Revert "aws-sam-cli is now up-to-date upstream."

This reverts commit 9c64303.

Upstream aws-sam-cli doesn't build on macOS due to a python-watchdog
issue. See NixOS/nixpkgs#113777

flake.nix

@@ -107,6 +107,8 @@
           in
           (self.lib.flakes.filterPackagesByPlatform system
             {
+              inherit (pkgs) aws-sam-cli;
+
               inherit (pkgs) badhosts-unified;
               inherit (pkgs)
                 badhosts-fakenews badhosts-gambling badhosts-nsfw badhosts-social

nix/overlays/500-aws.nix

@@ -0,0 +1,8 @@
+final: prev:
+let
+  aws-sam-cli = final.callPackage ../pkgs/aws-sam-cli { };
+
+in
+{
+  inherit aws-sam-cli;
+}

nix/pkgs/aws-sam-cli/default.nix

@@ -0,0 +1,94 @@
+{ lib
+, python3
+, fetchFromGitHub
+, enableTelemetry ? false
+}:
+
+let
+
+  py = python3.override {
+    packageOverrides = self: super: {
+      aws-lambda-builders = super.aws-lambda-builders.overridePythonAttrs (oldAttrs: rec {
+        version = "1.3.0";
+        src = fetchFromGitHub {
+          owner = "awslabs";
+          repo = "aws-lambda-builders";
+          rev = "v${version}";
+          sha256 = "sha256-G5i60jr9t2g3beFIp7zDNVTuFqR6eZbZcErjosBlyrE=";
+        };
+      });
+      aws-sam-translator = super.aws-sam-translator.overridePythonAttrs (oldAttrs: rec {
+        version = "1.34.0";
+        src = oldAttrs.src.override {
+          inherit version;
+          sha256 = "sha256-hXxioD47tKP3B06Gf1LO1jbcBhksghbgBzISLyGiBsI=";
+        };
+      });
+      watchdog = super.watchdog.overridePythonAttrs (oldAttrs: rec {
+        version = "1.0.2";
+        src = oldAttrs.src.override {
+          inherit version;
+          sha256 = "sha256-N2y8KjXAOSsP5/8W+8GzA/2Z1N2ZEatVge6daa3IiYI=";
+        };
+        patches = [ ];
+        doCheck = false;
+      });
+      docker = super.docker.overridePythonAttrs (oldAttrs: {
+        doCheck = false;
+      });
+    };
+  };
+
+in
+py.pkgs.buildPythonApplication rec {
+  pname = "aws-sam-cli";
+  version = "1.20.0";
+
+  src = py.pkgs.fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-N4npYbkOUGGTmeDR5Yx0Z8ECkOW5kioRlACYXU/gA2c=";
+  };
+
+  # Tests are not included in the PyPI package
+  doCheck = false;
+
+  propagatedBuildInputs = with py.pkgs; [
+    aws-lambda-builders
+    aws-sam-translator
+    chevron
+    click
+    cookiecutter
+    dateparser
+    python-dateutil
+    docker
+    flask
+    jmespath
+    requests
+    serverlessrepo
+    tomlkit
+    watchdog
+  ];
+
+  postFixup = if enableTelemetry then "echo aws-sam-cli TELEMETRY IS ENABLED" else ''
+    # Disable telemetry: https://github.com/awslabs/aws-sam-cli/issues/1272
+    wrapProgram $out/bin/sam --set  SAM_CLI_TELEMETRY 0
+  '';
+
+  # fix over-restrictive version bounds
+  postPatch = ''
+    substituteInPlace requirements/base.txt \
+      --replace "boto3~=1.14.23" "boto3~=1.14" \
+      --replace "dateparser~=0.7" "dateparser>=0.7" \
+      --replace "docker~=4.2.0" "docker>=4.2.0" \
+      --replace "python-dateutil~=2.6, <2.8.1" "python-dateutil~=2.6" \
+      --replace "requests==2.23.0" "requests~=2.24" \
+      --replace "watchdog==0.10.3" "watchdog"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/awslabs/aws-sam-cli";
+    description = "CLI tool for local development and testing of Serverless applications";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ dhess ];
+  };
+}