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-rw-r--r--overlays/persistent-nix-shell/default.nix19
-rw-r--r--overlays/persistent-nix-shell/persistent-nix-shell20
2 files changed, 39 insertions, 0 deletions
diff --git a/overlays/persistent-nix-shell/default.nix b/overlays/persistent-nix-shell/default.nix
new file mode 100644
index 00000000..60396335
--- /dev/null
+++ b/overlays/persistent-nix-shell/default.nix
@@ -0,0 +1,19 @@
1final: prev: {
2 persistent-nix-shell = prev.stdenv.mkDerivation {
3 name = "persistent-nix-shell";
4 src = ./persistent-nix-shell;
5
6 phases = [ "buildPhase" "installPhase" ];
7
8 inherit (final) zsh;
9
10 buildPhase = ''
11 substituteAll $src persistent-nix-shell
12 '';
13
14 installPhase = ''
15 install -m 0755 -D -t $out/bin \
16 persistent-nix-shell
17 '';
18 };
19}
diff --git a/overlays/persistent-nix-shell/persistent-nix-shell b/overlays/persistent-nix-shell/persistent-nix-shell
new file mode 100644
index 00000000..a17f6de6
--- /dev/null
+++ b/overlays/persistent-nix-shell/persistent-nix-shell
@@ -0,0 +1,20 @@
1#!@zsh@/bin/zsh
2
3set -e
4
5gcrootsDir=${PWD}/.nix-gc-roots
6
7if [[ ${#@} -ge 1 ]]; then
8 shellFile=${1}
9 shift
10else
11 shellFile=${PWD}/shell.nix
12fi
13
14set -x
15mkdir -p ${gcrootsDir}
16nix-instantiate ${shellFile} --indirect --add-root ${gcrootsDir}/shell.drv
17nix-store --indirect --add-root ${gcrootsDir}/shell.dep --realise $(nix-store --query --references ${gcrootsDir}/shell.drv)
18set +x
19
20exec nix-shell $(readlink ${gcrootsDir}/shell.drv) ${@}