nix-tree no longer works by default, does not contain a 'flake.nix', searching up

[sg-qwt]

x nix run 'nixpkgs#nix-tree' -- --version
nix-tree 0.5.0

x nix run 'nixpkgs#nix-tree'
path '/home/me/.local/state/nix/profile' does not contain a 'flake.nix', searching up
error: could not find a flake.nix file
nix-tree: Received ExitFailure 1 when running
Raw command: nix path-info --json --extra-experimental-features "nix-command flakes" /home/me/.local/state/nix/profile /var/run/current-system

> nix --version
nix (Nix) 2.24.10

I guess this is caused by the newer nix version?

nix-tree /var/run/current-system still works
So I have to use nix run 'nixpkgs#nix-tree' -- /var/run/current-system instead now.
Somewhere between the version, the default behavior changed so now I have to pass in current-system explicitly nowadays?

[utdemir]

Oh - I had no idea, thanks for reporting! Yeah, likely the behavior of Nix has changed at some point - as I don't think there was a change on nix-tree side. I'll have a look.

[utdemir]

Looked at this a bit - but I can't reproduce it on my system as I don't have a .local/state/nix/profile so nix-tree just skips it. I think this happens when you don't have a flake enabled profile, am I right?

For reference, here's the part where nix-tree finds your system and user profiles:

nix-tree/src/NixTree/Main.hs

Lines 109 to 117 in 1c7f4c5

	home <- getHomeDirectory
	nixXdgDirectory <- getXdgDirectory XdgState "nix/profile"
	roots <-
	filterM
	doesDirectoryExist
	[ home </> ".nix-profile",
	nixXdgDirectory,
	"/var/run/current-system"
	]

So - could you tell me what does your /home/me/.local/state/nix/profile look like? In other words, which path should nix-tree pass to nix path-info command to get information about your user profile?

[utdemir]

(I also asked this to NixOS Matrix channel as likely I only have today to work on it)

[sg-qwt]

Looked at this a bit - but I can't reproduce it on my system as I don't have a .local/state/nix/profile so nix-tree just skips it. I think this happens when you don't have a flake enabled profile, am I right?

For reference, here's the part where nix-tree finds your system and user profiles:

nix-tree/src/NixTree/Main.hs

Lines 109 to 117 in 1c7f4c5

	home <- getHomeDirectory
	nixXdgDirectory <- getXdgDirectory XdgState "nix/profile"
	roots <-
	filterM
	doesDirectoryExist
	[ home </> ".nix-profile",
	nixXdgDirectory,
	"/var/run/current-system"
	]

So - could you tell me what does your /home/me/.local/state/nix/profile look like? In other words, which path should nix-tree pass to nix path-info command to get information about your user profile?

My /home/me/.local/state/nix/profile is a directory.

/home/me/.local/state/nix/profile/
└── share
    └── emacs
        └── native-lisp
            └── 30.0.92-7824dc9f
                └── site-start-6962a3f8-8f4312e0.eln

I'm using flake based NixOS, but I never used profile.
nix profile list returns empty.

[utdemir]

@sg-qwt Thanks! So I was wrong with my flake hypothesis then.

When you say it's a directory, is it a plain directory, or a symlink to something under /nix/store? If it's a symlink, what happens when you run nix path-info --json PATH both against the directory itself ( /home/me/.local/state/nix/profile), and also the path it points to?

[sg-qwt]

@sg-qwt Thanks! So I was wrong with my flake hypothesis then.

When you say it's a directory, is it a plain directory, or a symlink to something under /nix/store? If it's a symlink, what happens when you run nix path-info --json PATH both against the directory itself ( /home/me/.local/state/nix/profile), and also the path it points to?

plain directory

[utdemir]

Ok - so the assumption on #71 was broken then. I'll continue from there.

[GrigorenkoPV]

I'm using flake based NixOS, but I never used profile.

I am curious how ~/.local/state/nix/profile/ got created then.

By the way, do you have anything else under ~/.local/state/nix/?

Does ~/.local/state/nix/profiles/profile exist?

Is ~/.local/state/nix a symlink?

[sg-qwt]

I'm using flake based NixOS, but I never used profile.

I am curious how ~/.local/state/nix/profile/ got created then.

By the way, do you have anything else under ~/.local/state/nix/?

Does ~/.local/state/nix/profiles/profile exist?

Is ~/.local/state/nix a symlink?

~/.local/state/nix is plain directory

> l ~/.local/state/nix
total 0
drwxr-xr-x 4 me users 0 Nov 27 03:17 .
drwxr-xr-x 5 me users 0 Dec 15 02:36 ..
drwxr-xr-x 3 me users 0 Nov 27 03:17 profile
drwxr-xr-x 2 me users 0 Dec 25 16:05 profiles

~/.local/state/nix/profiles/profile does NOT exist
all hm links under profiles directory

> l ~/.local/state/nix/profiles
total 23K
drwxr-xr-x 2 me users  0 Dec 25 16:05 .
drwxr-xr-x 4 me users  0 Nov 27 03:17 ..
lrwxrwxrwx 1 me users 20 Dec 25 15:56 home-manager -> home-manager-45-link
lrwxrwxrwx 1 me users 67 Nov  4 22:51 home-manager-10-link -> /nix/store/4ya9j1l0pva2l1ijbkvbkr9y02qdknqm-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  5 19:01 home-manager-11-link -> /nix/store/nm0ljf376ywr21b1598ci9gs16844g1p-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  5 19:08 home-manager-12-link -> /nix/store/8yrsysmfr96xwjsx2hf831jrijmw0gif-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  5 19:09 home-manager-13-link -> /nix/store/z9fdfc2mal1hqnls4ydwqv2glxfiys2f-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  5 19:31 home-manager-14-link -> /nix/store/py8z5vpkdrcy98qhpwyx2m6nb90d7iva-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  8 17:31 home-manager-15-link -> /nix/store/85hxj6lq89fxm5d82j0d3iicr8c1yn3x-home-manager-generation
lrwxrwxrwx 1 me users 67 Nov  8 17:37 home-manager-16-link -> /nix/store/vrqqxsn6jfqhf1z24js6hqq7128k8gi1-home-manager-generation

[GrigorenkoPV]

Ah, home manager is doing weird things. Okay.

Well, I guess checking that a path is a symlink (as I've suggested in #71 (comment)) should help. Maybe we should even add $XDG_STATE_HOME/nix/profiles/home-manager to the list.