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prune.go
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prune.go
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package main
import (
"fmt"
"os"
"text/tabwriter"
"github.com/moby/buildkit/client"
bccommon "github.com/moby/buildkit/cmd/buildctl/common"
"github.com/sirupsen/logrus"
"github.com/tonistiigi/units"
"github.com/urfave/cli"
)
var pruneCommand = cli.Command{
Name: "prune",
Usage: "clean up build cache",
Action: prune,
Flags: []cli.Flag{
cli.DurationFlag{
Name: "keep-duration",
Usage: "Keep data newer than this limit",
},
cli.Float64Flag{
Name: "keep-storage",
Usage: "Keep data below this limit (in MB)",
},
cli.StringSliceFlag{
Name: "filter, f",
Usage: "Filter records",
},
cli.BoolFlag{
Name: "all",
Usage: "Include internal/frontend references",
},
cli.BoolFlag{
Name: "verbose, v",
Usage: "Verbose output",
},
cli.StringFlag{
Name: "format",
Usage: "Format the output using the given Go template, e.g, '{{json .}}'",
},
},
}
func prune(clicontext *cli.Context) error {
c, err := bccommon.ResolveClient(clicontext)
if err != nil {
return err
}
ch := make(chan client.UsageInfo)
printed := make(chan struct{})
var summarizer func()
opts := []client.PruneOption{
client.WithFilter(clicontext.StringSlice("filter")),
client.WithKeepOpt(clicontext.Duration("keep-duration"), int64(clicontext.Float64("keep-storage")*1e6)),
}
if clicontext.Bool("all") {
opts = append(opts, client.PruneAll)
}
if format := clicontext.String("format"); format != "" {
if clicontext.Bool("verbose") {
logrus.Debug("Ignoring --verbose")
}
tmpl, err := bccommon.ParseTemplate(format)
if err != nil {
return err
}
go func() {
defer close(printed)
for du := range ch {
// Unlike `buildctl du`, the template is applied to a UsageInfo, not to a slice of UsageInfo
if err := tmpl.Execute(clicontext.App.Writer, du); err != nil {
panic(err)
}
if _, err = fmt.Fprintf(clicontext.App.Writer, "\n"); err != nil {
panic(err)
}
}
}()
} else {
tw := tabwriter.NewWriter(os.Stdout, 1, 8, 1, '\t', 0)
first := true
total := int64(0)
go func() {
defer close(printed)
for du := range ch {
total += du.Size
if clicontext.Bool("verbose") {
printVerbose(tw, []*client.UsageInfo{&du})
} else {
if first {
printTableHeader(tw)
first = false
}
printTableRow(tw, &du)
tw.Flush()
}
}
}()
summarizer = func() {
tw = tabwriter.NewWriter(os.Stdout, 1, 8, 1, '\t', 0)
fmt.Fprintf(tw, "Total:\t%.2f\n", units.Bytes(total))
tw.Flush()
}
}
err = c.Prune(bccommon.CommandContext(clicontext), ch, opts...)
close(ch)
<-printed
if err != nil {
return err
}
if summarizer != nil {
summarizer()
}
return nil
}