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fix(install): let uv pick the Python via --python-preference system

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Both installers detected a system Python with a floor-only check and forced it
with `uv tool install --python <interp>`. On a host whose only Python is outside
litellm's requires-python (a too-old 3.9 or, increasingly, a too-new 3.14) that
forced an incompatible interpreter and the resolve failed. Drop the detection and
pass `--python-preference system`: uv reuses a compatible system Python when
present and downloads a managed one otherwise, always honouring requires-python
This commit is contained in:
mateo-berri 2026-06-08 19:13:51 -07:00
parent d3d7dc803e
commit bbcb54092e
2 changed files with 13 additions and 31 deletions
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8
scripts/install-cli.sh
View file

@ -86,14 +86,14 @@ if [ -z "$UV_BIN" ] || [ "${CURRENT_UV_VERSION:-}" != "$UV_VERSION" ]; then
fi
# ── install ────────────────────────────────────────────────────────────────
# No --python: uv selects an interpreter that satisfies litellm's requires-python
# and downloads a managed one when the host has none, so a too-old (3.9) or
# too-new (3.14+) system Python is skipped instead of causing a resolve failure.
# --python-preference system: reuse a compatible system Python when present,
# otherwise download a managed one. Either way uv honours litellm's requires-python,
# so a too-old (3.9) or too-new (3.14+) system Python is skipped, not forced.
echo ""
header "Installing litellm[cli]…"
echo ""
"$UV_BIN" tool install --force "${LITELLM_PACKAGE}" \
"$UV_BIN" tool install --python-preference system --force "${LITELLM_PACKAGE}" \
|| die "uv tool install failed. Try manually: $UV_BIN tool install '${LITELLM_PACKAGE}'"
# ── find the lite binary installed by uv tool ──────────────────────────────

36
scripts/install.sh
View file

@ -2,14 +2,13 @@
# LiteLLM Installer
# Usage: curl -fsSL https://raw.githubusercontent.com/BerriAI/litellm/main/scripts/install.sh | sh
#
# Needs only curl: uv is bootstrapped if missing, and uv provisions a compatible
# Python itself (reusing a suitable system one, else downloading a managed build).
#
# NOTE: set -e without pipefail for POSIX sh compatibility (dash on Ubuntu/Debian
# ignores the shebang when invoked as `sh` and does not support `pipefail`).
set -eu
MIN_PYTHON_MAJOR=3
MIN_PYTHON_MINOR=10
MANAGED_PYTHON_VERSION=3.13
# NOTE: before merging, this must stay as "litellm[proxy]" to install from PyPI.
LITELLM_PACKAGE="litellm[proxy]"
UV_VERSION="0.10.9"
@ -53,24 +52,6 @@ esac
info "Platform: $PLATFORM"
# ── Python detection ───────────────────────────────────────────────────────
PYTHON_BIN=""
for candidate in python3 python; do
if command -v "$candidate" >/dev/null 2>&1; then
major="$("$candidate" -c 'import sys; print(sys.version_info.major)' 2>/dev/null || true)"
minor="$("$candidate" -c 'import sys; print(sys.version_info.minor)' 2>/dev/null || true)"
if [ "${major:-0}" -ge "$MIN_PYTHON_MAJOR" ] && [ "${minor:-0}" -ge "$MIN_PYTHON_MINOR" ]; then
PYTHON_BIN="$(command -v "$candidate")"
info "Python: $("$candidate" --version 2>&1)"
break
fi
fi
done
if [ -z "$PYTHON_BIN" ]; then
info "No Python ${MIN_PYTHON_MAJOR}.${MIN_PYTHON_MINOR}+ found; uv will install a managed Python ${MANAGED_PYTHON_VERSION}"
fi
# ── uv detection / install ────────────────────────────────────────────────
UV_BIN=""
CURRENT_UV_VERSION=""
@ -103,17 +84,18 @@ echo ""
header "Installing litellm[proxy]…"
echo ""
INSTALL_PYTHON="${PYTHON_BIN:-$MANAGED_PYTHON_VERSION}"
"$UV_BIN" tool install --python "$INSTALL_PYTHON" --force "${LITELLM_PACKAGE}" \
|| die "uv tool install failed. Try manually: $UV_BIN tool install --python '$INSTALL_PYTHON' '${LITELLM_PACKAGE}'"
# --python-preference system: reuse a compatible system Python when present,
# otherwise download a managed one. Either way uv honours litellm's requires-python,
# so a too-old (3.9) or too-new (3.14+) system Python is skipped, not forced.
"$UV_BIN" tool install --python-preference system --force "${LITELLM_PACKAGE}" \
|| die "uv tool install failed. Try manually: $UV_BIN tool install '${LITELLM_PACKAGE}'"
# ── find the litellm binary installed by uv tool ───────────────────────────
SCRIPTS_DIR="$("$UV_BIN" tool dir --bin)"
LITELLM_BIN="${SCRIPTS_DIR}/litellm"
if [ ! -x "$LITELLM_BIN" ]; then
die "litellm binary not found after install. Try: $UV_BIN tool install --python '$PYTHON_BIN' '${LITELLM_PACKAGE}'"
die "litellm binary not found after install. Try: $UV_BIN tool install '${LITELLM_PACKAGE}'"
fi
# ── success banner ─────────────────────────────────────────────────────────