nixos/scripts/installers/direnv.sh

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#!/usr/bin/env bash
#
# A good old bash | curl script for direnv.
#
set -euo pipefail
{ # Prevent execution if this script was only partially downloaded
log() {
echo "[installer] $*" >&2
}
die() {
log "$@"
exit 1
}
at_exit() {
ret=$?
if [[ $ret -gt 0 ]]; then
log "the script failed with error $ret.\n" \
"\n" \
"To report installation errors, submit an issue to\n" \
" https://github.com/direnv/direnv/issues/new/choose"
fi
exit "$ret"
}
trap at_exit EXIT
kernel=$(uname -s | tr "[:upper:]" "[:lower:]")
case "${kernel}" in
mingw*)
kernel=windows
;;
esac
case "$(uname -m)" in
x86_64)
machine=amd64
;;
i686 | i386)
machine=386
;;
aarch64 | arm64)
machine=arm64
;;
*)
die "Machine $(uname -m) not supported by the installer.\n" \
"Go to https://direnv for alternate installation methods."
;;
esac
log "kernel=$kernel machine=$machine"
: "${use_sudo:=}"
: "${bin_path:=}"
if [[ -z "$bin_path" ]]; then
log "bin_path is not set, you can set bin_path to specify the installation path"
log "e.g. export bin_path=/path/to/installation before installing"
log "looking for a writeable path from PATH environment variable"
for path in $(echo "$PATH" | tr ':' '\n'); do
if [[ -w $path ]]; then
bin_path=$path
break
fi
done
fi
if [[ -z "$bin_path" ]]; then
die "did not find a writeable path in $PATH"
fi
echo "bin_path=$bin_path"
if [[ -n "${version:-}" ]]; then
release="tags/${version}"
else
release="latest"
fi
echo "release=$release"
log "looking for a download URL"
download_url=$(
curl -fL "https://api.github.com/repos/direnv/direnv/releases/$release" \
| grep browser_download_url \
| cut -d '"' -f 4 \
| grep "direnv.$kernel.$machine"
)
echo "download_url=$download_url"
log "downloading"
curl -o "$bin_path/direnv" -fL "$download_url"
chmod a+x "$bin_path/direnv"
cat <<DONE
The direnv binary is now available in:
$bin_path/direnv
The last step is to configure your shell to use it. For example for bash, add
the following lines at the end of your ~/.bashrc:
eval "\$(direnv hook bash)"
Then restart the shell.
For other shells, see https://direnv.net/docs/hook.html
Thanks!
DONE
}