My Unix config files and shell scripts, optimized for Fedora, Debian, macOS and Windows (in that order).
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# VirtualFish
# A Virtualenv wrapper for the Fish Shell based on Doug Hellman's virtualenvwrapper
if not set -q VIRTUALFISH_HOME
set -g VIRTUALFISH_HOME $HOME/.virtualenvs
end
if set -q VIRTUALFISH_COMPAT_ALIASES
function workon
if not set -q argv[1]
vf ls
else
vf activate $argv[1]
end
end
function deactivate
vf deactivate
end
function mktmpenv
vf tmp $argv
end
function mkvirtualenv
# Check if the first argument is an option to virtualenv
# if it is then the the last argument must be the DEST_DIR.
set -l idx 1
switch $argv[1]
case '-*'
set idx -1
end
# Extract the DEST_DIR and remove it from $argv
set -l env_name $argv[$idx]
set -e argv[$idx]
vf new $argv $env_name
end
function rmvirtualenv
vf rm $argv
end
function add2virtualenv
__vf_addpath $argv
end
function cdvirtualenv
vf cd $argv
end
function cdsitepackages
vf cdpackages $argv
end
end
function vf --description "VirtualFish: fish plugin to manage virtualenvs"
# copy all but the first argument to $scargs
set -l sc $argv[1]
set -l funcname "__vf_$sc"
set -l scargs
if test (count $argv) -gt 1
set scargs $argv[2..-1]
end
if functions -q $funcname
eval $funcname $scargs
else
echo "The subcommand $sc is not defined"
end
end
function __vf_activate --description "Activate a virtualenv"
# check arguments
if [ (count $argv) -lt 1 ]
echo "You need to specify a virtualenv."
return 1
end
if not [ -d $VIRTUALFISH_HOME/$argv[1] ]
echo "The virtualenv $argv[1] does not exist."
echo "You can create it with mkvirtualenv."
return 2
end
#Check if a different env is being used
if set -q VIRTUAL_ENV
vf deactivate
end
emit virtualenv_will_activate
emit virtualenv_will_activate:$argv[1]
set -gx VIRTUAL_ENV $VIRTUALFISH_HOME/$argv[1]
set -g _VF_EXTRA_PATH $VIRTUAL_ENV/bin
set -gx PATH $_VF_EXTRA_PATH $PATH
# hide PYTHONHOME
if set -q PYTHONHOME
set -g _VF_OLD_PYTHONHOME $PYTHONHOME
set -e PYTHONHOME
end
emit virtualenv_did_activate
emit virtualenv_did_activate:(basename $VIRTUAL_ENV)
end
function __vf_deactivate --description "Deactivate the currently-activated virtualenv"
emit virtualenv_will_deactivate
emit virtualenv_will_deactivate:(basename $VIRTUAL_ENV)
# find elements to remove from PATH
set to_remove
for i in (seq (count $PATH))
if contains $PATH[$i] $_VF_EXTRA_PATH
set to_remove $to_remove $i
end
end
# remove them
for i in $to_remove
set -e PATH[$i]
end
# restore PYTHONHOME
if set -q _VF_OLD_PYTHONHOME
set -gx PYTHONHOME $_VF_OLD_PYTHONHOME
set -e _VF_OLD_PYTHONHOME
end
emit virtualenv_did_deactivate
emit virtualenv_did_deactivate:(basename $VIRTUAL_ENV)
set -e VIRTUAL_ENV
end
function __vf_new --description "Create a new virtualenv"
emit virtualenv_will_create
set envname $argv[-1]
set -e argv[-1]
virtualenv $argv $VIRTUALFISH_HOME/$envname
set vestatus $status
if begin; [ $vestatus -eq 0 ]; and [ -d $VIRTUALFISH_HOME/$envname ]; end
vf activate $envname
emit virtualenv_did_create
emit virtualenv_did_create:(basename $VIRTUAL_ENV)
else
echo "Error: The virtualenv wasn't created properly."
echo "virtualenv returned status $vestatus."
return 1
end
end
function __vf_rm --description "Delete a virtualenv"
if not [ (count $argv) -eq 1 ]
echo "You need to specify exactly one virtualenv."
return 1
end
if begin; set -q VIRTUAL_ENV; and [ $argv[1] = (basename $VIRTUAL_ENV) ]; end
echo "You can't delete a virtualenv you're currently using."
return 1
end
echo "Removing $VIRTUALFISH_HOME/$argv[1]"
rm -rf $VIRTUALFISH_HOME/$argv[1]
end
function __vf_ls --description "List all of the available virtualenvs"
pushd $VIRTUALFISH_HOME
for i in */bin/python
echo $i
end | sed "s|/bin/python||"
popd
end
function __vf_cd --description "Change directory to currently-activated virtualenv"
if set -q VIRTUAL_ENV
cd $VIRTUAL_ENV
else
echo "Cannot locate an active virtualenv."
end
end
function __vf_cdpackages --description "Change to the site-packages directory of the active virtualenv"
vf cd
cd lib/python*/site-packages
end
function __vf_connect --description "Connect this virtualenv to the current directory"
if set -q VIRTUAL_ENV
basename $VIRTUAL_ENV > $VIRTUALFISH_ACTIVATION_FILE
else
echo "No virtualenv is active."
end
end
function __vf_tmp --description "Create a temporary virtualenv that will be removed when deactivated"
set -l env_name (printf "%s%.4x" "tempenv-" (random) (random) (random))
set -g VF_TEMPORARY_ENV
# Use will_deactivate here so that $VIRTUAL_ENV is available.
function __vf_tmp_remove --on-event virtualenv_will_deactivate:$env_name
echo "Removing $VIRTUAL_ENV"
rm -rf $VIRTUAL_ENV
set -e VF_TEMPORARY_ENV
end
# Ensure that the virtualenv gets deleted even if we close the shell w/o
# explicitly deactivating.
function __vfsupport_remove_temp_env_on_exit --on-process %self
if set -q VF_TEMPORARY_ENV
vf deactivate # the deactivate handler will take care of removing it
end
end
vf new $argv $env_name
end
function __vf_addpath --description "Adds a path to sys.path in this virtualenv"
if set -q VIRTUAL_ENV
set -l site_packages (eval "$VIRTUAL_ENV/bin/python -c 'import distutils; print(distutils.sysconfig.get_python_lib())'")
set -l path_file $site_packages/_virtualenv_path_extensions.pth
set -l remove 0
if test $argv[1] = "-d"
set remove 1
set -e argv[1]
end
if not test -f $path_file
echo "import sys; sys.__plen = len(sys.path)" > $path_file
echo "import sys; new=sys.path[sys.__plen:]; del sys.path[sys.__plen:]; p=getattr(sys,'__egginsert',0); sys.path[p:p]=new; sys.__egginsert = p+len(new)" >> $path_file
end
for pydir in $argv
set -l absolute_path (eval "$VIRTUAL_ENV/bin/python -c 'import os,sys; sys.stdout.write(os.path.abspath(\"$pydir\")+\"\n\")'")
if not test $pydir = $absolute_path
echo "Warning: Converting \"$pydir\" to \"$absolute_path\"" 1>&2
end
if test $remove -eq 1
sed -i.tmp "\:^$absolute_path\$: d" "$path_file"
else
sed -i.tmp '1 a\
'"$absolute_path"'
' "$path_file"
end
rm -f "$path_file.tmp"
end
return 0
else
echo "No virtualenv is active."
end
end
################
# Autocomplete
# Based on https://github.com/zmalltalker/fish-nuggets/blob/master/completions/git.fish
begin
function __vfcompletion_needs_command
set cmd (commandline -opc)
if test (count $cmd) -eq 1 -a $cmd[1] = 'vf'
return 0
end
return 1
end
function __vfcompletion_using_command
set cmd (commandline -opc)
if test (count $cmd) -gt 1
if test $argv[1] = $cmd[2]
return 0
end
end
return 1
end
# add completion for subcommands
for sc in (functions -a | sed -n '/__vf_/{s///g;p;}')
set -l helptext (functions "__vf_$sc" | head -n 1 | sed -E "s|.*'(.*)'.*|\1|")
complete -x -c vf -n '__vfcompletion_needs_command' -a $sc -d $helptext
end
complete -x -c vf -n '__vfcompletion_using_command activate' -a "(vf ls)"
complete -x -c vf -n '__vfcompletion_using_command rm' -a "(vf ls)"
if set -q VIRTUALFISH_COMPAT_ALIASES
complete -x -c workon -a "(vf ls)"
complete -x -c rmvirtualenv -a "(vf ls)"
end
end