From 5b66d08e67f9b2521ba0ce40a4333d36257b734d Mon Sep 17 00:00:00 2001
From: Patrik Stutz <patrik.stutz@gmail.com>
Date: Mon, 30 Sep 2024 00:28:03 +0200
Subject: [PATCH] allow running process-compose in detached mode, then
 attaching and stopping afterwards

---
 example/flake.nix               |  2 ++
 nix/process-compose/default.nix | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/example/flake.nix b/example/flake.nix
index 3a640b3..a0c02d9 100644
--- a/example/flake.nix
+++ b/example/flake.nix
@@ -78,6 +78,8 @@
           };
 
         # nix run .#ponysay up to start the process
+        # nun run .#ponysay attach to show the output
+        # nix run .#ponysay down to stop the process
         packages.ponysay = (import ../nix/eval-modules.nix).makeProcessCompose {
           inherit pkgs;
           name = "ponysay";
diff --git a/nix/process-compose/default.nix b/nix/process-compose/default.nix
index 36e75fa..23ab565 100644
--- a/nix/process-compose/default.nix
+++ b/nix/process-compose/default.nix
@@ -44,7 +44,15 @@ in
           text = ''
             ${preHook}
 
-            set -x; process-compose ${arguments.global} ${arguments.up}"$@"; set +x
+            params=(${arguments.global})
+            set +u
+            if [ -z "$1" ] || [[ "$1" == "up" ]] || [[ "$1" == -* ]] ; then
+              params+=(${arguments.up})
+            fi
+
+            set -x;
+            process-compose "''${params[@]}" "$@";
+            set +x
 
             ${postHook}
           '';