Add lint steps to Dagger module

.dagger/main.go

@@ -8,17 +8,26 @@ import (
 
 type Quintodrome struct{}
 
-// Ci runs the full Linux CI: Go build + test and JS build + test.
+// Ci runs the full Linux CI: lint, build, and test for both Go and JS.
 func (m *Quintodrome) Ci(ctx context.Context,
 	// +defaultPath="."
 	src *dagger.Directory,
 ) error {
+	if err := m.LintGo(ctx, src); err != nil {
+		return err
+	}
+	if err := m.FmtGo(ctx, src); err != nil {
+		return err
+	}
 	if err := m.BuildGo(ctx, src); err != nil {
 		return err
 	}
 	if err := m.TestGo(ctx, src); err != nil {
 		return err
 	}
+	if err := m.LintJS(ctx, src); err != nil {
+		return err
+	}
 	if err := m.BuildJS(ctx, src); err != nil {
 		return err
 	}
@@ -28,6 +37,31 @@ func (m *Quintodrome) Ci(ctx context.Context,
 	return nil
 }
 
+// LintGo runs golangci-lint with the repo's .golangci.yml.
+func (m *Quintodrome) LintGo(ctx context.Context, src *dagger.Directory) error {
+	_, err := goContainer().
+		WithDirectory("/repo", src).
+		WithWorkdir("/repo").
+		WithExec([]string{"sh", "-c", "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /usr/local/bin v2.12.0"}).
+		WithExec([]string{"golangci-lint", "run", "--timeout", "2m"}).
+		Sync(ctx)
+	return err
+}
+
+// FmtGo checks that goimports and go mod tidy leave the tree clean.
+func (m *Quintodrome) FmtGo(ctx context.Context, src *dagger.Directory) error {
+	_, err := goContainer().
+		WithDirectory("/repo", src).
+		WithWorkdir("/repo").
+		WithExec([]string{"sh", "-c", `
+go run golang.org/x/tools/cmd/goimports@latest -w $(find . -name '*.go' | grep -v '_gen.go$' | grep -v '.pb.go$')
+go mod tidy
+test -z "$(git status --porcelain)"
+`}).
+		Sync(ctx)
+	return err
+}
+
 // BuildGo compiles the Navidrome server and all packages.
 func (m *Quintodrome) BuildGo(ctx context.Context, src *dagger.Directory) error {
 	_, err := goContainer().
@@ -48,6 +82,18 @@ func (m *Quintodrome) TestGo(ctx context.Context, src *dagger.Directory) error {
 	return err
 }
 
+// LintJS runs prettier and eslint in the web UI.
+func (m *Quintodrome) LintJS(ctx context.Context, src *dagger.Directory) error {
+	_, err := jsContainer().
+		WithDirectory("/repo", src).
+		WithWorkdir("/repo/ui").
+		WithExec([]string{"npm", "ci", "--ignore-scripts"}).
+		WithExec([]string{"npm", "run", "check-formatting"}).
+		WithExec([]string{"npm", "run", "lint"}).
+		Sync(ctx)
+	return err
+}
+
 // BuildJS builds the Navidrome web UI.
 func (m *Quintodrome) BuildJS(ctx context.Context, src *dagger.Directory) error {
 	_, err := jsContainer().