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python: add pyuserpaths function (#7758)

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Summary
    Make it get a list of installed interpreters, and add the
    relevant local (HOME) site-packages directory to PYTHONPATH.

    Reason
    To easily add all relevant paths, initially, and between upgrades.

Add check for PYTHONUSERBASE

    Summary
    Check for a non-standard install directory, use it if one
    exists, otherwise use ~/.local.

    Reason
    Allow users to specify their own installation directory, without
    affecting functionality.
This commit is contained in:
0b10 2020-03-02 13:38:44 +01:00 committed by GitHub
parent ed94e06dda
commit 72707d92b1
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2 changed files with 31 additions and 1 deletions
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3
plugins/python/README.md
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@ -11,7 +11,8 @@ plugins=(... python)
| Command | Description |
|------------------|---------------------------------------------------------------------------------|
| `ipython` | Runs the appropriate `ipython` version according to the activated virtualenv |
| `pyfind` | Finds .py files recursively in the current directory |
| `pyclean [dirs]` | Deletes byte-code and cache files from a list of directories or the current one |
| `pygrep <text>` | Looks for `text` in .py files |
| `ipython` | Runs the appropriate `ipython` version according to the activated virtualenv |
| `pyuserpaths` | Add --user site-packages to PYTHONPATH, for all installed python versions. |

29
plugins/python/python.plugin.zsh
View file

@ -11,6 +11,35 @@ function pyclean() {
find ${ZSH_PYCLEAN_PLACES} -depth -type d -name ".pytest_cache" -exec rm -r "{}" +
}
# Add the user installed site-packages paths to PYTHONPATH, only if the
# directory exists. Also preserve the current PYTHONPATH value.
# Feel free to autorun this when .zshrc loads.
function pyuserpaths() {
local targets=("python2" "python3") # bins
# Get existing interpreters.
local interps=()
for target in $targets; do
[ `command -v $target` ] && interps+=($target)
done
# Check for a non-standard install directory.
local user_base="${HOME}/.local"
[ $PYTHONUSERBASE ] && user_base=$PYTHONUSERBASE
# Add version specific paths, if:
# it exists in the filesystem;
# it isn't in PYTHONPATH already.
for interp in $interps; do
# Get minor release version.
local ver=`$interp -V 2>&1`
ver=`echo ${ver:7} | cut -d '.' -f 1,2` # The patch version is variable length, truncate it.
local site_pkgs="${user_base}/lib/python${ver}/site-packages"
[[ -d $site_pkgs && ! $PYTHONPATH =~ $site_pkgs ]] && export PYTHONPATH=${site_pkgs}:$PYTHONPATH
done
}
# Grep among .py files
alias pygrep='grep -r --include="*.py"'