"
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host="''${NAMECHEAP_HOST:-@}"
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password="''${NAMECHEAP_DDNS_PASSWORD:-''${NAMECHEAP_PASSWORD:-}}"
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if [ -z "$domain" ] || [ -z "$password" ]; then
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echo "Skipping Namecheap DDNS: BLOGBOX_DOMAIN/NAMECHEAP_DOMAIN or NAMECHEAP_DDNS_PASSWORD is not configured"
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exit 0
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fi
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ip="''${NAMECHEAP_IP:-}"
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if [ -z "$ip" ]; then
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ip_url="''${NAMECHEAP_IP_URL:-https://dynamicdns.park-your-domain.com/getip}"
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ip="$(curl --fail --silent --show-error --max-time 15 "$ip_url")"
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fi
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response="$(
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curl --fail --silent --show-error --get "https://dynamicdns.park-your-domain.com/update" \
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--data-urlencode "host=$host" \
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--data-urlencode "domain=$domain" \
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--data-urlencode "password=$password" \
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--data-urlencode "ip=$ip"
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)"
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printf '%s\n' "$response"
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if printf '%s\n' "$response" | grep -qiE '<ErrCount>0</ErrCount>|<Done>true</Done>'; then
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exit 0
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fi
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echo "Namecheap DDNS response did not indicate success"
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exit 1
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'';
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};
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in
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{
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options.alisceon.blogbox = {
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enable = lib.mkEnableOption "blogbox static site publishing";
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user = lib.mkOption {
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type = lib.types.str;
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default = "alisceon";
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description = "User that owns and updates the blog git repository.";
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};
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group = lib.mkOption {
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type = lib.types.str;
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default = "users";
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description = "Group for blogbox writable state.";
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};
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repoDirectoryName = lib.mkOption {
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type = lib.types.str;
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default = "blogbox-site";
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description = "Directory name under the user's home where the runtime git repository lives.";
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};
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outputDir = lib.mkOption {
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type = lib.types.path;
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default = "/var/lib/blogbox/public";
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description = "Stable directory served by Caddy and replaced after successful Hugo builds.";
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};
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environmentFile = lib.mkOption {
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type = lib.types.path;
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default = "/etc/blogbox/blogbox.env";
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description = "Runtime environment file for non-secret domain and repository settings.";
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};
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ddnsEnvironmentFile = lib.mkOption {
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type = lib.types.path;
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default = "/etc/blogbox/namecheap.env";
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description = "Runtime environment file for Namecheap dynamic DNS credentials.";
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};
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publishInterval = lib.mkOption {
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type = lib.types.str;
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default = "2min";
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description = "Interval for git pull and Hugo publish attempts.";
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};
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ddnsInterval = lib.mkOption {
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type = lib.types.str;
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default = "5min";
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description = "Interval for Namecheap dynamic DNS updates.";
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};
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};
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config = lib.mkIf cfg.enable {
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networking.firewall.allowedTCPPorts = [
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80
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443
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];
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environment.etc."blogbox/blogbox.env.example".text = ''
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# Required for HTTPS virtual hosting.
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BLOGBOX_DOMAIN=example.com
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# Optional. Defaults to /home/${cfg.user}/${cfg.repoDirectoryName}.
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# BLOGBOX_REPO_DIR=/home/${cfg.user}/${cfg.repoDirectoryName}
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# Optional. Defaults to ${outputDir}.
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# BLOGBOX_OUTPUT_DIR=${outputDir}
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# Optional extra flags passed to hugo. Keep this shell-word-safe.
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# BLOGBOX_HUGO_ARGS=--minify
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'';
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environment.etc."blogbox/namecheap.env.example".text = ''
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# Required for Namecheap DDNS.
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# NAMECHEAP_DOMAIN defaults to BLOGBOX_DOMAIN from blogbox.env when omitted.
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# NAMECHEAP_DOMAIN=example.com
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NAMECHEAP_HOST=@
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NAMECHEAP_DDNS_PASSWORD=change-me
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# Optional. If unset, the updater asks Namecheap for the current public IP.
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# NAMECHEAP_IP=203.0.113.10
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'';
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services.caddy = {
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enable = true;
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adapter = "caddyfile";
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configFile = caddyfile;
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environmentFile = cfg.environmentFile;
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};
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systemd.tmpfiles.rules = [
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"d /etc/blogbox 0750 root root -"
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"d ${outputParent} 0755 ${cfg.user} ${cfg.group} -"
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"d ${outputDir} 0755 ${cfg.user} ${cfg.group} -"
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];
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systemd.services = {
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caddy.unitConfig.ConditionPathExists = cfg.environmentFile;
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blogbox-publish-site = {
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description = "Pull and publish the blogbox Hugo site";
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "oneshot";
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User = cfg.user;
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Group = cfg.group;
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EnvironmentFile = [ "-${toString cfg.environmentFile}" ];
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Environment = [
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"HOME=${user.home}"
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"GIT_TERMINAL_PROMPT=0"
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];
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Nice = 10;
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IOSchedulingClass = "idle";
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TimeoutStartSec = "10min";
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};
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script = lib.getExe publishSite;
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};
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blogbox-namecheap-ddns = {
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description = "Update Namecheap dynamic DNS for blogbox";
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "oneshot";
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DynamicUser = true;
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EnvironmentFile = [
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"-${toString cfg.environmentFile}"
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"-${toString cfg.ddnsEnvironmentFile}"
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];
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Nice = 10;
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IOSchedulingClass = "idle";
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TimeoutStartSec = "45s";
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};
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script = lib.getExe updateNamecheap;
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};
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blogbox-reload-caddy = {
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description = "Restart Caddy after blogbox runtime configuration changes";
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serviceConfig.Type = "oneshot";
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script = ''
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${pkgs.systemd}/bin/systemctl restart caddy.service
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'';
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};
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};
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systemd.timers = {
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blogbox-publish-site = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnBootSec = "2min";
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OnUnitActiveSec = cfg.publishInterval;
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RandomizedDelaySec = "20s";
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Persistent = true;
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};
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};
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blogbox-namecheap-ddns = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnBootSec = "1min";
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OnUnitActiveSec = cfg.ddnsInterval;
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RandomizedDelaySec = "30s";
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Persistent = true;
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};
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};
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};
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systemd.paths.blogbox-reload-caddy = {
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wantedBy = [ "multi-user.target" ];
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pathConfig = {
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PathExists = cfg.environmentFile;
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PathChanged = cfg.environmentFile;
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};
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};
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};
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}
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