status-mobile/nix/scripts/lib.sh

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#!/usr/bin/env bash
# Checking group ownership to identify installation type.
file_group() {
UNAME=$(uname -s)
if [[ "${UNAME}" == "Linux" ]]; then
stat -Lc "%G" "${1}" 2>/dev/null
elif [[ "${UNAME}" == "Darwin" ]]; then
stat -Lf "%Sg" "${1}" 2>/dev/null
fi
}
os_name() {
source /etc/os-release 2>/dev/null
echo "${NAME}"
}
is_arch_linux() {
[[ -f /etc/arch-release ]]
}
nix_install_type() {
NIX_STORE_DIR_GROUP=$(file_group /nix/store)
if [[ "$(os_name)" =~ NixOS ]]; then
echo "nixos"
else
case "${NIX_STORE_DIR_GROUP}" in
"nixbld") echo "multi";;
"30000") echo "multi";;
"(30000)") echo "multi";;
"wheel") echo "single";;
"users") echo "single";;
"${USER}") echo "single";;
"${UID}") echo "single";;
"(${UID})") echo "single";;
"") echo "none";
echo "No Nix installtion detected!" >&2;;
*) echo "Unknown Nix installtion type!" >&2; exit 1;;
esac
fi
}
nix_root() {
NIX_ROOT="/nix"
if [[ $(uname -s) == "Darwin" ]]; then
# Special case due to read-only root on MacOS Catalina
NIX_ROOT="/opt/nix"
fi
echo "${NIX_ROOT}"
}
nix_current_version() {
nix-env --version | awk '{print $3}'
}