fix(ci): route all pip installs through mirror

Jenkinsfile

@@ -30,6 +30,8 @@ pipeline {
         DOCKER_CONFIG = "${WORKSPACE}/.ci/docker"
         NPM_CONFIG_CACHE = "${WORKSPACE}/.ci/npm-cache"
         PIP_CACHE_DIR = "${WORKSPACE}/.ci/pip-cache"
+        PIP_INDEX_URL = 'https://pypi.tuna.tsinghua.edu.cn/simple'
+        PIP_DEFAULT_TIMEOUT = '60'
         IMAGEFIND_WHEEL_CACHE = "${WORKSPACE}/.ci/wheelhouse-python312"
         IMAGEFIND_DEPENDENCY_TMPDIR = "${WORKSPACE}/.ci/dependency-tmp"
         IMAGEFIND_VERIFY_TMPDIR = "${WORKSPACE}/.ci/fnos-verify"

tests/test_fnos_dependency_script.py

@@ -6,3 +6,9 @@ def test_fnos_dependency_download_uses_fast_configurable_index() -> None:
     assert "PIP_INDEX_URL=${PIP_INDEX_URL:-https://pypi.tuna.tsinghua.edu.cn/simple}" in script
     assert '--index-url "$PIP_INDEX_URL"' in script
     assert '--timeout "$PIP_TIMEOUT" --retries 4' in script
+
+
+def test_jenkins_uses_fast_index_for_every_pip_stage() -> None:
+    pipeline = (Path(__file__).parents[1] / "Jenkinsfile").read_text()
+    assert "PIP_INDEX_URL = 'https://pypi.tuna.tsinghua.edu.cn/simple'" in pipeline
+    assert "PIP_DEFAULT_TIMEOUT = '60'" in pipeline