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refactor: once again rework get-poetry.py
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The new plan is described in #6377.

With these changes, we see the following behaviors:

```sh
$ python get-poetry.py

Retrieving Poetry metadata

This installer is deprecated, and scheduled for removal from the Poetry repository on or after January 1, 2023.
See #6377 for details.

You should migrate to https://install.python-poetry.org instead, which supports all versions of Poetry, and allows for `self update` of versions 1.1.7 or newer.
Instructions are available at https://python-poetry.org/docs/#installation.

Without an explicit version, this installer will attempt to install the latest version of Poetry.
This installer cannot install Poetry 1.2.0a1 or newer (and installs will be unable to `self update` to 1.2.0a1 or newer).

To continue to use this deprecated installer, you must specify an explicit version with --version <version> or POETRY_VERSION=<version>.
Alternatively, if you wish to force this deprecated installer to use the latest installable release, set GET_POETRY_IGNORE_DEPRECATION=1.

Version 1.2.0 is not supported by this installer! Please specify a version prior to 1.2.0a1 to continue!
```
```sh
$ python get-poetry.py --version 1.2.0

Retrieving Poetry metadata

This installer is deprecated, and scheduled for removal from the Poetry repository on or after January 1, 2023.
See #6377 for details.

You should migrate to https://install.python-poetry.org instead, which supports all versions of Poetry, and allows for `self update` of versions 1.1.7 or newer.
Instructions are available at https://python-poetry.org/docs/#installation.

Without an explicit version, this installer will attempt to install the latest version of Poetry.
This installer cannot install Poetry 1.2.0a1 or newer (and installs will be unable to `self update` to 1.2.0a1 or newer).

To continue to use this deprecated installer, you must specify an explicit version with --version <version> or POETRY_VERSION=<version>.
Alternatively, if you wish to force this deprecated installer to use the latest installable release, set GET_POETRY_IGNORE_DEPRECATION=1.

Version 1.2.0 is not supported by this installer! Please specify a version prior to 1.2.0a1 to continue!
```
```sh
$ python get-poetry.py --version 1.1.15

Retrieving Poetry metadata

This installer is deprecated, and scheduled for removal from the Poetry repository on or after January 1, 2023.
See #6377 for details.

You should migrate to https://install.python-poetry.org instead, which supports all versions of Poetry, and allows for `self update` of versions 1.1.7 or newer.
Instructions are available at https://python-poetry.org/docs/#installation.

[install of 1.1.15]
```
```sh
$ GET_POETRY_IGNORE_DEPRECATION=1 python get-poetry.py

Retrieving Poetry metadata

This installer is deprecated, and scheduled for removal from the Poetry repository on or after January 1, 2023.
See #6377 for details.

You should migrate to https://install.python-poetry.org instead, which supports all versions of Poetry, and allows for `self update` of versions 1.1.7 or newer.
Instructions are available at https://python-poetry.org/docs/#installation.

Version 1.2.0 is available but is not supported by this installer!
Version 1.1.15 will be installed as it is the latest version supported by this installer.

This is not the latest version of Poetry! If you wish to install the latest version, you must move to the new installer as described above!

[install of 1.1.15]
```
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@neersighted
neersighted committed Sep 3, 2022
1 parent b34cf21 commit 58d2b99
Showing 1 changed file with 45 additions and 62 deletions.
107 changes: 45 additions & 62 deletions get-poetry.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,6 @@
import json
import os
import platform
import random
import re
import shutil
import stat
Expand Down Expand Up @@ -70,8 +69,6 @@
WINDOWS = sys.platform.startswith("win") or (sys.platform == "cli" and os.name == "nt")


BROWNOUT_CHANCE = 5 # percent chance to randomly fail in CI

FOREGROUND_COLORS = {
"black": 30,
"red": 31,
Expand Down Expand Up @@ -355,7 +352,7 @@ def run(self):
version, current_version = self.get_version()

if version is None:
return 0
return 1

self.customize_install()
self.display_pre_message()
Expand Down Expand Up @@ -449,49 +446,30 @@ def _is_supported(x):
print(
colorize(
"deprecation",
"This installer is deprecated, and cannot install Poetry 1.2.0a1 or"
" newer.\nAdditionally, Poetry installations created by this installer"
" cannot `self update` to 1.2.0a1 or later.\nYou should migrate to"
" https://install.python-poetry.org instead. Instructions are available"
" at https://python-poetry.org/docs/#installation.\n",
"This installer is deprecated, and scheduled for removal from the"
" Poetry repository on or after January 1, 2023.\nSee"
" https://github.com/python-poetry/poetry/issues/6377 for"
" details.\n\nYou should migrate to https://install.python-poetry.org"
" instead, which supports all versions of Poetry, and allows for `self"
" update` of versions 1.1.7 or newer.\nInstructions are available at"
" https://python-poetry.org/docs/#installation.\n",
)
)

if not os.environ.get("GET_POETRY_IGNORE_DEPRECATION"):
if os.environ.get("CI"):
print(
colorize(
"deprecation",
"A CI environment has been detected! Due to the above"
" deprecation, this installer is subject to an escalating"
" brownout percentage (currently {percent}%)!\nIf you"
" understand the above warning and wish to opt out of this"
" brownout, set GET_POETRY_IGNORE_DEPRECATION=1 in the"
" environment.\n".format(percent=BROWNOUT_CHANCE),
)
)
if random.randrange(1, 100) < BROWNOUT_CHANCE:
print(
colorize(
"error",
"This invocation of the installer has been terminated due"
" to the brownout described above. Please carefully read"
" the above notices and update your CI pipeline"
" accordingly!",
)
)
return None, None
else:
print(
colorize(
"error",
"This installer will now exit. If you understand the above"
" warning and wish to proceed anyway, set"
" GET_POETRY_IGNORE_DEPRECATION=1 in the environment and run"
" this installer again.",
)
if not os.environ.get("GET_POETRY_IGNORE_DEPRECATION") and not self._version:
print(
colorize(
"deprecation",
"Without an explicit version, this installer will attempt to"
" install the latest version of Poetry.\nThis installer cannot"
" install Poetry 1.2.0a1 or newer (and installs will be unable to"
" `self update` to 1.2.0a1 or newer).\n\nTo continue to use this"
" deprecated installer, you must specify an explicit version with"
" --version <version> or POETRY_VERSION=<version>.\nAlternatively,"
" if you wish to force this deprecated installer to use the latest"
" installable release, set GET_POETRY_IGNORE_DEPRECATION=1.\n",
)
return None, None
)

version = self._version
if not version:
Expand All @@ -500,29 +478,33 @@ def _is_supported(x):
if m.group(5) and not self.allows_prereleases():
continue

if _is_supported(release):
if not os.environ.get("GET_POETRY_IGNORE_DEPRECATION"):
version = release

print(
colorize(
"warning",
"Version {version} will be installed as it is the latest"
" version supported by this installer.\nThis is not the"
" latest version of Poetry! If you wish to install the"
" latest version, please migrate to the new installer as"
" described above!\n".format(version=release),
)
)

break
else:
print(
colorize(
"warning",
"Version {version} is available but is not supported by"
" this installer!".format(version=release),
if _is_supported(release):
print(
colorize(
"warning",
"Version {release} will be installed as it is the"
" latest version supported by this installer.\n\nThis"
" is not the latest version of Poetry! If you wish to"
" install the latest version, you must move to the new"
" installer as described above!\n".format(
release=release
),
)
)
version = release
break
else:
print(
colorize(
"warning",
"Version {release} is available but is not supported by"
" this installer!".format(release=release),
)
)
)

if not _is_supported(version):
print(
Expand All @@ -534,6 +516,7 @@ def _is_supported(x):
),
)
)

return None, None

current_version = None
Expand Down

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