feat: values updaters

internal/data/updater/exec/updater_handler.go

@@ -0,0 +1,57 @@
+package exec
+
+import (
+	"io"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+const SchemeExec = "exec"
+
+type UpdaterHandler struct{}
+
+func (h *UpdaterHandler) Match(url *url.URL) bool {
+	return url.Scheme == SchemeExec
+}
+
+func (u *UpdaterHandler) Update(url *url.URL) (io.WriteCloser, error) {
+	path := filepath.Join(url.Host, url.Path)
+
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	cmd := exec.Command(absPath)
+
+	if url.Query().Get("env") == "yes" {
+		cmd.Env = os.Environ()
+	}
+
+	if url.Query().Get("stdout") == "yes" {
+		cmd.Stdout = os.Stdout
+	}
+
+	if url.Query().Get("stderr") == "yes" {
+		cmd.Stderr = os.Stderr
+	}
+
+	writer, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		panic(errors.WithStack(err))
+	}
+
+	return writer, nil
+}
+
+func NewUpdaterHandler() *UpdaterHandler {
+	return &UpdaterHandler{}
+}

internal/data/updater/file/updater_handler.go

@@ -0,0 +1,33 @@
+package file
+
+import (
+	"io"
+	"net/url"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+)
+
+const SchemeFile = "file"
+
+type UpdaterHandler struct{}
+
+func (h *UpdaterHandler) Match(url *url.URL) bool {
+	return url.Scheme == SchemeFile
+}
+
+func (u *UpdaterHandler) Update(url *url.URL) (io.WriteCloser, error) {
+	name := filepath.Join(url.Host, url.Path)
+
+	file, err := os.Create(name)
+	if err != nil {
+		return nil, errors.Wrapf(err, "could not open file '%s'", name)
+	}
+
+	return file, nil
+}
+
+func NewUpdaterHandler() *UpdaterHandler {
+	return &UpdaterHandler{}
+}

internal/data/updater/stdout/updater_handler.go

@@ -0,0 +1,23 @@
+package stdout
+
+import (
+	"io"
+	"net/url"
+	"os"
+)
+
+const SchemeStdout = "stdout"
+
+type UpdaterHandler struct{}
+
+func (h *UpdaterHandler) Match(url *url.URL) bool {
+	return url.Scheme == SchemeStdout
+}
+
+func (u *UpdaterHandler) Update(url *url.URL) (io.WriteCloser, error) {
+	return os.Stdout, nil
+}
+
+func NewUpdaterHandler() *UpdaterHandler {
+	return &UpdaterHandler{}
+}