30 lines
691 B
Bash
Executable File
30 lines
691 B
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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[ -z "${1:-}" ] && { echo "Usage: $0 <tarball>"; exit 1; }
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tarball=$(realpath "$1")
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top_dir=$(tar -tf "$tarball" | sed -e 's/^\.\///' | cut -d/ -f1 | sort -u)
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if [ "$(echo "$top_dir" | wc -l)" -ne 1 ]; then
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echo "Error: Tarball must contain a single top-level directory."
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exit 1
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fi
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mountpoint=$(mktemp -d)
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cleanup() {
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cd /
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sudo umount "$mountpoint" 2>/dev/null || true
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rmdir "$mountpoint"
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}
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trap cleanup EXIT
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sudo mount -t tmpfs -o size=8G tmpfs "$mountpoint"
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tar -xf "$tarball" -C "$mountpoint"
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pushd "$mountpoint/$top_dir" > /dev/null
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echo "Spawning shell in tmpfs. Type 'exit' to finish and cleanup."
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bash
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popd > /dev/null
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