major version on pkg name to avoid collision can alias on install

Author: samrose

ansible/tasks/setup-wal-g.yml

@@ -24,7 +24,7 @@
 - name: Install wal-g 2 from nix binary cache
   become: yes
   shell: |
-    sudo -u wal-g bash -c ". /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh && nix profile install github:supabase/postgres/{{ git_commit_sha }}#wal-g"
+    sudo -u wal-g bash -c ". /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh && nix profile install github:supabase/postgres/{{ git_commit_sha }}#wal-g-2"
   when: stage2_nix
 
 - name: Install wal-g 3 from nix binary cache
@@ -35,7 +35,7 @@
 
 - name: Create symlink for wal-g from Nix profile to /usr/local/bin
   ansible.builtin.file:
-    src: /home/wal-g/.nix-profile/bin/wal-g
+    src: /home/wal-g/.nix-profile/bin/wal-g-2
     dest: /usr/local/bin/wal-g
     state: link
     force: yes  # This will replace existing file/symlink if it exists

flake.nix

@@ -87,7 +87,7 @@
         sfcgal = pkgs.callPackage ./nix/ext/sfcgal/sfcgal.nix { };
         supabase-groonga = pkgs.callPackage ./nix/supabase-groonga.nix { };
         mecab-naist-jdic = pkgs.callPackage ./nix/ext/mecab-naist-jdic/default.nix { };
-        inherit (pkgs.callPackage ./nix/wal-g.nix { }) wal-g wal-g-3;
+        inherit (pkgs.callPackage ./nix/wal-g.nix { }) wal-g-2 wal-g-3;
         # Our list of PostgreSQL extensions which come from upstream Nixpkgs.
         # These are maintained upstream and can easily be used here just by
         # listing their name. Anytime the version of nixpkgs is upgraded, these
@@ -406,7 +406,7 @@
           # PostgreSQL versions.
           psql_15 = postgresVersions.psql_15;
           psql_orioledb-17 = postgresVersions.psql_orioledb-17;
-          wal-g = wal-g;
+          wal-g-2 = wal-g-2;
           wal-g-3 = wal-g-3;
           sfcgal = sfcgal;
           pg_prove = pkgs.perlPackages.TAPParserSourceHandlerpgTAP;

nix/wal-g.nix

@@ -8,9 +8,9 @@
 }:
 
 let
-  walGCommon = { version, vendorHash, sha256 }:
+  walGCommon = { version, vendorHash, sha256, majorVersion }:
     buildGoModule rec {
-      pname = "wal-g";
+      pname = "wal-g-${majorVersion}";
       inherit version;
 
       src = fetchFromGitHub {
@@ -61,16 +61,18 @@ let
 in
 {
   # wal-g v2.0.1
-  wal-g = walGCommon {
+  wal-g-2 = walGCommon {
     version = "2.0.1";
     sha256 = "sha256-5mwA55aAHwEFabGZ6c3pi8NLcYofvoe4bb/cFj7NWok="; 
     vendorHash = "sha256-BbQuY6r30AkxlCZjY8JizaOrqEBdv7rIQet9KQwYB/g=";
+    majorVersion = "2";
   };
 
   # wal-g v3.0.5
   wal-g-3 = walGCommon {
     version = "3.0.5";
     sha256 = "sha256-wVr0L2ZXMuEo6tc2ajNzPinVQ8ZVzNOSoaHZ4oFsA+U=";
     vendorHash = "sha256-YDLAmRfDl9TgbabXj/1rxVQ052NZDg3IagXVTe5i9dw=";
+    majorVersion = "3";
   };
 }