CODEWITHSUNDEEP
anaconda
mon
mon

Reputation: 22286

What is conda shell activation?

Anaconda Installing in silent mode says

The installer will not prompt you for anything, including setup of your shell to activate conda. To add this activation in your current shell session:

eval "$(command conda 'shell.bash' 'hook' 2> /dev/null)"

What does this line actually do and what files (eg. update bashrc or bash_profile, etc) are affected?

After having done this, what will happen when I open a bash shell or start a new login?

If there is a detailed documentation, please suggest.

Upvotes: 1

Views: 1465

Answers (1)

merv
merv

Reputation: 76950

TLDR; Conda shell activation is the process of defining some shell functions that facilitate activating and deactivating Conda environments, as well as some optional features such as updating PS1 to show the active environment.

In Conda v4.4, there was a major overhaul with how Conda manages environment isolation. Part of this was to manage activation of environments with a shell function conda() that takes arguments like activate or install, rather than having an activate script which users previously had to source activate.

The particular command in OP generates the bash code to define the conda() function, some auxiliary functions it needs, and environment variables, then evaluates this code in your current shell. The reason why this isn't a fixed script is that what Conda does here is generated on the fly using the conda entry point (i.e., Python code), and takes into account the configuration settings found in ~/.condarc.

You can completely inspect this code without evaluating it by just running

conda shell.bash hook

which will output the code as a string. The common elements everyone will see are the conda() function and its auxiliaries (e.g., starting with __conda_). Other aspects are configuration-dependent. For instance, if auto_activate_base is true (the default), then a conda activate base will be emitted at the end.

Upvotes: 2

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