78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
package cli
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import (
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"io/ioutil"
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"os"
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"strings"
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"github.com/containous/traefik/pkg/config/file"
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"github.com/containous/traefik/pkg/config/flag"
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"github.com/containous/traefik/pkg/log"
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)
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// FileLoader loads a configuration from a file.
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type FileLoader struct {
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ConfigFileFlag string
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filename string
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}
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// GetFilename returns the configuration file if any.
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func (f *FileLoader) GetFilename() string {
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return f.filename
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}
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// Load loads the command's configuration from a file either specified with the -traefik.configfile flag, or from default locations.
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func (f *FileLoader) Load(args []string, cmd *Command) (bool, error) {
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ref, err := flag.Parse(args, cmd.Configuration)
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if err != nil {
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_ = PrintHelp(os.Stdout, cmd)
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return false, err
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}
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configFileFlag := "traefik.configfile"
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if f.ConfigFileFlag != "" {
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configFileFlag = "traefik." + strings.ToLower(f.ConfigFileFlag)
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}
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configFile, err := loadConfigFiles(ref[configFileFlag], cmd.Configuration)
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if err != nil {
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return false, err
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}
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f.filename = configFile
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if configFile == "" {
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return false, nil
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}
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logger := log.WithoutContext()
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logger.Printf("Configuration loaded from file: %s", configFile)
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content, _ := ioutil.ReadFile(configFile)
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logger.Debug(string(content))
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return true, nil
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}
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// loadConfigFiles tries to decode the given configuration file and all default locations for the configuration file.
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// It stops as soon as decoding one of them is successful.
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func loadConfigFiles(configFile string, element interface{}) (string, error) {
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finder := Finder{
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BasePaths: []string{"/etc/traefik/traefik", "$XDG_CONFIG_HOME/traefik", "$HOME/.config/traefik", "./traefik"},
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Extensions: []string{"toml", "yaml", "yml"},
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}
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filePath, err := finder.Find(configFile)
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if err != nil {
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return "", err
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}
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if len(filePath) == 0 {
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return "", nil
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}
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if err = file.Decode(filePath, element); err != nil {
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return "", err
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}
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return filePath, nil
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}
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