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migrate_mkpy.go
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/
migrate_mkpy.go
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// Copyright (c) 2021 Terminus, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"bytes"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/erda-project/erda/pkg/database/sqlparser/migrator"
"github.com/erda-project/erda/pkg/database/sqlparser/pygrator"
"github.com/erda-project/erda/tools/cli/command"
)
var MigratePy = command.Command{
ParentName: "Migrate",
Name: "mkpy",
ShortHelp: "make a python migration script pattern",
LongHelp: "make a python migration scritp pattern.",
Example: "erda-cli migrate mkpy --module my_module --name my_script_name",
Hidden: false,
DontHideCursor: false,
Args: nil,
Flags: []command.Flag{
command.StringFlag{
Short: "",
Name: "workdir",
Doc: "workdir",
DefaultValue: ".",
},
command.StringFlag{
Short: "m",
Name: "module",
Doc: "migration module name",
DefaultValue: "",
},
command.StringFlag{
Short: "n",
Name: "name",
Doc: "script name",
DefaultValue: "",
},
command.StringListFlag{
Short: "",
Name: "tables",
Doc: "dependency tables",
DefaultValue: nil,
},
},
Run: RunMigrateMkPy,
}
func RunMigrateMkPy(ctx *command.Context, workdir, module, name string, tables []string) error {
moduleInfos, err := ioutil.ReadDir(workdir)
if err != nil {
return err
}
var (
m migrator.Module
validModule = false
requirementsExists bool
)
for _, moduleInfo := range moduleInfos {
if !moduleInfo.IsDir() {
continue
}
if moduleInfo.Name() == module {
validModule = true
}
fileInfos, err := ioutil.ReadDir(moduleInfo.Name())
if err != nil {
return errors.Wrap(err, "failed to ReadDir, directory name: %s")
}
for _, fileInfo := range fileInfos {
if fileInfo.IsDir() {
continue
}
// is there already exists requirements.txt
if moduleInfo.Name() == module && fileInfo.Name() == pygrator.RequirementsFilename {
requirementsExists = true
}
if ext := filepath.Ext(fileInfo.Name()); strings.EqualFold(ext, string(migrator.ScriptTypeSQL)) {
script, err := migrator.NewScript(workdir, filepath.Join(workdir, moduleInfo.Name(), fileInfo.Name()))
if err != nil {
return errors.Wrapf(err, "failed to NewScript")
}
m.Scripts = append(m.Scripts, script)
}
}
}
if !validModule {
return errors.Errorf("invalid module name: %s", module)
}
if !requirementsExists {
if err = ioutil.WriteFile(filepath.Join(workdir, module, pygrator.RequirementsFilename),
[]byte(pygrator.BaseRequirements), 0644); err != nil {
return errors.Wrap(err, "failed to generate requirements.txt")
}
}
m.Sort()
// transform table definitions to django models
var (
schema = m.Schema()
script pygrator.DeveloperScript
tablesM = make(map[string]bool)
)
for _, tableName := range tables {
tablesM[tableName] = true
}
for _, definition := range schema.TableDefinitions {
// if user specifies the tables, skip the table which is not in the tables
if definition.CreateStmt == nil {
continue
}
if _, ok := tablesM[definition.CreateStmt.Table.Name.String()]; !ok {
continue
}
// make table definition to Django Model
model, err := pygrator.CreateTableStmtToModel(definition.CreateStmt)
if err != nil {
return errors.Wrapf(err, "failed to CreateTableStmtToModel")
}
var buf = bytes.NewBuffer(nil)
if err = pygrator.GenModel(buf, *model); err != nil {
return errors.Wrapf(err, "failed to GenModel")
}
script.Models = append(script.Models, buf.String())
}
// write developer's python pattern script
name = strings.TrimSuffix(name, filepath.Ext(name)) + string(migrator.ScriptTypePython)
var filename = filepath.Join(workdir, module, name)
f, err := os.OpenFile(filename, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0644)
if err != nil {
return errors.Wrapf(err, "failed to OpenFile: %s", filename)
}
defer f.Close()
if err = pygrator.GenDeveloperScript(f, script); err != nil {
return err
}
return nil
}