Support atmos docs generate feature natively

atmos.yaml

@@ -389,6 +389,26 @@ settings:
       color: "${colors.muted}"
       italic: true
 
+
+  docs:
+    generate:
+      input:
+        - "./README.yaml"
+      # To Do: template can be a remote URL/github, using this local for testing
+      template:  "https://raw.githubusercontent.com/cloudposse/.github/5a599e3b929f871f333cb9681a721d26b237d8de/README.md.gotmpl"
+      # The final README
+      output: "README.md"
+      terraform:
+        enabled: true
+        format: "markdown"
+        show_providers: false
+        show_inputs: true
+        show_outputs: true
+        sort_by: "name"
+        hide_empty: false
+        indent_level: 2  
+
+
 version:
   check:
     enabled: true

cmd/docs_generate.go

@@ -0,0 +1,41 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+
+	e "github.com/cloudposse/atmos/internal/exec"
+)
+
+// docsGenerateCmd generates README.md
+var docsGenerateCmd = &cobra.Command{
+	Use:     "generate [path]",
+	Aliases: []string{"docs"},
+	Short:   "Generate docs (README.md) from README.yaml data and templates",
+	Long: `Generate documentation by merging multiple README.yaml data sources
+and then using templates to produce README.md files. Also supports terraform-docs injection.`,
+	Example: `Generate a README.md in the current path:
+atmos docs generate
+
+Generate a README.md for the VPC component:
+atmos docs generate components/terraform/vpc
+
+Generate all README.md (recursively searches for README.yaml to rebuild docs):
+atmos docs generate --all`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return e.ExecuteDocsGenerateCmd(cmd, args)
+	},
+}
+
+// generateDocsCmd is a new top-level command so we can do `atmos generate docs`.
+var generateDocsCmd = &cobra.Command{
+	Use:   "generate",
+	Short: "Generic generation commands (e.g. docs, scaffolding, etc.)",
+	Long:  `A collection of subcommands for generating artifacts such as documentation or code.`,
+}
+
+func init() {
+	docsGenerateCmd.Flags().Bool("all", false, "Recursively rebuild README.md files from any discovered README.yaml")
+	docsCmd.AddCommand(docsGenerateCmd)
+	RootCmd.AddCommand(generateDocsCmd)
+	generateDocsCmd.AddCommand(docsGenerateCmd)
+}