Develop (#250)

cmd/linuxdb.go

@@ -0,0 +1,91 @@
+package cmd
+
+import (
+	"log"
+
+	"github.com/leaanthony/mewn"
+	"gopkg.in/yaml.v3"
+)
+
+// LinuxDB is the database for linux distribution data.
+type LinuxDB struct {
+	Distributions map[string]*Distribution `yaml:"distributions"`
+}
+
+// Distribution holds the os-release ID and a map of releases.
+type Distribution struct {
+	ID       string              `yaml:"id"`
+	Releases map[string]*Release `yaml:"releases"`
+}
+
+// GetRelease attempts to return the specific Release information
+// for the given release name. If there is no specific match, the
+// default release data is returned.
+func (d *Distribution) GetRelease(version string) *Release {
+	result := d.Releases[version]
+	if result == nil {
+		result = d.Releases["default"]
+	}
+	return result
+}
+
+// Release holds the name and version of the release as given by
+// os-release. Programs is a slice of dependant programs required
+// to be present on the local installation for Wails to function.
+// Libraries is a slice of libraries that must be present for Wails
+// applications to compile.
+type Release struct {
+	Name              string          `yaml:"name"`
+	Version           string          `yaml:"version"`
+	GccVersionCommand string          `yaml:"gccversioncommand"`
+	Programs          []*Prerequisite `yaml:"programs"`
+	Libraries         []*Prerequisite `yaml:"libraries"`
+}
+
+// Prerequisite is a simple struct containing a program/library name
+// plus the distribution specific help text indicating how to install
+// it.
+type Prerequisite struct {
+	Name string `yaml:"name"`
+	Help string `yaml:"help,omitempty"`
+}
+
+// Load will load the given filename from disk and attempt to
+// import the data into the LinuxDB.
+func (l *LinuxDB) Load(filename string) error {
+	if fs.FileExists(filename) {
+		data, err := fs.LoadAsBytes(filename)
+		if err != nil {
+			return err
+		}
+		return l.ImportData(data)
+	}
+	return nil
+}
+
+// ImportData will unmarshal the given YAML formatted data
+// into the LinuxDB
+func (l *LinuxDB) ImportData(data []byte) error {
+	return yaml.Unmarshal(data, l)
+}
+
+// GetDistro returns the Distribution information for the
+// given distribution name. If the distribution is not supported,
+// nil is returned.
+func (l *LinuxDB) GetDistro(distro string) *Distribution {
+	return l.Distributions[distro]
+}
+
+// NewLinuxDB creates a new LinuxDB instance from the bundled
+// linuxdb.yaml file.
+func NewLinuxDB() *LinuxDB {
+	data := mewn.Bytes("./linuxdb.yaml")
+	result := LinuxDB{
+		Distributions: make(map[string]*Distribution),
+	}
+	err := result.ImportData(data)
+	if err != nil {
+		log.Fatal(err)
+	}
+	return &result
+}