fix(fish-speech): resolve relocated source

The editable install records the backend build path, which does not exist after LocalAI relocates the packaged backend. Add the runtime source directory to PYTHONPATH so inference modules remain importable.

Assisted-by: Codex:gpt-5
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

backend/python/fish-speech/Makefile

@@ -1,10 +1,13 @@
-.PHONY: fish-speech test-source-preparation
-fish-speech: test-source-preparation
+.PHONY: fish-speech test-source-preparation test-runtime-import
+fish-speech: test-source-preparation test-runtime-import
 	bash install.sh
 
 test-source-preparation:
 	bash prepare-source_test.sh
 
+test-runtime-import:
+	bash run_test.sh
+
 .PHONY: run
 run: fish-speech
 	@echo "Running fish-speech..."

backend/python/fish-speech/run.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-backend_dir=$(dirname $0)
+backend_dir=$(dirname "$(realpath "$0")")
 if [ -d $backend_dir/common ]; then
     source $backend_dir/common/libbackend.sh
 else
@@ -8,7 +8,7 @@ fi
 
 # Editable installs record their build-time absolute source path, which becomes
 # stale when the backend is relocated under /backends at install time.
-export PYTHONPATH="${EDIR}/fish-speech-src${PYTHONPATH:+:${PYTHONPATH}}"
+export PYTHONPATH="${backend_dir}/fish-speech-src${PYTHONPATH:+:${PYTHONPATH}}"
 
 cuda_home=${CUDA_HOME:-/usr/local/cuda}
 if [ -z "${TRITON_PTXAS_PATH:-}" ] && [ -x "$cuda_home/bin/ptxas" ]; then

backend/python/fish-speech/run_test.sh

@@ -1,27 +1,23 @@
 #!/bin/bash
-# SPDX-License-Identifier: MIT
 set -euo pipefail
 
-backend_dir=$(cd "$(dirname "$0")" && pwd)
-work=$(mktemp -d)
-trap 'rm -rf "$work"' EXIT
+SCRIPT_DIR=$(dirname "$(realpath "$0")")
+WORK_DIR=$(mktemp -d)
+trap 'rm -rf "$WORK_DIR"' EXIT
 
-mkdir -p "$work/backend/common" "$work/backend/fish-speech-src"
-cp "$backend_dir/run.sh" "$work/backend/run.sh"
+mkdir -p "$WORK_DIR/runtime/common" "$WORK_DIR/runtime/fish-speech-src/fish_speech"
+cp "$SCRIPT_DIR/run.sh" "$WORK_DIR/runtime/run.sh"
 
-cat > "$work/backend/common/libbackend.sh" <<'EOF'
-EDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+cat > "$WORK_DIR/runtime/fish-speech-src/fish_speech/inference_engine.py" <<'PY'
+IMPORT_OK = True
+PY
+
+cat > "$WORK_DIR/runtime/common/libbackend.sh" <<'SH'
 startBackend() {
-    printf '%s\n' "$PYTHONPATH"
+    python3 -c 'from fish_speech.inference_engine import IMPORT_OK; assert IMPORT_OK'
 }
-EOF
+SH
 
-actual=$(PYTHONPATH=/existing/path bash "$work/backend/run.sh")
-expected="$work/backend/fish-speech-src:/existing/path"
+bash "$WORK_DIR/runtime/run.sh"
 
-if [ "$actual" != "$expected" ]; then
-    printf 'expected PYTHONPATH %s, got %s\n' "$expected" "$actual" >&2
-    exit 1
-fi
-
-echo "PASS: relocated fish-speech source is importable"
+echo "PASS: runtime launcher imports relocated fish-speech source"