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#!/usr/bin/env bash
# Installs pgbox onto machine
# Supports at least Debian and MacOS
set -uexo pipefail
script_home="$(cd "$(dirname "$0")" && pwd)"
default=0.0.0
cmdname="$(basename "$0")"
usage() { echo "Usage: $cmdname VERSION INSTALLDIR_IF_NEEDED"; }
misuse() { usage 1>&2; exit 2; }
# Hashmap of pgbox checksums
declare -A known_hash
known_hash[0.0.0]=c4dd424ddbcaf33cb0d3ef51255943cbdd87446ea7bf220528441849de35cfef
# Verify two arguments were given
test "$#" -eq 2 || misuse
ver="$1"
if test "$ver" = default; then
ver="$default"
fi
install="$2"
hash="${known_hash[$ver]}"
# Verify checksum is known for requested version
if ! test "$hash"; then
echo "$cmdname: don't know sha256sum for $ver" 1>&2
exit 2
fi
# Exit if installed version is same as requested
if command -v pgbox; then
curver="$(pgbox version | cut -d' ' -f2)"
if test "$curver" = "$ver"; then
exit 0
fi
fi
# Create temporary directory
tmpdir="$(mktemp -d "$cmdname-XXXXXX")"
tmpdir="$(cd "$tmpdir" && pwd)"
trap "$(printf 'rm -rf %q' "$tmpdir")" EXIT
# Download pgbox from GitLab releases
cd "$tmpdir"
curl -O "https://gitlab.com/pgbox-org/pgbox/raw/82e512d37a7c6c2ae72d1293ea98945eaaae51f4/pgbox"
obshash="$("$script_home/sha256sum" < pgbox | cut -d' ' -f1)"
cd ..
# Verify checksum of pgbox executable
if test "$obshash" != "$hash"; then
echo "$cmdname: sha256sum $obshash != $hash" 1>&2
exit 2
fi
# Install pgbox
mkdir -p "$install/bin"
mv -i "$tmpdir/pgbox" "$install/bin"
chmod +x "$install/bin/pgbox"
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