fix gitignore

.gitignore

@@ -13,12 +13,10 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
-schema.yaml
-goerd
-schema.puml
-schema copy.yaml
-sql/test_ddl_full.sql
-schema/yaml_test.go
-schema2.puml
-schema2.yaml
+
+/goerd
+/cmd/goerd/goerd
+/main
+/sql/test_ddl_full.sql
+/schema/yaml_test.go
 .vscode/launch.json

cmd/goerd/main.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/covrom/goerd/datasource"
+	"github.com/covrom/goerd/schema"
+	_ "github.com/jackc/pgx/v4/stdlib"
+)
+
+var (
+	dsn     = flag.String("dsn", "", "Build a DSN e.g. postgres://username:password@url:port/dbName")
+	inyml   = flag.String("iy", "", "input yaml filename")
+	yml     = flag.String("oy", "schema.yaml", "output yaml filename")
+	pml     = flag.String("op", "schema.puml", "output plant uml filename")
+	dist    = flag.Int("opdist", 2, "distance for plant uml")
+	fromyml = flag.String("from", "", "source schema yaml filename")
+	toyml   = flag.String("to", "", "destination schema yaml filename")
+)
+
+func main() {
+	flag.Parse()
+	if (*dsn == "" && *inyml == "" && *fromyml == "" && *toyml == "") ||
+		(*yml == "" && *pml == "" && *fromyml == "" && *toyml == "") {
+		flag.Usage()
+		return
+	}
+
+	s := &schema.Schema{}
+
+	if *dsn != "" {
+		var err error
+		s, err = datasource.Analyze(*dsn)
+		if err != nil {
+			log.Fatal(err)
+		}
+	} else if *inyml != "" {
+		f, err := os.Open(*inyml)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if err := s.LoadYaml(f); err != nil {
+			f.Close()
+			log.Fatal(err)
+		}
+		f.Close()
+	}
+
+	if *yml != "" {
+		wr, err := os.OpenFile(*yml, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		if err := s.SaveYaml(wr); err != nil {
+			wr.Close()
+			log.Fatal(err)
+		}
+		wr.Close()
+	}
+
+	if *pml != "" {
+		wr, err := os.OpenFile(*pml, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		if err := s.SavePlantUml(wr, *dist); err != nil {
+			wr.Close()
+			log.Fatal(err)
+		}
+		wr.Close()
+	}
+
+	if *fromyml != "" || *toyml != "" {
+		sfrom := &schema.Schema{}
+		if *fromyml != "" {
+			ffrom, err := os.Open(*fromyml)
+			if err != nil {
+				log.Fatal(err)
+			}
+			if err := sfrom.LoadYaml(ffrom); err != nil {
+				ffrom.Close()
+				log.Fatal(err)
+			}
+			ffrom.Close()
+		}
+		sto := &schema.Schema{}
+		if *toyml != "" {
+			fto, err := os.Open(*toyml)
+			if err != nil {
+				log.Fatal(err)
+			}
+			if err := sto.LoadYaml(fto); err != nil {
+				fto.Close()
+				log.Fatal(err)
+			}
+			fto.Close()
+		}
+
+		ptch := &schema.PatchSchema{CurrentSchema: sfrom.CurrentSchema}
+		ptch.Build(sfrom, sto)
+		qs := ptch.GenerateSQL()
+		for _, q := range qs {
+			fmt.Println(q)
+		}
+	}
+}

output/schema.yaml

@@ -0,0 +1,36 @@
+name: ""
+schema: public
+tables:
+  accounts:
+    type: TABLE
+    columns:
+      created_on:
+        type: timestamp without time zone
+      email:
+        type: varchar(255)
+      last_login:
+        type: timestamp without time zone
+        nullable: true
+      parent_id:
+        type: integer
+        nullable: true
+      password:
+        type: varchar(50)
+      user_id:
+        type: integer
+        pk: true
+        default: nextval('accounts_user_id_seq'::regclass)
+      username:
+        type: varchar(50)
+    constraints:
+      accounts_email_key:
+        type: UNIQUE
+        columns: [email]
+      accounts_username_key:
+        type: UNIQUE
+        columns: [username]
+    relations:
+      accounts:
+        columns: [parent_id]
+        parentColumns: [user_id]
+        onDelete: CASCADE