From 20c79634716ecc790fb46fb26b7bcdd9bcbc23a4 Mon Sep 17 00:00:00 2001
From: Giuseppe Ruggiero <20145321+poe84it@users.noreply.github.com>
Date: Sun, 14 Sep 2025 02:26:44 +0200
Subject: [PATCH] powerline-go: fix PROMPT_COMMAND duplicate in bash
 initialization (#7697)

---
 modules/programs/powerline-go.nix            | 4 +++-
 tests/modules/programs/powerline-go/bash.nix | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/modules/programs/powerline-go.nix b/modules/programs/powerline-go.nix
index e523526a..1fd5268b 100644
--- a/modules/programs/powerline-go.nix
+++ b/modules/programs/powerline-go.nix
@@ -165,7 +165,9 @@ in
       }
 
       if [ "$TERM" != "linux" ]; then
-        PROMPT_COMMAND="_update_ps1;$PROMPT_COMMAND"
+        if [[ ";''${PROMPT_COMMAND:-};" != *";_update_ps1;"* ]]; then
+          PROMPT_COMMAND="_update_ps1''${PROMPT_COMMAND:+;$PROMPT_COMMAND}"
+        fi
       fi
     '';
 
diff --git a/tests/modules/programs/powerline-go/bash.nix b/tests/modules/programs/powerline-go/bash.nix
index aead1a18..e7051829 100644
--- a/tests/modules/programs/powerline-go/bash.nix
+++ b/tests/modules/programs/powerline-go/bash.nix
@@ -26,5 +26,8 @@
     assertFileContains \
       home-files/.bashrc \
       '/bin/powerline-go -error $old_exit_status -shell bash -modules nix-shell -newline -path-aliases \~/project/foo=prj-foo -ignore-repos /home/me/project1,/home/me/project2'
+    assertFileContains \
+      home-files/.bashrc \
+      'if [[ ";''${PROMPT_COMMAND:-};" != *";_update_ps1;"* ]]; then'
   '';
 }