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use_flake: add gcroot for inputs

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Jörg Thalheim 2020-12-25 17:29:44 +01:00
parent 24f58e2ed7
commit e19d62fc02
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2 changed files with 9 additions and 1 deletions
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4
README.md
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@ -134,11 +134,13 @@ $ echo "use nix" >> .envrc
$ direnv allow $ direnv allow
``` ```
## Experimental flakes support ## Flakes support
nix-direnv also comes with a flake alternative. The code is tested and works however nix-direnv also comes with a flake alternative. The code is tested and works however
since future nix versions might change their api regarding this feature we cannot since future nix versions might change their api regarding this feature we cannot
guarantee stability after an nix upgrade. guarantee stability after an nix upgrade.
Likewise `use_nix` the `use_flake` implementation will prevent garbage
collection of downloaded packages and also for flake inputs.
Save this file as `flake.nix`: Save this file as `flake.nix`:

6
direnvrc
View File

@ -55,6 +55,7 @@ use_flake() {
watch_file flake.lock watch_file flake.lock
local profile="$(direnv_layout_dir)/flake-profile" local profile="$(direnv_layout_dir)/flake-profile"
local flake="$(direnv_layout_dir)/flake"
local profile_rc="${profile}.rc" local profile_rc="${profile}.rc"
if [[ ! -e "$profile" if [[ ! -e "$profile"
@ -72,6 +73,11 @@ use_flake() {
echo "$tmp_profile_rc" > "$profile_rc" echo "$tmp_profile_rc" > "$profile_rc"
rm -f "$tmp_profile" "$tmp_profile"* rm -f "$tmp_profile" "$tmp_profile"*
_nix_add_gcroot "$drv" "$profile" _nix_add_gcroot "$drv" "$profile"
# also add garbage collection root for source
local flake_source=$(nix eval --impure --raw --expr 'builtins.getFlake (toString ./.)')
_nix_add_gcroot "$flake_source" "$flake"
log_status renewed cache log_status renewed cache
else else
log_status using cached dev shell log_status using cached dev shell