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# Backwards-incompatible changes in EasyBuild v5.0 | ||
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*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
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A number of *backwards-incompatible* changes are being made in EasyBuild v5.0: | ||
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||
* [Support for Python 2.7 is removed, Python 3.6+ is required][py36] | ||
* [Deprecated EasyBuild bootstrap script is removed][bootstrap_script] | ||
* [Experimental support for the `.yeb` easyconfig format is removed][yeb] | ||
|
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--- | ||
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## Support for Python 2.7 is removed, Python 3.6+ is required {: #py36 } | ||
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EasyBuild 5.0 requires Python >= 3.6 to run. | ||
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Running EasyBuild with Python 2.7 or a Python 3 version older than Python 3.6 is no longer supported. | ||
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||
Trying to run EasyBuild with a Python version that is too old will result in an error: | ||
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||
```log | ||
ERROR: No compatible 'python' command found via $PATH (EasyBuild requires Python 3.6+) | ||
``` | ||
|
||
Python 2.7 has been [end-of-life since 1 Jan 2020](https://www.python.org/doc/sunset-python-2), | ||
and dropping compatibility with Python 2.7 and Python 3.5 enabled some significant code cleanup | ||
(see [easybuild-framework PR #4229](https://github.com/easybuilders/easybuild-framework/pull/4229)). | ||
|
||
The [results of the 6th EasyBuild User Survey (2022)](https://easybuild.io/user_survey) show that the impact of | ||
this breaking change on the EasyBuild community should be very limited, since: | ||
|
||
* Only ~13% of survey participants were still running EasyBuild on top of Python 2.7; | ||
* No survey participants reported using Python 3.5; | ||
* Over 85% of survey participants reported using Python 3.6, or a more recent version of Python 3; | ||
* Only 3 out of 118 survey participants (~2.5%) reported that dropping support for running EasyBuild | ||
on top of Python 2 would be *problematic* for them; | ||
|
||
Along with actively removing code that was only required to retain compatibility with Python 2.7 or 3.5, | ||
the `easybuild.tools.py2vs3` module that was introduced to facilitate supporting both Python 2.7 and Python 3 | ||
has been deprecated (see also [here](deprecated-functionality.md#py2vs3)). | ||
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--- | ||
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## Deprecated EasyBuild bootstrap script is removed {: #bootstrap_script } | ||
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The EasyBuild bootstrap script has been removed (see [easybuild-framework PR #4233](https://github.com/easybuilders/easybuild-framework/pull/4233)). | ||
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Please see the [installation page](../installation.md) for the suggested methods for installing EasyBuild. | ||
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--- | ||
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## Experimental support for the .yeb easyconfig format is removed {: #yeb } | ||
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Support for the experimental `.yeb` easyconfig format has been removed (see [easybuild-framework PR #4237](https://github.com/easybuilders/easybuild-framework/pull/4237)). | ||
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This format allowed easyconfigs to be specified in YAML. However, there has been no recent development of this | ||
format and little suggestion that anyone was using it at all. |
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# Deprecated functionality in EasyBuild v5.0 | ||
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*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
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Some functionality is being deprecated in EasyBuild v5.0, and will no longer be supported in EasyBuild v6.0: | ||
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* [`run_cmd` and `run_cmd_qa` functions][run_cmd] | ||
* [`easybuild.tools.py2vs3` module][py2vs3] | ||
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If you trigger any deprecated functionality when using EasyBuild v5.0, a warning message will be printed. | ||
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--- | ||
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## `run_cmd` and `run_cmd_qa` functions {: #run_cmd } | ||
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The `run_cmd` and `run_cmd_qa` functions will be deprecated. | ||
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You should migrate to the new [`run_shell_cmd`](run_shell_cmd.md) function instead. | ||
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--- | ||
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## `easybuild.tools.py2vs3` module {: #py2vs3 } | ||
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[easybuild-framework PR #4229](https://github.com/easybuilders/easybuild-framework/pull/4229) | ||
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The following table lists the changes required to replace imports from the the `py2vs3` module. | ||
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| `from easybuild.tools.py2vs3 import ...` | Replacement | | ||
|--|--| | ||
| `ascii_letters` | `from string import ascii_letters` | | ||
| `ascii_lowercase` | `from string import ascii_lowercase` | | ||
| `build_opener` | `from urllib.request import build_opener` | | ||
| `ConfigParser` | `from configparser import ConfigParser` | | ||
| `configparser` | `import configparser` | | ||
| `create_base_metaclass` | `from easybuild.base.wrapper import create_base_metaclass` | | ||
| `extract_method_name` | No import required. Replace `extract_method_name(method)` with `'_'.join(method.__code__.co_names)` | | ||
| `HTMLParser` | `from html.parser import HTMLParser` | | ||
| `HTTPError` | `from urllib.request import HTTPError` | | ||
| `HTTPSHandler` | `from urllib.request import HTTPSHandler` | | ||
| `json_loads` | `from json import loads` and rename `json_loads` to `loads` | | ||
| `Mapping` | `from collections.abc import Mapping` | | ||
| `mk_wrapper_baseclass` | `from easybuild.base.wrapper import mk_wrapper_baseclass` | | ||
| `OrderedDict` | `from collections import OrderedDict` | | ||
| `raise_with_traceback` | No import required. Replace `raise_with_traceback(exception, message, tb)` with `raise exception(message).with_traceback(tb)` | | ||
| `reload` | `from importlib import reload` | | ||
| `Request` | `from urllib.request import Request` | | ||
| `string_type` | No import required. Use `str` directly. | | ||
| `StringIO` | `from io import StringIO` | | ||
| `std_urllib` | `import urllib.request as std_urllib` | | ||
| `subprocess_popen_text` | `from easybuild.tools.run import subprocess_popen_text` | | ||
| `subprocess_terminate` | `from easybuild.tools.run import subprocess_terminate` | | ||
| `urlencode` | `from urllib.parse import urlencode` | | ||
| `URLError` | `from urllib.request import URLError` | | ||
| `urlopen` | `from urllib.request import urlopen` | | ||
|
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# Enhancements in EasyBuild v5.0 | ||
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*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
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Various significant enhancements are included in EasyBuild v5.0, including: | ||
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* [`run_shell_cmd` function][run_shell_cmd] | ||
* [Enable `--trace` by default][trace] | ||
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--- | ||
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## `run_shell_cmd` function { : #run_shell_cmd } | ||
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See dedicated page on the new [`run_shell_cmd` function](run_shell_cmd.md). | ||
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--- | ||
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## Enable `--trace` by default {: #trace } | ||
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The [`--trace` option](../tracing-progress.md) is enabled by default (see [easybuild-framework PR #4250](https://github.com/easybuilders/easybuild-framework/pull/4250)). | ||
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This makes the output produced by the `eb` command more informative, by providing more information about what's going on in the background. | ||
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To disable trace output, either: | ||
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* Use the `--disable-trace` command line option; | ||
* Set the `$EASYBUILD_DISABLE_TRACE` environment variable; | ||
* Disable trace mode in a [configuration file](../configuration.md#configuration_file): | ||
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``` ini | ||
[override] | ||
trace=0 | ||
``` |
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# EasyBuild v5.0 | ||
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* [Overview of changes](overview-of-changes.md) | ||
* [GitHub Project board](https://github.com/orgs/easybuilders/projects/18) | ||
* [Talk on EasyBuild 5.0 at EUM'23](https://easybuild.io/eum23/#easybuild5) | ||
- [Overview of changes](overview-of-changes.md) | ||
- [Backwards-incompatible changes](backwards-incompatible-changes.md) | ||
- [Enhancements](enhancements.md) | ||
- [`run_shell_cmd` function](run_shell_cmd.md) | ||
- [Deprecated functionality](deprecated-functionality.md) | ||
- [Policies](policies.md) | ||
- [GitHub Project board](https://github.com/orgs/easybuilders/projects/18) | ||
- [Talk on EasyBuild 5.0 at EasyBuild User Meeting 2023](https://easybuild.io/eum23/#easybuild5) |
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# Overview of changes in EasyBuild version 5.0 {: #overview } | ||
# Overview of changes in EasyBuild version 5.0 | ||
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!!! warning | ||
EasyBuild 5.0 is currently still under development, via the `5.0.x` branches in the EasyBuild GitHub repositories. | ||
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We intend to update this page regularly as the [planned changes][eb5_plans] are being implemented and when there | ||
are [proposed changes][eb5_proposals] where we are requesting community feedback. | ||
We intend to update this section of the documentation regularly as the planned changes are being implemented, | ||
and when there are [proposed changes](proposed-changes.md) where we are requesting community feedback. | ||
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This page provides a concise overview of the most prominent changes in EasyBuild version 5.0, | ||
which can be categorized as: | ||
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* [Significant enhancements][significant_enhancements] | ||
* [Backward-incompatible changes][backwards_incompatible] | ||
* [Deprecated functionality][deprecated_v5] | ||
* [Enhancements](enhancements.md) | ||
* [Backward-incompatible changes](backwards-incompatible-changes.md) | ||
* [Deprecated functionality](deprecated-functionality.md) | ||
* [Proposed changes](proposed-changes.md) | ||
* [Policies](policies.md) | ||
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For in-depth details on a particular change, see the pull requests that are linked from each of the subsections below. | ||
For in-depth details on a particular change, see the pull requests that are linked | ||
from each of the subsections linked above. | ||
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--- | ||
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## Planned and proposed changes for EasyBuild v5.0 {: #eb5_changes } | ||
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At the [EasyBuild User Meeting](https://easybuild.io/eum23), Simon Branford set out the | ||
At the [EasyBuild User Meeting 2023](https://easybuild.io/eum23), Simon Branford set out the | ||
[roadmap for EasyBuild v5.0](https://easybuild.io/eum23/#easybuild5). | ||
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### Proposed changes for EasyBuild v5.0 {: #eb5_proposals } | ||
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There are several proposed changes where the EasyBuild maintainers are seeking community feedback. If you wish to provide | ||
feedback then please comment in the GitHub issue for the proposal. | ||
|
||
* [Minimum supported Lmod Version](https://github.com/easybuilders/easybuild/issues/871) | ||
* [Toolchain Support Policy](https://github.com/easybuilders/easybuild/issues/872) | ||
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### Planned changes for EasyBuild v5.0 {: #eb5_plans } | ||
To track the progress on the development of EasyBuild v5.0, | ||
see the [GitHub Project board for EasyBuild v5.0](https://github.com/orgs/easybuilders/projects/18). | ||
|
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!!! note | ||
This list is the major planned changes. It is not intended to be a complete list of all changes that are | ||
planned for EasyBuild v5.0. | ||
|
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### Tracking development of EasyBuild v5.0 | ||
|
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* [GitHub Project board for EasyBuild v5.0](https://github.com/orgs/easybuilders/projects/18) | ||
|
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--- | ||
|
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## Significant enhancements in EasyBuild v5.0 {: #significant_enhancements } | ||
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Various significant enhancements are included in EasyBuild v5.0, including: | ||
|
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* [enable `--trace` by default][eb5_trace] | ||
|
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### `--trace` enabled by default {: #eb5_trace } | ||
|
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The [`--trace` option][trace] is enabled by default (see [easybuild-framework PR #4250](https://github.com/easybuilders/easybuild-framework/pull/4250)). | ||
This makes the output produced by the `eb` command more informative, by providing more information about what's going on in the background. | ||
|
||
To disable trace output, either: | ||
|
||
* Use the `--disable-trace` command line option; | ||
* Set the `$EASYBUILD_DISABLE_TRACE` environment variable; | ||
* Disable trace mode in a [configuration file][configuration_file]: | ||
|
||
``` ini | ||
[override] | ||
trace=0 | ||
``` | ||
|
||
--- | ||
|
||
## Backwards-incompatible changes in EasyBuild v4.0 {: #backwards_incompatible } | ||
|
||
A number of *backwards-incompatible* changes are being made in EasyBuild v5.0: | ||
|
||
* [Support for Python 2.7 is removed -- Python 3.6+ is required][py36] | ||
* [Deprecated EasyBuild bootstrap script is removed][bootstrap_script] | ||
* [Experimental support for the .yeb easyconfig format is removed][yeb] | ||
|
||
--- | ||
|
||
### Support for Python 2.7 is removed -- Python 3.6+ is required {: #py36 } | ||
|
||
EasyBuild 5.0 requires Python >= 3.6 to run. | ||
|
||
Running EasyBuild with Python 2.7 or a Python 3 version older than Python 3.6 is no longer supported. | ||
|
||
Trying to run EasyBuild with a Python version that is too old will result in an error: | ||
|
||
```log | ||
ERROR: No compatible 'python' command found via $PATH (EasyBuild requires Python 3.6+) | ||
``` | ||
|
||
Python 2.7 has been [end-of-life since 1 Jan 2020](https://www.python.org/doc/sunset-python-2), | ||
and dropping compatibility with Python 2.7 and Python 3.5 enabled some significant code cleanup | ||
(see [easybuild-framework PR #4229](https://github.com/easybuilders/easybuild-framework/pull/4229)). | ||
|
||
The [results of the 6th EasyBuild User Survey (2022)](https://easybuild.io/user_survey) show that the impact of | ||
this breaking change on the EasyBuild community should be very limited, since: | ||
|
||
* Only ~13% of survey participants were still running EasyBuild on top of Python 2.7; | ||
* No survey participants reported using Python 3.5; | ||
* Over 85% of survey participants reported using Python 3.6, or a more recent version of Python 3; | ||
* Only 3 out of 118 survey participants (~2.5%) reported that dropping support for running EasyBuild | ||
on top of Python 2 would be *problematic* for them; | ||
|
||
Along with actively removing code that was only required to retain compatibility with Python 2.7 or 3.5, | ||
the `easybuild.tools.py2vs3` module that was introduced to facilitate supporting both Python 2.7 and Python 3 | ||
has been deprecated ([see also below][py2vs3]). | ||
|
||
--- | ||
|
||
### Deprecated EasyBuild bootstrap script is removed {: #bootstrap_script } | ||
|
||
The EasyBuild bootstrap script has been removed (see [easybuild-framework PR #4233](https://github.com/easybuilders/easybuild-framework/pull/4233)). | ||
Please see the [installation page][installation] for the suggested methods for installing EasyBuild. | ||
|
||
--- | ||
|
||
### Experimental support for the .yeb easyconfig format is removed {: #yeb } | ||
|
||
Support for the experimental `.yeb` easyconfig format has been removed (see [easybuild-framework PR #4237](https://github.com/easybuilders/easybuild-framework/pull/4237)). | ||
This format allowed easyconfigs to be specified in YAML. However, there has been no recent development of this | ||
format and little suggestion that anyone was using it. | ||
|
||
--- | ||
|
||
## Deprecated functionality in EasyBuild v5.0 {: #deprecated_v5 } | ||
|
||
Some functionality is being deprecated in EasyBuild v5.0, and will no longer be supported in EasyBuild v6.0: | ||
|
||
* [`easybuild.tools.py2vs3` module][py2vs3] | ||
|
||
If you trigger any deprecated functionality, a warning message will be printed. | ||
|
||
--- | ||
|
||
### `easybuild.tools.py2vs3` module {: #py2vs3 } | ||
|
||
[easybuild-framework PR #4229](https://github.com/easybuilders/easybuild-framework/pull/4229) | ||
|
||
The following table lists the changes required to replace imports from the the `py2vs3` module. | ||
|
||
| `from easybuild.tools.py2vs3 import ...` | Replacement | | ||
|--|--| | ||
| `ascii_letters` | `from string import ascii_letters` | | ||
| `ascii_lowercase` | `from string import ascii_lowercase` | | ||
| `build_opener` | `from urllib.request import build_opener` | | ||
| `ConfigParser` | `from configparser import ConfigParser` | | ||
| `configparser` | `import configparser` | | ||
| `create_base_metaclass` | `from easybuild.base.wrapper import create_base_metaclass` | | ||
| `extract_method_name` | No import required. Replace `extract_method_name(method)` with `'_'.join(method.__code__.co_names)` | | ||
| `HTMLParser` | `from html.parser import HTMLParser` | | ||
| `HTTPError` | `from urllib.request import HTTPError` | | ||
| `HTTPSHandler` | `from urllib.request import HTTPSHandler` | | ||
| `json_loads` | `from json import loads` and rename `json_loads` to `loads` | | ||
| `Mapping` | `from collections.abc import Mapping` | | ||
| `mk_wrapper_baseclass` | `from easybuild.base.wrapper import mk_wrapper_baseclass` | | ||
| `OrderedDict` | `from collections import OrderedDict` | | ||
| `raise_with_traceback` | No import required. Replace `raise_with_traceback(exception, message, tb)` with `raise exception(message).with_traceback(tb)` | | ||
| `reload` | `from importlib import reload` | | ||
| `Request` | `from urllib.request import Request` | | ||
| `string_type` | No import required. Use `str` directly. | | ||
| `StringIO` | `from io import StringIO` | | ||
| `std_urllib` | `import urllib.request as std_urllib` | | ||
| `subprocess_popen_text` | `from easybuild.tools.run import subprocess_popen_text` | | ||
| `subprocess_terminate` | `from easybuild.tools.run import subprocess_terminate` | | ||
| `urlencode` | `from urllib.parse import urlencode` | | ||
| `URLError` | `from urllib.request import URLError` | | ||
| `urlopen` | `from urllib.request import urlopen` | | ||
This section covers the major planned changes. | ||
|
||
It is not intended to be a *complete* list of all changes that are planned for EasyBuild v5.0. |
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# Policies related to EasyBuild v5.0 | ||
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*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
|
||
Starting with EasyBuild v5.0, we will enforce the new [toolchain support policy](../policies/toolchains.md). |
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# Proposed changes for EasyBuild v5.0 | ||
|
||
*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
|
||
There are several proposed changes where the EasyBuild maintainers are seeking community feedback. | ||
If you wish to provide feedback then please comment in the GitHub issue for the proposal. | ||
|
||
* [Minimum supported Lmod version](https://github.com/easybuilders/easybuild/issues/871) | ||
* [Toolchain support policy](https://github.com/easybuilders/easybuild/issues/872) |
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# `run_shell_cmd` function | ||
|
||
*(for a full overview of changes in EasyBuild v5.0, see [here](overview-of-changes.md))* | ||
|
||
In EasyBuild v5.0, a new function named `run_shell_cmd` is introduced to run shell commands. | ||
|
||
This function replaces both the `run_cmd` and `run_cmd_qa` functions, which will be deprecated in EasyBuild v5.0. | ||
|
||
## Motivation | ||
|
||
... | ||
|
||
## High-level overview | ||
|
||
... | ||
|
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## Use cases | ||
|
||
... | ||
|
||
## Transitioning from `run_cmd` to `run_shell_cmd` | ||
|
||
... | ||
|
||
## Transitioning from `run_cmd_qa` to `run_shell_cmd` | ||
|
||
... |
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