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files.go
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files.go
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package tiltfile
import (
"bytes"
"encoding/json"
"fmt"
"io"
"os"
"os/exec"
"github.com/windmilleng/tilt/internal/k8s"
tiltfile_io "github.com/windmilleng/tilt/internal/tiltfile/io"
"github.com/windmilleng/tilt/internal/tiltfile/starkit"
"github.com/windmilleng/tilt/internal/tiltfile/value"
"github.com/windmilleng/tilt/pkg/logger"
"github.com/ghodss/yaml"
"github.com/pkg/errors"
"go.starlark.net/starlark"
"github.com/windmilleng/tilt/internal/kustomize"
)
const localLogPrefix = " → "
func (s *tiltfileState) local(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var command string
err := s.unpackArgs(fn.Name(), args, kwargs, "command", &command)
if err != nil {
return nil, err
}
s.logger.Infof("local: %s", command)
out, err := s.execLocalCmd(thread, exec.Command("sh", "-c", command), true)
if err != nil {
return nil, err
}
return tiltfile_io.NewBlob(out, fmt.Sprintf("local: %s", command)), nil
}
func (s *tiltfileState) execLocalCmd(t *starlark.Thread, c *exec.Cmd, logOutput bool) (string, error) {
stdout := bytes.NewBuffer(nil)
stderr := bytes.NewBuffer(nil)
// TODO(nick): Should this also inject any docker.Env overrides?
c.Dir = starkit.AbsWorkingDir(t)
c.Stdout = stdout
c.Stderr = stderr
if logOutput {
logOutput := NewMutexWriter(logger.NewPrefixedWriter(localLogPrefix, s.logger.Writer(logger.InfoLvl)))
c.Stdout = io.MultiWriter(stdout, logOutput)
c.Stderr = io.MultiWriter(stderr, logOutput)
}
err := c.Run()
if err != nil {
// If we already logged the output, we don't need to log it again.
if logOutput {
return "", fmt.Errorf("command %q failed.\nerror: %v", c.Args, err)
}
errorMessage := fmt.Sprintf("command %q failed.\nerror: %v\nstdout: %q\nstderr: %q", c.Args, err, stdout.String(), stderr.String())
return "", errors.New(errorMessage)
}
if stdout.Len() == 0 && stderr.Len() == 0 {
s.logger.Infof("%s[no output]", localLogPrefix)
}
return stdout.String(), nil
}
func (s *tiltfileState) kustomize(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var path starlark.Value
err := s.unpackArgs(fn.Name(), args, kwargs, "paths", &path)
if err != nil {
return nil, err
}
kustomizePath, err := value.ValueToAbsPath(thread, path)
if err != nil {
return nil, fmt.Errorf("Argument 0 (paths): %v", err)
}
cmd := []string{"kustomize", "build", kustomizePath}
_, err = exec.LookPath(cmd[0])
if err != nil {
cmd = []string{"kubectl", "kustomize", kustomizePath}
}
yaml, err := s.execLocalCmd(thread, exec.Command(cmd[0], cmd[1:]...), false)
if err != nil {
return nil, err
}
deps, err := kustomize.Deps(kustomizePath)
if err != nil {
return nil, fmt.Errorf("internal error: %v", err)
}
for _, d := range deps {
err := tiltfile_io.RecordReadFile(thread, d)
if err != nil {
return nil, err
}
}
return tiltfile_io.NewBlob(yaml, fmt.Sprintf("kustomize: %s", kustomizePath)), nil
}
func (s *tiltfileState) helm(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var path starlark.Value
var name string
var namespace string
var valueFilesV starlark.Value
var setV starlark.Value
err := s.unpackArgs(fn.Name(), args, kwargs,
"paths", &path,
"name?", &name,
"namespace?", &namespace,
"values?", &valueFilesV,
"set?", &setV)
if err != nil {
return nil, err
}
localPath, err := value.ValueToAbsPath(thread, path)
if err != nil {
return nil, fmt.Errorf("Argument 0 (paths): %v", err)
}
valueFiles, ok := value.AsStringOrStringList(valueFilesV)
if !ok {
return nil, fmt.Errorf("Argument 'values' must be string or list of strings. Actual: %T",
valueFilesV)
}
set, ok := value.AsStringOrStringList(setV)
if !ok {
return nil, fmt.Errorf("Argument 'set' must be string or list of strings. Actual: %T", setV)
}
info, err := os.Stat(localPath)
if err != nil {
if os.IsNotExist(err) {
return nil, fmt.Errorf("Could not read Helm chart directory %q: does not exist", localPath)
}
return nil, fmt.Errorf("Could not read Helm chart directory %q: %v", localPath, err)
} else if !info.IsDir() {
return nil, fmt.Errorf("helm() may only be called on directories with Chart.yaml: %q", localPath)
}
cmd := []string{"helm", "template", localPath}
if name != "" {
cmd = append(cmd, "--name", name)
}
if namespace != "" {
cmd = append(cmd, "--namespace", namespace)
}
for _, valueFile := range valueFiles {
cmd = append(cmd, "--values", valueFile)
err := tiltfile_io.RecordReadFile(thread, starkit.AbsPath(thread, valueFile))
if err != nil {
return nil, err
}
}
for _, setArg := range set {
cmd = append(cmd, "--set", setArg)
}
stdout, err := s.execLocalCmd(thread, exec.Command(cmd[0], cmd[1:]...), false)
if err != nil {
return nil, err
}
err = tiltfile_io.RecordReadFile(thread, localPath)
if err != nil {
return nil, err
}
yaml := filterHelmTestYAML(string(stdout))
if namespace != "" {
// helm template --namespace doesn't inject the namespace, nor provide
// YAML that defines the namespace, so we have to do both ourselves :\
// https://github.com/helm/helm/issues/5465
parsed, err := k8s.ParseYAMLFromString(yaml)
if err != nil {
return nil, err
}
var haveYAMLForNamespace bool
for i, e := range parsed {
if e.GVK().Kind == "Namespace" && e.Name() == namespace {
// Chart already has YAML for the --namespace passed, we don't need to insert it
haveYAMLForNamespace = true
continue
}
parsed[i] = e.WithNamespace(namespace)
}
var entities []k8s.K8sEntity
if !haveYAMLForNamespace {
// User is relying on Helm to create the namespace, which it does independent
// of the YAML it generates, so we need to make sure the new namespace is included
// in the YAML.
entities = []k8s.K8sEntity{k8s.NewNamespaceEntity(namespace)}
}
entities = append(entities, parsed...)
yaml, err = k8s.SerializeSpecYAML(entities)
if err != nil {
return nil, err
}
}
return tiltfile_io.NewBlob(yaml, fmt.Sprintf("helm: %s", localPath)), nil
}
func (s *tiltfileState) readYaml(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var path starlark.String
var defaultValue starlark.Value
if err := s.unpackArgs(fn.Name(), args, kwargs, "paths", &path, "default?", &defaultValue); err != nil {
return nil, err
}
localPath, err := value.ValueToAbsPath(thread, path)
if err != nil {
return nil, fmt.Errorf("Argument 0 (paths): %v", err)
}
contents, err := tiltfile_io.ReadFile(thread, localPath)
if err != nil {
// Return the default value if the file doesn't exist AND a default value was given
if os.IsNotExist(err) && defaultValue != nil {
return defaultValue, nil
}
return nil, err
}
var decodedYAML interface{}
err = yaml.Unmarshal(contents, &decodedYAML)
if err != nil {
return nil, fmt.Errorf("error parsing YAML: %v in %s", err, path.GoString())
}
v, err := convertStructuredDataToStarlark(decodedYAML)
if err != nil {
return nil, fmt.Errorf("error converting YAML to Starlark: %v in %s", err, path.GoString())
}
return v, nil
}
func (s *tiltfileState) decodeJSON(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var jsonString starlark.String
if err := s.unpackArgs(fn.Name(), args, kwargs, "json", &jsonString); err != nil {
return nil, err
}
var decodedJSON interface{}
if err := json.Unmarshal([]byte(jsonString), &decodedJSON); err != nil {
return nil, fmt.Errorf("JSON parsing error: %v in %s", err, jsonString.GoString())
}
v, err := convertStructuredDataToStarlark(decodedJSON)
if err != nil {
return nil, fmt.Errorf("error converting JSON to Starlark: %v in %s", err, jsonString.GoString())
}
return v, nil
}
func (s *tiltfileState) readJson(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var path starlark.String
var defaultValue starlark.Value
if err := s.unpackArgs(fn.Name(), args, kwargs, "paths", &path, "default?", &defaultValue); err != nil {
return nil, err
}
localPath, err := value.ValueToAbsPath(thread, path)
if err != nil {
return nil, fmt.Errorf("Argument 0 (paths): %v", err)
}
contents, err := tiltfile_io.ReadFile(thread, localPath)
if err != nil {
// Return the default value if the file doesn't exist AND a default value was given
if os.IsNotExist(err) && defaultValue != nil {
return defaultValue, nil
}
return nil, err
}
var decodedJSON interface{}
if err := json.Unmarshal(contents, &decodedJSON); err != nil {
return nil, fmt.Errorf("JSON parsing error: %v in %s", err, path.GoString())
}
v, err := convertStructuredDataToStarlark(decodedJSON)
if err != nil {
return nil, fmt.Errorf("error converting JSON to Starlark: %v in %s", err, path.GoString())
}
return v, nil
}
func convertStructuredDataToStarlark(j interface{}) (starlark.Value, error) {
switch j := j.(type) {
case bool:
return starlark.Bool(j), nil
case string:
return starlark.String(j), nil
case float64:
return starlark.Float(j), nil
case []interface{}:
listOfValues := []starlark.Value{}
for _, v := range j {
convertedValue, err := convertStructuredDataToStarlark(v)
if err != nil {
return nil, err
}
listOfValues = append(listOfValues, convertedValue)
}
return starlark.NewList(listOfValues), nil
case map[string]interface{}:
mapOfValues := &starlark.Dict{}
for k, v := range j {
convertedValue, err := convertStructuredDataToStarlark(v)
if err != nil {
return nil, err
}
err = mapOfValues.SetKey(starlark.String(k), convertedValue)
if err != nil {
return nil, err
}
}
return mapOfValues, nil
case nil:
return starlark.None, nil
}
return nil, errors.New(fmt.Sprintf("Unable to convert json to starlark value, unexpected type %T", j))
}