Use legacy pip installer for Poetry to respect PIP_INDEX_URL

Poetry's modern installer resolves directly from pypi.org, ignoring
PIP_INDEX_URL. Setting installer.modern-installation=false makes Poetry
use pip for installation, which respects PIP_INDEX_URL and routes
through JFrog. This avoids modifying pyproject.toml in CI.

Co-authored-by: Isaac
Signed-off-by: Vikrant Puppala <vikrant.puppala@databricks.com>

Author: vikrantpuppala

.github/workflows/code-quality-checks.yml

@@ -36,12 +36,7 @@ jobs:
                   poetry config virtualenvs.create true
                   poetry config virtualenvs.in-project true
                   poetry config installer.parallel true
-            - name: Configure Poetry JFrog source
-              run: |
-                  poetry config repositories.jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry config http-basic.jfrog gha-service-account "${JFROG_ACCESS_TOKEN}"
-                  poetry source add --priority=primary jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry lock --no-update
+                  poetry config installer.modern-installation false
             - name: Load cached venv
               id: cached-poetry-dependencies
               uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
@@ -79,12 +74,7 @@ jobs:
                   poetry config virtualenvs.create true
                   poetry config virtualenvs.in-project true
                   poetry config installer.parallel true
-            - name: Configure Poetry JFrog source
-              run: |
-                  poetry config repositories.jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry config http-basic.jfrog gha-service-account "${JFROG_ACCESS_TOKEN}"
-                  poetry source add --priority=primary jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry lock --no-update
+                  poetry config installer.modern-installation false
             - name: Load cached venv
               id: cached-poetry-dependencies
               uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4

.github/workflows/integration.yml

@@ -40,12 +40,7 @@ jobs:
                   poetry config virtualenvs.create true
                   poetry config virtualenvs.in-project true
                   poetry config installer.parallel true
-            - name: Configure Poetry JFrog source
-              run: |
-                  poetry config repositories.jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry config http-basic.jfrog gha-service-account "${JFROG_ACCESS_TOKEN}"
-                  poetry source add --priority=primary jfrog https://databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple
-                  poetry lock --no-update
+                  poetry config installer.modern-installation false
             - name: Load cached venv
               id: cached-poetry-dependencies
               uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4