gear: Extract netboot artifacts

This changeset also adds a `config_url` and `options` keyword in the c3os config.
Along with that the config logic is changed so the configuration is taken also from boot commands and merged in the final installed config file.

internal/machine/bootcmdline.go

@@ -0,0 +1,88 @@
+package machine
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"strings"
+
+	"github.com/google/shlex"
+	"github.com/hashicorp/go-multierror"
+	"github.com/itchyny/gojq"
+	"gopkg.in/yaml.v2"
+)
+
+func DotToYAML(file string) ([]byte, error) {
+	if file == "" {
+		file = "/proc/cmdline"
+	}
+	dat, err := ioutil.ReadFile(file)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	v := stringToMap(string(dat))
+
+	return dotToYAML(v)
+}
+
+func stringToMap(s string) map[string]interface{} {
+	v := map[string]interface{}{}
+
+	splitted, _ := shlex.Split(s)
+	for _, item := range splitted {
+		parts := strings.SplitN(item, "=", 2)
+		value := "true"
+		if len(parts) > 1 {
+			value = strings.Trim(parts[1], `"`)
+		}
+		key := strings.Trim(parts[0], `"`)
+		v[key] = value
+	}
+
+	return v
+}
+func jq(command string, data map[string]interface{}) (map[string]interface{}, error) {
+	query, err := gojq.Parse(command)
+	if err != nil {
+		return nil, err
+	}
+	code, err := gojq.Compile(query)
+	if err != nil {
+		return nil, err
+	}
+	iter := code.Run(data)
+
+	v, ok := iter.Next()
+	if !ok {
+		return nil, errors.New("failed getting rsult from gojq")
+	}
+	if err, ok := v.(error); ok {
+		return nil, err
+	}
+	if t, ok := v.(map[string]interface{}); ok {
+		return t, nil
+	}
+
+	return make(map[string]interface{}), nil
+}
+
+func dotToYAML(v map[string]interface{}) ([]byte, error) {
+	data := map[string]interface{}{}
+	var errs error
+
+	for k, value := range v {
+		newData, err := jq(fmt.Sprintf(".%s=\"%s\"", k, value), data)
+		if err != nil {
+			errs = multierror.Append(errs, err)
+			continue
+		}
+		data = newData
+	}
+
+	out, err := yaml.Marshal(&data)
+	if err != nil {
+		errs = multierror.Append(errs, err)
+	}
+	return out, err
+}

internal/machine/bootcmdline_test.go

@@ -0,0 +1,29 @@
+package machine_test
+
+import (
+	"io/ioutil"
+	"os"
+
+	. "github.com/c3os-io/c3os/internal/machine"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("BootCMDLine", func() {
+	Context("parses data", func() {
+
+		It("returns cmdline if provided", func() {
+			f, err := ioutil.TempFile("", "test")
+			Expect(err).ToNot(HaveOccurred())
+			defer os.RemoveAll(f.Name())
+
+			err = ioutil.WriteFile(f.Name(), []byte(`config_url="foo bar" baz.bar=""`), os.ModePerm)
+			Expect(err).ToNot(HaveOccurred())
+
+			b, err := DotToYAML(f.Name())
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(string(b)).To(Equal("baz:\n  bar: \"\"\nconfig_url: foo bar\n"))
+		})
+	})
+})

internal/machine/machine_suite_test.go

@@ -0,0 +1,13 @@
+package machine_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestInstaller(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Machine Suite")
+}