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|
#! /usr/bin/env sh
_pre_cache_log() {
printf "pre-cache: %s\n" "$1"
}
_pre_cache_preflight() {
set -eu
_nix_direnv_preflight
REPO="%DEVSHELLS_REPO%"
system="x86_64-linux"
cache_dir="$XDG_CACHE_HOME/pre_cache"
[ -d "$cache_dir" ] || mkdir --parents "$cache_dir"
repo_ref="%DEVSHELLS_REPO_REF%"
final_cache="$cache_dir/$repo_ref"
if ! [ -d "$final_cache" ]; then
_pre_cache_log "Cache dir invalidated"
# There is not yet a final cache directory, so the ref must have changed.
# Therefore we delete the whole cache directory, so we invalidate old cached shells.
set -u
rm --recursive "$cache_dir"
mkdir --parents "$final_cache"
fi
}
_pre_cache_load_shell() {
lang="$1"
lang_cache="$final_cache/$lang"
if ! [ -f "$lang_cache" ]; then
tmp_profile="$final_cache/__tmp_profile"
profile="$final_cache/__profile"
# It does not already exists, we need to evaluate it.
_nix print-dev-env --profile "$tmp_profile" "$REPO#$lang" >"$lang_cache"
_nix_add_gcroot "$tmp_profile" "$profile"
rm "$tmp_profile" "$tmp_profile"*
fi
_pre_cache_log "Loaded dev-shell for $lang."
_nix_import_env "$lang_cache"
}
_pre_cache_build_shells() {
installables=""
for lang in "$@"; do
new_part="$REPO#devShells.$system.$lang"
if [ -z "$installables" ]; then
installables="$new_part"
else
installables="$installables $new_part"
fi
done
# We want shell-spliting
# shellcheck disable=SC2086
_nix build --no-link $installables
}
pre_cache_load() {
_pre_cache_preflight
_pre_cache_build_shells "$@"
for lan in "$@"; do
_pre_cache_load_shell "$lan"
done
}
# vim: ft=sh
|
