with more generic way, but still wonky

Dockerfile

@@ -8,7 +8,7 @@ RUN go build -o dist/dagger-go main.go
 
 FROM harbor.front.kjuulh.io/docker-proxy/library/docker:dind
 
-WORKDIR /src/docker
+WORKDIR /src
 
-COPY --from=builder /src/builder/dist/dagger-go .
+COPY --from=builder /src/builder/dist/dagger-go /usr/bin/
 

dagger_go_template.yaml

@@ -1,5 +1,3 @@
-{{ $imageTag := "harbor.front.kjuulh.io/library/${DRONE_REPO_NAME}"  }}
-
 type: docker
 kind: pipeline
 name: "drone-dagger-test"
@@ -18,7 +16,7 @@ steps:
       - mkdir -p tmp/dagger-go
       - git clone "https://git.front.kjuulh.io/kjuulh/dagger-go.git" tmp/dagger-go
       - docker build -t dagger-go-builder:${DRONE_COMMIT} -f tmp/dagger-go/Dockerfile .
-      - 'docker run -v /var/run/docker.sock:/var/run/docker.sock dagger-go-builder:${DRONE_COMMIT} ./dagger-go build "{{ or .input.imageTag $imageTag }}"'
+      - 'docker run -v "$PWD/:/src/" -v /var/run/docker.sock:/var/run/docker.sock dagger-go-builder:${DRONE_COMMIT} dagger-go build'
 
 services:
   - name: docker

example/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"git.front.kjuulh.io/kjuulh/dagger-go/internal"
+	"git.front.kjuulh.io/kjuulh/dagger-go/pkg/tasks"
+)
+
+func main() {
+	ctx := context.Background()
+
+	if err := run(ctx); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func run(ctx context.Context) error {
+	builder, err := internal.New(ctx)
+	if err != nil {
+		return err
+	}
+	defer builder.CleanUp()
+
+	return tasks.Build(builder, "some-image", "example/main.go")
+}

go.mod

@@ -8,6 +8,7 @@ require (
 )
 
 require (
+	git.front.kjuulh.io/kjuulh/byg v0.0.1 // indirect
 	github.com/Khan/genqlient v0.5.0 // indirect
 	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/agext/levenshtein v1.2.3 // indirect
@@ -68,7 +69,7 @@ require (
 	go.opentelemetry.io/proto/otlp v0.18.0 // indirect
 	golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa // indirect
 	golang.org/x/net v0.0.0-20220811182439-13a9a731de15 // indirect
-	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect
+	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/time v0.0.0-20220722155302-e5dcc9cfc0b9 // indirect

go.sum

@@ -35,6 +35,8 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 dagger.io/dagger v0.3.1 h1:JjUTPyDSrs+pDPmopVfhYAldHS4Rxn3XechACUlmTHQ=
 dagger.io/dagger v0.3.1/go.mod h1:+p5s9Itrr/KT4UttGNpeUTNtVQUI2z9LDIOH9wBzu8g=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+git.front.kjuulh.io/kjuulh/byg v0.0.1 h1:SBrM5WBv1zTzt29pQMwGUJljGRI7Li7uATnZ3taotC0=
+git.front.kjuulh.io/kjuulh/byg v0.0.1/go.mod h1:8Vg5Mgqzva5fzHGeMlxjp/DMLbUy9uaKFxMNB34yYuA=
 github.com/99designs/gqlgen v0.17.2/go.mod h1:K5fzLKwtph+FFgh9j7nFbRUdBKvTcGnsta51fsMTn3o=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
@@ -506,6 +508,8 @@ golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 h1:uVc8UZUe6tr40fFVnUP5Oj+veunVezqYl9z7DYw9xzw=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

internal/builder.go

@@ -2,13 +2,26 @@ package internal
 
 import (
 	"context"
+	"os"
 
 	"dagger.io/dagger"
 )
 
-func CreateBuilder(ctx context.Context) error {
+type Builder struct {
+	Dagger *dagger.Client
+}
+
+func New(ctx context.Context) (*Builder, error) {
 	client, err := dagger.Connect(ctx, dagger.WithLogOutput(os.Stdout))
 	if err != nil {
-		return err
+		return nil, err
 	}
+
+	return &Builder{
+		Dagger: client,
+	}, nil
+}
+
+func (b *Builder) CleanUp() error {
+	return b.Dagger.Close()
 }

pkg/cli/cli.go

@@ -1,18 +1,17 @@
 package cli
 
 import (
-	"context"
+	"errors"
+	"fmt"
 	"log"
+	"os"
 
+	"git.front.kjuulh.io/kjuulh/dagger-go/internal"
 	"git.front.kjuulh.io/kjuulh/dagger-go/pkg/tasks"
 	"github.com/spf13/cobra"
 )
 
-func Build(requirementsf func(*cobra.Command), buildf func(ctx context.Context) error) *cobra.Command {
-	var (
-		imageTag string
-	)
-
+func Build(mainGoPath string, imageTag string) *cobra.Command {
 	cmd := &cobra.Command{
 		Use: "build",
 		RunE: func(cmd *cobra.Command, args []string) error {
@@ -20,21 +19,27 @@ func Build(requirementsf func(*cobra.Command), buildf func(ctx context.Context)
 				return err
 			}
 
-			if imageTag != "" {
-				log.Printf("Building image: %s\n", imageTag)
+			if imageTag == "" {
+				repoName := os.Getenv("DRONE_REPO_NAME")
+				if repoName == "" {
+					return errors.New("could not find DRONE_REPO_NAME")
+				}
+				imageTag = fmt.Sprintf("harbor.front.kjuulh.io/library/%s", repoName)
 			}
 
-			if buildf != nil {
-				return buildf(cmd.Context())
-			}
+			ctx := cmd.Context()
 
-			return tasks.Build(imageTag)
+			log.Printf("Building image: %s\n", imageTag)
+
+			client, err := internal.New(ctx)
+			if err != nil {
+				return err
+			}
+			defer client.CleanUp()
+
+			return tasks.Build(client, imageTag, mainGoPath)
 		},
 	}
 
-	cmd.PersistentFlags().StringVar(&imageTag, "image-tag", "", "the url for which to tag the docker image, defaults to private url, with repo as image name")
-
-	requirementsf(cmd)
-
 	return cmd
 }

pkg/tasks/build.go

@@ -1,10 +1,44 @@
 package tasks
 
-import "log"
+import (
+	"context"
+	"log"
 
-func Build(imageTag string) error {
+	"dagger.io/dagger"
+	"git.front.kjuulh.io/kjuulh/byg"
+	"git.front.kjuulh.io/kjuulh/dagger-go/internal"
+)
 
+func Build(builder *internal.Builder, imageTag string, buildPath string) error {
 	log.Printf("building image: %s", imageTag)
 
-	return nil
+	client := builder.Dagger
+	ctx := context.Background()
+
+	return byg.
+		New().
+		Step(
+			"build golang",
+			byg.Step{
+				Execute: func(_ byg.Context) error {
+					src, err := client.
+						Host().
+						Workdir().
+						Read().
+						ID(context.Background())
+					if err != nil {
+						return err
+					}
+
+					golang := client.Container().From("golang:latest")
+					golang = golang.WithMountedDirectory("/src", src).WithWorkdir("/src")
+					_, err = golang.Exec(dagger.ContainerExecOpts{
+						Args: []string{"go", "build", "-o", "build/", buildPath},
+					}).ExitCode(ctx)
+
+					return err
+				},
+			}).
+		Execute(context.Background())
+
 }