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extract.sh

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+#!/bin/bash
+
+# Exit script immediately if any command fails
+set -e
+# Ensure pipeline commands fail if any part fails (important for cat | zstd | tar)
+set -o pipefail
+
+# --- Configuration ---
+DEFAULT_TARGET_DIR="/workspace/Pointcept/data/waymo"
+
+# Define the pattern for the split training archive parts.
+# Assumes parts are in the current directory where the script is run.
+# Adjust the path if the parts are elsewhere, e.g., /path/to/parts/processed_waymo...
+TRAINING_ARCHIVE_PATTERN="./processed_waymo_training.tar.zst.part.*"
+
+# Define the single validation archive file.
+# Assumes the file is in the current directory where the script is run.
+# Adjust the path if the file is elsewhere, e.g., /path/to/file/processed_waymo...
+VALIDATION_ARCHIVE="./processed_waymo_validation.tar.zst"
+
+# --- Determine Target Directory ---
+# Use the first command-line argument ($1) if provided, otherwise use the default.
+if [[ -n "$1" ]]; then
+    TARGET_DIR="$1"
+    echo "Using custom target directory provided: $TARGET_DIR"
+else
+    TARGET_DIR="$DEFAULT_TARGET_DIR"
+    echo "No custom target directory provided. Using default: $TARGET_DIR"
+fi
+echo # Blank line for spacing
+
+# --- Script Start ---
+echo "--- Waymo Data Extraction Script ---"
+START_TIME=$SECONDS
+
+# --- Check and Create Target Directory ---
+echo "Ensuring target directory exists: $TARGET_DIR"
+if [ ! -d "$TARGET_DIR" ]; then
+    echo "Target directory does not exist. Creating..."
+    # Create the directory, including any necessary parent directories (-p)
+    mkdir -p "$TARGET_DIR"
+    echo "Created directory: $TARGET_DIR"
+else
+    echo "Target directory already exists."
+fi
+echo # Blank line for spacing
+
+# --- Extract Training Archive (Split) ---
+echo "Starting extraction of TRAINING archive..."
+echo "Source pattern: $TRAINING_ARCHIVE_PATTERN"
+echo "This may take a while..."
+
+# Check if any training parts exist before attempting cat
+if ! ls $TRAINING_ARCHIVE_PATTERN > /dev/null 2>&1; then
+    echo "ERROR: No files found matching training archive pattern: $TRAINING_ARCHIVE_PATTERN"
+    exit 1
+fi
+
+# 1. Concatenate the parts using cat
+# 2. Pipe the combined stream to zstd for decompression (-d = decompress, -c = to stdout)
+# 3. Pipe the decompressed tar stream to tar for extraction
+#    -x = extract
+#    -v = verbose (shows files being extracted)
+#    -f - = read archive from stdin (the pipe)
+#    -C "$TARGET_DIR" = change directory to TARGET_DIR before extracting
+cat $TRAINING_ARCHIVE_PATTERN | zstd -dc - | tar -xvf - -C "$TARGET_DIR"
+
+echo "Training archive extraction complete."
+echo # Blank line for spacing
+
+# --- Extract Validation Archive (Single File) ---
+echo "Starting extraction of VALIDATION archive..."
+echo "Source file: $VALIDATION_ARCHIVE"
+echo "This may take a while..."
+
+# Check if validation archive exists
+if [ ! -f "$VALIDATION_ARCHIVE" ]; then
+    echo "ERROR: Validation archive file not found: $VALIDATION_ARCHIVE"
+    exit 1
+fi
+
+# 1. Decompress the file with zstd (-d = decompress, -c = to stdout)
+# 2. Pipe the decompressed tar stream to tar for extraction (same flags as above)
+zstd -dc "$VALIDATION_ARCHIVE" | tar -xvf - -C "$TARGET_DIR"
+
+echo "Validation archive extraction complete."
+echo # Blank line for spacing
+
+# --- Stats and Summary ---
+END_TIME=$SECONDS
+DURATION=$((END_TIME - START_TIME))
+
+echo "--- Extraction Summary ---"
+echo "Extraction process finished successfully."
+echo "Total time taken: $DURATION seconds."
+echo "Data extracted to: $TARGET_DIR"
+
+# Show the top-level directories created inside the target directory
+echo "Contents of target directory ($TARGET_DIR):"
+ls -l "$TARGET_DIR"
+
+echo "--------------------------"
+
+exit 0

processed_waymo_training.tar.zst.part.01

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+oid sha256:9f03ae73f26703307096ba13aa6abf33ec5498c8925d7ad2f915e0969001269a
+size 9663676416

processed_waymo_training.tar.zst.part.02

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+version https://git-lfs.github.com/spec/v1
+oid sha256:d86a8d2b41f64320528be6b563a896391b04d8fd05446bc0cca63f867cf4b200
+size 9663676416

processed_waymo_training.tar.zst.part.03

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+version https://git-lfs.github.com/spec/v1
+oid sha256:b2d4eb09a4505168bfef86ceb8cf48d5a52f4196a03f225b5a30a332cc1680da
+size 9663676416

processed_waymo_training.tar.zst.part.04

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+version https://git-lfs.github.com/spec/v1
+oid sha256:2fdfe1d2c615f2328862a4c8b80a5bf6fdf73415750d07e10a33d4ee834999c0
+size 8898576876

processed_waymo_validation.tar.zst

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+version https://git-lfs.github.com/spec/v1
+oid sha256:532b2231fc7116adcec1871a9226b1ff618cef5375486dfe9d58b13bbffc0ac4
+size 9620067282