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tiltfile.go
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tiltfile.go
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package tiltfile
import (
"context"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"time"
"go.starlark.net/resolve"
"go.starlark.net/starlark"
"github.com/windmilleng/tilt/internal/analytics"
"github.com/windmilleng/tilt/internal/dockercompose"
"github.com/windmilleng/tilt/internal/feature"
"github.com/windmilleng/tilt/internal/k8s"
"github.com/windmilleng/tilt/internal/ospath"
"github.com/windmilleng/tilt/internal/tiltfile/dockerprune"
"github.com/windmilleng/tilt/internal/tiltfile/k8scontext"
"github.com/windmilleng/tilt/internal/tiltfile/value"
"github.com/windmilleng/tilt/pkg/model"
)
const FileName = "Tiltfile"
const TiltIgnoreFileName = ".tiltignore"
func init() {
resolve.AllowLambda = true
resolve.AllowNestedDef = true
resolve.AllowGlobalReassign = true
}
type TiltfileLoadResult struct {
Manifests []model.Manifest
ConfigFiles []string
Warnings []string
TiltIgnoreContents string
FeatureFlags map[string]bool
TeamName string
Secrets model.SecretSet
Error error
DockerPruneSettings model.DockerPruneSettings
}
func (r TiltfileLoadResult) Orchestrator() model.Orchestrator {
for _, manifest := range r.Manifests {
if manifest.IsK8s() {
return model.OrchestratorK8s
} else if manifest.IsDC() {
return model.OrchestratorDC
}
}
return model.OrchestratorUnknown
}
type TiltfileLoader interface {
// Load the Tiltfile.
//
// By design, Load() always returns a result.
// We want to be very careful not to treat non-zero exit codes like an error.
// Because even if the Tiltfile has errors, we might need to watch files
// or return partial results (like enabled features).
Load(ctx context.Context, filename string, matching map[string]bool) TiltfileLoadResult
}
type FakeTiltfileLoader struct {
Result TiltfileLoadResult
}
var _ TiltfileLoader = &FakeTiltfileLoader{}
func NewFakeTiltfileLoader() *FakeTiltfileLoader {
return &FakeTiltfileLoader{}
}
func (tfl *FakeTiltfileLoader) Load(ctx context.Context, filename string, matching map[string]bool) TiltfileLoadResult {
return tfl.Result
}
func ProvideTiltfileLoader(
analytics *analytics.TiltAnalytics,
kCli k8s.Client,
k8sContextExt k8scontext.Extension,
dcCli dockercompose.DockerComposeClient,
fDefaults feature.Defaults) TiltfileLoader {
return tiltfileLoader{
analytics: analytics,
kCli: kCli,
k8sContextExt: k8sContextExt,
dcCli: dcCli,
fDefaults: fDefaults,
}
}
type tiltfileLoader struct {
analytics *analytics.TiltAnalytics
kCli k8s.Client
dcCli dockercompose.DockerComposeClient
k8sContextExt k8scontext.Extension
fDefaults feature.Defaults
}
var _ TiltfileLoader = &tiltfileLoader{}
func printWarnings(s *tiltfileState) {
for _, w := range s.warnings {
s.logger.Infof("WARNING: %s\n", w)
}
}
// Load loads the Tiltfile in `filename`
func (tfl tiltfileLoader) Load(ctx context.Context, filename string, matching map[string]bool) TiltfileLoadResult {
start := time.Now()
absFilename, err := ospath.RealAbs(filename)
if err != nil {
if os.IsNotExist(err) {
return TiltfileLoadResult{
ConfigFiles: []string{filename},
Error: fmt.Errorf("No Tiltfile found at paths '%s'. Check out https://docs.tilt.dev/tutorial.html", filename),
}
}
absFilename, _ = filepath.Abs(filename)
return TiltfileLoadResult{
ConfigFiles: []string{absFilename},
Error: err,
}
}
tiltIgnorePath := tiltIgnorePath(absFilename)
tlr := TiltfileLoadResult{
ConfigFiles: []string{absFilename, tiltIgnorePath},
}
tiltIgnoreContents, err := ioutil.ReadFile(tiltIgnorePath)
// missing tiltignore is fine, but a filesystem error is not
if err != nil && !os.IsNotExist(err) {
tlr.Error = err
return tlr
}
tlr.TiltIgnoreContents = string(tiltIgnoreContents)
privateRegistry := tfl.kCli.PrivateRegistry(ctx)
s := newTiltfileState(ctx, tfl.dcCli, tfl.k8sContextExt, privateRegistry, feature.FromDefaults(tfl.fDefaults))
manifests, result, err := s.loadManifests(absFilename, matching)
tlr.Secrets = s.extractSecrets()
tlr.ConfigFiles = s.configFiles
tlr.Warnings = s.warnings
tlr.FeatureFlags = s.features.ToEnabled()
tlr.Error = err
tlr.Manifests = manifests
tlr.TeamName = s.teamName
dps, err := dockerprune.GetState(result)
if err != nil {
if tlr.Error == nil {
tlr.Error = err
}
return tlr
}
tlr.DockerPruneSettings = dps
printWarnings(s)
s.logger.Infof("Successfully loaded Tiltfile")
tfl.reportTiltfileLoaded(s.builtinCallCounts, s.builtinArgCounts, time.Since(start))
return tlr
}
// .tiltignore sits next to Tiltfile
func tiltIgnorePath(tiltfilePath string) string {
return filepath.Join(filepath.Dir(tiltfilePath), TiltIgnoreFileName)
}
func skylarkStringDictToGoMap(d *starlark.Dict) (map[string]string, error) {
r := map[string]string{}
for _, tuple := range d.Items() {
kV, ok := AsString(tuple[0])
if !ok {
return nil, fmt.Errorf("key is not a string: %T (%v)", tuple[0], tuple[0])
}
k := string(kV)
vV, ok := AsString(tuple[1])
if !ok {
return nil, fmt.Errorf("value is not a string: %T (%v)", tuple[1], tuple[1])
}
v := string(vV)
r[k] = v
}
return r, nil
}
func starlarkValueOrSequenceToSlice(v starlark.Value) []starlark.Value {
return value.ValueOrSequenceToSlice(v)
}
func (tfl *tiltfileLoader) reportTiltfileLoaded(callCounts map[string]int,
argCounts map[string]map[string]int, loadDur time.Duration) {
tags := make(map[string]string)
for builtinName, count := range callCounts {
tags[fmt.Sprintf("tiltfile.invoked.%s", builtinName)] = strconv.Itoa(count)
}
for builtinName, counts := range argCounts {
for argName, count := range counts {
tags[fmt.Sprintf("tiltfile.invoked.%s.arg.%s", builtinName, argName)] = strconv.Itoa(count)
}
}
tfl.analytics.Incr("tiltfile.loaded", tags)
tfl.analytics.Timer("tiltfile.load", loadDur, nil)
}