From 942851daa8aee941626f748f0bfdae64a8dce7d6 Mon Sep 17 00:00:00 2001
From: Mahdi Shafiei <m.mahdi.shafiei@gmail.com>
Date: Thu, 27 Aug 2026 15:03:27 -0700
Subject: [PATCH] Install CI environments from uv.lock

Ports artifex's uv sync block, and pins the interpreter for the sync step: uv sync selects
its own Python and does not inherit the one uv venv just created, so it resolved against
3.14 and refused the lock because tensorflow 2.20.0 has no cp314 wheel.
---
 .github/actions/setup-diffbio/action.yml | 27 +++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/.github/actions/setup-diffbio/action.yml b/.github/actions/setup-diffbio/action.yml
index 6cf799f..58cb7bf 100644
--- a/.github/actions/setup-diffbio/action.yml
+++ b/.github/actions/setup-diffbio/action.yml
@@ -43,6 +43,14 @@ runs:
       shell: bash
       env:
         UV_CONCURRENT_DOWNLOADS: "4"
+        # uv sync is a project command and selects its own interpreter; it does not
+        # inherit the one `uv venv --python` just created. Without these it resolved
+        # against CPython 3.14 and refused the lock, because tensorflow 2.20.0 has no
+        # cp314 wheel. The same three variables are exported for later steps further
+        # down; they are needed here too, before the first uv sync runs.
+        UV_PYTHON: ${{ inputs.python-version }}
+        UV_PYTHON_DOWNLOADS: never
+        UV_PYTHON_PREFERENCE: only-system
       run: |
         set -euo pipefail
 
@@ -51,18 +59,31 @@ runs:
           editable_target="${{ inputs.macos-editable-target }}"
         fi
 
+        # Resolve from uv.lock rather than from the pyproject floors. Installing
+        # unpinned let every tool drift to its newest release between runs, so a
+        # run could fail on a dependency change no commit had made.
+        sync_args=(--locked)
+        if [[ "$editable_target" == *"["* ]]; then
+          extras="${editable_target#*[}"
+          extras="${extras%]}"
+          IFS=',' read -ra extra_names <<< "$extras"
+          for extra in "${extra_names[@]}"; do
+            sync_args+=(--extra "${extra// /}")
+          done
+        fi
+
         for attempt in 1 2 3 4 5; do
-          if uv pip install -e "$editable_target"; then
+          if uv sync "${sync_args[@]}"; then
             break
           fi
 
           if [[ "$attempt" -eq 5 ]]; then
-            echo "Failed to install $editable_target after 5 attempts" >&2
+            echo "Failed to sync $editable_target after 5 attempts" >&2
             exit 1
           fi
 
           delay=$((attempt * 10))
-          echo "Install attempt $attempt failed, retrying in ${delay} seconds..." >&2
+          echo "Sync attempt $attempt failed, retrying in ${delay} seconds..." >&2
           sleep "$delay"
         done