1 files changed, 106 insertions, 0 deletions
diff --git a/runner/js/js.go b/runner/js/js.go
new file mode 100644
index 0000000..7c2af58
--- /dev/null
+++ b/runner/js/js.go
@@ -0,0 +1,106 @@
+package js
+
+import (
+	"errors"
+	"github.com/ewy1/pik/identity"
+	"github.com/ewy1/pik/model"
+	"github.com/ewy1/pik/runner"
+	"os/exec"
+	"path/filepath"
+	"slices"
+)
+
+var jsExtensions = []string{
+	".js",
+	".cjs",
+}
+
+var tsExtensions = []string{
+	".ts",
+}
+
+var extensions = append(jsExtensions, tsExtensions...)
+
+var managers = []string{
+	"pnpm",
+	"yarn",
+	"npm",
+}
+
+var jsInterpreters = []string{
+	"node",
+	"bun",
+}
+
+var tsInterpeters = []string{
+	"ts",
+	"ts-node",
+	"bun",
+}
+
+type js struct {
+	JsInterpreter string
+	TsInterpreter string
+	Npm           string
+}
+
+var Js = &js{}
+
+var UnsupportedFile = errors.New("unsupported file")
+var NoJsInterpreter = errors.New("no js interpreter found in $PATH")
+var NoTsInterpreter = errors.New("no ts interpreter found in $PATH")
+var NoNpm = errors.New("npm not found in $PATH")
+
+func (n *js) Interpreter(file string) (string, error) {
+	ext := filepath.Ext(file)
+	if slices.Contains(jsInterpreters, ext) {
+		if n.JsInterpreter == "" {
+			return "", NoJsInterpreter
+		}
+		return n.JsInterpreter, nil
+	}
+	if slices.Contains(tsInterpeters, ext) {
+		if n.TsInterpreter == "" {
+			return "", NoTsInterpreter
+		}
+		return n.TsInterpreter, nil
+	}
+	return "", UnsupportedFile
+}
+
+func (n *js) Init() error {
+	for _, p := range jsInterpreters {
+		if r, err := exec.LookPath(p); err != nil {
+			n.JsInterpreter = r
+		}
+	}
+	for _, p := range tsInterpeters {
+		if r, err := exec.LookPath(p); err != nil {
+			n.TsInterpreter = r
+		}
+	}
+
+	for _, m := range managers {
+		if r, err := exec.LookPath(m); err == nil {
+			n.Npm = r
+		}
+	}
+
+	return nil
+}
+
+var npmSub = []string{
+	"npm",
+}
+
+func (n *js) CreateRun(name, cmd string) model.Target {
+	return &Npm{
+		BaseTarget: runner.BaseTarget{
+			Identity: identity.New(cmd),
+			MyTags:   model.TagsFromFilename(cmd),
+			MySub:    npmSub,
+		},
+		Name: name,
+		Cmd:  cmd,
+	}
+}