Add official support for firebird back

Dockerfile

@@ -8,7 +8,7 @@ WORKDIR /go/src/github.com/golang-migrate/migrate
 COPY . ./
 
 ENV GO111MODULE=on
-ENV DATABASES="postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver"
+ENV DATABASES="postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver firebird"
 ENV SOURCES="file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab"
 
 RUN go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab
-DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver firebird
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=
 REPO_OWNER ?= $(shell cd .. && basename "$$(pwd)")

README.md

@@ -36,7 +36,7 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
 * [Google Cloud Spanner](database/spanner)
 * [CockroachDB](database/cockroachdb)
 * [ClickHouse](database/clickhouse)
-* [Firebird](database/firebird) ([todo #49](https://github.com/golang-migrate/migrate/issues/49))
+* [Firebird](database/firebird)
 * [MS SQL Server](database/sqlserver)
 
 ### Database URLs

database/firebird/README.md

@@ -10,9 +10,3 @@
 | `role` | | Role name |
 | `tzname` | | Time Zone name. (For Firebird 4.0+) |
 | `wire_crypt` | | Enable wire data encryption or not. For Firebird 3.0+ (default is true) |
-
-## Not officially supported
-
-If you need a `migrate` CLI that supports Firebird, you'll need need to build it yourself. There are also no guarantees that the integration will work since we're not testing with Firebird.
-
-For more info, see: https://github.com/golang-migrate/migrate/issues/49#issuecomment-487193672