NixOS pkgs Brackets

danbst · June 16, 2020, 7:18pm

sorry, had to check. Should be

nix-shell '<nixpkgs>' --pure -p brackets --run env

igel · June 16, 2020, 7:47pm

do I understand you correctly that I have to check all vars from user-env one by one to find the one var with causes brackets to crash?

danbst · June 16, 2020, 8:10pm

yes, correct. You can do slightly faster by using the manual envvar binary search Given this is a very common issue, I’d like to have this “environment-git-bisect” as a tool… but we are not there yet

DamienCassou · June 16, 2020, 8:17pm

Isn’t the message

Locale not supported by C library.

suspicious?

igel · June 16, 2020, 8:22pm

LANG=en_DE.UTF-8

en and DE is ok, or?

locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_DE.UTF-8
LC_CTYPE=“en_DE.UTF-8”
LC_NUMERIC=“en_DE.UTF-8”
LC_TIME=“en_DE.UTF-8”
LC_COLLATE=“en_DE.UTF-8”
LC_MONETARY=“en_DE.UTF-8”
LC_MESSAGES=“en_DE.UTF-8”
LC_PAPER=“en_DE.UTF-8”
LC_NAME=“en_DE.UTF-8”
LC_ADDRESS=“en_DE.UTF-8”
LC_TELEPHONE=“en_DE.UTF-8”
LC_MEASUREMENT=“en_DE.UTF-8”
LC_IDENTIFICATION=“en_DE.UTF-8”
LC_ALL=

igel · June 17, 2020, 9:08am

Hello danbst,

sorry but still I would like to get some more hints.

nix-env -i brackets

warning: name collision in input Nix expressions, skipping '/home/ae/.nix-defexpr/channels_root/nixos'
warning: there are multiple derivations named 'brackets-1.9'; using the first one
installing 'brackets-1.9'
building '/nix/store/qq6bx1vfga215xbhq533398hc9x0nfgv-user-environment.drv'...
created 2198 symlinks in user environment

ls -lah $(which brackets )
lrwxrwxrwx 1 root root 69 Jan 1 1970 /home/ae/.nix-profile/bin/brackets -> /nix/store/cf2klajdda4brmlgvrzk275f3lnjgb58-brackets-1.9/bin/brackets

but

/run/current-system/sw/bin/nix run -f '<nixpkgs>' -i brackets --keep COLORFGBG -c brackets

/nix/store/cf2klajdda4brmlgvrzk275f3lnjgb58-brackets-1.9/bin/brackets: line 8: readlink: command not found
/nix/store/cf2klajdda4brmlgvrzk275f3lnjgb58-brackets-1.9/bin/brackets: line 10: dirname: command not found
/nix/store/cf2klajdda4brmlgvrzk275f3lnjgb58-brackets-1.9/bin/brackets: line 20: /Brackets: No such file or directory

which is the same result like without any var kept:
nix run -f '<nixpkgs>' -i brackets -c brackets

Are there env variables which have to be provided or how to unterstand the resulting errors?

igel · June 17, 2020, 10:44am

Hello danbst,

the result of
strace brackets

recvfrom(3, "SelectionBox.foreground:\t#232627"..., 10012, 0, NULL, NULL) = 10012
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xfffffffc065e7aa4} ---
+++ killed by SIGSEGV (core dumped) +++

How to figure out where I can start - what to look for?

Could the locale error hint to a problem (“locale: Cannot set LC_CTYPE”)?

danbst · June 17, 2020, 1:20pm

try also to --keep PATH

igel · June 17, 2020, 1:57pm

thanks for you help

I have issues with the nixos-rebuild switch → that why I cannot get brackets out of configuration.nix
[Nixos-rebuild switch vs build vs boot - NetworkManager-wait-online.service fails)

even that I installed brackets via nix-env

nix-env -q

brackets-1.9
home-manager-path
lighttable-0.8.1
run-0.7.1

sudo brackets

lets open brackets with the UTF-8 error (like in the screenshot above) and

[0617/155125:ERROR:sandbox_linux.cc(130)] InitializeSandbox() called with multiple threads in process gpu-process

I tested all vars which are different but allways exit code is 1 → permission denied (-> installed in configuration via root ).

How to read out the current configuration of the system (becasue switch is not working and the file is overwritten in /etc/nixos/ )

danbst · June 17, 2020, 3:35pm

so, /etc/nixos/configuration.nix is overwritten? Unless you did any backups, you’re in trouble NixOS doesn’t backup that file for you.

As for your issue - it is more of a warning, not a failed switch. rebuild switch consists of 2 phases - build and activate, and error just says some services were not activated. But it should take brackets out of system-wide installment.

which envvar causes segfault?

igel · June 17, 2020, 5:06pm

fact - brackets is not in the current failed switch configuration but I can open it with sudo brackets.
I cannot see that the switch worked because the is no now generation (and switch -p “name” is not the either)

idenpended of all env-Vars the exitcode is always 1 (but Segmentation fault (core dumped) is ecitcode 139).

if I execute brackets → 139, if I excecute nix run -f '<nixpkgs>' -i brackets --keep PATH -c brackets it is 1 [permission denied]

brackets is not anymore in the current configuration.nix file but as you see, the system has kept it.

do I have to garbage collect or so ?

(there are some stange things on this nixos system - e.g. DHCP is set to false but now and then after bootup it permanetly tries and fails to setup dhcp!?)

danbst · June 17, 2020, 6:15pm

NixOS has some hacks to make sudo behave a bit different. If you have a package installed only as a user, then sudo brackets will run your user’s binary, not root’s. Try to sudo su - and then run brackets – it should be absent.

yes, but… Would you like to find out which envvar causes segfault?

the -i --keep PATH makes your environment pristine, clear
segfault is not reproduced in this clear environment, so it must be some environment variable causes it. Be it QT, or locale, or LD_*, or drivers, or XDG_* or whatnot - you have to figure out, as this is “impurity”, a thing we try to avoid in Nix/NixOS

You have network manager – maybe it tries to dhcp?

This indicates nothing had changed. Dummy rebuild, when this happens switch does only activate step.

igel · June 17, 2020, 7:53pm

dummy rebuild - mh ok. I will take care about that.

according to the error theit will be no new generation created:

Jun 18 09:08:00 nixos nixos[12970]: switching to system configuration /nix/store/jwxq8lpb8jg58vakld6sn4sx2c50xssb-nixos-system-nixos-20.03.2157.db31e48c5c8 failed (status 4)

I have network manager – but why does it tries to dhcp if it is set to false? Should I use something else/better (what alternatives are there in nixos)?

you are right, with su there is no brackets

I tested all vars additionally to PATH (via python subprocess) and all have exiscode 1, so the permission issue.

I’m not sure if I understood how to test it the right way
– if I only add --keep PATH it end with the error - I would expect that this most simple scenario shurt run, no?

danbst · June 18, 2020, 2:41pm

Ok, I see that there are too many variables required to actually run brackets. I don’t actually know how to help here, maybe you should write a script which tried all combinations of variables in loop and tests if brackets actually starts with those vars…

igel · June 18, 2020, 3:59pm

Hello danbst,
ok, i will try all different var combinations.

with some changes in configuration.nix sudo brackets opens without an error.

why does it open with sudo anyway when it fails in user env?

danbst · June 18, 2020, 10:13pm

I’m not sure, but sudo restricts environment – removes many envvars, one of which may be the culprit.

igel · June 19, 2020, 3:34pm

Hello danbst,

on question (back to the roots)
How is a “brocken” path possible if I set up a clean new nixos / managed the user env with home-manager?

I did not modify any path variable (intentionally)

danbst · June 19, 2020, 7:45pm

I don’t quite understand what are you talking about, can you tell more details? What’s the error?

igel · June 20, 2020, 5:28am

Hello danbst,
I did not define or change env/path variables.
All I did was setting up a fresh nixos installation (with home-manager).

that would mean that the issues to be not able to start brackets (e.g. env variables) only come from the installation of nix pkgs, right?

danbst · June 20, 2020, 5:34am

correct, but note also that I use XFCE desktop manager, and you may be using a different one and you may use different drivers, so our environment even if both installed “cleanly” have some differences.