forked from mirrors/ntfy
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
package cmd
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import (
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"fmt"
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"github.com/urfave/cli/v2"
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"github.com/urfave/cli/v2/altsrc"
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"gopkg.in/yaml.v2"
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"heckel.io/ntfy/util"
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"os"
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)
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// initConfigFileInputSourceFunc is like altsrc.InitInputSourceWithContext and altsrc.NewYamlSourceFromFlagFunc, but checks
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// if the config flag is exists and only loads it if it does. If the flag is set and the file exists, it fails.
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func initConfigFileInputSourceFunc(configFlag string, flags []cli.Flag, next cli.BeforeFunc) cli.BeforeFunc {
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return func(context *cli.Context) error {
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configFile := context.String(configFlag)
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if context.IsSet(configFlag) && !util.FileExists(configFile) {
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return fmt.Errorf("config file %s does not exist", configFile)
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} else if !context.IsSet(configFlag) && !util.FileExists(configFile) {
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return nil
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}
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inputSource, err := newYamlSourceFromFile(configFile, flags)
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if err != nil {
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return err
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}
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if err := altsrc.ApplyInputSourceValues(context, inputSource, flags); err != nil {
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return err
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}
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if next != nil {
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if err := next(context); err != nil {
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return err
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}
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}
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return nil
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}
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}
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// newYamlSourceFromFile creates a new Yaml InputSourceContext from a filepath.
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//
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// This function also maps aliases, so a .yml file can contain short options, or options with underscores
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// instead of dashes. See https://github.com/binwiederhier/ntfy/issues/255.
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func newYamlSourceFromFile(file string, flags []cli.Flag) (altsrc.InputSourceContext, error) {
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var rawConfig map[interface{}]interface{}
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b, err := os.ReadFile(file)
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if err != nil {
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return nil, err
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}
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if err := yaml.Unmarshal(b, &rawConfig); err != nil {
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return nil, err
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}
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for _, f := range flags {
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flagName := f.Names()[0]
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for _, flagAlias := range f.Names()[1:] {
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if _, ok := rawConfig[flagAlias]; ok {
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rawConfig[flagName] = rawConfig[flagAlias]
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}
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}
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}
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return altsrc.NewMapInputSource(file, rawConfig), nil
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}
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