PT-6909 Extracted spec loading to config and added some tests

.gitignore

@@ -10,12 +10,10 @@ klepto
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 /dist
-debug
-.klepto.toml
+/*.klepto.toml
 coverage.txt
 
 # Vendor stuff
-.glide/
 vendor/
 
 *.coverprofile

cmd/init.go

@@ -27,20 +27,23 @@ func NewInitCmd() *cobra.Command {
 
 // RunInit runs the init command
 func RunInit() error {
-	log.Infof("Initializing %s", configFileName)
+	log.Infof("Initializing %s", config.DefaultConfigFileName)
 
-	_, err := os.Stat(configFileName)
+	_, err := os.Stat(config.DefaultConfigFileName)
 	if !os.IsNotExist(err) {
 		log.Fatal("Config file already exists, refusing to overwrite")
 	}
 
-	f, err := os.Create(configFileName)
+	f, err := os.Create(config.DefaultConfigFileName)
 	if err != nil {
 		return wErrors.Wrap(err, "could not create file")
 	}
 
 	e := toml.NewEncoder(bufio.NewWriter(f))
 	err = e.Encode(config.Spec{
+		Matchers: map[string]string{
+			"ActiveUsers": "users.active = TRUE",
+		},
 		Tables: []*config.Table{
 			{
 				Name: "users",
@@ -54,7 +57,7 @@ func RunInit() error {
 			{
 				Name: "orders",
 				Filter: config.Filter{
-					Match: "users.active = TRUE",
+					Match: "ActiveUsers",
 					Limit: 10,
 				},
 				Relationships: []*config.Relationship{
@@ -75,7 +78,7 @@ func RunInit() error {
 		return wErrors.Wrap(err, "could not encode config")
 	}
 
-	log.Infof("Created %s!", configFileName)
+	log.Infof("Created %s!", config.DefaultConfigFileName)
 
 	return nil
 }

cmd/root.go

@@ -3,19 +3,14 @@ package cmd
 import (
 	"os"
 
-	"github.com/hellofresh/klepto/pkg/config"
-	"github.com/hellofresh/klepto/pkg/formatter"
-	wErrors "github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
-	"github.com/spf13/viper"
+
+	"github.com/hellofresh/klepto/pkg/formatter"
 )
 
 var (
-	globalConfig   *config.Spec
-	configFile     string
-	configFileName = ".klepto.toml"
-	verbose        bool
+	verbose bool
 
 	// RootCmd steals and anonymises databases
 	RootCmd = &cobra.Command{
@@ -32,48 +27,18 @@ var (
 )
 
 func init() {
-	RootCmd.PersistentFlags().StringVarP(&configFile, "config", "c", "", "Path to config file (default is ./.klepto)")
 	RootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "Make the operation more talkative")
+	RootCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {
+		if verbose {
+			log.SetLevel(log.DebugLevel)
+		}
+	}
 
-	RootCmd.AddCommand(NewStealCmd())
 	RootCmd.AddCommand(NewVersionCmd())
 	RootCmd.AddCommand(NewUpdateCmd())
 	RootCmd.AddCommand(NewInitCmd())
+	RootCmd.AddCommand(NewStealCmd())
 
 	log.SetOutput(os.Stderr)
 	log.SetFormatter(&formatter.CliFormatter{})
 }
-
-func initConfig(c *cobra.Command, args []string) error {
-	if verbose {
-		log.SetLevel(log.DebugLevel)
-	}
-
-	log.Debugf("Reading config from %s...", configFileName)
-
-	if configFile != "" {
-		// Use config file from the flag.
-		viper.SetConfigFile(configFile)
-	} else {
-		cwd, err := os.Getwd()
-		if err != nil {
-			return wErrors.Wrap(err, "can't find current working directory")
-		}
-
-		viper.SetConfigName(".klepto")
-		viper.AddConfigPath(cwd)
-		viper.AddConfigPath(".")
-	}
-
-	err := viper.ReadInConfig()
-	if err != nil {
-		return wErrors.Wrap(err, "could not read configurations")
-	}
-
-	err = viper.Unmarshal(&globalConfig)
-	if err != nil {
-		return wErrors.Wrap(err, "could not unmarshal config file")
-	}
-
-	return nil
-}

cmd/steal.go

@@ -4,13 +4,15 @@ import (
 	"runtime"
 	"time"
 
-	"github.com/hellofresh/klepto/pkg/anonymiser"
-	"github.com/hellofresh/klepto/pkg/dumper"
-	"github.com/hellofresh/klepto/pkg/reader"
 	wErrors "github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 
+	"github.com/hellofresh/klepto/pkg/anonymiser"
+	"github.com/hellofresh/klepto/pkg/config"
+	"github.com/hellofresh/klepto/pkg/dumper"
+	"github.com/hellofresh/klepto/pkg/reader"
+
 	// imports dumpers and readers
 	_ "github.com/hellofresh/klepto/pkg/dumper/mysql"
 	_ "github.com/hellofresh/klepto/pkg/dumper/postgres"
@@ -22,15 +24,18 @@ import (
 type (
 	// StealOptions represents the command options
 	StealOptions struct {
+		configPath string
+		cfgSpec    *config.Spec
+
 		from        string
 		to          string
 		concurrency int
 		readOpts    connOpts
 		writeOpts   connOpts
 	}
 	connOpts struct {
-		timeout         string
-		maxConnLifetime string
+		timeout         time.Duration
+		maxConnLifetime time.Duration
 		maxConns        int
 		maxIdleConns    int
 	}
@@ -40,81 +45,81 @@ type (
 func NewStealCmd() *cobra.Command {
 	opts := new(StealOptions)
 	cmd := &cobra.Command{
-		Use:     "steal",
-		Short:   "Steals and anonymises databases",
-		PreRunE: initConfig,
+		Use:   "steal",
+		Short: "Steals and anonymises databases",
+		PreRunE: func(cmd *cobra.Command, args []string) error {
+			var err error
+			opts.cfgSpec, err = config.LoadSpecFromFile(opts.configPath)
+			if err != nil {
+				return err
+			}
+
+			return nil
+		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			return RunSteal(opts)
 		},
 	}
 
-	cmd.PersistentFlags().StringVarP(&opts.from, "from", "f", "root:root@tcp(localhost:3306)/klepto", "Database dsn to steal from")
-	cmd.PersistentFlags().StringVarP(&opts.to, "to", "t", "os://stdout/", "Database to output to (default writes to stdOut)")
-	cmd.PersistentFlags().IntVar(&opts.concurrency, "concurrency", runtime.NumCPU(), "Sets the amount of dumps to be performed concurrently")
-	cmd.PersistentFlags().StringVar(&opts.readOpts.timeout, "read-timeout", "5m", "Sets the timeout for read operations")
-	cmd.PersistentFlags().StringVar(&opts.writeOpts.timeout, "write-timeout", "30s", "Sets the timeout for write operations")
-	cmd.PersistentFlags().StringVar(&opts.readOpts.maxConnLifetime, "read-conn-lifetime", "0", "Sets the maximum amount of time a connection may be reused on the read database")
-	cmd.PersistentFlags().IntVar(&opts.readOpts.maxConns, "read-max-conns", 5, "Sets the maximum number of open connections to the read database")
-	cmd.PersistentFlags().IntVar(&opts.readOpts.maxIdleConns, "read-max-idle-conns", 0, "Sets the maximum number of connections in the idle connection pool for the read database")
-	cmd.PersistentFlags().StringVar(&opts.writeOpts.maxConnLifetime, "write-conn-lifetime", "0", "Sets the maximum amount of time a connection may be reused on the write database")
-	cmd.PersistentFlags().IntVar(&opts.writeOpts.maxConns, "write-max-conns", 5, "Sets the maximum number of open connections to the write database")
-	cmd.PersistentFlags().IntVar(&opts.writeOpts.maxIdleConns, "write-max-idle-conns", 0, "Sets the maximum number of connections in the idle connection pool for the write database")
+	persistentFlags := cmd.PersistentFlags()
+	persistentFlags.StringVarP(&opts.configPath, "config", "c", config.DefaultConfigFileName, "Path to config file")
+	persistentFlags.StringVarP(&opts.from, "from", "f", "mysql://root:root@tcp(localhost:3306)/klepto", "Database dsn to steal from")
+	persistentFlags.StringVarP(&opts.to, "to", "t", "os://stdout/", "Database to output to (default writes to stdOut)")
+	persistentFlags.IntVar(&opts.concurrency, "concurrency", runtime.NumCPU(), "Sets the amount of dumps to be performed concurrently")
+	persistentFlags.DurationVar(&opts.readOpts.timeout, "read-timeout", 5*time.Minute, "Sets the timeout for read operations")
+	persistentFlags.DurationVar(&opts.readOpts.maxConnLifetime, "read-conn-lifetime", 0, "Sets the maximum amount of time a connection may be reused on the read database")
+	persistentFlags.IntVar(&opts.readOpts.maxConns, "read-max-conns", 5, "Sets the maximum number of open connections to the read database")
+	persistentFlags.IntVar(&opts.readOpts.maxIdleConns, "read-max-idle-conns", 0, "Sets the maximum number of connections in the idle connection pool for the read database")
+	persistentFlags.DurationVar(&opts.writeOpts.timeout, "write-timeout", 30*time.Second, "Sets the timeout for write operations")
+	persistentFlags.DurationVar(&opts.writeOpts.maxConnLifetime, "write-conn-lifetime", 0, "Sets the maximum amount of time a connection may be reused on the write database")
+	persistentFlags.IntVar(&opts.writeOpts.maxConns, "write-max-conns", 5, "Sets the maximum number of open connections to the write database")
+	persistentFlags.IntVar(&opts.writeOpts.maxIdleConns, "write-max-idle-conns", 0, "Sets the maximum number of connections in the idle connection pool for the write database")
+
 	return cmd
 }
 
 // RunSteal is the handler for the rootCmd.
 func RunSteal(opts *StealOptions) (err error) {
-	readTimeout, err := time.ParseDuration(opts.readOpts.timeout)
-	if err != nil {
-		return wErrors.Wrap(err, "Failed to parse read timeout duration")
-	}
-
-	writeTimeout, err := time.ParseDuration(opts.readOpts.timeout)
-	if err != nil {
-		return wErrors.Wrap(err, "Failed to parse write timeout duration")
-	}
-
-	readMaxConnLifetime, err := time.ParseDuration(opts.readOpts.maxConnLifetime)
-	if err != nil {
-		return wErrors.Wrap(err, "Failed to parse write timeout duration")
-	}
-
-	writeMaxConnLifetime, err := time.ParseDuration(opts.writeOpts.maxConnLifetime)
-	if err != nil {
-		return wErrors.Wrap(err, "Failed to parse the timeout duration")
-	}
-
 	source, err := reader.Connect(reader.ConnOpts{
 		DSN:             opts.from,
-		Timeout:         readTimeout,
-		MaxConnLifetime: readMaxConnLifetime,
+		Timeout:         opts.readOpts.timeout,
+		MaxConnLifetime: opts.readOpts.maxConnLifetime,
 		MaxConns:        opts.readOpts.maxConns,
 		MaxIdleConns:    opts.readOpts.maxIdleConns,
 	})
 	if err != nil {
 		return wErrors.Wrap(err, "Could not connecting to reader")
 	}
-	defer source.Close()
+	defer func() {
+		if err := source.Close(); err != nil {
+			log.WithError(err).Error("Something is not ok with closing source connection")
+		}
+	}()
 
-	source = anonymiser.NewAnonymiser(source, globalConfig.Tables)
+	source = anonymiser.NewAnonymiser(source, opts.cfgSpec.Tables)
 	target, err := dumper.NewDumper(dumper.ConnOpts{
 		DSN:             opts.to,
-		Timeout:         writeTimeout,
-		MaxConnLifetime: writeMaxConnLifetime,
+		Timeout:         opts.writeOpts.timeout,
+		MaxConnLifetime: opts.writeOpts.maxConnLifetime,
 		MaxConns:        opts.writeOpts.maxConns,
 		MaxIdleConns:    opts.writeOpts.maxIdleConns,
 	}, source)
 	if err != nil {
 		return wErrors.Wrap(err, "Error creating dumper")
 	}
-	defer target.Close()
+	defer func() {
+		if err := target.Close(); err != nil {
+			log.WithError(err).Error("Something is not ok with closing target connection")
+		}
+	}()
 
 	log.Info("Stealing...")
 
 	done := make(chan struct{})
 	defer close(done)
+
 	start := time.Now()
-	if err := target.Dump(done, globalConfig, opts.concurrency); err != nil {
+	if err := target.Dump(done, opts.cfgSpec, opts.concurrency); err != nil {
 		return wErrors.Wrap(err, "Error while dumping")
 	}
 

fixtures/.klepto.toml

@@ -0,0 +1,34 @@
+[Matchers]
+  ActiveUsers = "users.active = TRUE"
+
+[[Tables]]
+  Name = "users"
+  IgnoreData = false
+  [Tables.Filter]
+    Match = "users.active = TRUE"
+    Limit = 100
+    [Tables.Filter.Sorts]
+      "user.id" = "asc"
+  [Tables.Anonymise]
+    email = "EmailAddress"
+    firstName = "FirstName"
+
+[[Tables]]
+  Name = "orders"
+  IgnoreData = false
+  [Tables.Filter]
+    Match = "ActiveUsers"
+    Limit = 10
+
+  [[Tables.Relationships]]
+    Table = ""
+    ForeignKey = "user_id"
+    ReferencedTable = "users"
+    ReferencedKey = "id"
+
+[[Tables]]
+  Name = "logs"
+  IgnoreData = true
+  [Tables.Filter]
+    Match = ""
+    Limit = 0

pkg/anonymiser/anonymiser.go

@@ -38,9 +38,9 @@ func NewAnonymiser(source reader.Reader, tables config.Tables) reader.Reader {
 func (a *anonymiser) ReadTable(tableName string, rowChan chan<- database.Row, opts reader.ReadTableOpt, matchers config.Matchers) error {
 	logger := log.WithField("table", tableName)
 	logger.Debug("Loading anonymiser config")
-	table, err := a.tables.FindByName(tableName)
-	if err != nil {
-		logger.WithError(err).Debug("the table is not configured to be anonymised")
+	table := a.tables.FindByName(tableName)
+	if table == nil {
+		logger.Debug("the table is not configured to be anonymised")
 		return a.Reader.ReadTable(tableName, rowChan, opts, matchers)
 	}