Workflow improvements

.editorconfig

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+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_size = 2

.flake8

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+# https://flake8.pycqa.org/en/latest/user/configuration.html#configuration-locations
+# +
+# https://github.com/psf/black/blob/master/docs/the_black_code_style.md#line-length
+[flake8]
+# black wraps at 88
+max-line-length = 90
+extend-ignore = E203

.gitattributes

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+# make github collapse diffs for generated files within PRs
+# https://github.com/github/linguist#generated-code
+
+# make github know about vendored code
+# https://github.com/github/linguist#vendored-code
+**/vendor/** linguist-vendored
+
+# OWNERS files are YAML
+OWNERS linguist-language=Yaml
+**/OWNERS linguist-language=Yaml
+OWNERS_ALIASES linguist-language=Yaml

.github/dependabot.yml

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+---
+version: 2
+updates:
+  - package-ecosystem: pip
+    directory: /ci
+    schedule:
+      interval: daily
+  - package-ecosystem: pip
+    directory: /python
+    schedule:
+      interval: daily

.pre-commit-config.yaml

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+---
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+
+# ignore:
+# vendor'd code (that has vendor in its path)
+exclude: vendor
+
+repos:
+  - repo: https://github.com/adrienverge/yamllint
+    rev: v1.25.0
+    hooks:
+      - id: yamllint
+        args:
+          - --format=parsable
+          - --strict
+
+  - repo: https://github.com/jumanjihouse/pre-commit-hook-yamlfmt
+    rev: 0.1.0  # or higher tag
+    hooks:
+      - id: yamlfmt
+        args:
+          - --mapping=2
+          - --sequence=4
+          - --offset=2
+          - --width=1200    # match .yamllint.yaml; we don't care about line-length.
+        exclude: repocop.yaml
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.3.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-byte-order-marker
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-symlinks
+      - id: detect-private-key
+      - id: end-of-file-fixer
+      - id: forbid-new-submodules
+      - id: mixed-line-ending
+      - id: pretty-format-json
+        args:
+          - --autofix
+      - id: trailing-whitespace
+
+  - repo: https://github.com/syntaqx/git-hooks
+    rev: v0.0.16
+    hooks:
+      - id: forbid-binary
+        # Exclude png and server.zip forbid, we can check these in.
+        exclude: ^.+\.(png|server\.zip)$
+      # See checks in shellcheck wiki: https://github.com/koalaman/shellcheck/wiki/
+      - id: shellcheck
+      - id: shfmt
+        # do not use these args (yet):
+        # -s, simplify code
+        # -mn, minify to reduce its size
+        args:
+          - -w      # autofix in place
+          - -d      # show diff
+          - -i=2    # indent 2 spaces
+
+  - repo: https://github.com/PyCQA/pylint
+    rev: pylint-2.6.0
+    hooks:
+      - id: pylint
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.4
+    hooks:
+      - id: flake8
+
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+        args:
+          - --skip-string-normalization

.yamllint.yaml

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+---
+# https://yamllint.readthedocs.io/en/stable/configuration.html#default-configuration
+extends: default
+
+yaml-files:
+  - .toolsharerc
+  - .yamllint.yaml
+  - '*.yaml'
+  - '*.yml'
+  - OWNERS_ALIASES
+  - OWNERS
+
+rules:
+  document-start:
+    level: error
+  line-length:
+    max: 1200
+    level: warning

ci/requirements.txt

@@ -1,2 +1,3 @@
+pre-commit==2.7.1
 pytest==4.5.0
 pylint==2.3.1