Merge remote-tracking branch 'upstream/main' into groupby-plot

* upstream/main: (307 commits)
  Use same bool validator as other inputs (pydata#5703)
  conditionally disable bottleneck (pydata#5560)
  Refactor index vs. coordinate variable(s) (pydata#5636)
  pre-commit: autoupdate hook versions (pydata#5685)
  Flexible Indexes: Avoid len(index) in map_blocks (pydata#5670)
  Speed up _mapping_repr (pydata#5661)
  update the link to `scipy`'s intersphinx file (pydata#5665)
  Bump styfle/cancel-workflow-action from 0.9.0 to 0.9.1 (pydata#5663)
  pre-commit: autoupdate hook versions (pydata#5660)
  fix the binder environment (pydata#5650)
  Update api.rst (pydata#5639)
  Kwargs to rasterio open (pydata#5609)
  Bump codecov/codecov-action from 1 to 2.0.2 (pydata#5633)
  new blank whats-new for v0.19.1
  v0.19.0 release notes (pydata#5632)
  remove deprecations scheduled for 0.19 (pydata#5630)
  Make typing-extensions optional (pydata#5624)
  Plots get labels from pint arrays (pydata#5561)
  Add to_numpy() and as_numpy() methods (pydata#5568)
  pin fsspec (pydata#5627)
  ...

Author: dcherian

.binder/environment.yml

@@ -2,7 +2,7 @@ name: xarray-examples
 channels:
   - conda-forge
 dependencies:
-  - python=3.8
+  - python=3.9
   - boto3
   - bottleneck
   - cartopy
@@ -26,6 +26,7 @@ dependencies:
   - pandas
   - pint
   - pip
+  - pooch
   - pydap
   - pynio
   - rasterio

.git_archival.txt

@@ -0,0 +1 @@
+ref-names: $Format:%D$

.gitattributes

@@ -1,2 +1,4 @@
 # reduce the number of merge conflicts
 doc/whats-new.rst merge=union
+# allow installing from git archives
+.git_archival.txt  export-subst

.github/actions/detect-ci-trigger/action.yaml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      # Check for updates once a week
+      interval: 'weekly'

.github/actions/detect-ci-trigger/script.sh

@@ -0,0 +1,15 @@
+name: Cancel
+on:
+  workflow_run:
+    workflows: ["CI", "CI Additional", "CI Upstream"]
+    types:
+      - requested
+jobs:
+  cancel:
+    name: Cancel previous runs
+    runs-on: ubuntu-latest
+    if: github.repository == 'pydata/xarray'
+    steps:
+    - uses: styfle/[email protected]
+      with:
+        workflow_id: ${{ github.event.workflow.id }}

.github/dependabot.yml

@@ -12,14 +12,16 @@ jobs:
   detect-ci-trigger:
     name: detect ci trigger
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' || github.event_name == 'pull_request'
+    if: |
+      github.repository == 'pydata/xarray'
+      && (github.event_name == 'push' || github.event_name == 'pull_request')
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 2
-      - uses: ./.github/actions/detect-ci-trigger
+      - uses: xarray-contrib/ci-trigger@v1.1
         id: detect-trigger
         with:
           keyword: "[skip-ci]"
@@ -42,26 +44,16 @@ jobs:
             "py37-min-all-deps",
             "py37-min-nep18",
             "py38-all-but-dask",
-            "py38-backend-api-v2",
             "py38-flaky",
           ]
     steps:
-      - name: Cancel previous runs
-        uses: styfle/[email protected]
-        with:
-          access_token: ${{ github.token }}
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
 
       - name: Set environment variables
         run: |
-          if [[ ${{ matrix.env }} == "py38-backend-api-v2" ]] ;
-          then
-            echo "CONDA_ENV_FILE=ci/requirements/environment.yml" >> $GITHUB_ENV
-            echo "XARRAY_BACKEND_API=v2" >> $GITHUB_ENV
-
-          elif [[ ${{ matrix.env }} == "py38-flaky" ]] ;
+          if [[ ${{ matrix.env }} == "py38-flaky" ]] ;
           then
             echo "CONDA_ENV_FILE=ci/requirements/environment.yml" >> $GITHUB_ENV
             echo "PYTEST_EXTRA_FLAGS=--run-flaky --run-network-tests" >> $GITHUB_ENV
@@ -111,7 +103,7 @@ jobs:
              $PYTEST_EXTRA_FLAGS
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2.0.2
         with:
           file: ./coverage.xml
           flags: unittests,${{ matrix.env }}
@@ -121,17 +113,12 @@ jobs:
   doctest:
     name: Doctests
     runs-on: "ubuntu-latest"
-    needs: detect-ci-trigger
-    if: needs.detect-ci-trigger.outputs.triggered == 'false'
+    if: github.repository == 'pydata/xarray'
     defaults:
       run:
         shell: bash -l {0}
 
     steps:
-      - name: Cancel previous runs
-        uses: styfle/[email protected]
-        with:
-          access_token: ${{ github.token }}
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
@@ -169,10 +156,6 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - name: Cancel previous runs
-        uses: styfle/[email protected]
-        with:
-          access_token: ${{ github.token }}
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
@@ -186,6 +169,6 @@ jobs:
 
       - name: minimum versions policy
         run: |
-          mamba install -y pyyaml conda
+          mamba install -y pyyaml conda python-dateutil
           python ci/min_deps_check.py ci/requirements/py37-bare-minimum.yml
           python ci/min_deps_check.py ci/requirements/py37-min-all-deps.yml

.github/workflows/cancel-duplicate-runs.yaml

@@ -0,0 +1,44 @@
+name: "pre-commit autoupdate CI"
+
+on:
+  schedule:
+    - cron: "0 0 * * 0"  # every Sunday at 00:00 UTC
+  workflow_dispatch:
+
+
+jobs:
+  autoupdate:
+    name: 'pre-commit autoupdate'
+    runs-on: ubuntu-latest
+    if: github.repository == 'pydata/xarray'
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Cache pip and pre-commit
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cache/pre-commit
+            ~/.cache/pip
+          key: ${{ runner.os }}-pre-commit-autoupdate
+      - name: setup python
+        uses: actions/setup-python@v2
+      - name: upgrade pip
+        run: python -m pip install --upgrade pip
+      - name: install dependencies
+        run: python -m pip install --upgrade pre-commit pyyaml packaging
+      - name: version info
+        run: python -m pip list
+      - name: autoupdate
+        uses: technote-space/create-pr-action@837dbe469b39f08d416889369a52e2a993625c84
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          EXECUTE_COMMANDS: |
+            python -m pre_commit autoupdate
+            python -m pre_commit run --all-files
+          COMMIT_MESSAGE: 'pre-commit: autoupdate hook versions'
+          COMMIT_NAME: 'github-actions[bot]'
+          COMMIT_EMAIL: 'github-actions[bot]@users.noreply.github.com'
+          PR_TITLE: 'pre-commit: autoupdate hook versions'
+          PR_BRANCH_PREFIX: 'pre-commit/'
+          PR_BRANCH_NAME: 'autoupdate-${PR_ID}'

.github/workflows/ci-additional.yaml

@@ -10,7 +10,8 @@ jobs:
   linting:
     name: "pre-commit hooks"
     runs-on: ubuntu-latest
+    if: github.repository == 'pydata/xarray'
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
-      - uses: pre-commit/[email protected].0
+      - uses: pre-commit/[email protected].3