Random bits of cleanup (#3914)

* Remove emilio-related Python script

The Emilio style checker was removed in #3674.

* Remove unused scripts from autotools days

* Update credo to support Elixir v1.12

* Ensure the bin directory sticks around

7 files changed, 3 insertions, 216 deletions

diff --git a/bin/.keep b/bin/.keep
new file mode 100644
index 000000000..ae3b7026e
--- /dev/null
+++ b/bin/.keep
@@ -0,0 +1 @@
+The build system expects to drop `rebar`, `rebar3` and `erlfmt` in here, and doesn't try to create the directory first.
diff --git a/bin/erlang-version.escript b/bin/erlang-version.escript
deleted file mode 100644
index 66aae1c41..000000000
--- a/bin/erlang-version.escript
+++ /dev/null
@@ -1,3 +0,0 @@
-
-main(_) ->
-  io:format("~s~n", [erlang:system_info(otp_release)]).
diff --git a/bin/warnings_in_scope b/bin/warnings_in_scope
deleted file mode 100755
index 2a854211a..000000000
--- a/bin/warnings_in_scope
+++ /dev/null
@@ -1,125 +0,0 @@
-#!/usr/bin/env python3
-import os
-import subprocess
-from pathlib import Path
-import optparse
-import sys
-import re
-
-def run(command, cwd=None):
-    try:
-        return subprocess.Popen(
-            command, shell=True, cwd=cwd,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE)
-    except OSError as err:
-        raise OSError("Error in command '{0}': {1}".format(command, err))
-
-def parse_location(line):
-    # take substring between @@
-    # take second part of it
-    location = line.split(b'@@')[1].strip().split(b' ')[1]
-    tokens = location.split(b',')
-    if len(tokens) == 1:
-        return (int(tokens[0][1:]), 1)
-    elif len(tokens) == 2:
-        return (int(tokens[0][1:]), int(tokens[1]))
-
-def changed_files(directory, scope):
-    result = {}
-    proc = run('git diff --no-prefix --unified={0}'.format(scope), cwd=str(directory))
-    file_path = None
-    for line in iter(proc.stdout.readline, b''):
-        if line.startswith(b'diff --git '):
-            # this would be problematic if directory has space in the name
-            file_name = line.split(b' ')[3].strip()
-            file_path = str(directory.joinpath(str(file_name, 'utf-8')))
-            result[file_path] = set()
-            continue
-        if line.startswith(b'@@'):
-            start_pos, number_of_lines = parse_location(line)
-            for line_number in range(start_pos, start_pos + number_of_lines):
-                result[file_path].add(line_number)
-    return result
-
-def print_changed(file_name, line_number):
-    print('{0}:{1}'.format(str(file_name), str(line_number)))
-
-def changes(dirs, scope):
-    result = {}
-    for directory in dirs:
-        result.update(changed_files(directory, scope))
-    return result
-
-def repositories(root):
-    for directory in Path(root).rglob('.git'):
-        if not directory.is_dir():
-            continue
-        yield directory.parent
-
-def setup_argparse():
-    parser = optparse.OptionParser(description="Filter output to remove unrelated warning")
-    parser.add_option(
-        "-r",
-        "--regexp",
-        dest="regexp",
-        default='(?P<file_name>[^:]+):(?P<line>\d+).*',
-        help="Regexp used to extract file_name and line number",
-    )
-    parser.add_option(
-        "-s",
-        "--scope",
-        dest="scope",
-        default=0,
-        help="Number of lines surrounding the change we consider relevant",
-    )
-    parser.add_option(
-        "-p",
-        "--print-only",
-        action="store_true",
-        dest="print_only",
-        default=False,
-        help="Print changed lines only",
-    )
-    return parser.parse_args()
-
-def filter_stdin(regexp, changes):
-    any_matches = False
-    for line in iter(sys.stdin.readline, ''):
-        matches = re.match(regexp, line)
-        if matches:
-            file_name = matches.group('file_name')
-            line_number = int(matches.group('line'))
-            if file_name in changes and line_number in changes[file_name]:
-                print(line, end='')
-                any_matches = True
-    return any_matches
-
-def validate_regexp(regexp):
-    index = regexp.groupindex
-    if 'file_name' in index and 'line' in index:
-        return True
-    else:
-        raise TypeError("Regexp must define following groups:\n  - file_name\n  - line")
-
-def main():
-    opts, args = setup_argparse()
-    if opts.print_only:
-        for file_name, changed_lines in changes(repositories('.'), opts.scope).items():
-            for line_number in changed_lines:
-                print_changed(file_name, line_number)
-        return 0
-    else:
-        regexp = re.compile(opts.regexp)
-        validate_regexp(regexp)
-        if filter_stdin(regexp, changes(repositories('.'), opts.scope)):
-            return 1
-        else:
-            return 0
-
-if __name__ == "__main__":
-    try:
-        sys.exit(main())
-    except KeyboardInterrupt:
-        pass
-
diff --git a/build-aux/dist-error b/build-aux/dist-error
deleted file mode 100755
index 73486b5db..000000000
--- a/build-aux/dist-error
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh -e
-
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-# This script is called by the build system and is used to provide an error
-# about missing or empty files. Some files are optional, and will be built when
-# the environment allows. But these files are required for distribution.
-
-cat << EOF
-ERROR: This file is missing or incomplete:
-
-       $1
-
-       This file is optional at build and install time,
-       but is required when preparing a distribution.
-EOF
-
-exit 1
diff --git a/build-aux/sphinx-build b/build-aux/sphinx-build
deleted file mode 100755
index 8ecf43a55..000000000
--- a/build-aux/sphinx-build
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/bin/sh -e
-
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-# This script is called by the build system and is used to call sphinx-build if
-# is is available, or alternatively, emit a warning, and perform a no-op. Any
-# required directories or Makefiles are created and stubbed out as appropriate.
-
-if test -z "`which sphinx-build`"; then
-    missing=yes
-    cat << EOF
-WARNING: 'sphinx-build' is needed, and is missing on your system.
-         You might have modified some files without having the
-         proper tools for further handling them.
-EOF
-fi
-
-if test "$2" = "html"; then
-    if test "$missing" != "yes"; then
-        sphinx-build $*
-    else
-        mkdir -p html
-    fi
-fi
diff --git a/build-aux/sphinx-touch b/build-aux/sphinx-touch
deleted file mode 100755
index ed7217de2..000000000
--- a/build-aux/sphinx-touch
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/sh -e
-
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-
-# This script is called by the build system and is used to touch the list of
-# expected output files when sphinx-build is not available. If the files exist,
-# this will satisfy make. If they do not exist, we create of empty files.
-
-if test -z "`which sphinx-build`"; then
-    for file in $*; do
-        mkdir -p `dirname $file`
-        touch $file
-    done
-fi
\ No newline at end of file
diff --git a/mix.lock b/mix.lock
index 505d7f22e..48e7c719f 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,14 +1,14 @@
 %{
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm", "7af5c7e09fe1d40f76c8e4f9dd2be7cebd83909f31fee7cd0e9eadc567da8353"},
   "certifi": {:hex, :certifi, "2.5.1", "867ce347f7c7d78563450a18a6a28a8090331e77fa02380b4a21962a65d36ee5", [:rebar3], [{:parse_trans, "~>3.3", [hex: :parse_trans, repo: "hexpm", optional: false]}], "hexpm", "805abd97539caf89ec6d4732c91e62ba9da0cda51ac462380bbd28ee697a8c42"},
-  "credo": {:hex, :credo, "1.5.4", "9914180105b438e378e94a844ec3a5088ae5875626fc945b7c1462b41afc3198", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "cf51af45eadc0a3f39ba13b56fdac415c91b34f7b7533a13dc13550277141bc4"},
+  "credo": {:hex, :credo, "1.5.6", "e04cc0fdc236fefbb578e0c04bd01a471081616e741d386909e527ac146016c6", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "4b52a3e558bd64e30de62a648518a5ea2b6e3e5d2b164ef5296244753fc7eb17"},
   "excoveralls": {:hex, :excoveralls, "0.12.1", "a553c59f6850d0aff3770e4729515762ba7c8e41eedde03208182a8dc9d0ce07", [:mix], [{:hackney, "~> 1.0", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "5c1f717066a299b1b732249e736c5da96bb4120d1e55dc2e6f442d251e18a812"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "hackney": {:hex, :hackney, "1.15.2", "07e33c794f8f8964ee86cebec1a8ed88db5070e52e904b8f12209773c1036085", [:rebar3], [{:certifi, "2.5.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "6.0.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.5", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm", "e0100f8ef7d1124222c11ad362c857d3df7cb5f4204054f9f0f4a728666591fc"},
   "httpotion": {:hex, :httpotion, "3.1.3", "fdaf1e16b9318dcb722de57e75ac368c93d4c6e3c9125f93e960f953a750fb77", [:mix], [{:ibrowse, "== 4.4.0", [hex: :ibrowse, repo: "hexpm", optional: false]}], "hexpm", "e420172ef697a0f1f4dc40f89a319d5a3aad90ec51fa424f08c115f04192ae43"},
   "ibrowse": {:hex, :ibrowse, "4.4.0", "2d923325efe0d2cb09b9c6a047b2835a5eda69d8a47ed6ff8bc03628b764e991", [:rebar3], [], "hexpm"},
   "idna": {:hex, :idna, "6.0.0", "689c46cbcdf3524c44d5f3dde8001f364cd7608a99556d8fbd8239a5798d4c10", [:rebar3], [{:unicode_util_compat, "0.4.1", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "4bdd305eb64e18b0273864920695cb18d7a2021f31a11b9c5fbcd9a253f936e2"},
-  "jason": {:hex, :jason, "1.2.2", "ba43e3f2709fd1aa1dce90aaabfd039d000469c05c56f0b8e31978e03fa39052", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "18a228f5f0058ee183f29f9eae0805c6e59d61c3b006760668d8d18ff0d12179"},
+  "jason": {:hex, :jason, "1.3.0", "fa6b82a934feb176263ad2df0dbd91bf633d4a46ebfdffea0c8ae82953714946", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "53fc1f51255390e0ec7e50f9cb41e751c260d065dcba2bf0d08dc51a4002c2ac"},
   "jiffy": {:hex, :jiffy, "0.15.2", "de266c390111fd4ea28b9302f0bc3d7472468f3b8e0aceabfbefa26d08cd73b7", [:rebar3], [], "hexpm"},
   "junit_formatter": {:hex, :junit_formatter, "3.0.0", "13950d944dbd295da7d8cc4798b8faee808a8bb9b637c88069954eac078ac9da", [:mix], [], "hexpm", "d77b7b9a1601185b18dfe7682b27c46d5d12721f12fdc75180a6fc573b4e64b1"},
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},