tools: regenerate scripts skips dirs that contains diff exec command (#1987)

Author: mcdoker18

scripts/regenerate/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"os"
@@ -9,6 +10,27 @@ import (
 	"strings"
 )
 
+func parseExecCommand(path string) (string, error) {
+	var exec = struct {
+		Command string `json:"command"`
+	}{
+		Command: "generate",
+	}
+
+	execJsonPath := filepath.Join(path, "exec.json")
+	if _, err := os.Stat(execJsonPath); !os.IsNotExist(err) {
+		blob, err := os.ReadFile(execJsonPath)
+		if err != nil {
+			return "", err
+		}
+		if err := json.Unmarshal(blob, &exec); err != nil {
+			return "", err
+		}
+	}
+
+	return exec.Command, nil
+}
+
 func regenerate(dir string) error {
 	return filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -19,6 +41,15 @@ func regenerate(dir string) error {
 		}
 		if strings.HasSuffix(path, "sqlc.json") || strings.HasSuffix(path, "sqlc.yaml") {
 			cwd := filepath.Dir(path)
+			command, err := parseExecCommand(cwd)
+			if err != nil {
+				return fmt.Errorf("failed to parse exec.json: %w", err)
+			}
+
+			if command != "generate" {
+				return nil
+			}
+
 			cmd := exec.Command("sqlc-dev", "generate", "--experimental")
 			cmd.Dir = cwd
 			out, failed := cmd.CombinedOutput()