nix-shell does not work when bashCompletion is enabled #7611

vu3rdd · 2015-04-28T10:51:39Z

I am using nix-shell and the quick start example in the manual (step #6
listed here: https://nixos.org/nix/manual/) does not seem to work for
me:

[ram@nixos:~] nix-shell -p hello
these paths will be fetched (0.04 MiB ...

*** Downloading ....

[ram@nixos:~]$ hello
The program `hello' is currently not installed ...
...
[ram@nixos:~]$ exit

[ram@nixos:~]$

Note that the prompt string didn't change when we entered the nix-shell. 

If I do:

[ram@nixos:~]$ nix-shell -p hello --pure

[nix-shell:~]$ hello
Hello, world!

[nix-shell:~]$

Now, I figured that I have bashCompletion enabled in the /etc/nixos/configuration.nix.
programs.bash.enableCompletion = true;
If I comment this line out and do nixos-rebuild switch, then nix-shell works as expected (both with and without the -pure flag).

I believe this is a bug. nix-shell -v does not seem to show anything interesting w.r.t this particular behaviour, so not including the output of that here.

The text was updated successfully, but these errors were encountered:

peti · 2015-04-28T11:09:07Z

I cannot reproduce this error. On my system, everything works as expected:

[simons@latitude:~]$ nix-shell -p hello
these paths will be fetched (0.00 MiB download, 0.19 MiB unpacked):
  /nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10
fetching path ‘/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’...

*** Trying to download/patch ‘/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’

*** Step 1/1: downloading ‘http://hydra.nixos.org/nar/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’ to ‘/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 46674    0 46674    0     0  58861      0 --:--:-- --:--:-- --:--:-- 65553

[nix-shell:~]$ type -p hello
/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10/bin/hello

[nix-shell:~]$ hello
Hello, world!

Personally, I believe it's far more likely that the cause for this issue is @vu3rdd's ~/.bashrc setup than a bug in nix-shell. nix-shell doesn't care whether bash completion is enabled or not; it just sets up a bunch of environment variables and executes a shell. What this shell does, however, is to some extend dependent on what the user configured their shell to do at start-up.

vu3rdd · 2015-04-28T11:16:26Z

@peti I don't have a ~/.bashrc file on my home directory. If it can be of any help, here is my configuration.nix.

vu3rdd · 2015-04-28T11:21:14Z

@peti another data: Without the comment on programs.bash.enableCompletion = true;, I did a fresh install of nixos from the ISO with the same configuration file (I had to comment out the kernel 4.0 because I was installing stable). Now, this won't boot into xmonad. Now, I commented the enableCompletion line and did a nixos-rebuild switch and it boots into xmonad just fine.

Is there a way to see any logs of what is happening in the system or why it failed to boot into xmonad even though the configuration explicitly said so? Perhaps that may reveal something on the failure.

domenkozar · 2015-04-28T11:57:24Z

It may be related to another package that provides the bash completion. What do you have in environment.systemPackages?

vu3rdd · 2015-04-28T12:05:00Z

@domenkozar @peti It looks like it works just fine if I remove the bashCompletion package. What does the bashCompletion package do?

peti · 2015-04-28T12:35:35Z

@vu3rdd, can you please paste the complete output that you get when running nix-shell -p hello with bash completion enabled?

vu3rdd · 2015-04-28T13:31:13Z

@peti This is the output with bashCompletion in the systemPackages and programs.bash.enableCompletion = true; and nix-shell -v -p hello.
I also tried the log with bashCompletion removed from systemPackages and did a diff of the log file generated, but it is exactly the same.

evaluating file ‘/nix/store/b68f8byrg1ibybixhjl8s3c6vvk0y6ld-nix-1.8/share/nix/corepkgs/derivation.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/default.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/top-level/all-packages.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/adapters.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/build-support/trivial-builders.nix’
evaluating file ‘/home/ram/.nixpkgs/config.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/default.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/trivial.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/strings.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/strings-with-deps.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/sources.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/options.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/meta.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/debug.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/misc.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/systems.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/customisation.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/linux/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/generic/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/compression/gzip/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/servers/x11/xorg/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/licenses.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/platforms.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/linux/bootstrap/x86_64.nix’
|   evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/linux/bootstrap/i686.nix’
evaluating file ‘/nix/store/b68f8byrg1ibybixhjl8s3c6vvk0y6ld-nix-1.8/share/nix/corepkgs/fetchurl.nix’
evaluating file ‘/nix/store/b68f8byrg1ibybixhjl8s3c6vvk0y6ld-nix-1.8/share/nix/corepkgs/config.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/misc/patchelf/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/build-support/cc-wrapper/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/misc/binutils/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/zlib/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/build-support/fetchurl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/build-support/fetchurl/mirrors.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/compression/xz/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/os-specific/linux/paxctl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/glibc/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/glibc/common.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/os-specific/linux/kernel-headers/3.12.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/interpreters/perl/5.20/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/top-level/platforms.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/compilers/gcc/4.8/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/cloog/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/isl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/libelf/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/misc/coreutils/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/acl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/misc/texinfo/5.2.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/system/which/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/gettext/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/gmp/5.1.x.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/misc/gnum4/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/mpfr/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/libmpc/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/compression/bzip2/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/shells/bash/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/shells/bash/bash-4.3-patches.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/parsing/bison/3.x.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/attr/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/text/diffutils/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/misc/findutils/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/text/gawk/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/libsigsegv/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/tools/build-managers/gnumake/4.1/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/text/gnused/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/archivers/gnutar/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/text/gnugrep/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/pcre/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/text/gnupatch/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/applications/editors/ed/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/stdenv/common-path.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/applications/misc/hello/ex-2/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/tools/networking/curl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/openssl/default.nix’
evaluating file ‘/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/development/libraries/libssh2/default.nix’

peti · 2015-04-28T14:15:05Z

@vu3rdd, this is not what I need. Please configure your system with bash completion enabled, run nixos-rebuild switch, and then run nix-env -p hello and paste the output from that last command only.

vu3rdd · 2015-04-28T14:43:15Z

Here it is:

[ram@nixos:~]$ nix-shell -p hello
these paths will be fetched (0.05 MiB download, 0.21 MiB unpacked):
  /nix/store/jg990hzan73yksf8gghmri5iszdrr8mg-stdenv
  /nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10
fetching path ‘/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’...

*** Downloading ‘https://cache.nixos.org/nar/166y7i5irx8sgm1whwjbq32xj8cn86yxbw2qfgwr1ldi915wili6.nar.xz’ to ‘/nix/store/qbjjyf1s5lhc59vir6rj7j1zxzq4i6w4-hello-2.10’...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 40308  100 40308    0     0  19735      0  0:00:02  0:00:02 --:--:-- 25608

fetching path ‘/nix/store/jg990hzan73yksf8gghmri5iszdrr8mg-stdenv’...

*** Downloading ‘https://cache.nixos.org/nar/0arra09bx5p4kr5yc2n9vs9m1awkpjwk12idl108zafq7fad4vp9.nar.xz’ to ‘/nix/store/jg990hzan73yksf8gghmri5iszdrr8mg-stdenv’...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  7356  100  7356    0     0  10359      0 --:--:-- --:--:-- --:--:-- 10375


[ram@nixos:~]$

peti · 2015-04-28T15:00:54Z

OK. Now, the shell's prompt should say [nix-shell:~]$, but it does not. Clearly, you are not inside of a proper nix-shell environment at that point. What shell do you use? bash?

vu3rdd · 2015-04-28T15:04:10Z

Yes, I reported that in the original report too. Yes, I use bash.

vu3rdd · 2015-04-28T15:26:24Z

@peti are you able to reproduce it by including bashCompletion in the systemPackages and doing a nixos-rebuild switch and enabling the bash completion?

Just to summarize, there are 2 things in play:

adding bashCompletion package in the system Packages.
programs.bash.enableCompletion = true;

Leaving both on, does not enter into the nix-shell environment.
Leaving item 1 on and item 2 off, gets me into the shell.
Leaving item 1 off and item 2 on gets me into the shell.
Leaving item 1 off and item 2 off also gets me into the shell.

peti · 2015-04-28T15:52:31Z

Don't put bashCompletioninto systemPackages. Having programs.bash.enableCompletion = true is sufficient to enable it.

vu3rdd · 2015-04-28T16:37:01Z

Sure. Closing the bug. Thanks.

peti added the 0.kind: question Requests for a specific question to be answered label Apr 28, 2015

domenkozar added the 6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS label Apr 28, 2015

vu3rdd closed this as completed Apr 28, 2015

anderspapitto mentioned this issue Mar 24, 2016

programs.bash.enableCompletion breaks nix-shell #14172

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nix-shell does not work when bashCompletion is enabled #7611

nix-shell does not work when bashCompletion is enabled #7611

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

domenkozar commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

nix-shell does not work when bashCompletion is enabled #7611

nix-shell does not work when bashCompletion is enabled #7611

Comments

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

domenkozar commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

vu3rdd commented Apr 28, 2015

peti commented Apr 28, 2015

vu3rdd commented Apr 28, 2015