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Upgrade pex to v2.97.0 #23482

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tobni merged 2 commits into from
Jul 3, 2026
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Upgrade pex to v2.97.0 #23482

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c25c7f7
feat: Upgrade pex to v2.97.0
tobni Jul 3, 2026
f269fa6
doc: Omit mention of --scie-only
tobni Jul 3, 2026
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5 changes: 3 additions & 2 deletions docs/notes/2.33.x.md
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Original file line number Diff line number Diff line change
Expand Up @@ -70,13 +70,14 @@ Fixed a bug where the Python Build Standalone provider used a host interpreter p

Fixed dependency validation for Python targets to honor resolve-derived interpreter constraints when `[python].default_to_resolve_interpreter_constraints` is enabled.

The default version of [Pex](https://github.com/pex-tool/pex) used by the Python backend has been upgraded to [`v2.96.1`](https://github.com/pex-tool/pex/releases/tag/v2.96.1). Of particular note for Pants users:
The default version of [Pex](https://github.com/pex-tool/pex) used by the Python backend has been upgraded to [`v2.97.0`](https://github.com/pex-tool/pex/releases/tag/v2.97.0). Of particular note for Pants users:

- Support for [Pip 26.1](https://pip.pypa.io/en/stable/news/#v26-1).
- In [some cases](https://github.com/pex-tool/pex/pull/3159) lockfile creation is significantly faster.
- Fixed `pex3 lock sync` failing to handle multiple input requirements for the same project name.
- The `scie_pbs_stripped` field of `pex_binary` targets can now be combined with `scie_pbs_free_threaded`.

Note that `v2.95.1` is now also the *minimum* required version of Pex. If you're pinning to an earlier version you must upgrade. Pex is very scrupulous about backwards compatibility, so this should not be a problem in general. If the pin was specifically to avoid a bug in Pex, that bug should be [reported](https://github.com/pex-tool/pex/issues/new), after first confirming that there isn't an existing [open issue](https://github.com/pex-tool/pex/issues) for it.
Note that `v2.97.0` is now also the *minimum* required version of Pex. If you're pinning to an earlier version you must upgrade. Pex is very scrupulous about backwards compatibility, so this should not be a problem in general. If the pin was specifically to avoid a bug in Pex, that bug should be [reported](https://github.com/pex-tool/pex/issues/new), after first confirming that there isn't an existing [open issue](https://github.com/pex-tool/pex/issues) for it.

The `pex_binary` target now has a `validate_entry_point` which plumbs through the [`--validate-entry-point`](https://github.com/pex-tool/pex/releases/tag/v1.4.5) flag to Pex. This validates the entry point by importing it in a separate process at build time.

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8 changes: 4 additions & 4 deletions src/python/pants/backend/python/util_rules/pex_cli.py
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Expand Up @@ -41,9 +41,9 @@
logger = logging.getLogger(__name__)


_PEX_VERSION = "v2.96.1"
_PEX_BINARY_HASH = "fcb10c5c0f560bb6c5e072f88dcee5123690d5b2aef4e76d75caed733101378b"
_PEX_BINARY_SIZE = 5040040
_PEX_VERSION = "v2.97.0"
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tobni marked this conversation as resolved.
_PEX_BINARY_HASH = "cedb222723b5dd68d96997168943c0c932a904e360515c0edd9f85e4bb674cc9"
_PEX_BINARY_SIZE = 5040201


class PexCli(TemplatedExternalTool):
Expand All @@ -53,7 +53,7 @@ class PexCli(TemplatedExternalTool):

default_version = _PEX_VERSION
default_url_template = "https://github.com/pex-tool/pex/releases/download/{version}/pex"
version_constraints = ">=2.95.1,<3.0"
version_constraints = ">=2.97.0,<3.0"

# extra args to be passed to the pex tool; note that they
# are going to apply to all invocations of the pex tool.
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