status-react/nix/shell.sh

80 lines
2.9 KiB
Bash
Executable File

#!/usr/bin/env bash
#
# This script is used by the Makefile to have an implicit nix-shell.
# The following environment variables modify the script behavior:
# - TARGET_OS: This attribute is passed as `target-os` to Nix, limiting the scope
# of the Nix expressions.
# - _NIX_ATTR: Used to specify an attribute set from inside the expression in `default.nix`.
# This allows for drilling down into a specific attribute in Nix expressions.
# - _NIX_PURE: This variable allows for making the shell pure with the use of --pure.
# Take note that this makes Nix tools like `nix-build` unavailable in the shell.
# - _NIX_KEEP: This variable allows specifying which env vars to keep for Nix pure shell.
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'
export TERM=xterm # fix for colors
shift # we remove the first -c from arguments
if ! command -v "nix" >/dev/null 2>&1; then
if [ -f ~/.nix-profile/etc/profile.d/nix.sh ]; then
. ~/.nix-profile/etc/profile.d/nix.sh
elif [ "$IN_NIX_SHELL" != 'pure' ]; then
echo -e "${GREEN}Setting up environment...${NC}" > /dev/stderr
./scripts/setup
. ~/.nix-profile/etc/profile.d/nix.sh
fi
fi
if !command -v "nix" >/dev/null 2>&1; then
echo "Nix not available, sourcing profile failed!" > /dev/stderr
exit 1
fi
shellArgs=(
"--show-trace"
)
if [[ -n "${TARGET_OS}" ]]; then
shellArgs+=("--argstr target-os ${TARGET_OS}")
else
echo -e "${YELLOW}Env is missing TARGET_OS, assuming no target platform.${NC} See nix/README.md for more details." > /dev/stderr
fi
if [[ "$TARGET_OS" =~ (linux|windows|darwin|macos) ]]; then
# This is a dirty workaround because 'yarn install' is an impure operation,
# so we need to call it from an impure shell.
# Hopefully we'll be able to fix this later on with something like yarn2nix
nix-shell ${shellArgs[@]} --run "scripts/prepare-for-desktop-platform.sh" || exit
fi
# if _NIX_ATTR is specified we shouldn't use shell.nix, the path will be different
entryPoint="shell.nix"
if [ -n "${_NIX_ATTR}" ]; then
shellArgs+=("--attr ${_NIX_ATTR}")
entryPoint="default.nix"
fi
# ENTER_NIX_SHELL is the fake command used when `make shell` is run.
# It is just a special string, not a variable, and a marker to not use `--run`.
if [[ $@ == "ENTER_NIX_SHELL" ]]; then
echo -e "${GREEN}Configuring ${_NIX_ATTR:-default} Nix shell for target '${TARGET_OS:-none}'...${NC}" > /dev/stderr
exec nix-shell ${shellArgs[@]} ${entryPoint}
else
# Not all builds are ready to be run in a pure environment
if [[ -n "${_NIX_PURE}" ]]; then
shellArgs+=("--pure")
pureDesc='pure '
fi
# This variable allows specifying which env vars to keep for Nix pure shell
# The separator is a semicolon
if [[ -n "${_NIX_KEEP}" ]]; then
shellArgs+=("--keep ${_NIX_KEEP//;/ --keep }")
fi
echo -e "${GREEN}Configuring ${pureDesc}${_NIX_ATTR:-default} Nix shell for target '${TARGET_OS}'...${NC}" > /dev/stderr
exec nix-shell ${shellArgs[@]} --run "$@" ${entryPoint}
fi