feat: add extra configuration for git syncing all vaults in the ignis dir

modules/nixos/services/apps/ignis/default.nix

@@ -12,9 +12,89 @@
   networkCfg = getAttrByNamespace config "${namespace}.services.networking";
 
   isEnabled = hostHasService networkCfg.network-services hostName "ignis";
-  port = resolveServicePort networkCfg.network-services "ignis" 8081;
+  port = resolveServicePort networkCfg.network-services "ignis" 5125;
+
+  vault-key-provision = import ./vault-key-provision.nix {inherit pkgs;};
+  vault-sync = import ./vault-sync.nix {inherit pkgs;};
 in {
   config = mkIf isEnabled {
+    systemd = {
+      services = {
+        ignis = {
+          description = "Ignis - Self-hosted Obsidian web app";
+          after = ["network.target"];
+          wantedBy = ["multi-user.target"];
+
+          path = with pkgs; [
+            git
+          ];
+
+          environment = {
+            PORT = toString port;
+            VAULT_ROOT = "/var/lib/ignis/vaults";
+            DATA_ROOT = "/var/lib/ignis/data";
+            OBSIDIAN_ASSETS_PATH = "${pkgs.ignis}/lib/ignis/obsidian-app";
+            OBSIDIAN_VERSION = "1.12.7";
+          };
+
+          preStart = ''
+            mkdir -p /var/lib/ignis/vaults /var/lib/ignis/data
+            chown -R ignis:ignis /var/lib/ignis/vaults /var/lib/ignis/data
+          '';
+
+          serviceConfig = {
+            Type = "simple";
+            User = "ignis";
+            Group = "ignis";
+            Restart = "always";
+            RestartSec = 5;
+            ExecStart = "${pkgs.ignis}/bin/ignis-server";
+            StateDirectory = "ignis";
+            StateDirectoryMode = "0750";
+            WorkingDirectory = "${pkgs.ignis}/lib/ignis";
+          };
+        };
+
+        ignis-vault-key-provision = {
+          description = "Provision SSH key and git config for ignis vault sync";
+          after = ["network.target"];
+          before = ["ignis-vault-sync.service"];
+          wantedBy = ["multi-user.target"];
+          environment.HOME = "/var/lib/ignis/data";
+          serviceConfig = {
+            Type = "oneshot";
+            User = "ignis";
+            Group = "ignis";
+            ExecStart = "${vault-key-provision}/bin/ignis-vault-key-provision";
+            RemainAfterExit = true;
+          };
+        };
+
+        ignis-vault-sync = {
+          description = "Auto-commit and pull ignis vaults";
+          after = ["ignis-vault-key-provision.service"];
+          path = with pkgs; [
+            openssh
+          ];
+          environment.HOME = "/var/lib/ignis/data";
+          serviceConfig = {
+            Type = "oneshot";
+            User = "ignis";
+            Group = "ignis";
+            ExecStart = "${vault-sync}/bin/ignis-vault-sync";
+          };
+        };
+      };
+
+      timers = {
+        ignis-vault-sync = {
+          description = "Timer for ignis vault sync";
+          wantedBy = ["timers.target"];
+          timerConfig.OnUnitActiveSec = "1m";
+        };
+      };
+    };
+
     users = {
       users.ignis = {
         isSystemUser = true;
@@ -30,43 +110,8 @@ in {
 
     networking.firewall.allowedTCPPorts = [port];
 
-    systemd.services.ignis = {
-      description = "Ignis - Self-hosted Obsidian web app";
-      after = ["network.target"];
-      wantedBy = ["multi-user.target"];
-
-      path = with pkgs; [
-        git
-      ];
-
-      environment = {
-        PORT = toString port;
-        VAULT_ROOT = "/var/lib/ignis/vaults";
-        DATA_ROOT = "/var/lib/ignis/data";
-        OBSIDIAN_ASSETS_PATH = "${pkgs.ignis}/lib/ignis/obsidian-app";
-        OBSIDIAN_VERSION = "1.12.7";
-      };
-
-      preStart = ''
-        mkdir -p /var/lib/ignis/vaults /var/lib/ignis/data
-        chown -R ignis:ignis /var/lib/ignis/vaults /var/lib/ignis/data
-      '';
-
-      serviceConfig = {
-        Type = "simple";
-        User = "ignis";
-        Group = "ignis";
-        Restart = "always";
-        RestartSec = 5;
-        ExecStart = "${pkgs.ignis}/bin/ignis-server";
-        StateDirectory = "ignis";
-        StateDirectoryMode = "0750";
-        WorkingDirectory = "${pkgs.ignis}/lib/ignis";
-      };
-    };
-
     ${namespace}.services.storage.impermanence.folders = [
-      "/var/lib/ignis/data"
+      "/var/lib/ignis"
     ];
   };
 }

modules/nixos/services/apps/ignis/vault-key-provision.nix

@@ -0,0 +1,29 @@
+{pkgs, ...}:
+pkgs.writeShellScriptBin "ignis-vault-key-provision" ''
+  set -euo pipefail
+
+  DATA_DIR="/var/lib/ignis/data"
+  SSH_DIR="$DATA_DIR/.ssh"
+  KEY_FILE="$SSH_DIR/id_ed25519"
+  PUBLIC_KEY_FILE="$KEY_FILE.pub"
+  HOSTNAME="$(< /proc/sys/kernel/hostname)"
+
+  umask 077
+  mkdir -p "$SSH_DIR"
+
+  if [ ! -f "$KEY_FILE" ]; then
+    ${pkgs.openssh}/bin/ssh-keygen -t ed25519 -N "" -f "$KEY_FILE" -C "ignis-vault-sync@$HOSTNAME"
+
+    echo "# ==============================================================================="
+    echo "# IGNIS VAULT SYNC PUBLIC KEY"
+    echo "# ==============================================================================="
+    cat "$PUBLIC_KEY_FILE"
+  fi
+
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" user.name "C4 Patino"
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" user.email "c4patino@gmail.com"
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" core.sshCommand "${pkgs.openssh}/bin/ssh -i $KEY_FILE -o StrictHostKeyChecking=accept-new"
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" gpg.format ssh
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" user.signingkey "$PUBLIC_KEY_FILE"
+  ${pkgs.git}/bin/git config -f "$DATA_DIR/.gitconfig" commit.gpgsign true
+''

modules/nixos/services/apps/ignis/vault-sync.nix

@@ -0,0 +1,38 @@
+{pkgs}:
+pkgs.writeShellScriptBin "ignis-vault-sync" ''
+  set -euo pipefail
+  set -x
+
+  VAULT_ROOT="/var/lib/ignis/vaults"
+  DATA_DIR="/var/lib/ignis/data"
+  PULL_INTERVAL=300
+
+  for vault in "$VAULT_ROOT"/*/; do
+    [ -d "$vault/.git" ] || continue
+
+    cd "$vault"
+    name=$(basename "$vault")
+
+    now=$(date +%s)
+
+    last_pull_file="$DATA_DIR/.last-pull-$name"
+    last_pull=0
+    [ -f "$last_pull_file" ] && last_pull=$(cat "$last_pull_file")
+
+    if [ $((now - last_pull)) -ge $PULL_INTERVAL ]; then
+      ${pkgs.git}/bin/git pull --rebase 2>/dev/null || true
+      echo "$now" > "$last_pull_file"
+    fi
+
+    if ! ${pkgs.git}/bin/git diff --quiet 2>/dev/null || ! ${pkgs.git}/bin/git diff --cached --quiet 2>/dev/null || [ -n "$(${pkgs.git}/bin/git ls-files --others --exclude-standard 2>/dev/null)" ]; then
+      newest=$(${pkgs.findutils}/bin/find . -not -path './.git/*' -type f -printf '%T@\n' 2>/dev/null | sort -rn 2>/dev/null | head -1) || true
+      newest_int=$(echo "$newest" | cut -d. -f1)
+
+      if [ -z "$newest_int" ] || [ $((now - newest_int)) -ge 60 ]; then
+        ${pkgs.git}/bin/git add -A 2>/dev/null
+        ${pkgs.git}/bin/git commit -m "$(date -u +"docs(%Y/%m/%d): obsidian automatic vault backup")" 2>/dev/null
+        ${pkgs.git}/bin/git push 2>/dev/null
+      fi
+    fi
+  done
+''