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Motion-Rig
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#!/bin/bash
# Idempotent install script — skips steps already completed on previous runs.
# Model weights and repo are stored in /data for persistence across restarts.

set -euo pipefail

DATA_ROOT="${DATA_ROOT:-/data}"
REPO_DIR="${DATA_ROOT}/app"
SENTINEL="${REPO_DIR}/.install_complete"
WEIGHTS_DIR="${DATA_ROOT}/models/make-it-animatable"

mkdir -p "${DATA_ROOT}/temp" "${WEIGHTS_DIR}"

# ── 1. Clone repo (once) ──────────────────────────────────────────────────────
if [ ! -f "$SENTINEL" ]; then
    echo "==> Cloning Make-It-Animatable..."
    git lfs install
    rm -rf "$REPO_DIR"
    git clone https://github.com/jasongzy/Make-It-Animatable --recursive --single-branch --depth 1 "$REPO_DIR"
else
    echo "==> Repo already present, skipping clone."
fi

# Symlink so the Space entrypoint can find the upstream package as ./app/.
# `ln -sfn SOURCE EXISTING_DIR` creates EXISTING_DIR/app instead of replacing
# the directory, so always resolve the destination explicitly.
if [ -L "app" ]; then
    ln -sfn "$REPO_DIR" app
elif [ ! -e "app" ]; then
    ln -s "$REPO_DIR" app
fi

# ── 2. FBX2glTF binary (once) ─────────────────────────────────────────────────
if [ ! -f "${REPO_DIR}/util/FBX2glTF" ]; then
    echo "==> Downloading FBX2glTF..."
    wget -q https://github.com/facebookincubator/FBX2glTF/releases/download/v0.9.7/FBX2glTF-linux-x64 \
         -O "${REPO_DIR}/util/FBX2glTF"
    chmod +x "${REPO_DIR}/util/FBX2glTF"
else
    echo "==> FBX2glTF already present."
fi

# ── 3. Model weights (once) ───────────────────────────────────────────────────
if [ -d "${WEIGHTS_DIR}/data" ] && [ "$(ls -A ${WEIGHTS_DIR}/data 2>/dev/null)" ]; then
    echo "==> Model weights already present, skipping download."
    rm -rf "${REPO_DIR}/data" "${REPO_DIR}/output"
    ln -s "${WEIGHTS_DIR}/data"   "${REPO_DIR}/data"
    ln -s "${WEIGHTS_DIR}/output" "${REPO_DIR}/output"
else
    echo "==> Downloading model weights (one-time only)..."
    TMPDIR="${DATA_ROOT}/temp/hf-weights"
    rm -rf "$TMPDIR"
    python3 -c "
from huggingface_hub import snapshot_download
snapshot_download('jasongzy/Make-It-Animatable', local_dir='${TMPDIR}',
                  ignore_patterns=['*.git*', '.gitattributes'])
print('Download complete.')
"
    [ -d "${TMPDIR}/data"   ] && mv "${TMPDIR}/data"   "${WEIGHTS_DIR}/data"
    [ -d "${TMPDIR}/output" ] && mv "${TMPDIR}/output" "${WEIGHTS_DIR}/output"
    rm -rf "$TMPDIR"
    rm -rf "${REPO_DIR}/data" "${REPO_DIR}/output"
    ln -s "${WEIGHTS_DIR}/data"   "${REPO_DIR}/data"
    ln -s "${WEIGHTS_DIR}/output" "${REPO_DIR}/output"
    echo "==> Weights saved to ${WEIGHTS_DIR}"
fi

# ── 4. Mixamo bones ───────────────────────────────────────────────────────────
mkdir -p "${REPO_DIR}/data/Mixamo/animation" 2>/dev/null || true
BONES_SRC="${REPO_DIR}/data/Standard Run.fbx"
BONES_DST="${REPO_DIR}/data/Mixamo/bones.fbx"
if [ -f "$BONES_SRC" ] && [ ! -f "$BONES_DST" ]; then
    cp "$BONES_SRC" "$BONES_DST"
fi
test -s "$BONES_DST"

# ── 5. Runtime patches ────────────────────────────────────────────────────────
python3 patch_runtime.py

# ── 6. Mark complete ──────────────────────────────────────────────────────────
touch "$SENTINEL"
echo "==> install.sh done."