github.com/grahambrereton-form3/tilt@v0.10.18/internal/tiltfile/dockerprune/docker_prune.go (about)

     1  package dockerprune
     2  
     3  import (
     4  	"fmt"
     5  	"time"
     6  
     7  	"go.starlark.net/starlark"
     8  
     9  	"github.com/windmilleng/tilt/pkg/model"
    10  
    11  	"github.com/windmilleng/tilt/internal/tiltfile/starkit"
    12  )
    13  
    14  // Implements functions for dealing with Docker Prune settings.
    15  type Extension struct {
    16  }
    17  
    18  func NewExtension() Extension {
    19  	return Extension{}
    20  }
    21  
    22  func (e Extension) NewState() interface{} {
    23  	return model.DockerPruneSettings{
    24  		Enabled:  true,
    25  		MaxAge:   model.DockerPruneDefaultMaxAge,
    26  		Interval: model.DockerPruneDefaultInterval,
    27  	}
    28  }
    29  
    30  func (e Extension) OnStart(env *starkit.Environment) error {
    31  	return env.AddBuiltin("docker_prune_settings", e.dockerPruneSettings)
    32  }
    33  
    34  func (e Extension) dockerPruneSettings(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
    35  	var disable bool
    36  	var intervalHrs, numBuilds, maxAgeMins int
    37  	if err := starkit.UnpackArgs(thread, fn.Name(), args, kwargs,
    38  		"disable?", &disable,
    39  		"max_age_mins?", &maxAgeMins,
    40  		"num_builds?", &numBuilds,
    41  		"interval_hrs?", &intervalHrs); err != nil {
    42  		return nil, err
    43  	}
    44  
    45  	if numBuilds != 0 && intervalHrs != 0 {
    46  		return nil, fmt.Errorf("can't specify both 'prune every X builds' and 'prune every Y hours'; please pass " +
    47  			"only one of `num_builds` and `interval_hrs`")
    48  	}
    49  
    50  	err := starkit.SetState(thread, func(settings model.DockerPruneSettings) model.DockerPruneSettings {
    51  		settings.Enabled = !disable
    52  		if maxAgeMins != 0 {
    53  			settings.MaxAge = time.Duration(maxAgeMins) * time.Minute
    54  		}
    55  		settings.NumBuilds = numBuilds
    56  		if intervalHrs != 0 {
    57  			settings.Interval = time.Duration(intervalHrs) * time.Hour
    58  		}
    59  		return settings
    60  	})
    61  
    62  	return starlark.None, err
    63  }
    64  
    65  var _ starkit.StatefulExtension = Extension{}
    66  
    67  func MustState(model starkit.Model) model.DockerPruneSettings {
    68  	state, err := GetState(model)
    69  	if err != nil {
    70  		panic(err)
    71  	}
    72  	return state
    73  }
    74  
    75  func GetState(m starkit.Model) (model.DockerPruneSettings, error) {
    76  	var state model.DockerPruneSettings
    77  	err := m.Load(&state)
    78  	return state, err
    79  }