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create a function for all pre-flight checks

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This commit is contained in:
Bryan Bennett 2022-04-03 20:18:59 -04:00
parent fef7340826
commit 7133709885
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GPG key ID: EF90E3E98B8F5C0B
1 changed files with 35 additions and 4 deletions
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39
direnvrc
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@ -2,11 +2,38 @@
REQUIRED_DIRENV_VERSION="2.21.3"
_nix_direnv_preflight () {
if [[ -z "$direnv" ]]; then
printf '%s\n' "\$direnv environment variable was not defined. Was this script run inside direnv?"
exit 1
fi
if ! has direnv_version || ! direnv_version "$REQUIRED_DIRENV_VERSION" 2>/dev/null; then
printf '%s\n' "nix-direnv: base direnv version is older than the required v$REQUIRED_DIRENV_VERSION." >&2
exit 1
fi
if [[ -z ${NIX_BIN_PREFIX:-} ]]; then
NIX_BIN_PREFIX=$(command -v nix-shell)
NIX_BIN_PREFIX="${NIX_BIN_PREFIX%/*}/"
fi
if ! has direnv_version || ! direnv_version "$REQUIRED_DIRENV_VERSION" 2>/dev/null; then
log_status "nix-direnv: base direnv version is older than the required v$REQUIRED_DIRENV_VERSION."
exit 1
fi
if ! "${NIX_BIN_PREFIX}nix-shell" --extra-experimental-features '' --version 2>/dev/null >&2; then
log_status "nix-direnv: nix version is older than the required 2.4."
exit 1
fi
local layout_dir
layout_dir=$(direnv_layout_dir)
if [[ ! -d "$layout_dir" ]]; then
mkdir -p "$layout_dir"
fi
}
# Usage: nix_direnv_version <version_at_least>
#
@ -117,6 +144,8 @@ nix_direnv_watch_file() {
}
use_flake() {
_nix_direnv_preflight
flake_expr="${1:-.}"
flake_dir="${flake_expr%#*}"
@ -225,6 +254,8 @@ _nix_extract_direnv() {
use_nix() {
local path layout_dir
_nix_direnv_preflight
path=$("${NIX_BIN_PREFIX}nix-instantiate" --find-file nixpkgs)
layout_dir=$(direnv_layout_dir)
local experimental_flags=()