From 101c8ec2e7db901a1924a7b5b8b5e37d264b39d8 Mon Sep 17 00:00:00 2001
From: Kayos <kayos@sulkta.com>
Date: Wed, 29 Apr 2026 17:16:43 +0000
Subject: [PATCH] =?UTF-8?q?Dockerfile:=20SHELL=20[/bin/bash]=20before=20Sw?=
 =?UTF-8?q?ift=20layer=20=E2=80=94=20fixes=20${var//pattern}=20bash-ism=20?=
 =?UTF-8?q?that=20dash=20chokes=20on?=
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---
 Dockerfile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Dockerfile b/Dockerfile
index 7caf20b..11cd1ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -90,6 +90,11 @@ ENV DOTNET_CLI_TELEMETRY_OPTOUT=1 \
     DOTNET_NOLOGO=1
 
 # ============================================================
+# Switch to bash for the bash-ism layers below (${var//pattern} etc).
+# Layers above (apt base / Node / Go / .NET) only use POSIX so they cached fine
+# under dash; SHELL is set here to invalidate the cache for layer 6+ only.
+SHELL ["/bin/bash", "-c"]
+
 # 5. Swift (Ubuntu 22.04 tarball — works on Debian bookworm
 #    because bookworm ships the right libicu/libstdc++ baseline)
 # ============================================================