From 620d8a1929c5799d4a254b080778faa47485b65c Mon Sep 17 00:00:00 2001
From: Nico Verbruggen <mail@nicoverbruggen.be>
Date: Sat, 21 Mar 2026 13:59:29 +0100
Subject: [PATCH] Check if local go is already installed

---
 kobopatch-wasm/setup.sh | 39 +++++++++++++++++++++------------------
 1 file changed, 21 insertions(+), 18 deletions(-)

diff --git a/kobopatch-wasm/setup.sh b/kobopatch-wasm/setup.sh
index 7c9f679..6ef0089 100755
--- a/kobopatch-wasm/setup.sh
+++ b/kobopatch-wasm/setup.sh
@@ -6,30 +6,33 @@ KOBOPATCH_DIR="$SCRIPT_DIR/kobopatch-src"
 GO_VERSION="1.23.12"
 LOCAL_GO_DIR="$SCRIPT_DIR/go"
 
-# Detect platform and architecture
-OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
-ARCH="$(uname -m)"
-case "$ARCH" in
-    x86_64)  ARCH="amd64" ;;
-    aarch64|arm64) ARCH="arm64" ;;
-    *)
-        echo "Error: unsupported architecture: $ARCH"
-        exit 1
-        ;;
-esac
-
-# Download Go locally if not already present or wrong version
-if [ -x "$LOCAL_GO_DIR/bin/go" ] && "$LOCAL_GO_DIR/bin/go" version 2>/dev/null | grep -q "go${GO_VERSION}"; then
-    echo "Local Go ${GO_VERSION} already installed."
+# Use system Go if available, otherwise download locally
+if command -v go &>/dev/null; then
+    echo "Using system Go: $(go version)"
+elif [ -x "$LOCAL_GO_DIR/bin/go" ] && "$LOCAL_GO_DIR/bin/go" version 2>/dev/null | grep -q "go${GO_VERSION}"; then
+    echo "Using local Go ${GO_VERSION}."
+    export GOROOT="$LOCAL_GO_DIR"
+    export PATH="$LOCAL_GO_DIR/bin:$PATH"
 else
+    # Detect platform and architecture
+    OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
+    ARCH="$(uname -m)"
+    case "$ARCH" in
+        x86_64)  ARCH="amd64" ;;
+        aarch64|arm64) ARCH="arm64" ;;
+        *)
+            echo "Error: unsupported architecture: $ARCH"
+            exit 1
+            ;;
+    esac
+
     echo "Downloading Go ${GO_VERSION} for ${OS}/${ARCH}..."
     rm -rf "$LOCAL_GO_DIR"
     curl -fsSL "https://go.dev/dl/go${GO_VERSION}.${OS}-${ARCH}.tar.gz" | tar -xz -C "$SCRIPT_DIR"
+    export GOROOT="$LOCAL_GO_DIR"
+    export PATH="$LOCAL_GO_DIR/bin:$PATH"
 fi
 
-export GOROOT="$LOCAL_GO_DIR"
-export PATH="$LOCAL_GO_DIR/bin:$PATH"
-
 if [ -d "$KOBOPATCH_DIR" ]; then
     echo "Updating kobopatch source..."
     cd "$KOBOPATCH_DIR"