infra: read min versions (#17135)

.github/scripts/get_min_versions.py

@@ -0,0 +1,65 @@
+import sys
+
+import tomllib
+from packaging.version import parse as parse_version
+import re
+
+MIN_VERSION_LIBS = ["langchain-core", "langchain-community", "langchain"]
+
+
+def get_min_version(version: str) -> str:
+    # case ^x.x.x
+    _match = re.match(r"^\^(\d+(?:\.\d+){0,2})$", version)
+    if _match:
+        return _match.group(1)
+
+    # case >=x.x.x,<y.y.y
+    _match = re.match(r"^>=(\d+(?:\.\d+){0,2}),<(\d+(?:\.\d+){0,2})$", version)
+    if _match:
+        _min = _match.group(1)
+        _max = _match.group(2)
+        assert parse_version(_min) < parse_version(_max)
+        return _min
+
+    # case x.x.x
+    _match = re.match(r"^(\d+(?:\.\d+){0,2})$", version)
+    if _match:
+        return _match.group(1)
+
+    raise ValueError(f"Unrecognized version format: {version}")
+
+
+def get_min_version_from_toml(toml_path: str):
+    # Parse the TOML file
+    with open(toml_path, "rb") as file:
+        toml_data = tomllib.load(file)
+
+    # Get the dependencies from tool.poetry.dependencies
+    dependencies = toml_data["tool"]["poetry"]["dependencies"]
+
+    # Initialize a dictionary to store the minimum versions
+    min_versions = {}
+
+    # Iterate over the libs in MIN_VERSION_LIBS
+    for lib in MIN_VERSION_LIBS:
+        # Check if the lib is present in the dependencies
+        if lib in dependencies:
+            # Get the version string
+            version_string = dependencies[lib]
+
+            # Use parse_version to get the minimum supported version from version_string
+            min_version = get_min_version(version_string)
+
+            # Store the minimum version in the min_versions dictionary
+            min_versions[lib] = min_version
+
+    return min_versions
+
+
+# Get the TOML file path from the command line argument
+toml_file = sys.argv[1]
+
+# Call the function to get the minimum versions
+min_versions = get_min_version_from_toml(toml_file)
+
+print(" ".join([f"{lib}=={version}" for lib, version in min_versions.items()]))

.github/workflows/_release.yml

@@ -15,7 +15,7 @@ on:
         default: 'libs/langchain'
 
 env:
-  PYTHON_VERSION: "3.10"
+  PYTHON_VERSION: "3.11"
   POETRY_VERSION: "1.7.1"
 
 jobs:
@@ -181,10 +181,15 @@ jobs:
         run: make integration_tests
         working-directory: ${{ inputs.working-directory }}
 
+      - name: Get minimum versions
+        id: check-version
+        run: echo "min-versions=$(python $GITHUB_WORKSPACE/.github/scripts/get_min_versions.py pyproject.toml)"" >> $GITHUB_OUTPUT
+
       - name: Run unit tests with minimum dependency versions
-        if: ${{ (inputs.working-directory == 'libs/langchain') || (inputs.working-directory == 'libs/community') || (inputs.working-directory == 'libs/experimental') }}
+        env:
+          MIN_VERSIONS: ${{ steps.check-version.outputs.min-versions }}
         run: |
-          poetry run pip install -r _test_minimum_requirements.txt
+          poetry run pip install $MIN_VERSIONS
           make tests
         working-directory: ${{ inputs.working-directory }}