/
confstate.go
188 lines (166 loc) · 3.82 KB
/
confstate.go
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package confstate
import (
"encoding/json"
"gopkg.in/yaml.v2"
"io/ioutil"
"log"
"os"
"path/filepath"
"github.com/mitchellh/go-homedir"
)
const (
DBTWork = iota // DefaultBaseDir is WorkDir
DBTHome // DefaultBaseDir is HomeDir
DBTBin // DefaultBaseDir is Offset from excutable binary
)
var (
Configs interface{} // Configs data
States interface{} // States data
BaseDir string // Base directory
ConfigsFile string // ConfigsFile Filename
StatesFile string // StatesFile Filename
OffsetFromBin string // Base directory offset from executable binary
DefaultConfigsFile string // Default filename ConfigFile (relative path)
DefaultStatesFile string // Default filename StatesFile (relative path)
DefaultBaseDirType int = DBTBin // Basedir get offset from executable binary
NewConfigsFile bool = false // Create New ConfigsFile
NewStatesFile bool = false // Create New StatesFile
Debug bool = false // Debug Mode
)
// GetDir Get absorute directory from excutable binary
func GetDir(p string) (string, error) {
return filepath.Abs(filepath.Join(BaseDir, p))
}
// LoadConfigs Initialize and Load
func LoadConfigs() error {
// set BaseDir
if BaseDir == "" {
switch DefaultBaseDirType {
case DBTBin:
// Get relative directory from executable binary
exe, err := os.Executable()
if err != nil {
log.Fatal(err)
}
b, err := filepath.Abs(filepath.Join(filepath.Dir(exe), OffsetFromBin))
if err != nil {
log.Fatal(err)
}
BaseDir = b
case DBTHome:
b,err := homedir.Dir()
if err != nil {
log.Fatal(err)
}
BaseDir = b
case DBTWork:
b,err := os.Getwd()
if err != nil {
log.Fatal(err)
}
BaseDir = b
}
}
// Set default value if ConfigsFile is empty
if ConfigsFile == "" {
if c, err := GetDir(DefaultConfigsFile); err != nil {
return err
} else {
ConfigsFile = c
}
}
// create directory
if err := createPath(ConfigsFile); err != nil {
return err
}
if _, err := os.Stat(ConfigsFile); !os.IsNotExist(err) {
// Load ConfigsFile
buf, err := ioutil.ReadFile(ConfigsFile)
if err != nil {
return err
}
err = yaml.Unmarshal(buf, Configs)
if err != nil {
return err
}
if Debug {
log.Printf("Load: %s", ConfigsFile)
}
} else {
// Create a file with default values
buf, err := yaml.Marshal(Configs)
if err != nil {
return err
}
err = ioutil.WriteFile(ConfigsFile, buf, 0644)
if err != nil {
return err
}
NewConfigsFile = true
if Debug {
log.Printf("Save: %s", ConfigsFile)
}
}
return nil
}
// LoadStates Load StatesFile
func LoadStates() error {
if err := createPath(StatesFile); err != nil {
return err
}
if StatesFile == "" {
if c, err := GetDir(DefaultStatesFile); err != nil {
log.Fatal(err)
} else {
StatesFile = c
}
}
// Skip if StatesFile not exist
if _, err := os.Stat(StatesFile); os.IsNotExist(err) {
return nil
}
buf, err := ioutil.ReadFile(StatesFile)
if err != nil {
return err
}
err = json.Unmarshal(buf, States)
if err != nil {
return err
}
if Debug {
log.Printf("Load: %s", StatesFile)
}
return nil
}
// SaveStates Save StatesFile
func SaveStates() error {
fileExist := true
if _, err := os.Stat(StatesFile); os.IsNotExist(err) {
fileExist = false
}
buf, err := json.MarshalIndent(States, "", "\t")
if err != nil {
return err
}
err = ioutil.WriteFile(StatesFile, buf, 0644)
if err != nil {
return err
}
if !fileExist {
NewStatesFile = true
}
if Debug {
log.Printf("Save: %s", StatesFile)
}
return nil
}
// create directory if not exists
func createPath(n string) error {
d := filepath.Dir(n)
if _, err := os.Stat(d); os.IsNotExist(err) {
if err := os.MkdirAll(d,0755); err != nil {
return err
}
}
return nil
}