bicep: add git-mirroring service

2025-03-30 17:18:28 +02:00
parent 20e3f89b79
commit 20ade0d619
10 changed files with 585 additions and 3 deletions
--- a/modules/gickup/update-linktree.nix
+++ b/modules/gickup/update-linktree.nix
@@ -0,0 +1,84 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.services.gickup;
+in
+{
+  config = lib.mkIf cfg.enable {
+    # TODO: run upon completion of cloning a repository
+    systemd.timers."gickup-linktree" = {
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "daily";
+        Persistent = true;
+        Unit = "gickup-linktree.service";
+      };
+    };
+
+    # TODO: update symlink for one repo at a time (e.g. gickup-linktree@<instance>.service)
+    systemd.services."gickup-linktree" = {
+      serviceConfig = {
+        Type = "oneshot";
+        ExecStart = let
+          script = pkgs.writeShellApplication {
+            name = "gickup-update-symlink-tree.sh";
+            runtimeInputs = [
+              pkgs.coreutils
+              pkgs.findutils
+            ];
+            text = ''
+              shopt -s nullglob
+
+              for repository in ./*/*/*; do
+                REPOSITORY_RELATIVE_DIRS=''${repository#"./"}
+
+                echo "Checking $REPOSITORY_RELATIVE_DIRS"
+
+                declare -a REVISIONS
+                readarray -t REVISIONS < <(find "$repository" -mindepth 1 -maxdepth 1 -printf "%f\n" | sort --numeric-sort --reverse)
+
+                if [[ "''${#REVISIONS[@]}" == 0 ]]; then
+                  echo "Found no revisions for $repository, continuing"
+                  continue
+                fi
+
+                LAST_REVISION="''${REVISIONS[0]}"
+                SYMLINK_PATH="../linktree/''${REPOSITORY_RELATIVE_DIRS}"
+
+                mkdir -p "$(dirname "$SYMLINK_PATH")"
+
+                EXPECTED_SYMLINK_TARGET=$(realpath "''${repository}/''${LAST_REVISION}")
+                EXISTING_SYMLINK_TARGET=$(realpath "$SYMLINK_PATH" || echo "<none>")
+
+                if [[ "$EXISTING_SYMLINK_TARGET" != "$EXPECTED_SYMLINK_TARGET" ]]; then
+                  echo "Updating symlink for $REPOSITORY_RELATIVE_DIRS"
+                  rm "$SYMLINK_PATH" ||:
+                  ln -rs "$EXPECTED_SYMLINK_TARGET" "$SYMLINK_PATH"
+                else
+                  echo "Symlink already up to date, continuing..."
+                fi
+
+                echo "---"
+              done
+            '';
+          };
+        in lib.getExe script;
+
+        User = "gickup";
+        Group = "gickup";
+
+        BindPaths = lib.optionals (cfg.dataDir != "/var/lib/gickup") [
+          "${cfg.dataDir}:/var/lib/gickup"
+        ];
+
+        Slice = "system-gickup.slice";
+
+        StateDirectory = "gickup";
+        WorkingDirectory = "/var/lib/gickup/raw";
+
+        # Hardening options
+        # TODO:
+        PrivateNetwork = true;
+      };
+    };
+  };
+}