[eric] voice: bundle per-arch whisper-server into the mac build (pinned v1.7.6, static + non-system-dylib gate; model stays the proven first-run download)

electron/scripts/build-whisper.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+# Build whisper.cpp's whisper-server for one arch and stage it where electron-builder's
+# extraResources picks it up (build-staging/whisper/<arch>). The packaged app resolves it at
+# resources/whisper/whisper-server (electron/voice/whisperService.js resolveBinary); the model
+# stays a first-run download (ships +0MB, whisperService owns the fetch + progress UI).
+# The brew binary can't be bundled: it links homebrew dylibs that don't exist on user machines.
+set -euo pipefail
+
+ARCH="${1:?usage: build-whisper.sh <arm64|x64>}"
+
+WHISPER_VERSION="v1.7.6"
+HERE="$(cd "$(dirname "$0")/.." && pwd)"   # electron/
+OUT="$HERE/build-staging/whisper/$ARCH"
+SRC="$HERE/build-staging/whisper-src"
+
+# Idempotent across publish reruns: a staged binary from the same pinned version is reused.
+if [[ -f "$OUT/whisper-server" && -f "$OUT/.version" && "$(cat "$OUT/.version")" == "$WHISPER_VERSION" ]]; then
+    echo "[whisper] $ARCH already staged at $WHISPER_VERSION, skipping"
+    exit 0
+fi
+
+if [[ ! -d "$SRC/.git" ]]; then
+    git clone --depth 1 --branch "$WHISPER_VERSION" https://github.com/ggml-org/whisper.cpp "$SRC"
+else
+    CUR="$(git -C "$SRC" describe --tags --exact-match 2>/dev/null || echo none)"
+    if [[ "$CUR" != "$WHISPER_VERSION" ]]; then
+        git -C "$SRC" fetch --depth 1 origin tag "$WHISPER_VERSION"
+        git -C "$SRC" checkout -f "$WHISPER_VERSION"
+    fi
+fi
+
+case "$ARCH" in
+    arm64) OSX_ARCH="arm64";  EXTRA=(-DGGML_METAL=ON -DGGML_METAL_EMBED_LIBRARY=ON) ;;
+    # Intel slice: CPU + Accelerate only. Metal shaders target Apple Silicon, and GGML_NATIVE
+    # would bake this arm64 build host's flags into a cross build.
+    x64)   OSX_ARCH="x86_64"; EXTRA=(-DGGML_METAL=OFF -DGGML_NATIVE=OFF) ;;
+    *) echo "unknown arch: $ARCH"; exit 1 ;;
+esac
+
+BUILD_DIR="$SRC/build-$ARCH"
+echo "[whisper] building whisper-server $WHISPER_VERSION for $ARCH..."
+cmake -S "$SRC" -B "$BUILD_DIR" \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_OSX_ARCHITECTURES="$OSX_ARCH" \
+    -DBUILD_SHARED_LIBS=OFF \
+    -DWHISPER_BUILD_TESTS=OFF \
+    "${EXTRA[@]}" > /dev/null
+cmake --build "$BUILD_DIR" --target whisper-server -j "$(sysctl -n hw.ncpu)" > /dev/null
+
+BIN="$BUILD_DIR/bin/whisper-server"
+[[ -f "$BIN" ]] || { echo "[whisper] build produced no whisper-server"; exit 1; }
+
+mkdir -p "$OUT"
+cp "$BIN" "$OUT/whisper-server"
+echo "$WHISPER_VERSION" > "$OUT/.version"
+echo "[whisper] staged -> $OUT/whisper-server"
+file "$OUT/whisper-server"
+# A binary that links anything outside the OS is a launch crash on user machines; fail loud here.
+if otool -L "$OUT/whisper-server" | grep -qE "/opt/homebrew|/usr/local"; then
+    echo "[whisper] ERROR: binary links non-system libraries"; otool -L "$OUT/whisper-server"; exit 1
+fi