Use make for docker builds so all releases use the same db and source drivers

Author: dhui

.dockerignore

@@ -2,7 +2,6 @@
 FAQ.md
 README.md
 LICENSE
-Makefile
 .gitignore
 .travis.yml
 CONTRIBUTING.md

Dockerfile

@@ -1,21 +1,19 @@
 FROM golang:1.14-alpine3.12 AS builder
 ARG VERSION
 
-RUN apk add --no-cache git gcc musl-dev
+RUN apk add --no-cache git gcc musl-dev make
 
 WORKDIR /go/src/github.com/golang-migrate/migrate
 
 ENV GO111MODULE=on
-ENV DATABASES="postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver firebird sqlite3 neo4j"
-ENV SOURCES="file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab"
 
 COPY go.mod go.sum ./
 
 RUN go mod download
 
 COPY . ./
 
-RUN go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate
+RUN make build-docker
 
 FROM alpine:3.12
 

Makefile

@@ -9,6 +9,9 @@ COVERAGE_DIR ?= .coverage
 build:
 	CGO_ENABLED=0 go build -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' ./cmd/migrate
 
+build-docker:
+	CGO_ENABLED=0 go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$(DATABASE) $(SOURCE)" ./cmd/migrate
+
 build-cli: clean
 	-mkdir ./cli/build
 	cd ./cmd/migrate && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o ../../cli/build/migrate.linux-amd64 -ldflags='-X main.Version=$(VERSION) -extldflags "-static"' -tags '$(DATABASE) $(SOURCE)' .
@@ -102,10 +105,10 @@ define external_deps
 endef
 
 
-.PHONY: build build-cli clean test-short test test-with-flags html-coverage \
+.PHONY: build build-docker build-cli clean test-short test test-with-flags html-coverage \
         restore-import-paths rewrite-import-paths list-external-deps release \
         docs kill-docs open-docs kill-orphaned-docker-containers
 
-SHELL = /bin/bash
+SHELL = /bin/sh
 RAND = $(shell echo $$RANDOM)