Overhaul with multiplatform build, nicer API, and embedded KO build (#9)

* A rework of the library structure
* Project builds and passes golangci-lint
* Binary builds are working
* In fact build for various platforms.
* Tweaking the output
* KO build works, tests as well
* Basic KO publisher
* Publishing works
* LDflags for images works
* Minor UI fixes
* Remove changes for ko-build/ko#476

.github/workflows/lints.yml

@@ -16,7 +16,7 @@ jobs:
         uses: golangci/golangci-lint-action@v2
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.35.2
+          version: latest
   editorconfig:
     name: EditorConfig
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -15,7 +15,8 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - '1.15'
+          - '1.16'
+          - '1.17'
     steps:
 
     - name: Set up Go ${{ matrix.go-version }}

.golangci.yml

@@ -1,57 +1,44 @@
 run:
   timeout: 5m
+  build-tags:
+    - e2e
+    - mage
 
 linters:
   disable-all: false
   presets:
     - bugs
     - unused
+    - complexity
+    - format
+    - performance
+    - style
   enable:
-    - bodyclose
-    - deadcode
-    - depguard
-    - dogsled
-    - dupl
-    - errcheck
-    - exhaustive
-    - funlen
-    - goconst
-    - gocritic
-    - gocyclo
-    - gofmt
-    - goimports
-    - golint
-    - gomnd
-    - goprintffuncname
-    - gosec
-    - gosimple
-    - govet
-    - ineffassign
-    - interfacer
-    - lll
-    - misspell
-    - nakedret
-    - noctx
-    - nolintlint
-    - rowserrcheck
-    - scopelint
-    - staticcheck
-    - structcheck
-    - stylecheck
-    - typecheck
-    - unconvert
-    - unparam
-    - unused
-    - varcheck
-    - asciicheck
-    - gocognit
-    - godot
-    - godox
-    - goerr113
-    - maligned
-    - nestif
-    - prealloc
-    - testpackage
+    - gci
   disable:
-    - whitespace
+    - paralleltest
+    - nlreturn
+    - exhaustivestruct
     - wsl
+    - godox
+    - scopelint
+    - maligned
+    - interfacer
+    - golint
+    - deadcode
+    - gochecknoglobals
+    - wrapcheck
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - wrapcheck
+
+
+linters-settings:
+  gomoddirectives:
+    # List of allowed `replace` directives. Default is empty.
+    replace-allow-list:
+        # FIXME: remove after https://github.com/google/ko/issues/476
+      - github.com/google/ko

build.go

@@ -0,0 +1,52 @@
+package magetasks
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/magefile/mage/mg"
+	"github.com/wavesoftware/go-magetasks/config"
+	"github.com/wavesoftware/go-magetasks/pkg/artifact"
+	"github.com/wavesoftware/go-magetasks/pkg/files"
+	"github.com/wavesoftware/go-magetasks/pkg/tasks"
+)
+
+// ErrNoBuilderForArtifact when no builder for artifact is found.
+var ErrNoBuilderForArtifact = errors.New("no builder for artifact found")
+
+// Build will build project artifacts, binaries and images.
+func Build() {
+	mg.Deps(Test, files.EnsureBuildDir)
+	t := tasks.Start("🔨", "Building", len(config.Actual().Artifacts) > 0)
+	for _, art := range config.Actual().Artifacts {
+		p := t.Part(fmt.Sprintf("%s %s", art.GetType(), art.GetName()))
+		pp := p.Starting()
+
+		buildArtifact(art, pp)
+	}
+	t.End()
+}
+
+func buildArtifact(art config.Artifact, pp tasks.PartProcessing) {
+	found := false
+	for _, builder := range config.Actual().Builders {
+		if !builder.Accepts(art) {
+			continue
+		}
+		found = true
+		result := builder.Build(art, pp)
+		if result.Failed() {
+			pp.Done(result.Error)
+			return
+		}
+		config.WithContext(func(ctx context.Context) context.Context {
+			return context.WithValue(ctx, artifact.BuildKey(art), result)
+		})
+	}
+	var err error
+	if !found {
+		err = ErrNoBuilderForArtifact
+	}
+	pp.Done(err)
+}

checks.go

@@ -3,18 +3,18 @@ package magetasks
 import (
 	"github.com/magefile/mage/mg"
 	"github.com/wavesoftware/go-magetasks/config"
-	"github.com/wavesoftware/go-magetasks/internal"
+	"github.com/wavesoftware/go-magetasks/pkg/deps"
 	"github.com/wavesoftware/go-magetasks/pkg/tasks"
 )
 
 // Check will run all lints checks.
 func Check() {
-	mg.Deps(internal.BuildDeps)
-	t := tasks.StartMultiline("🔍", "Checking")
-	for _, check := range config.Checks {
+	mg.Deps(deps.Install)
+	t := tasks.Start("🔍", "Checking", len(config.Actual().Checks) > 0)
+	for _, check := range config.Actual().Checks {
 		p := t.Part(check.Name)
-		ps := p.Starting()
-		ps.Done(check.Task())
+		pp := p.Starting()
+		pp.Done(check.Operation(pp))
 	}
 	t.End(nil)
 }

cleaning.go

@@ -4,19 +4,20 @@ import (
 	"os"
 
 	"github.com/wavesoftware/go-magetasks/config"
-	"github.com/wavesoftware/go-magetasks/internal"
+	"github.com/wavesoftware/go-magetasks/pkg/files"
 	"github.com/wavesoftware/go-magetasks/pkg/tasks"
 )
 
 // Clean will clean project files.
 func Clean() {
-	t := tasks.Start("🚿", "Cleaning")
-	err := os.RemoveAll(internal.BuildDir())
+	t := tasks.Start("🚿", "Cleaning", len(config.Actual().Cleaning) > 0)
+	err := os.RemoveAll(files.BuildDir())
 	errs := make([]error, 0, 1)
 	errs = append(errs, err)
-	for _, task := range config.CleaningTasks {
+	for _, task := range config.Actual().Cleaning {
 		p := t.Part(task.Name)
-		p.Starting().Done(task.Task())
+		pp := p.Starting()
+		pp.Done(task.Operation(pp))
 	}
 	t.End(errs...)
 }

config/defaults.go

@@ -0,0 +1,44 @@
+package config
+
+import (
+	"context"
+
+	"github.com/fatih/color"
+)
+
+var (
+	// DefaultBuilders is a list of default builders.
+	DefaultBuilders = make([]Builder, 0)
+	// DefaultPublishers is a list of default publishers.
+	DefaultPublishers = make([]Publisher, 0)
+)
+
+// FillInDefaultValues in provided config and returns a filled one.
+func FillInDefaultValues(cfg Config) Config {
+	if len(cfg.BuildDirPath) == 0 {
+		cfg.BuildDirPath = []string{"build", "_output"}
+	}
+	empty := &MageTag{}
+	if cfg.MageTag == *empty {
+		cfg.MageTag = MageTag{
+			Color: color.FgCyan,
+			Label: "[MAGE]",
+		}
+	}
+	if cfg.Dependencies == nil {
+		cfg.Dependencies = NewDependencies("github.com/kyoh86/richgo")
+	}
+	if cfg.Context == nil {
+		cfg.Context = context.TODO()
+	}
+	if cfg.Artifacts == nil {
+		cfg.Artifacts = make([]Artifact, 0)
+	}
+	if len(cfg.Builders) == 0 {
+		cfg.Builders = append(cfg.Builders, DefaultBuilders...)
+	}
+	if len(cfg.Publishers) == 0 {
+		cfg.Publishers = append(cfg.Publishers, DefaultPublishers...)
+	}
+	return cfg
+}

config/deps.go

@@ -0,0 +1,45 @@
+package config
+
+type Dependencies interface {
+	Configurator
+	Installs() []string
+	merge(other Dependencies)
+}
+
+func NewDependencies(deps ...string) Dependencies {
+	s := make(map[string]bool, len(deps))
+	for _, dep := range deps {
+		s[dep] = exists
+	}
+	return dependencies{
+		set: s,
+	}
+}
+
+const exists = true
+
+type dependencies struct {
+	set map[string]bool
+}
+
+func (d dependencies) Installs() []string {
+	keys := make([]string, len(d.set))
+
+	i := 0
+	for k := range d.set {
+		keys[i] = k
+		i++
+	}
+
+	return keys
+}
+
+func (d dependencies) Configure(cfg Configurable) {
+	cfg.Config().Dependencies.merge(d)
+}
+
+func (d dependencies) merge(other Dependencies) {
+	for _, dep := range other.Installs() {
+		d.set[dep] = exists
+	}
+}