fix: Git-annex fixes

modules/nixos/git-annex.nix

@@ -78,7 +78,8 @@ in {
     # The user that users log in as to access managed repos.
     users.groups.annex = {};
     users.users.annex = {
-      isSystemUser = true;
+      # Necessary to enable cloning over SSH.
+      isNormalUser = true;
       group = "annex";
       home = "/var/sydnix/annex";
       createHome = true;
@@ -92,9 +93,25 @@ in {
             	name = ${cfg.user.name}
             [init]
             	defaultBranch = main
+            [core]
+            	symlinks = true
           '';
       in ''
-        ln -sf "${gitconfig-file}" ~/.gitconfig
+        set -e
+
+        annexHome="${config.users.users.annex.home}"
+        ln -sf "${gitconfig-file}" "$annexHome/.gitconfig"
+
+        # Symlink repos into annex's home for easy access.  This is particularly nice for cloning:
+        #   git clone annex@deertopia.net:org
+        # instead of
+        #   git clone annex@deertopia.net:/persist/deertopia.net/org
+        # Less assumptions about the host's file system!
+        ${lib.strings.toShellVar "repos" (builtins.attrNames cfg.repos)}
+        for repoPath in ''${!repos[@]}; do
+          target="$annexHome/$(basename "$repoPath")"
+          ln -sf "$repoPath" "$target"
+        done
       '';
 
     systemd.services =
@@ -103,13 +120,18 @@ in {
           pkgs.writeScript "git-annex-init-if-necessary" ''
             #!/usr/bin/env bash
             set -e
+
             [ -e .git ] || git init
             [ -e .git/annex ] || git annex init
 
+            # Symlink repo into user `annex` for easy access.
+            ln -sf "$(pwd)" "$HOME/"
+
             ${lib.strings.toShellVar "remotes" repo.remotes}
             for remoteName in ''${!remotes[@]}; do
-              git remote get-url "$remoteName"
-              if [ $? -eq 0 ]; then
+              err=0
+              git remote get-url "$remoteName" || err=$?
+              if [ $err -eq 0 ]; then
                 git remote set-url "$remoteName" "''${remotes["$remoteName"]}"
               else
                 git remote add "$remoteName" "''${remotes["$remoteName"]}"