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inspect.go
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/
inspect.go
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package inspect
import (
"fmt"
"io"
"sort"
"text/tabwriter"
"github.com/docker/app/internal/settings"
"github.com/docker/app/internal/yaml"
"github.com/docker/app/types"
"github.com/docker/app/types/metadata"
"github.com/pkg/errors"
)
// Inspect dumps the metadata of an app
func Inspect(out io.Writer, app *types.App) error {
var meta metadata.AppMetadata
err := yaml.Unmarshal(app.Metadata(), &meta)
if err != nil {
return errors.Wrap(err, "failed to parse application metadata")
}
// extract settings
s, err := settings.LoadMultiple(app.Settings())
if err != nil {
return errors.Wrap(err, "failed to load application settings")
}
fs := s.Flatten()
// sort the keys to get consistent output
var settingsKeys []string
for k := range fs {
settingsKeys = append(settingsKeys, k)
}
sort.Slice(settingsKeys, func(i, j int) bool { return settingsKeys[i] < settingsKeys[j] })
// build maintainers string
maintainers := meta.Maintainers.String()
fmt.Fprintf(out, "%s %s\n", meta.Name, meta.Version)
if maintainers != "" {
fmt.Fprintf(out, "Maintained by: %s\n", maintainers)
fmt.Fprintln(out, "")
}
if meta.Description != "" {
fmt.Fprintf(out, "%s\n", meta.Description)
fmt.Fprintln(out, "")
}
w := tabwriter.NewWriter(out, 0, 0, 1, ' ', 0)
fmt.Fprintln(w, "Setting\tDefault")
fmt.Fprintln(w, "-------\t-------")
for _, k := range settingsKeys {
fmt.Fprintf(w, "%s\t%s\n", k, fs[k])
}
w.Flush()
return nil
}