db: switch migration source to use in-memory migration

When reading migrations from files, sql-migrate attempts to split
SQL statements. The parsing logic does not handle $BODY$ statements
and broke when the migration included one.

Replace go-bindata with a small migration generation script and use
in memory migrations instead.

db/migrate.go

@@ -53,12 +53,7 @@ func DropMigrationsTable(dbMap *gorp.DbMap) error {
 func migrationSource(dbMap *gorp.DbMap) (src migrate.MigrationSource, dialect string, err error) {
 	switch dbMap.Dialect.(type) {
 	case gorp.PostgresDialect:
-		src = &migrate.AssetMigrationSource{
-			Dir:      migrationDir,
-			Asset:    migrations.Asset,
-			AssetDir: migrations.AssetDir,
-		}
-		return src, "postgres", nil
+		return migrations.PostgresMigrations, "postgres", nil
 	case gorp.SqliteDialect:
 		src = &migrate.MemoryMigrationSource{
 			Migrations: []*migrate.Migration{

db/migrations/gen_assets.go

+// +build ignore
+
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"text/template"
+)
+
+var funcs = template.FuncMap{
+	"quote": strconv.Quote,
+}
+
+var tmpl = template.Must(template.New("assets.go").Delims("{%", "%}").Funcs(funcs).Parse(`package migrations
+
+// THIS FILE WAS GENERATED BY gen.go DO NOT EDIT
+
+import "github.com/rubenv/sql-migrate"
+
+var PostgresMigrations migrate.MigrationSource = &migrate.MemoryMigrationSource{
+	Migrations: []*migrate.Migration{{% range $i, $m := . %}
+		{
+			Id: {% $m.Name | quote %},
+			Up: []string{
+				{% $m.Data | quote %},
+			},
+		},{% end %}
+	},
+}
+`))
+
+// A single postgres migration.
+type migration struct {
+	Name string
+	Data string
+}
+
+func init() {
+	log.SetPrefix("gen_assets: ")
+	log.SetFlags(0)
+}
+
+func main() {
+	files, err := filepath.Glob("*.sql")
+	if err != nil {
+		log.Fatalf("finding sql files: %v", err)
+	}
+
+	sort.Strings(files)
+	migrations := make([]migration, len(files))
+	for i, f := range files {
+		data, err := ioutil.ReadFile(f)
+		if err != nil {
+			log.Fatalf("reading file: %v", err)
+		}
+		migrations[i] = migration{f, string(data)}
+	}
+
+	f, err := os.OpenFile("assets.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		log.Fatalf("creating file: %v", err)
+	}
+	defer f.Close()
+	if err := tmpl.Execute(f, migrations); err != nil {
+		log.Fatal(err)
+	}
+}

db/migrations/migrations.go

 package migrations
 
-// To download go-bindata run `go get -u github.com/jteeuwen/go-bindata/...`
-
-//go:generate go-bindata -modtime=1 -pkg migrations -o assets.go -ignore \.go$ -prefix "../.." ../../db/migrations
-//go:generate gofmt -w assets.go
+//go:generate go run gen_assets.go