[Backport 1.6.latest] Drop support for Python 3.8

.changes/unreleased/Breaking Changes-20241016-184157.yaml

@@ -0,0 +1,6 @@
+kind: Breaking Changes
+body: Drop support for Python 3.8
+time: 2024-10-16T18:41:57.721002-04:00
+custom:
+  Author: mikealfare
+  Issue: "1121"

.github/workflows/main.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.9'
 
       - name: Install python dependencies
         run: |
@@ -79,7 +79,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
 
     env:
       TOXENV: "unit"
@@ -131,7 +131,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.9'
 
       - name: Install python dependencies
         run: |
@@ -177,7 +177,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-12, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
 
     steps:
       - name: Set up Python ${{ matrix.python-version }}

.pre-commit-config.yaml

@@ -21,14 +21,14 @@ repos:
     additional_dependencies: ['click~=8.1']
     args:
     - "--line-length=99"
-    - "--target-version=py38"
+    - "--target-version=py39"
   - id: black
     alias: black-check
     stages: [manual]
     additional_dependencies: ['click~=8.1']
     args:
     - "--line-length=99"
-    - "--target-version=py38"
+    - "--target-version=py39"
     - "--check"
     - "--diff"
 - repo: https://github.com/pycqa/flake8

CONTRIBUTING.md

@@ -66,7 +66,7 @@ $EDITOR test.env
 There are a few methods for running tests locally.
 
 #### `tox`
-`tox` takes care of managing Python virtualenvs and installing dependencies in order to run tests. You can also run tests in parallel, for example you can run unit tests for Python 3.8, Python 3.9, and `flake8` checks in parallel with `tox -p`. Also, you can run unit tests for specific python versions with `tox -e py38`. The configuration of these tests are located in `tox.ini`.
+`tox` takes care of managing Python virtualenvs and installing dependencies in order to run tests. You can also run tests in parallel, for example you can run unit tests for Python 3.9 and `flake8` checks in parallel with `tox -p`. Also, you can run unit tests for specific python versions with `tox -e py39`. The configuration of these tests are located in `tox.ini`.
 
 #### `pytest`
 Finally, you can also run a specific test or group of tests using `pytest` directly. With a Python virtualenv active and dev dependencies installed you can do things like:

Makefile

@@ -37,14 +37,14 @@ linecheck: ## Checks for all Python lines 100 characters or more
 	find dbt -type f -name "*.py" -exec grep -I -r -n '.\{100\}' {} \;
 
 .PHONY: unit
-unit: ## Runs unit tests with py38.
+unit: ## Runs unit tests with py39.
 	@\
-	tox -e py38
+	tox -e py39
 
 .PHONY: test
-test: ## Runs unit tests with py38 and code checks against staged changes.
+test: ## Runs unit tests with py39 and code checks against staged changes.
 	@\
-	tox -p -e py38; \
+	tox -p -e py39; \
 	pre-commit run black-check --hook-stage manual | grep -v "INFO"; \
 	pre-commit run flake8-check --hook-stage manual | grep -v "INFO"; \
 	pre-commit run mypy-check --hook-stage manual | grep -v "INFO"

setup.py

@@ -4,9 +4,9 @@
 import re
 
 # require python 3.8 or newer
-if sys.version_info < (3, 8):
+if sys.version_info < (3, 9):
     print("Error: dbt does not support this version of Python.")
-    print("Please upgrade to Python 3.8 or higher.")
+    print("Please upgrade to Python 3.9 or higher.")
     sys.exit(1)
 
 # require version of setuptools that supports find_namespace_packages
@@ -89,10 +89,9 @@ def _get_dbt_core_version():
         "Operating System :: Microsoft :: Windows",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: POSIX :: Linux",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
     ],
-    python_requires=">=3.8",
+    python_requires=">=3.9",
 )

tox.ini

@@ -2,7 +2,7 @@
 skipsdist = True
 envlist = unit, flake8, integration-spark-thrift
 
-[testenv:{unit,py38,py39,py310,py}]
+[testenv:{unit,py39,py310,py}]
 allowlist_externals =
     /bin/bash
 commands = /bin/bash -c '{envpython} -m pytest -v {posargs} tests/unit'
@@ -16,7 +16,7 @@ deps =
 [testenv:integration-spark-databricks-http]
 allowlist_externals =
     /bin/bash
-basepython = python3.8
+basepython = python3.9
 commands = /bin/bash -c '{envpython} -m pytest -v --profile databricks_http_cluster {posargs} -n4 tests/functional/adapter/*'
 passenv =
     DBT_*
@@ -29,7 +29,7 @@ deps =
 [testenv:integration-spark-databricks-odbc-cluster]
 allowlist_externals =
     /bin/bash
-basepython = python3.8
+basepython = python3.9
 commands = /bin/bash -c '{envpython} -m pytest -v --profile databricks_cluster {posargs} -n4 tests/functional/adapter/*'
 passenv =
     DBT_*
@@ -43,7 +43,7 @@ deps =
 [testenv:integration-spark-databricks-odbc-sql-endpoint]
 allowlist_externals =
     /bin/bash
-basepython = python3.8
+basepython = python3.9
 commands = /bin/bash -c '{envpython} -m pytest -v --profile databricks_sql_endpoint {posargs} -n4 tests/functional/adapter/*'
 passenv =
     DBT_*
@@ -58,7 +58,7 @@ deps =
 [testenv:integration-spark-thrift]
 allowlist_externals =
     /bin/bash
-basepython = python3.8
+basepython = python3.9
 commands = /bin/bash -c '{envpython} -m pytest -v --profile apache_spark {posargs} -n4 tests/functional/adapter/*'
 passenv =
     DBT_*