README: clarify shell setup instructions using the new --install option

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@ -69,6 +69,7 @@ This project was forked from [rbenv](https://github.com/rbenv/rbenv) and
* [Using Pyenv without shims](#using-pyenv-without-shims)
* [Running nested shells from Python-based programs](#running-nested-shells-from-python-based-programs)
* [Environment variables](#environment-variables)
* [Manual shell setup](#manual-shell-setup)
* **[Development](#development)**
* [Contributing](#contributing)
* [Version History](#version-history)
@ -177,134 +178,29 @@ which does install native Windows Python versions.
----
The below setup should work for the vast majority of users for common use cases.
See [Advanced configuration](#advanced-configuration) for details and more configuration options.
See [Advanced configuration](#advanced-configuration)
and specifically [Manual shell setup](#manual-shell-setup) for details and more configuration options.
If `pyenv` is already on `PATH`, you can configure the relevant shell startup
files automatically:
To add the suggested setup code to the startup files of the running shell,
run `<path/to/pyenv> --install`.
Specifically:
* If you installed Pyenv with the installer script:
```sh
~/.pyenv/bin/pyenv init --install
```
* If you installed Pyenv with Homebrew:
```sh
pyenv init --install
```
If `pyenv` is not on `PATH` yet, run the same command through the `pyenv`
executable in your chosen installation directory.
This uses the same shell detection as `pyenv init`. If a startup file already
contains Pyenv-related configuration, the command refuses to edit it; review the
file manually and run `pyenv init <shell>` to see the suggested setup.
For Bash, avoid the automatic `--install` path if your `BASH_ENV` points to
`.bashrc`; use the manual Bash instructions below so the `eval "$(pyenv init - bash)"`
line only goes in your login startup file.
#### Bash
<details>
Stock Bash startup files vary widely between distributions in which of them source
which, under what circumstances, in what order and what additional configuration they perform.
As such, the most reliable way to get Pyenv in all environments is to append Pyenv
configuration commands to both `.bashrc` (for interactive shells)
and the profile file that Bash would use (for login shells).
1. First, add the commands to `~/.bashrc` by running the following in your terminal:
```bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init - bash)"' >> ~/.bashrc
```
2. Then, if you have `~/.profile`, `~/.bash_profile` or `~/.bash_login`, add the commands there as well.
If you have none of these, create a `~/.profile` and add the commands there.
* to add to `~/.profile`:
``` bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.profile
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.profile
echo 'eval "$(pyenv init - bash)"' >> ~/.profile
```
* to add to `~/.bash_profile`:
```bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(pyenv init - bash)"' >> ~/.bash_profile
```
**Bash warning**: There are some systems where the `BASH_ENV` variable is configured
to point to `.bashrc`. On such systems, you should almost certainly put the
`eval "$(pyenv init - bash)"` line into `.bash_profile`, and **not** into `.bashrc`. Otherwise, you
may observe strange behaviour, such as `pyenv` getting into an infinite loop.
See [#264](https://github.com/pyenv/pyenv/issues/264) for details.
</details>
#### Zsh
<details>
Add Pyenv startup commands to `~/.zshrc` by running the following in your terminal:
```zsh
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.zshrc
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc
echo 'eval "$(pyenv init - zsh)"' >> ~/.zshrc
```
If you wish to get Pyenv in noninteractive login shells as well, also add the commands to `~/.zprofile` or `~/.zlogin`.
</details>
#### Fish
<details>
1. If you have Fish 3.2.0 or newer, execute this interactively:
```fish
set -Ux PYENV_ROOT $HOME/.pyenv
test -d $PYENV_ROOT/bin; and fish_add_path $PYENV_ROOT/bin
```
2. Otherwise, execute the snippet below:
```fish
set -Ux PYENV_ROOT $HOME/.pyenv
test -d $PYENV_ROOT/bin; and set -U fish_user_paths $PYENV_ROOT/bin $fish_user_paths
```
3. Now, add this to `~/.config/fish/config.fish`:
```fish
pyenv init - fish | source
```
</details>
#### Nushell
<details>
Add the following lines to your `config.nu` to add Pyenv and its shims to your `PATH`.
Shell integration (completions and subcommands changing the shell's state)
isn't currently supported.
~~~ nu
$env.PYENV_ROOT = "~/.pyenv" | path expand
if (( $"($env.PYENV_ROOT)/bin" | path type ) == "dir") {
$env.PATH = $env.PATH | prepend $"($env.PYENV_ROOT)/bin" }
$env.PATH = $env.PATH | prepend $"(pyenv root)/shims"
~~~
</details>
#### Microsoft PowerShell
<details>
Add the commands to `$profile.CurrentUserAllHosts` by running the following in your terminal:
~~~ pwsh
echo '$Env:PYENV_ROOT="$Env:HOME/.pyenv"' >> $profile.CurrentUserAllHosts
echo 'if (Test-Path -LP "$Env:PYENV_ROOT/bin" -PathType Container) {
$Env:PATH="$Env:PYENV_ROOT/bin:$Env:PATH" }' >> $profile.CurrentUserAllHosts
echo 'iex ((pyenv init -) -join "`n")' >> $profile.CurrentUserAllHosts
~~~
</details>
### C. Restart your shell
----
@ -815,6 +711,127 @@ name | default | description
See also [_Special environment variables_ in Python-Build's README](plugins/python-build/README.md#special-environment-variables)
for environment variables that can be used to customize the build.
### Manual shell setup
Below is the suggested shell setup added to shell startup files by `pyenv init --install`.
* To automatically install Pyenv for a shell different than the running shell, run
```sh
path/to/pyenv --install <shell executable name>
```
e.g. `~/.pyenv --install bash`.
#### Bash
<details>
Stock Bash startup files vary widely between distributions in which of them source
which, under what circumstances, in what order and what additional configuration they perform.
As such, the most reliable way to get Pyenv in all environments is to append Pyenv
configuration commands to both `.bashrc` (for interactive shells)
and the profile file that Bash would use (for login shells).
1. First, add the commands to `~/.bashrc` by running the following in your terminal:
```bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init - bash)"' >> ~/.bashrc
```
2. Then, if you have `~/.profile`, `~/.bash_profile` or `~/.bash_login`, add the commands there as well.
If you have none of these, create a `~/.profile` and add the commands there.
* to add to `~/.profile`:
``` bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.profile
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.profile
echo 'eval "$(pyenv init - bash)"' >> ~/.profile
```
* to add to `~/.bash_profile`:
```bash
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(pyenv init - bash)"' >> ~/.bash_profile
```
**Bash warning**: There are some systems where the `BASH_ENV` variable is configured
to point to `.bashrc`. On such systems, you should almost certainly put the
`eval "$(pyenv init - bash)"` line into `.bash_profile`, and **not** into `.bashrc`. Otherwise, you
may observe strange behaviour, such as `pyenv` getting into an infinite loop.
See [#264](https://github.com/pyenv/pyenv/issues/264) for details.
</details>
#### Zsh
<details>
Add Pyenv startup commands to `~/.zshrc` by running the following in your terminal:
```zsh
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.zshrc
echo '[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc
echo 'eval "$(pyenv init - zsh)"' >> ~/.zshrc
```
If you wish to get Pyenv in noninteractive login shells as well, also add the commands to `~/.zprofile` or `~/.zlogin`.
</details>
#### Fish
<details>
1. If you have Fish 3.2.0 or newer, execute this interactively:
```fish
set -Ux PYENV_ROOT $HOME/.pyenv
test -d $PYENV_ROOT/bin; and fish_add_path $PYENV_ROOT/bin
```
2. Otherwise, execute the snippet below:
```fish
set -Ux PYENV_ROOT $HOME/.pyenv
test -d $PYENV_ROOT/bin; and set -U fish_user_paths $PYENV_ROOT/bin $fish_user_paths
```
3. Now, add this to `~/.config/fish/config.fish`:
```fish
pyenv init - fish | source
```
</details>
#### Nushell
<details>
Add the following lines to your `config.nu` to add Pyenv and its shims to your `PATH`.
Shell integration (completions and subcommands changing the shell's state)
isn't currently supported.
~~~ nu
$env.PYENV_ROOT = "~/.pyenv" | path expand
if (( $"($env.PYENV_ROOT)/bin" | path type ) == "dir") {
$env.PATH = $env.PATH | prepend $"($env.PYENV_ROOT)/bin" }
$env.PATH = $env.PATH | prepend $"(pyenv root)/shims"
~~~
</details>
#### Microsoft PowerShell
<details>
Add the commands to `$profile.CurrentUserAllHosts` by running the following in your terminal:
~~~ pwsh
echo '$Env:PYENV_ROOT="$Env:HOME/.pyenv"' >> $profile.CurrentUserAllHosts
echo 'if (Test-Path -LP "$Env:PYENV_ROOT/bin" -PathType Container) {
$Env:PATH="$Env:PYENV_ROOT/bin:$Env:PATH" }' >> $profile.CurrentUserAllHosts
echo 'iex ((pyenv init -) -join "`n")' >> $profile.CurrentUserAllHosts
~~~
</details>
----
## Development