[mdatagen]: Use cobra for the command, add version flag

.chloggen/use-cobra-add-version.yaml

@@ -0,0 +1,20 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: 'enhancement'
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: mdatagen
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Use cobra for the command, add version flag
+
+# One or more tracking issues or pull requests related to the change
+issues: [11196]
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

cmd/mdatagen/README.md

@@ -57,7 +57,7 @@ You can run `cd cmd/mdatagen && $(GOCMD) install .` to install the `mdatagen` to
 
 ## Contributing to the Metadata Generator
 
-The code for generating the documentation can be found in [loader.go](./internal/loader.go) and the templates for rendering the documentation can be found in [templates](internal/templates).
+The code for generating the documentation can be found in [loader.go](./internal/loader.go) and the templates for rendering the documentation can be found in [templates](./internal/templates).
 When making updates to the metadata generator or introducing support for new functionality:
 
 1. Ensure the [metadata-schema.yaml](./metadata-schema.yaml) and [metadata.yaml](./metadata.yaml) files reflect the changes.

cmd/mdatagen/go.mod

@@ -4,6 +4,7 @@ go 1.22.0
 
 require (
 	github.com/google/go-cmp v0.6.0
+	github.com/spf13/cobra v1.8.1
 	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/collector/component v0.109.0
 	go.opentelemetry.io/collector/config/configtelemetry v0.109.0
@@ -30,6 +31,7 @@ require (
 	github.com/go-viper/mapstructure/v2 v2.1.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/knadh/koanf/maps v0.1.1 // indirect
 	github.com/knadh/koanf/providers/confmap v0.1.0 // indirect
@@ -39,6 +41,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
 	go.opentelemetry.io/collector/consumer/consumerprofiles v0.109.0 // indirect
 	go.opentelemetry.io/collector/pdata/pprofile v0.109.0 // indirect
 	go.opentelemetry.io/collector/receiver/receiverprofiles v0.109.0 // indirect