envfs: init at 1.0.0

This commit is contained in:
Jörg Thalheim 2022-12-28 15:09:54 +01:00
parent 4d5535c90c
commit 741a0f5a7f
6 changed files with 125 additions and 0 deletions

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@ -1311,6 +1311,7 @@
./tasks/filesystems/btrfs.nix
./tasks/filesystems/cifs.nix
./tasks/filesystems/ecryptfs.nix
./tasks/filesystems/envfs.nix
./tasks/filesystems/exfat.nix
./tasks/filesystems/ext.nix
./tasks/filesystems/f2fs.nix

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@ -0,0 +1,51 @@
{ pkgs, config, lib, ... }:
let
cfg = config.services.envfs;
mounts = {
"/usr/bin" = {
device = "none";
fsType = "envfs";
options = [
"fallback-path=${pkgs.runCommand "fallback-path" {} ''
mkdir -p $out
ln -s ${pkgs.coreutils}/bin/env $out/env
ln -s ${config.system.build.binsh}/bin/sh $out/sh
''}"
];
};
"/bin" = {
device = "/usr/bin";
fsType = "none";
options = [ "bind" ];
};
};
in {
options = {
services.envfs = {
enable = lib.mkEnableOption (lib.mdDoc "Envfs filesystem") // {
description = lib.mdDoc ''
Fuse filesystem that returns symlinks to executables based on the PATH
of the requesting process. This is useful to execute shebangs on NixOS
that assume hard coded locations in locations like /bin or /usr/bin
etc.
'';
};
package = lib.mkOption {
type = lib.types.package;
description = lib.mdDoc "Which package to use for the envfs.";
default = pkgs.envfs;
defaultText = lib.mdDoc "pkgs.envfs";
};
};
};
config = lib.mkIf (cfg.enable) {
environment.systemPackages = [ cfg.package ];
# we also want these mounts in virtual machines.
fileSystems = if config.virtualisation ? qemu then lib.mkVMOverride mounts else mounts;
# We no longer need those when using envfs
system.activationScripts.usrbinenv = lib.mkForce "";
system.activationScripts.binsh = lib.mkForce "";
};
}

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@ -195,6 +195,7 @@ in {
engelsystem = handleTest ./engelsystem.nix {};
enlightenment = handleTest ./enlightenment.nix {};
env = handleTest ./env.nix {};
envfs = handleTest ./envfs.nix {};
envoy = handleTest ./envoy.nix {};
ergo = handleTest ./ergo.nix {};
ergochat = handleTest ./ergochat.nix {};

42
nixos/tests/envfs.nix Normal file
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@ -0,0 +1,42 @@
import ./make-test-python.nix ({ lib, pkgs, ... }:
let
pythonShebang = pkgs.writeScript "python-shebang" ''
#!/usr/bin/python
print("OK")
'';
bashShebang = pkgs.writeScript "bash-shebang" ''
#!/usr/bin/bash
echo "OK"
'';
in
{
name = "envfs";
nodes.machine.services.envfs.enable = true;
testScript = ''
start_all()
machine.wait_until_succeeds("mountpoint -q /usr/bin/")
machine.succeed(
"PATH=${pkgs.coreutils}/bin /usr/bin/cp --version",
# check fallback paths
"PATH= /usr/bin/sh --version",
"PATH= /usr/bin/env --version",
"PATH= test -e /usr/bin/sh",
"PATH= test -e /usr/bin/env",
# no stat
"! test -e /usr/bin/cp",
# also picks up PATH that was set after execve
"! /usr/bin/hello",
"PATH=${pkgs.hello}/bin /usr/bin/hello",
)
out = machine.succeed("PATH=${pkgs.python3}/bin ${pythonShebang}")
print(out)
assert out == "OK\n"
out = machine.succeed("PATH=${pkgs.bash}/bin ${bashShebang}")
print(out)
assert out == "OK\n"
'';
})

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@ -0,0 +1,28 @@
{ rustPlatform, lib, fetchFromGitHub, nixosTests }:
rustPlatform.buildRustPackage rec {
pname = "envfs";
version = "1.0.0";
src = fetchFromGitHub {
owner = "Mic92";
repo = "envfs";
rev = version;
hash = "sha256-aF8V1LwPGifFWoVxM0ydOnTX1pDVJ6HXevTxADJ/rsw=";
};
cargoHash = "sha256-kw56tbe5zvWY5bI//dUqR1Rlumz8kOG4HeXiyEyL0I0=";
passthru.tests = {
envfs = nixosTests.envfs;
};
postInstall = ''
ln -s envfs $out/bin/mount.envfs
ln -s envfs $out/bin/mount.fuse.envfs
'';
meta = with lib; {
description = "Fuse filesystem that returns symlinks to executables based on the PATH of the requesting process.";
homepage = "https://github.com/Mic92/envfs";
license = licenses.mit;
maintainers = with maintainers; [ mic92 ];
platforms = platforms.linux;
};
}

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@ -4405,6 +4405,8 @@ with pkgs;
envsubst = callPackage ../tools/misc/envsubst { };
envfs = callPackage ../tools/filesystems/envfs { };
er-patcher = callPackage ../tools/games/er-patcher { };
errcheck = callPackage ../development/tools/errcheck { };