From ebb534e6243274c56d56580c67f20d91c77c6106 Mon Sep 17 00:00:00 2001
From: Fangchen Li <fangchen.li@outlook.com>
Date: Fri, 13 Nov 2020 20:27:32 -0600
Subject: [PATCH] Backport PR #37039: CI: move py39 build to conda #33948

---
 .travis.yml           | 10 +---------
 ci/azure/posix.yml    |  5 +++++
 ci/build39.sh         | 13 -------------
 ci/deps/azure-39.yaml | 17 +++++++++++++++++
 ci/setup_env.sh       |  5 -----
 5 files changed, 23 insertions(+), 27 deletions(-)
 delete mode 100755 ci/build39.sh
 create mode 100644 ci/deps/azure-39.yaml

diff --git a/.travis.yml b/.travis.yml
index 1e5ea21b0f2d9..f43f4a1d16ff8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,14 +29,6 @@ matrix:
   fast_finish: true
 
   include:
-    # In allowed failures
-    - dist: bionic
-      python: 3.9-dev
-      env:
-        - JOB="3.9-dev" PATTERN="(not slow and not network and not clipboard)"
-    - env:
-        - JOB="3.8" ENV_FILE="ci/deps/travis-38.yaml" PATTERN="(not slow and not network and not clipboard)"
-
     - env:
         - JOB="3.7" ENV_FILE="ci/deps/travis-37.yaml" PATTERN="(not slow and not network and not clipboard)"
 
@@ -92,7 +84,7 @@ install:
 script:
   - echo "script start"
   - echo "$JOB"
-  - if [ "$JOB" != "3.9-dev" ]; then source activate pandas-dev; fi
+  - source activate pandas-dev
   - ci/run_tests.sh
 
 after_script:
diff --git a/ci/azure/posix.yml b/ci/azure/posix.yml
index f716974f6add1..457a1f3f507d4 100644
--- a/ci/azure/posix.yml
+++ b/ci/azure/posix.yml
@@ -65,6 +65,11 @@ jobs:
           PANDAS_TESTING_MODE: "deprecate"
           EXTRA_APT: "xsel"
 
+        py39:
+          ENV_FILE: ci/deps/azure-39.yaml
+          CONDA_PY: "39"
+          PATTERN: "not slow and not network and not clipboard"
+
   steps:
     - script: |
         if [ "$(uname)" == "Linux" ]; then
diff --git a/ci/build39.sh b/ci/build39.sh
deleted file mode 100755
index f2ef11d5a71f4..0000000000000
--- a/ci/build39.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/bash -e
-# Special build for python3.9 until numpy puts its own wheels up
-
-sudo apt-get install build-essential gcc xvfb
-pip install --no-deps -U pip wheel setuptools
-pip install cython numpy python-dateutil pytz pytest pytest-xdist hypothesis
-
-python setup.py build_ext -inplace
-python -m pip install --no-build-isolation -e .
-
-python -c "import sys; print(sys.version_info)"
-python -c "import pandas as pd"
-python -c "import hypothesis"
diff --git a/ci/deps/azure-39.yaml b/ci/deps/azure-39.yaml
new file mode 100644
index 0000000000000..67edc83a9d738
--- /dev/null
+++ b/ci/deps/azure-39.yaml
@@ -0,0 +1,17 @@
+name: pandas-dev
+channels:
+  - conda-forge
+dependencies:
+  - python=3.9.*
+
+  # tools
+  - cython>=0.29.21
+  - pytest>=5.0.1
+  - pytest-xdist>=1.21
+  - hypothesis>=3.58.0
+  - pytest-azurepipelines
+
+  # pandas dependencies
+  - numpy
+  - python-dateutil
+  - pytz
diff --git a/ci/setup_env.sh b/ci/setup_env.sh
index 065f9e56ea171..9adb6fe674099 100755
--- a/ci/setup_env.sh
+++ b/ci/setup_env.sh
@@ -1,10 +1,5 @@
 #!/bin/bash -e
 
-if [ "$JOB" == "3.9-dev" ]; then
-    /bin/bash ci/build39.sh
-    exit 0
-fi
-
 # edit the locale file if needed
 if [[ "$(uname)" == "Linux" && -n "$LC_ALL" ]]; then
     echo "Adding locale to the first line of pandas/__init__.py"