go: re-do the entire thing

This is a mega-change, but attempting to split this up further is
probably not worth the effort.

Summary:

1. Bump up bazel, rules_go, and others.
2. Switch to new go target naming (bye bye go_default_library)
3. Move go deps to go.mod/go.sum, use make gazelle generate from that
4. Bump up Python deps a bit

And also whatever was required to actually get things to work - loads of
small useless changes.

Tested to work on NixOS and Ubuntu 20.04:

   $ bazel build //...
   $ bazel test //...

Change-Id: I8364bdaa1406b9ae4d0385a6b607f3e7989f98a9
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1583
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/cluster/identd/BUILD.bazel b/cluster/identd/BUILD.bazel
index c49293f..689b922 100644
--- a/cluster/identd/BUILD.bazel
+++ b/cluster/identd/BUILD.bazel
@@ -2,46 +2,46 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
 
 go_library(
-    name = "go_default_library",
+    name = "identd_lib",
     srcs = ["main.go"],
     importpath = "code.hackerspace.pl/hscloud/cluster/identd",
     visibility = ["//visibility:private"],
     deps = [
-        "//cluster/identd/ident:go_default_library",
-        "//cluster/identd/kubenat:go_default_library",
-        "//go/mirko:go_default_library",
-        "@com_github_golang_glog//:go_default_library",
-        "@io_k8s_apimachinery//pkg/apis/meta/v1:go_default_library",
+        "//cluster/identd/ident",
+        "//cluster/identd/kubenat",
+        "//go/mirko",
+        "@com_github_golang_glog//:glog",
+        "@io_k8s_apimachinery//pkg/apis/meta/v1:meta",
     ],
 )
 
 go_binary(
     name = "identd",
-    embed = [":go_default_library"],
+    embed = [":identd_lib"],
     visibility = ["//visibility:public"],
 )
 
 container_layer(
     name = "layer_bin",
+    directory = "/cluster/identd/",
     files = [
         ":identd",
     ],
-    directory = "/cluster/identd/",
 )
 
 container_image(
     name = "runtime",
     base = "@prodimage-bionic//image",
+    entrypoint = "/cluster/identd/identd",
     layers = [
         ":layer_bin",
     ],
-    entrypoint = "/cluster/identd/identd",
 )
 
 container_push(
     name = "push",
-    image = ":runtime",
     format = "Docker",
+    image = ":runtime",
     registry = "registry.k0.hswaw.net",
     repository = "q3k/identd",
     tag = "{BUILD_TIMESTAMP}-{STABLE_GIT_COMMIT}",
diff --git a/cluster/identd/cri/BUILD.bazel b/cluster/identd/cri/BUILD.bazel
index 68a15aa..1fd00bd 100644
--- a/cluster/identd/cri/BUILD.bazel
+++ b/cluster/identd/cri/BUILD.bazel
@@ -17,7 +17,7 @@
 )
 
 go_library(
-    name = "go_default_library",
+    name = "cri",
     embed = [":cri_go_proto"],
     importpath = "code.hackerspace.pl/hscloud/cluster/identd/cri",
     visibility = ["//visibility:public"],
diff --git a/cluster/identd/ident/BUILD.bazel b/cluster/identd/ident/BUILD.bazel
index 737b814..a1bf063 100644
--- a/cluster/identd/ident/BUILD.bazel
+++ b/cluster/identd/ident/BUILD.bazel
@@ -1,7 +1,7 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
-    name = "go_default_library",
+    name = "ident",
     srcs = [
         "client.go",
         "errors.go",
@@ -11,17 +11,17 @@
     ],
     importpath = "code.hackerspace.pl/hscloud/cluster/identd/ident",
     visibility = ["//visibility:public"],
-    deps = ["@com_github_golang_glog//:go_default_library"],
+    deps = ["@com_github_golang_glog//:glog"],
 )
 
 go_test(
-    name = "go_default_test",
+    name = "ident_test",
     srcs = [
         "e2e_test.go",
         "request_test.go",
         "response_test.go",
         "server_test.go",
     ],
-    embed = [":go_default_library"],
-    deps = ["@com_github_go_test_deep//:go_default_library"],
+    embed = [":ident"],
+    deps = ["@com_github_go_test_deep//:deep"],
 )
diff --git a/cluster/identd/kubenat/BUILD.bazel b/cluster/identd/kubenat/BUILD.bazel
index eeb97ef..02eea63 100644
--- a/cluster/identd/kubenat/BUILD.bazel
+++ b/cluster/identd/kubenat/BUILD.bazel
@@ -1,7 +1,7 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
-    name = "go_default_library",
+    name = "kubenat",
     srcs = [
         "kubenat.go",
         "pods.go",
@@ -10,25 +10,25 @@
     importpath = "code.hackerspace.pl/hscloud/cluster/identd/kubenat",
     visibility = ["//visibility:public"],
     deps = [
-        "//cluster/identd/cri:go_default_library",
-        "@com_github_cenkalti_backoff//:go_default_library",
-        "@com_github_golang_glog//:go_default_library",
+        "//cluster/identd/cri",
+        "@com_github_cenkalti_backoff//:backoff",
+        "@com_github_golang_glog//:glog",
         "@org_golang_google_grpc//:go_default_library",
-        "@org_golang_google_grpc//codes:go_default_library",
-        "@org_golang_google_grpc//status:go_default_library",
+        "@org_golang_google_grpc//codes",
+        "@org_golang_google_grpc//status",
     ],
 )
 
 go_test(
-    name = "go_default_test",
+    name = "kubenat_test",
     srcs = [
         "kubenat_test.go",
         "pods_test.go",
         "translation_test.go",
     ],
-    embed = [":go_default_library"],
+    embed = [":kubenat"],
     deps = [
-        "@com_github_go_test_deep//:go_default_library",
-        "@com_github_golang_glog//:go_default_library",
+        "@com_github_go_test_deep//:deep",
+        "@com_github_golang_glog//:glog",
     ],
 )