97 lines
2.7 KiB
Plaintext
97 lines
2.7 KiB
Plaintext
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# virtualenv activation module
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# Activate with `overlay use activate.nu`
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# Deactivate with `deactivate`, as usual
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#
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# To customize the overlay name, you can call `overlay use activate.nu as foo`,
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# but then simply `deactivate` won't work because it is just an alias to hide
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# the "activate" overlay. You'd need to call `overlay hide foo` manually.
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export-env {
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def is-string [x] {
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($x | describe) == 'string'
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}
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def has-env [...names] {
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$names | each {|n|
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$n in $env
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} | all {|i| $i == true}
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}
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# Emulates a `test -z`, but better as it handles e.g 'false'
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def is-env-true [name: string] {
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if (has-env $name) {
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# Try to parse 'true', '0', '1', and fail if not convertible
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let parsed = (do -i { $env | get $name | into bool })
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if ($parsed | describe) == 'bool' {
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$parsed
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} else {
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not ($env | get -i $name | is-empty)
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}
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} else {
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false
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}
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}
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let virtual_env = '__VIRTUAL_ENV__'
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let bin = '__BIN_NAME__'
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let is_windows = ($nu.os-info.family) == 'windows'
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let path_name = (if (has-env 'Path') {
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'Path'
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} else {
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'PATH'
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}
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)
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let venv_path = ([$virtual_env $bin] | path join)
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let new_path = ($env | get $path_name | prepend $venv_path)
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# If there is no default prompt, then use the env name instead
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let virtual_env_prompt = (if ('__VIRTUAL_PROMPT__' | is-empty) {
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($virtual_env | path basename)
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} else {
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'__VIRTUAL_PROMPT__'
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})
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let new_env = {
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$path_name : $new_path
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VIRTUAL_ENV : $virtual_env
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VIRTUAL_ENV_PROMPT : $virtual_env_prompt
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}
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let new_env = (if (is-env-true 'VIRTUAL_ENV_DISABLE_PROMPT') {
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$new_env
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} else {
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# Creating the new prompt for the session
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let virtual_prefix = $'(char lparen)($virtual_env_prompt)(char rparen) '
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# Back up the old prompt builder
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let old_prompt_command = (if (has-env 'PROMPT_COMMAND') {
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$env.PROMPT_COMMAND
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} else {
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''
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})
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let new_prompt = (if (has-env 'PROMPT_COMMAND') {
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if 'closure' in ($old_prompt_command | describe) {
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{|| $'($virtual_prefix)(do $old_prompt_command)' }
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} else {
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{|| $'($virtual_prefix)($old_prompt_command)' }
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}
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} else {
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{|| $'($virtual_prefix)' }
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})
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$new_env | merge {
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PROMPT_COMMAND : $new_prompt
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VIRTUAL_PREFIX : $virtual_prefix
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}
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})
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# Environment variables that will be loaded as the virtual env
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load-env $new_env
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}
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export alias pydoc = python -m pydoc
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export alias deactivate = overlay hide activate
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