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docs: make pipx the preferred (first mentioned) installation method
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radoering committed Sep 11, 2023
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Expand Up @@ -23,18 +23,85 @@ on Linux, macOS and Windows.

## Installation

{{% warning %}}
Poetry should always be installed in a dedicated virtual environment to isolate it from the rest of your system.
In no case, it should be installed in the environment of the project that is to be managed by Poetry.
This ensures that Poetry's own dependencies will not be accidentally upgraded or uninstalled.
(Each of the following installation methods ensures that Poetry is installed into an isolated environment.)
{{% /warning %}}

{{% note %}}
If you are viewing documentation for the development branch, you may wish to install a preview or development version of Poetry.
See the **advanced** installation instructions to use a preview or alternate version of Poetry.
{{% /note %}}

{{< tabs tabTotal="4" tabID1="installing-with-the-official-installer" tabID2="installing-with-pipx" tabID3="installing-manually" tabID4="ci-recommendations" tabName1="With the official installer" tabName2="With pipx" tabName3="Manually (advanced)" tabName4="CI recommendations">}}
{{< tabs tabTotal="4" tabID1="installing-with-pipx" tabID2="installing-with-the-official-installer" tabID3="installing-manually" tabID4="ci-recommendations" tabName1="With pipx" tabName2="With the official installer" tabName3="Manually (advanced)" tabName4="CI recommendations">}}

{{< tab tabID="installing-with-pipx" >}}

[`pipx`](https://github.com/pypa/pipx) is used to install Python CLI applications globally while still isolating them in virtual environments.
`pipx` will manage upgrades and uninstalls when used to install Poetry.

{{< steps >}}
{{< step >}}
**Install Poetry**

```bash
pipx install poetry
```
{{< /step >}}
{{< step >}}
**Install Poetry (advanced)**

`pipx` can install different versions of Poetry, using the same syntax as pip:

```bash
pipx install poetry==1.2.0
```

`pipx` can also install versions of Poetry in parallel, which allows for easy testing of alternate or prerelease
versions. Each version is given a unique, user-specified suffix, which will be used to create a unique binary name:

```bash
pipx install [email protected] poetry==1.2.0
[email protected] --version
```

```bash
pipx install --suffix=@preview --pip-args=--pre poetry
poetry@preview --version
```

Finally, `pipx` can install any valid [pip requirement spec](https://pip.pypa.io/en/stable/cli/pip_install/), which
allows for installations of the development version from `git`, or even for local testing of pull requests:

```bash
pipx install --suffix @master git+https://github.com/python-poetry/poetry.git@master
pipx install --suffix @pr1234 git+https://github.com/python-poetry/poetry.git@refs/pull/1234/head
```

{{< /step >}}
{{< step >}}
**Update Poetry**

```bash
pipx upgrade poetry
```
{{< /step >}}
{{< step >}}
**Uninstall Poetry**

```bash
pipx uninstall poetry
```
{{< /step >}}
{{< /steps >}}

{{< /tab >}}
{{< tab tabID="installing-with-the-official-installer" >}}

We provide a custom installer that will install Poetry in a new virtual environment to isolate it
from the rest of your system. This ensures that dependencies will not be accidentally upgraded or
uninstalled, and allows Poetry to manage its own environment.
We provide a custom installer that will install Poetry in a new virtual environment
and allows Poetry to manage its own environment.

{{< steps >}}
{{< step >}}
Expand Down Expand Up @@ -193,69 +260,6 @@ Also remove ~/.poetry/bin from your `$PATH` in your shell configuration, if it i
{{< /step >}}
{{< /steps >}}
{{< /tab >}}
{{< tab tabID="installing-with-pipx" >}}
Using [`pipx`](https://github.com/pypa/pipx) to install Poetry is also possible and fully supported.
`pipx` is used to install Python CLI applications globally while still isolating them in virtual environments.
`pipx` will manage upgrades and uninstalls when used to install Poetry.
{{< steps >}}
{{< step >}}
**Install Poetry**
```bash
pipx install poetry
```
{{< /step >}}
{{< step >}}
**Install Poetry (advanced)**
`pipx` can be install different versions of Poetry, using the same syntax as pip:
```bash
pipx install poetry==1.2.0
```
`pipx` can also install versions of Poetry in parallel, which allows for easy testing of alternate or prerelease
versions. Each version is given a unique, user-specified suffix, which will be used to create a unique binary name:
```bash
pipx install [email protected] poetry==1.2.0
[email protected] --version
```
```bash
pipx install --suffix=@preview --pip-args=--pre poetry
poetry@preview --version
```
Finally, `pipx` can install any valid [pip requirement spec](https://pip.pypa.io/en/stable/cli/pip_install/), which
allows for installations of the development version from `git`, or even for local testing of pull requests:
```bash
pipx install --suffix @master git+https://github.com/python-poetry/poetry.git@master
pipx install --suffix @pr1234 git+https://github.com/python-poetry/poetry.git@refs/pull/1234/head
```
{{< /step >}}
{{< step >}}
**Update Poetry**
```bash
pipx upgrade poetry
```
{{< /step >}}
{{< step >}}
**Uninstall Poetry**
```bash
pipx uninstall poetry
```
{{< /step >}}
{{< /steps >}}
{{< /tab >}}
{{< tab tabID="installing-manually" >}}
Expand All @@ -280,19 +284,34 @@ To uninstall Poetry, simply delete the entire `$VENV_PATH` directory.
Unlike development environments, where making use of the latest tools is desirable, in a CI environment reproducibility
should be made the priority. Here are some suggestions for installing Poetry in such an environment.
**Installation method**
**Version pinning**
Whatever method you use, it is highly recommended to explicitly control the version of Poetry used, so that you are able
to upgrade after performing your own validation. Each install method has a different syntax for setting the version that
is used in the following examples.
**Using pipx**
Just as `pipx` is a powerful tool for development use, it is equally useful in a CI environment
and should be one of your top choices for use of Poetry in CI.
```bash
pipx install poetry==1.2.0
```
**Using install.python-poetry.org**
{{% note %}}
The official installer script ([install.python-poetry.org](https://install.python-poetry.org)) offers a streamlined and
simplified installation of Poetry, sufficient for developer use or for simple pipelines. However, in a CI environment
the other two supported installation methods (pipx and manual) should be seriously considered.
**Using install.python-poetry.org**
{{% /note %}}
Downloading a copy of the installer script to a place accessible by your CI pipelines (or maintaining a copy of the
[repository](https://github.com/python-poetry/install.python-poetry.org)) is strongly suggested, to ensure your
pipeline's stability and to maintain control over what code is executed.

By default the installer will install to a user-specific directory. In more complex pipelines that may make accessing
By default, the installer will install to a user-specific directory. In more complex pipelines that may make accessing
Poetry difficult (especially in cases like multi-stage container builds). It is highly suggested to make use of
`$POETRY_HOME` when using the official installer in CI, as that way the exact paths can be controlled.

Expand All @@ -302,17 +321,6 @@ python3 install-poetry.py --version 1.2.0
$POETRY_HOME/bin/poetry --version
```

**Using pipx**

Just as `pipx` is a powerful tool for development use, it is equally useful in a CI environment. It takes the same steps
the installer does to safely install Poetry isolated from the rest of your system, but is generic and able to do this
for any Python package, with a syntax/usage that is similar to `pip`. `pipx` should be considered equally supported in
comparison to the official installer, and should be one of your top choices for use of Poetry in CI.

```bash
pipx install poetry==1.2.0
```

**Using pip (aka manually)**

For maximum control in your CI environment, installation with `pip` is fully supported and something you should
Expand All @@ -332,21 +340,6 @@ as the target environment managed by Poetry. If Poetry and your project are inst
is likely to upgrade or uninstall its own dependencies (causing hard-to-debug and understand errors).
{{% /note %}}

**Version pinning**

Whatever method you use, it is highly recommended to explicitly control the version of Poetry used, so that you are able
to upgrade after performing your own validation. Each install method has a different syntax for setting the version --
the following are some simple examples:

```bash
curl -sSL https://install.python-poetry.org | python3 - --version 1.2.0
# or
curl -sSL https://install.python-poetry.org | POETRY_VERSION=1.2.0 python3 -
pipx install poetry==1.2.0
/path/to/venv/bin/pip install poetry==1.2.0
```
{{< /tab >}}
{{< /tabs >}}

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