make justfile compatible with different 'just' implementations, fixes #3866

justfile

@@ -1,6 +1,6 @@
 # Shows help
 default:
-    @just --list --justfile {{ justfile() }}
+    @{{ just_executable() }} --list --justfile {{ justfile() }}
 
 # Pulls external Ansible roles
 roles:
@@ -17,7 +17,7 @@ roles:
 update *flags: update-playbook-only
     #!/usr/bin/env sh
     if [ -x "$(command -v agru)" ]; then
-        echo {{ if flags == "" { "Installing roles pinned in requirements.yml…" } else if flags == "-u" { "Updating roles and pinning new versions in requirements.yml…" } else { "Unknown flags passed" } }}
+        echo {{ if flags == "" { "Installing roles pinned in requirements.yml…" } else { if flags == "-u" { "Updating roles and pinning new versions in requirements.yml…" } else { "Unknown flags passed" } } }}
         agru {{ flags }}
     else
         echo "[NOTE] You are using the standard ansible-galaxy tool to install roles, which is slow and lacks other features. We recommend installing the 'agru' tool to speed up the process: https://github.com/etkecc/agru#where-to-get"
@@ -42,7 +42,7 @@ install-all *extra_args: (run-tags "install-all,ensure-matrix-users-created,star
 
 # Runs installation tasks for a single service
 install-service service *extra_args:
-    just --justfile {{ justfile() }} run \
+    {{ just_executable() }} --justfile {{ justfile() }} run \
     --tags=install-{{ service }},start-group \
     --extra-vars=group={{ service }} \
     --extra-vars=devture_systemd_service_manager_service_restart_mode=one-by-one {{ extra_args }}
@@ -56,7 +56,7 @@ run +extra_args:
 
 # Runs the playbook with the given list of comma-separated tags and optional arguments
 run-tags tags *extra_args:
-    just --justfile {{ justfile() }} run --tags={{ tags }} {{ extra_args }}
+    {{ just_executable() }} --justfile {{ justfile() }} run --tags={{ tags }} {{ extra_args }}
 
 # Runs the playbook in user-registration mode
 register-user username password admin_yes_or_no *extra_args:
@@ -67,14 +67,14 @@ start-all *extra_args: (run-tags "start-all" extra_args)
 
 # Starts a specific service group
 start-group group *extra_args:
-    @just --justfile {{ justfile() }} run-tags start-group --extra-vars="group={{ group }}" {{ extra_args }}
+    @{{ just_executable() }} --justfile {{ justfile() }} run-tags start-group --extra-vars="group={{ group }}" {{ extra_args }}
 
 # Stops all services
 stop-all *extra_args: (run-tags "stop-all" extra_args)
 
 # Stops a specific service group
 stop-group group *extra_args:
-    @just --justfile {{ justfile() }} run-tags stop-group --extra-vars="group={{ group }}" {{ extra_args }}
+    @{{ just_executable() }} --justfile {{ justfile() }} run-tags stop-group --extra-vars="group={{ group }}" {{ extra_args }}
 
 # Rebuilds the mautrix-meta-instagram Ansible role using the mautrix-meta-messenger role as a source
 rebuild-mautrix-meta-instagram: