cache-apt-pkgs-action/install_and_cache_pkgs.sh

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#!/bin/bash
# Fail on any error.
set -e
# Directory that holds the cached packages.
cache_dir=$1
# List of the packages to use.
packages="${@:2}"
package_count=$(echo $packages | wc -w)
echo "Clean installing and caching $package_count package(s).\n"
echo "Package list:"
for package in $packages; do
echo "- $package"
done
echo ""
echo -n "Updating APT package list..."
sudo apt-get update > /dev/null
echo "done."
for package in $packages; do
cache_filepath=$cache_dir/$package.tar.gz
echo -n "Clean installing $package..."
sudo apt-get --yes install $package > /dev/null
echo "done."
echo -n "Caching $package to $cache_filepath..."
# Pipe all package files (no folders) to Tar.
dpkg -L $package |
while IFS= read -r f; do
if test -f $f; then echo ${f:1}; fi; #${f:1} removes the leading slash that Tar disallows
done |
xargs tar -czf $cache_filepath -C /
echo "done."
done
echo "$(echo $packages | wc -w) package(s) installed and cached."