Remove pylint check (#985)

* Remove pylint check

This PR removes pylint check, as was discussed in 980.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Also remove pylint in .github/workflows/build.yml

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Add empty commit to push GitHub CI

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Author: yongtang

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
           BAZEL_OS=$(uname | tr '[:upper:]' '[:lower:]')
           curl -sSOL https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-${BAZEL_OS}-x86_64.sh
           sudo bash -e bazel-${BAZEL_VERSION}-installer-${BAZEL_OS}-x86_64.sh
-          bazel run -s --verbose_failures //tools/lint:check -- bazel pylint pyupgrade black
+          bazel run -s --verbose_failures //tools/lint:check -- bazel pyupgrade black
 
   macos:
     name: macOS

README.md

@@ -114,7 +114,7 @@ version of TensorFlow I/O according to the table below:
 
 ### Lint
 
-TensorFlow I/O's code conforms through Pylint, Bazel Buildifier, Clang Format, Black, and Pyupgrade. The following will check the source code and report any lint issues:
+TensorFlow I/O's code conforms through Bazel Buildifier, Clang Format, Black, and Pyupgrade. The following will check the source code and report any lint issues:
 ```sh
 bazel run //tools/lint:check
 ```
@@ -124,11 +124,11 @@ For Bazel Buildifier and Clang Format, the following will automatically fix and
 bazel run //tools/lint:lint
 ```
 
-Alternatively, if you only want to perform lint check on one aespect, then you can selectively pass `pylint`, `bazel`, or `clang` from the above commands.
+Alternatively, if you only want to perform one lint check individually, then you can selectively pass `black`, `pyupgrade`, `bazel`, or `clang` from the above commands.
 
-For example, check with Pylint only could be done with:
+For example, check with `black` only could be done with:
 ```
-bazel run //tools/lint:check -- pylint
+bazel run //tools/lint:check -- black
 ```
 
 Fix with Bazel Buildifier or Clang Format could be done with:

tools/lint/BUILD

@@ -62,38 +62,6 @@ genrule(
     ],
 )
 
-py_binary(
-    name = "pylint_py",
-    srcs = ["pylint_python.py"],
-    main = "pylint_python.py",
-    deps = [
-        requirement("pylint"),
-        requirement("wrapt"),
-        requirement("astroid"),
-        requirement("isort"),
-        requirement("lazy_object_proxy"),
-    ],
-)
-
-filegroup(
-    name = "pylint_rc",
-    srcs = [
-        "pylint_python.rc",
-    ],
-)
-
-genrule(
-    name = "pylint",
-    srcs = [],
-    outs = ["pylint"],
-    cmd = "echo '$(location :pylint_py) --rcfile=$(location :pylint_rc) \"$$@\"' > $@",
-    executable = True,
-    tools = [
-        ":pylint_py",
-        ":pylint_rc",
-    ],
-)
-
 genrule(
     name = "clang_format",
     srcs = ["@llvm_toolchain//:bin/clang-format"],

tools/lint/defs.bzl

@@ -5,7 +5,6 @@ def _lint_impl(ctx):
     substitutions = {
         "@@MODE@@": shell.quote(ctx.attr.mode),
         "@@BLACK_PATH@@": shell.quote(ctx.executable._black.short_path),
-        "@@PYLINT_PATH@@": shell.quote(ctx.executable._pylint.short_path),
         "@@BUILDIFIER_PATH@@": shell.quote(ctx.executable._buildifier.short_path),
         "@@CLANG_FORMAT_PATH@@": shell.quote(ctx.executable._clang_format.short_path),
         "@@PYUPGRADE_PATH@@": shell.quote(ctx.executable._pyupgrade.short_path),
@@ -16,7 +15,7 @@ def _lint_impl(ctx):
         substitutions = substitutions,
         is_executable = True,
     )
-    runfiles = ctx.runfiles(files = [ctx.executable._buildifier, ctx.executable._clang_format, ctx.executable._pylint, ctx.executable._black, ctx.executable._pyupgrade])
+    runfiles = ctx.runfiles(files = [ctx.executable._buildifier, ctx.executable._clang_format, ctx.executable._black, ctx.executable._pyupgrade])
     return [DefaultInfo(
         files = depset([bash_file]),
         runfiles = runfiles,
@@ -36,11 +35,6 @@ _lint = rule(
             cfg = "host",
             executable = True,
         ),
-        "_pylint": attr.label(
-            default = "//tools/lint:pylint",
-            cfg = "host",
-            executable = True,
-        ),
         "_buildifier": attr.label(
             default = "@com_github_bazelbuild_buildtools//buildifier",
             cfg = "host",

tools/lint/lint.tpl

@@ -8,14 +8,12 @@ echo "$MODE: " $@
 RUN_BAZEL=no
 RUN_BLACK=no
 RUN_CLANG=no
-RUN_PYLINT=no
 RUN_PYUPGRADE=no
 RUN_ENTRIES=all
 if [[ $# -eq 0 ]]; then
   RUN_BAZEL=true
   RUN_BLACK=true
   RUN_CLANG=true
-  RUN_PYLINT=true
   RUN_PYUPGRADE=true
 else
   while [[ $# -gt 0 ]]; do
@@ -31,10 +29,6 @@ else
       shift
       echo "$MODE: " clang
       RUN_CLANG=true
-    elif [[ "$1" == "pylint" ]]; then
-      shift
-      echo "$MODE: " pylint
-      RUN_PYLINT=true
     elif [[ "$1" == "pyupgrade" ]]; then
       shift
       echo "$MODE: " pyupgrade
@@ -51,38 +45,26 @@ else
   done
 fi
 
-echo "Selected: Bazel=$RUN_BAZEL Black=$RUN_BLACK Clang=$RUN_CLANG Pylint=$RUN_PYLINT Pyupgrade=$RUN_PYUPGRADE [Entries]: $RUN_ENTRIES"
+echo "Selected: Bazel=$RUN_BAZEL Black=$RUN_BLACK Clang=$RUN_CLANG Pyupgrade=$RUN_PYUPGRADE [Entries]: $RUN_ENTRIES"
 
 BLACK_PATH=@@BLACK_PATH@@
-PYLINT_PATH=@@PYLINT_PATH@@
 BUILDIFIER_PATH=@@BUILDIFIER_PATH@@
 CLANG_FORMAT_PATH=@@CLANG_FORMAT_PATH@@
 PYUPGRADE_PATH=@@PYUPGRADE_PATH@@
 
 mode="$MODE"
 
 black_path=$(readlink "$BLACK_PATH")
-pylint_path=$(readlink "$PYLINT_PATH")
 buildifier_path=$(readlink "$BUILDIFIER_PATH")
 clang_format_path=$(readlink "$CLANG_FORMAT_PATH")
 pyupgrade_path=$(readlink "$PYUPGRADE_PATH")
 
 echo "mode:" $mode
 echo "black:" $black_path
-echo "pylint:" $pylint_path
 echo "buildifier:" $buildifier_path
 echo "clang-format:" $clang_format_path
 echo "pyupgrade:" $pyupgrade_path
 
-if [[ "$mode" == "lint" ]]; then
-  if [[ "$RUN_PYLINT" == "true" ]]; then
-    echo
-    echo "WARN: pylint does not have lint mode, use check instead"
-    echo
-  fi
-fi
-
-
 black_func() {
   echo $1 $2
   if [[ "$1" == "lint" ]]; then
@@ -92,16 +74,6 @@ black_func() {
   fi
 }
 
-pylint_func() {
-  echo $1 $2
-  # Note: --indent-string='    ' to override google 2 spaces and match black
-  # Note: --max-line-length=88 to override default and match black
-  # Note: --disable=bad-continuation to avoid conflict with black
-  # TODO: --disable=abstract-method should be removed eventually
-  # TODO: --disable=abstract-class-instantiated should be removed eventually
-  $pylint_path --indent-string='    ' --max-line-length=88 --disable=bad-continuation --disable=abstract-method --disable=abstract-class-instantiated $2
-}
-
 buildifier_func() {
   echo $1 $2
   if [[ "$1" == "lint" ]]; then
@@ -157,31 +129,6 @@ fi
 fi
 
 
-if [[ "$RUN_PYLINT" == "true" ]]; then
-echo "Run Pylint"
-
-if [[ "$RUN_ENTRIES" == "--" ]]; then
-( \
-    cd "$BUILD_WORKSPACE_DIRECTORY" && \
-    for i in $@ ; do \
-        pylint_func $mode "$i" ; \
-    done \
-)
-else
-( \
-    cd "$BUILD_WORKSPACE_DIRECTORY" && \
-    for i in \
-        $( \
-            find tensorflow_io tests -type f \
-                \( -name '*.py' \) \
-        ) ; do \
-        pylint_func $mode "$i" ; \
-    done \
-)
-fi
-
-fi
-
 if [[ "$RUN_BAZEL" == "true" ]]; then
 echo "Run Bazel Buildifier"