Python: Create Terminal error command noise included when default shell is fish

[breathe]

Issue Type: Bug

Executing Python: Create terminal gives this output in the open terminal

Welcome to fish, the friendly interactive shell
ncohen@breathe-book ~/s/DefectCorrectionsNotebook> 
source /Users/ncohen/anaconda3/bin/activate
~/anaconda3/bin/activate (line 5): 'return' outside of function definition
\. "$_CONDA_ROOT/etc/profile.d/conda.sh" || return $?
                                            ^
from sourcing file ~/anaconda3/bin/activate
        called on standard input

source: Error while reading file '/Users/ncohen/anaconda3/bin/activate'
ncohen@breathe-book ~/s/DefectCorrectionsNotebook> conda activate DCN
ncohen@breathe-book ~/s/DefectCorrectionsNotebook>                                                                                                                                                                      (DCN) 

The line noise above comes from the fact that anaconda3/bin/activate is sh/bash syntax and not compatible with fish.

I think I see roughtly two possible approaches to fixing this:

Option 1

Assume that the user has already run the appropriate conda.fish script within their shell setup context in order to make conda available for use within their shell. For example in my ~/.config/fish/config.fish I have

source ~/anaconda3/etc/fish/conf.d/conda.fish

Which ensures (for conda 4.4 and greater) that 'conda` is in my PATH and that 'conda activate' will work correctly for use from the fish shell.

If this tact is used, then I would expect Python: Create Terminal to look like this

Welcome to fish, the friendly interactive shell
ncohen@breathe-book ~/s/DefectCorrectionsNotebook> conda activate DCN
ncohen@breathe-book ~/s/DefectCorrectionsNotebook>                                                                                                                                                                      (DCN) 

Option 2

If its not desirable to assume the user has setup their shell appropriately for conda -- then I think it would be needed to invoke the correct conda.{sh,fish,...} setup script for each shell. The activate script would work with bash shell I think but if the user's shell is fish the output should look like this

ncohen@breathe-book ~/s/DefectCorrectionsNotebook> source ~/anaconda3/etc/fish/conf.d/conda.fish
ncohen@breathe-book ~/s/DefectCorrectionsNotebook> conda activate DCN

I believe that last sequence will only work with anaconda 4.4 and greater -the pre-4.4 version of conda.fish assumed that the conda command had already been added to the user PATH -- whereas post 4.4 configures PATH to include the appropriate conda binary such that conda binary's conda activate command will work correctly with the fish shell. Conda notes on the 4.4 changes

Extension version: 2019.3.6139
VS Code version: Code 1.32.3 (a3db5be9b5c6ba46bb7555ec5d60178ecc2eaae4, 2019-03-14T22:46:48.547Z)
OS version: Darwin x64 18.2.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 x 2800)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	16.00GB (3.02GB free)
Process Argv	.
Screen Reader	no
VM	0%

[avarun42]

Yes, this is quite annoying and happens every time I create a new terminal instance when working in a Python project. IMO there is no reason to be sourcing conda's bin/activate. The sane default is definitely for the user to setup their environment to already include conda's activate, and the python extension's only responsibility should be to activate the correct conda environment.

[caizixian]

I'm having the same issue and the path of conda can potentially be obtained from python.condaPath

[ion2014]

As for today the bug persists, if you just want to get rid of the anooying error just uncheck the python > terminal: Activate Environment settings and activate the environment manually.

[wayearn]

same bug

[RohanGautam]

Yes!!!!! This is so annoying

[lsorber]

See also this SO question, which was answered by @brettcannon. Unfortunately, even after conda init fish this still seems to be a problem.

Are there any workarounds (besides disabling automatic activation)?

[imyhxy]

any update? can we just execute conda activate envname with the source xxx things?

[brettcannon]

No specific update right now, but we do have plans to rework how we activate terminals via #11039 which will implicitly solve this.

And yes, you can do the activation manually. You can also launch VS Code from an activated environment and then turn off automatic activation as another work-around.

[karrtikr]

Unfortunately, even after conda init fish this still seems to be a problem.

With #18989 we now ensure source activate command is only sent if the shell is not initialized already (conda is not sourced), so this should no longer be an issue, closing this.