output log messages during bootstrap, eg with config file location

cmd/fathom/main.go

@@ -1,9 +1,9 @@
 package main
 
 import (
-	"log"
 	"os"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 	"github.com/usefathom/fathom/pkg/config"
 	"github.com/usefathom/fathom/pkg/datastore"
@@ -72,7 +72,8 @@ func main() {
 }
 
 func before(c *cli.Context) error {
-	app.config = config.Parse(c.String("config"))
+	configFile := c.String("config")
+	app.config = config.Parse(configFile)
 	app.database = datastore.New(app.config.Database)
 	return nil
 }

cmd/fathom/server.go

@@ -31,7 +31,7 @@ func server(c *cli.Context) error {
 	}
 
 	// start listening
-	log.Infof("server will now listening on %s", addr)
+	log.Printf("Fathom is now listening on %s", addr)
 	err := http.ListenAndServe(addr, h)
 	if err != nil {
 		log.Errorln(err)

pkg/config/config.go

@@ -1,12 +1,12 @@
 package config
 
 import (
-	"math/rand"
-
 	"github.com/joho/godotenv"
 	"github.com/kelseyhightower/envconfig"
 	log "github.com/sirupsen/logrus"
 	"github.com/usefathom/fathom/pkg/datastore/sqlstore"
+	"math/rand"
+	"os"
 )
 
 // Config wraps the configuration structs for the various application parts
@@ -21,15 +21,35 @@ func Parse(file string) *Config {
 	var err error
 
 	if file != "" {
-		err = godotenv.Load(file)
-		if err != nil && file != ".env" {
-			log.Fatalf("error parsing config file: %s", err)
+		// get absolute path to config file
+		wd, _ := os.Getwd()
+		absfile := wd + "/" + file
+
+		// check if file exists
+		_, err := os.Stat(absfile)
+		fileNotExists := os.IsNotExist(err)
+
+		// Print config file location
+		if file != ".env" || !fileNotExists {
+			log.Printf("Configuration file: %s", absfile)
+		}
+
+		// Abort if custom config file does not exist
+		if file != ".env" && fileNotExists {
+			log.Fatalf("Error reading configuration. File `%s` does not exist.", file)
+		}
+
+		// read file into env values
+		err = godotenv.Load(absfile)
+		if err != nil {
+			log.Fatalf("Error parsing configuration file: %s", err)
 		}
 	}
 
+	// with config file loaded into env values, we can now parse env into our config struct
 	err = envconfig.Process("Fathom", &cfg)
 	if err != nil {
-		log.Fatalf("error parsing config from environment values: %s", err)
+		log.Fatalf("Error parsing configuration from environment: %s", err)
 	}
 
 	// alias sqlite to sqlite3

pkg/datastore/sqlstore/sqlstore.go

@@ -33,20 +33,28 @@ func New(c *Config) *sqlstore {
 }
 
 func (db *sqlstore) Migrate() {
-	migrations := &migrate.PackrMigrationSource{
+	migrationSource := &migrate.PackrMigrationSource{
 		Box: packr.NewBox("./migrations"),
 		Dir: "./" + db.Config.Driver,
 	}
 	migrate.SetTable("migrations")
 
-	n, err := migrate.Exec(db.DB.DB, db.Config.Driver, migrations, migrate.Up)
-
+	migrations, err := migrationSource.FindMigrations()
 	if err != nil {
-		log.Errorf("database migrations failed: %s", err)
+		log.Errorf("Error loading database migrations: %s", err)
+	}
+
+	if len(migrations) == 0 {
+		log.Fatalf("Missing database migrations")
+	}
+
+	n, err := migrate.Exec(db.DB.DB, db.Config.Driver, migrationSource, migrate.Up)
+	if err != nil {
+		log.Errorf("Error applying database migrations: %s", err)
 	}
 
 	if n > 0 {
-		log.Infof("applied %d database migrations", n)
+		log.Infof("Applied %d database migrations!", n)
 	}
 }