doc generation functionality extended (#127)

Co-authored-by: Ron <[email protected]>

provider/docs/doc.go

@@ -3,8 +3,11 @@ package docs
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io/ioutil"
+	"os"
+	"path"
 	"path/filepath"
 	"strings"
 	"text/template"
@@ -13,17 +16,49 @@ import (
 	"github.com/cloudquery/cq-provider-sdk/provider/schema"
 )
 
+const (
+	tablesDir = "tables"
+)
+
 // GenerateDocs creates table documentation for the provider based on it's ResourceMap
-func GenerateDocs(p *provider.Provider, outputPath string) error {
+func GenerateDocs(p *provider.Provider, outputPath string, deleteOld bool) error {
+	if deleteOld {
+		if err := deleteOldFiles(outputPath); err != nil {
+			fmt.Printf("failed to remove old docs: %s", err)
+			return err
+		}
+	}
 	for _, table := range p.ResourceMap {
 		if err := renderAllTables(table, outputPath); err != nil {
-			fmt.Printf("render table error: %s", err)
+			fmt.Printf("render table %s error: %s", table.Name, err)
 			return err
 		}
 	}
 	return nil
 }
 
+// deleteOldFiles removes old files from tables directory, creates tables directory if it does not exist
+func deleteOldFiles(outputPath string) error {
+	tablesPath := path.Join(outputPath, tablesDir)
+	dir, err := ioutil.ReadDir(tablesPath)
+	if err != nil {
+		// create directory if it does not exist
+		if errors.Is(err, os.ErrNotExist) {
+			if err := os.Mkdir(tablesPath, 0644); err != nil {
+				return err
+			}
+			return nil
+		}
+		return fmt.Errorf("Failed to generate docs: %s\n", err)
+	}
+	for _, d := range dir {
+		if err := os.RemoveAll(path.Join([]string{tablesPath, d.Name()}...)); err != nil {
+			return fmt.Errorf("Failed to remove old docs: %s\n", err)
+		}
+	}
+	return nil
+}
+
 func renderAllTables(t *schema.Table, outputPath string) error {
 	if err := renderTable(t, outputPath); err != nil {
 		return err
@@ -53,7 +88,7 @@ func renderTable(table *schema.Table, path string) error {
 	if err := t.Execute(&buf, table); err != nil {
 		return err
 	}
-	return ioutil.WriteFile(filepath.Join(path, "tables", fmt.Sprintf("%s.md", table.Name)), buf.Bytes(), 0644)
+	return ioutil.WriteFile(filepath.Join(path, tablesDir, fmt.Sprintf("%s.md", table.Name)), buf.Bytes(), 0644)
 }
 
 const tableTmpl = `