Adds build/commands package to expose which commands should be

registered. Gates the completion command which is disabled by defualt.
Can be configured at build time.

Signed-off-by: joshvanl <vleeuwenjoshua@gmail.com>

cmd/ctl/pkg/build/commands/BUILD.bazel

@@ -0,0 +1,37 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["commands.go"],
+    importpath = "github.com/jetstack/cert-manager/cmd/ctl/pkg/build/commands",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//cmd/ctl/pkg/approve:go_default_library",
+        "//cmd/ctl/pkg/check:go_default_library",
+        "//cmd/ctl/pkg/completion:go_default_library",
+        "//cmd/ctl/pkg/convert:go_default_library",
+        "//cmd/ctl/pkg/create:go_default_library",
+        "//cmd/ctl/pkg/deny:go_default_library",
+        "//cmd/ctl/pkg/experimental:go_default_library",
+        "//cmd/ctl/pkg/inspect:go_default_library",
+        "//cmd/ctl/pkg/renew:go_default_library",
+        "//cmd/ctl/pkg/status:go_default_library",
+        "//cmd/ctl/pkg/version:go_default_library",
+        "@com_github_spf13_cobra//:go_default_library",
+        "@io_k8s_cli_runtime//pkg/genericclioptions:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

cmd/ctl/pkg/build/commands/commands.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2020 The cert-manager Authors.
+
+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.
+*/
+
+package commands
+
+import (
+	"context"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/approve"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/check"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/completion"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/convert"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/create"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/deny"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/experimental"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/inspect"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/renew"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/status"
+	"github.com/jetstack/cert-manager/cmd/ctl/pkg/version"
+)
+
+// registerCompletion gates whether the completion command is registered.
+// Specifically useful when building the CLI as a kubectl plugin which does not
+// support completion.
+var registerCompletion = "false"
+
+type RegisterCommandFunc func(context.Context, genericclioptions.IOStreams) *cobra.Command
+
+// Commands returns the cobra Commands that should be registered for the CLI
+// build.
+func Commands() []RegisterCommandFunc {
+	cmds := []RegisterCommandFunc{
+		version.NewCmdVersion,
+		convert.NewCmdConvert,
+		create.NewCmdCreate,
+		renew.NewCmdRenew,
+		status.NewCmdStatus,
+		inspect.NewCmdInspect,
+		approve.NewCmdApprove,
+		deny.NewCmdDeny,
+		check.NewCmdCheck,
+
+		// Experimental features
+		experimental.NewCmdExperimental,
+	}
+
+	if strings.ToLower(registerCompletion) == "true" {
+		cmds = append(cmds, completion.NewCmdCompletion)
+	}
+
+	return cmds
+}