conda-zsh-completion/_conda

#compdef conda
#description:conda package manager

local state line context
local -A opt_args

__conda_envs(){

    local -a envs
    envs=($( conda info -e | sed "1,2d" | cut -f1 -d' '))
    _describe -t envs 'conda environments' envs

}

__conda_packages_search(){
    local -a packages
    packages=($(conda search --use-index-cache --json |
    python -c "
import json, sys
parsed = json.load(sys.stdin)
for k in parsed.keys():
    print(k)
        "))
    _describe -t packages 'available packages' packages
}

__conda_channels(){

    local -a channels
    channels=(default system)
    _describe -t channels 'conda channels' channels

}

local -a opts
opts=(
    '(-h --help)'{-h,--help}'[show this help message and exit]'
    '(-v --version)'{-v,--version}'[show program''s version number and exit]'
)

_arguments -C $opts \
           ': :->command' \
           '*:: :->subcmd'

case $state in
(command)
    local -a package maint environment help config special
    package=(
        search:'Search for packages and display their information.'
        install:'Install a list of packages into a specified conda environment.'
    )
    maint=(
        update:'Update conda packages.'
        clean:'Remove unused packages and caches.'
    )
    environment=(
        info:'Display information about current conda install.'
        create:'Create a new conda environment from a list of specified packages.'
        list:'List linked packages in a conda environment.'
        remove:'Remove a list of packages from a specified conda environment.'
    )
    help=(
        help:'Displays a list of available conda commands and their help strings.'
    )
    config=(
        config:'Modify configuration values in .condarc.'
    )
    special=(
        run:'Launches an application installed with Conda.'
        init:'Initialize conda into a regular environment. (DEPRECATED)'
        package:'Low-level conda package utility. (EXPERIMENTAL)'
        bundle:'Create or extract a "bundle package" (EXPERIMENTAL)'
    )
    _describe -t package_commands "package commands" package
    _describe -t maint_commands "maint commands" maint
    _describe -t environment_commands "environment commands" environment
    _describe -t help_commands "help commands"  help
    _describe -t config_commands "config commands"  config
    _describe -t special_commands "special commands"  special
    ;;
(subcmd)
    case ${line[1]} in
    (install)
        _arguments '(-n --name=)'{-n,--name=}'[install into given conda environment]:environment:__conda_envs' \
                   '(-h --help)'{-h,--help}'[show the help message and exit]' \
                   '--revision[revert to the specified revision]:revision' \
                   '(-y --yes)'{-y,--yes}'[do not ask for confirmation]' \
                   '--dry-run[only display what would have been done]' \
                   '--file[read package versions from file]:file:_path_files' \
                   '--unknown[use index metadata from the local package cache]' \
                   '--no-deps[do not install dependencies]' \
                   '(-m --mkdir)'{-m,--mkdir}'[create prefix directory if necessary]' \
                   '--use-index-cache[use cache of channel index files]' \
                   '--use-local[use locally built packages]' \
                   '--offline[offline mode, don''t connect to internet]' \
                   '--no-pin[ignore pinned file]' \
                   '(-c --channel)'{-c,--channel}'[additional channel to search for packages]:channel:__conda_channels'\
                   '--override-channels [do not search default or .condarc channels]' \
                   '(-p --prefix)'{-p,--prefix}'[full path to environment prefix]:path:_path_files' \
                   '(-q --quiet)'{-q,--quiet}'[do not display progress bar]'\
                   '--copy[Install all packages using copies instead of hard- or soft-linking]' \
                   '--alt-hint[Use an alternate algorithm to generate an unsatisfiable hint]' \
                   '--json[report all output as json.]' \
                   '*:packages:__conda_packages_search' \
        ;;
    (*)
        #_arguments -C $opts
        _path_files
        ;;
    esac
    ;;
esac