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code-server/lib/vscode/.devcontainer/cache/cache-diff.sh

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#!/bin/bash
# This file is used to archive off a copy of any differences in the source tree into another location
# in the image. Once the codespace is up, this will be restored into its proper location (which is
# quick and happens parallel to other startup activities)
set -e
SCRIPT_PATH="$(cd "$(dirname $0)" && pwd)"
SOURCE_FOLDER="${1:-"."}"
CACHE_FOLDER="${2:-"/usr/local/etc/devcontainer-cache"}"
echo "[$(date)] Starting cache operation..."
cd "${SOURCE_FOLDER}"
echo "[$(date)] Determining diffs..."
find -L . -not -path "*/.git/*" -and -not -path "${SCRIPT_PATH}/*.manifest" -type f > "${SCRIPT_PATH}/after.manifest"
grep -Fxvf "${SCRIPT_PATH}/before.manifest" "${SCRIPT_PATH}/after.manifest" > "${SCRIPT_PATH}/cache.manifest"
echo "[$(date)] Archiving diffs..."
mkdir -p "${CACHE_FOLDER}"
tar -cf "${CACHE_FOLDER}/cache.tar" --totals --files-from "${SCRIPT_PATH}/cache.manifest"
echo "[$(date)] Done! $(du -h "${CACHE_FOLDER}/cache.tar")"