122 lines
2.7 KiB
Go
122 lines
2.7 KiB
Go
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package staert
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import (
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"os"
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"path/filepath"
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"strings"
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"github.com/BurntSushi/toml"
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"github.com/containous/flaeg"
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)
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var _ Source = (*TomlSource)(nil)
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// TomlSource implement staert.Source
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type TomlSource struct {
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filename string
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dirNFullPath []string
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fullPath string
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}
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// NewTomlSource creates and return a pointer on Source.
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// Parameter filename is the file name (without extension type, ".toml" will be added)
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// dirNFullPath may contain directories or fullPath to the file.
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func NewTomlSource(filename string, dirNFullPath []string) *TomlSource {
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return &TomlSource{filename, dirNFullPath, ""}
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}
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// ConfigFileUsed return config file used
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func (ts *TomlSource) ConfigFileUsed() string {
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return ts.fullPath
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}
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// Parse calls toml.DecodeFile() func
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func (ts *TomlSource) Parse(cmd *flaeg.Command) (*flaeg.Command, error) {
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ts.fullPath = findFile(ts.filename, ts.dirNFullPath)
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if len(ts.fullPath) < 2 {
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return cmd, nil
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}
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metadata, err := toml.DecodeFile(ts.fullPath, cmd.Config)
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if err != nil {
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return nil, err
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}
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boolFlags, err := flaeg.GetBoolFlags(cmd.Config)
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if err != nil {
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return nil, err
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}
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flgArgs, hasUnderField, err := generateArgs(metadata, boolFlags)
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if err != nil {
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return nil, err
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}
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err = flaeg.Load(cmd.Config, cmd.DefaultPointersConfig, flgArgs)
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if err != nil && err != flaeg.ErrParserNotFound {
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return nil, err
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}
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if hasUnderField {
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_, err := toml.DecodeFile(ts.fullPath, cmd.Config)
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if err != nil {
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return nil, err
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}
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}
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return cmd, nil
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}
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func preProcessDir(dirIn string) (string, error) {
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expanded := os.ExpandEnv(dirIn)
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return filepath.Abs(expanded)
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}
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func findFile(filename string, dirNFile []string) string {
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for _, df := range dirNFile {
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if df != "" {
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fullPath, _ := preProcessDir(df)
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if fileInfo, err := os.Stat(fullPath); err == nil && !fileInfo.IsDir() {
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return fullPath
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}
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fullPath = filepath.Join(fullPath, filename+".toml")
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if fileInfo, err := os.Stat(fullPath); err == nil && !fileInfo.IsDir() {
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return fullPath
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}
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}
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}
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return ""
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}
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func generateArgs(metadata toml.MetaData, flags []string) ([]string, bool, error) {
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var flgArgs []string
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keys := metadata.Keys()
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hasUnderField := false
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for i, key := range keys {
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if metadata.Type(key.String()) == "Hash" {
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// TOML hashes correspond to Go structs or maps.
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for j := i; j < len(keys); j++ {
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if strings.Contains(keys[j].String(), key.String()+".") {
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hasUnderField = true
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break
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}
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}
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match := false
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for _, flag := range flags {
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if flag == strings.ToLower(key.String()) {
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match = true
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break
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}
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}
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if match {
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flgArgs = append(flgArgs, "--"+strings.ToLower(key.String()))
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}
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}
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}
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return flgArgs, hasUnderField, nil
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}
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