DockerCLI/cli/command/formatter/diff.go

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package formatter
import (
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/pkg/archive"
)
const (
defaultDiffTableFormat = "table {{.Type}}\t{{.Path}}"
changeTypeHeader = "CHANGE TYPE"
pathHeader = "PATH"
)
// NewDiffFormat returns a format for use with a diff Context
func NewDiffFormat(source string) Format {
switch source {
case TableFormatKey:
return defaultDiffTableFormat
}
return Format(source)
}
// DiffWrite writes formatted diff using the Context
func DiffWrite(ctx Context, changes []container.ContainerChangeResponseItem) error {
render := func(format func(subContext subContext) error) error {
for _, change := range changes {
if err := format(&diffContext{c: change}); err != nil {
return err
}
}
return nil
}
return ctx.Write(newDiffContext(), render)
}
type diffContext struct {
HeaderContext
c container.ContainerChangeResponseItem
}
func newDiffContext() *diffContext {
diffCtx := diffContext{}
diffCtx.header = map[string]string{
"Type": changeTypeHeader,
"Path": pathHeader,
}
return &diffCtx
}
func (d *diffContext) MarshalJSON() ([]byte, error) {
return marshalJSON(d)
}
func (d *diffContext) Type() string {
var kind string
switch d.c.Kind {
case archive.ChangeModify:
kind = "C"
case archive.ChangeAdd:
kind = "A"
case archive.ChangeDelete:
kind = "D"
}
return kind
}
func (d *diffContext) Path() string {
return d.c.Path
}