diff --git a/kustomize-fns/.gitignore b/kustomize-fns/.gitignore new file mode 100644 index 000000000..b2d056253 --- /dev/null +++ b/kustomize-fns/.gitignore @@ -0,0 +1,3 @@ +# Prevent people from checking in the result of go build ./ +kustomize-fns +remove-namespace/remove-namespace \ No newline at end of file diff --git a/kustomize-fns/Dockerfile b/kustomize-fns/Dockerfile new file mode 100644 index 000000000..e43d2e082 --- /dev/null +++ b/kustomize-fns/Dockerfile @@ -0,0 +1,21 @@ +# Copyright 2019 The Kubernetes Authors. +# SPDX-License-Identifier: Apache-2.0 + +# TODO(jlewi): We end up pulling go.mod for all of kfctl which pulls in a lot of dependencies +# which slows down builds. That's pretty unnecessary. The only code shared with kfctl is +# some test utilities in particular utils.PrintDiff it might be worthmaking the test package +# its own go module so we don't have to pull in so many dependencies just to build +# our kustomize functions. + +FROM golang:1.13-stretch +ENV CGO_ENABLED=0 +WORKDIR /go/src/ +COPY go.mod . +COPY go.sum . +RUN go mod download +COPY . . +RUN go build -v -o /usr/local/bin/config-function ./ + +FROM alpine:latest +COPY --from=0 /usr/local/bin/config-function /usr/local/bin/config-function +CMD ["config-function"] diff --git a/kustomize-fns/OWNERS b/kustomize-fns/OWNERS index 7f04d2eba..8e3c10e33 100644 --- a/kustomize-fns/OWNERS +++ b/kustomize-fns/OWNERS @@ -1,3 +1,2 @@ - approvers: - jlewi diff --git a/kustomize-fns/README.md b/kustomize-fns/README.md index 707ed7b2d..028637cff 100644 --- a/kustomize-fns/README.md +++ b/kustomize-fns/README.md @@ -1,13 +1,78 @@ -# Kustomize FNs +# kpt/kustomize FNs -This directory contains kustomize functions ala -https://github.com/kubernetes-sigs/kustomize/tree/master/functions/examples/injection-tshirt-sizes +This directory contains [kpt functions](https://googlecontainertools.github.io/kpt/reference/fn/) +for apply various transformations to your YAMLs. -Functions are away to define custom transformations -that can be applied via kustomize. +These kustomizations are intended to be applied using kpt. It looks like support for functions +is being upstreamed into kustomize and currently has alpha support. -## Warning this is experimental +## Usage -The use of kustomize functions is still experimental. +The [kpt docs](https://googlecontainertools.github.io/kpt/reference/fn/run/#examples) describe +many ways to invoke kpt functions. For production the most common use will be the +[declarative method](https://googlecontainertools.github.io/kpt/reference/fn/run/#declaratively-run-one-or-more-functions). -The use of kustomize functions is still considered Alpha in kustomize. \ No newline at end of file +1. In the directory you want to apply the transform define a config specifying the transform + + * Depending on the transform this will either be a [ConfigMap](https://googlecontainertools.github.io/kpt/reference/fn/run/#declaratively-run-one-or-more-functions) + or a custom resource + + * In both cases the annotation `config.kubernetes.io/function` specifies the + docker image to use for the config. + + * As an example for the image prefix transform we define a config like the following + + ``` + apiVersion: v1alpha1 # Define a transform to change all the image prefixes to use images from a different registry + kind: ImagePrefix + metadata: + name: use-mirror-images-gcr + annotations: + config.kubernetes.io/function: | + container: + image: gcr.io/kubeflow-images-public/kpt-fns:v1.0-rc.3-58-g616f986-dirty + spec: + imageMappings: + - src: quay.io/jetstack + dest: gcr.io/gcp-private-dev/jetstack # {"type":"string","x-kustomize":{"setBy":"kpt","partialSetters":[{"name":"gcloud.core.project","value":"gcp-private-dev"}]}} + - src: gcr.io/kubeflow-images-public + dest: gcr.io/gcp-private-dev # {"type":"string","x-kustomize":{"setBy":"kpt","partialSetters":[{"name":"gcloud.core.project","value":"gcp-private-dev"}]}} + ``` + +1. Run kpt fn + + ``` + kpt fn ${DIR} + ``` + + * ${DIR} will be the directory containing the YAML files to process and should include + the YAMLs configuring the functions + +## Development + +During development it can be useful to run your transforms without building a docker image or +run them in a debugger. + +To support this our main binary `kustomize-fns` includes a `debug` subcommand which +allows you to specify the path of a YAML file containing a `ResourceList` defining +the resources and functions to apply. You can produce that file using kpt; e.g. + +``` + kpt fn source ${DIR} --function-config=${FN_CFG} +``` + + * *DIR* should be the directory containing the YAML files defining the resources to process + * *FN_CFG* should be a path to a YAML file specifying one or more functions to apply + + +You can use skaffold to build the docker image + +``` +skaffold build --kube-context=${KUBE_CONTEXT} +``` + +You can build the binary by doing + +``` +go build . +``` diff --git a/kustomize-fns/go.mod b/kustomize-fns/go.mod new file mode 100644 index 000000000..d9609ae39 --- /dev/null +++ b/kustomize-fns/go.mod @@ -0,0 +1,10 @@ +module github.com/kubeflow/kfctl/kustomize-fns + +go 1.13 + +require ( + github.com/pkg/errors v0.8.0 + github.com/spf13/cobra v1.0.0 + k8s.io/apimachinery v0.18.3 + sigs.k8s.io/kustomize/kyaml v0.1.13 +) diff --git a/kustomize-fns/go.sum b/kustomize-fns/go.sum new file mode 100644 index 000000000..51f9b8807 --- /dev/null +++ b/kustomize-fns/go.sum @@ -0,0 +1,320 @@ 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It works by adding an annotation +which is a map of prefixes: e.g. + +``` +annotations: + "image-prefix.kubeflow.org": '{"docker.io": "gcr.io/myproject"}' +``` + +The transform will then look for all images in that resource with prefix docker.io and change +it to gcr.io/myproject. + +In practice you will typically add the annotation using kustomize's commonAnnotations +transform. diff --git a/kustomize-fns/image-prefix/function.go b/kustomize-fns/image-prefix/function.go new file mode 100644 index 000000000..aeb204f4b --- /dev/null +++ b/kustomize-fns/image-prefix/function.go @@ -0,0 +1,146 @@ +// Package image_prefix implements a kustomize function for changing image prefixes +package image_prefix + +import ( + "fmt" + utilerrors "k8s.io/apimachinery/pkg/util/errors" + "os" + "sigs.k8s.io/kustomize/kyaml/kio" + "strings" + + "sigs.k8s.io/kustomize/kyaml/yaml" +) + +const ( + prefixAnnotation = "image-prefix.kubeflow.org" +) + +const ( + Kind = "ImagePrefix" + APIVersion = "kubeflow.org/v1alpha1" +) + +var _ kio.Filter = &ImagePrefixFunction{} + +// Filter returns a new ImagePrefixFunction +func Filter() kio.Filter { + return &ImagePrefixFunction{} +} + +// ImagePrefixFunction implements the ImagePrefix Function +type ImagePrefixFunction struct { + // Kind is the API name. Must be ImagePrefix. + Kind string `yaml:"kind"` + + // APIVersion is the API version. Must be examples.kpt.dev/v1alpha1 + APIVersion string `yaml:"apiVersion"` + + // Metadata defines instance metadata. + Metadata Metadata `yaml:"metadata"` + + // Spec defines the desired declarative configuration. + Spec Spec `yaml:"spec"` +} + +type Metadata struct { + // Name is the name of the ImagePrefix Resources + Name string `yaml:"name"` + + // Namespace is the namespace of the ImagePrefix Resources + Namespace string `yaml:"namespace"` + + // Labels are labels applied to the ImagePrefix Resources + Labels map[string]string `yaml:"labels"` + + // Annotations are annotations applied to the ImagePrefix Resources + Annotations map[string]string `yaml:"annotations"` +} + +type Spec struct { + ImageMappings []*ImageMapping `yaml:"imageMappings"` +} + +type ImageMapping struct { + Src string `yaml: src` + Dest string `yaml: dest` +} + +func (f *ImagePrefixFunction) init() error { + if f.Metadata.Name == "" { + return fmt.Errorf("must specify ImagePrefix name") + } + + if f.Metadata.Labels == nil { + f.Metadata.Labels = map[string]string{} + } + + if f.Spec.ImageMappings == nil { + f.Spec.ImageMappings = []*ImageMapping{} + } + return nil +} + +// Filter looks for images with the specified prefixes and replaces them. +func (f *ImagePrefixFunction) Filter(inputs []*yaml.RNode) ([]*yaml.RNode, error) { + if err := f.init(); err != nil { + return nil, err + } + + errors := []error{} + + for _, r := range inputs { + if err := f.replaceImage(r); err !=nil { + errors = append(errors, err) + } + } + return inputs, utilerrors.NewAggregate(errors) +} + +// replaceImage looks for an annotation changing docker image prefixes and if it is present +// applies it to all the images. +func (f *ImagePrefixFunction) replaceImage(r *yaml.RNode) error { + m , _ := r.GetMeta() + fmt.Fprintf(os.Stderr, "Meta %+v",m) + // lookup the containers field + containers, err := r.Pipe(yaml.Lookup("spec", "template", "spec", "containers")) + if err != nil { + s, _ := r.String() + return fmt.Errorf("%v: %s", err, s) + } + + if containers == nil { + // doesn't have containers, skip the Resource + return nil + } + + // visit each container and apply the cpu and memory reservations + return containers.VisitElements(func(node *yaml.RNode) error { + image := node.Field("image").Value.YNode().Value + + newImage := "" + + for _, m := range f.Spec.ImageMappings { + if strings.HasPrefix(image, m.Src) { + newImage = m.Dest + image[len(m.Src):len(image)] + break + } + } + + if newImage == "" { + return nil + } + + // set image + err := node.PipeE( + // lookup resources.requests.cpu, creating the field as a + // ScalarNode if it doesn't exist + yaml.LookupCreate(yaml.ScalarNode, "image"), + // set the field value to the cpuSize + yaml.Set(yaml.NewScalarRNode(newImage))) + if err != nil { + s, _ := r.String() + return fmt.Errorf("%v: %s", err, s) + } + return nil + }) +} \ No newline at end of file diff --git a/kustomize-fns/image-prefix/function_test.go b/kustomize-fns/image-prefix/function_test.go new file mode 100644 index 000000000..8b4404ea2 --- /dev/null +++ b/kustomize-fns/image-prefix/function_test.go @@ -0,0 +1,139 @@ +package image_prefix + +import ( + "bytes" + "github.com/kubeflow/kfctl/kustomize-fns/utils" + "github.com/pkg/errors" + "io/ioutil" + "os" + "path" + "sigs.k8s.io/kustomize/kyaml/kio" + "sigs.k8s.io/kustomize/kyaml/yaml" + "testing" +) + +func readYaml(path string) ([]*yaml.RNode, error) { + data, err := ioutil.ReadFile(path) + if err != nil { + return nil, errors.Wrapf(err, "Error reading path %v", path) + } + + input := bytes.NewReader(data) + reader := kio.ByteReader{ + Reader: input, + // We need to disable adding reader annotations because + // we want to run some checks about whether annotations are set and + // adding those annotations interferes with that. + OmitReaderAnnotations: true, + } + + nodes, err := reader.Read() + + if err != nil { + return nil, errors.Wrapf(err, "Error unmarshaling %v", path) + } + + return nodes, nil +} + +func writeYaml(nodes []*yaml.RNode) ([]byte, error) { + var b bytes.Buffer + writer := kio.ByteWriter{ + Writer: &b, + } + + if err := writer.Write(nodes); err != nil { + return []byte{}, err + } + + return b.Bytes(), nil +} + +func Test_replace_image(t *testing.T) { + + type testCase struct { + InputFile string + ExpectedFile string + } + + cwd, err := os.Getwd() + + if err != nil { + t.Fatalf("Error getting current directory; error %v", err) + } + + testDir := path.Join(cwd, "test_data") + + cases := []testCase{ + { + InputFile: path.Join(testDir, "input.yaml"), + ExpectedFile: path.Join(testDir, "expected.yaml"), + }, + } + + f := &ImagePrefixFunction { + Spec: Spec{ + ImageMappings: []*ImageMapping { + {Src: "quay.io/jetstack", + Dest: "gcr.io/myproject", + + }, + { + Src: "docker.io/kubeflow", + Dest: "gcr.io/project2", + }, + }, + }, + } + + for _, c := range cases { + nodes, err := readYaml(c.InputFile) + + if err != nil { + t.Errorf("Error reading YAML: %v", err) + } + + if len(nodes) != 1 { + t.Errorf("Expected 1 node in file %v", c.InputFile) + } + node := nodes[0] + + err = f.replaceImage(node) + if err != nil { + t.Errorf("prefixImage failed; error %v", err) + continue + } + + b, err := writeYaml([]*yaml.RNode{node}) + + if err != nil { + t.Errorf("Error writing yaml; error %v", err) + continue + } + + actual := string(b) + + + // read the expected yaml and then rewrites using kio.ByteWriter. + // We do this because ByteWriter makes some formatting decisions and we + // we want to apply the same formatting to the expected values + + eNode, err := readYaml(c.ExpectedFile) + + if err != nil { + t.Errorf("Could not read expected file %v; error %v", c.ExpectedFile, err) + } + + eBytes, err := writeYaml(eNode) + + if err != nil { + t.Errorf("Could not format expected file %v; error %v", c.ExpectedFile, err) + } + + expected := string(eBytes) + + if actual != expected { + utils.PrintDiff(actual, expected) + } + } +} diff --git a/kustomize-fns/image-prefix/test_data/expected.yaml b/kustomize-fns/image-prefix/test_data/expected.yaml new file mode 100644 index 000000000..5cf697f09 --- /dev/null +++ b/kustomize-fns/image-prefix/test_data/expected.yaml @@ -0,0 +1,26 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + labels: + app: cert-manager + name: cert-manager + namespace: cert-manager +spec: + replicas: 1 + selector: + matchLabels: + app: cert-manager + mplate: + metadata: + labels: + app: cert-manager + template: + spec: + containers: + - image: gcr.io/myproject/cert-manager-controller:v0.11.0 + name: cert-manager + - image: gcr.io/project2/kf:v0.11.0 + name: myimage2 + - image: non/matching/image:1.0 + name: other + diff --git a/kustomize-fns/image-prefix/test_data/input.yaml b/kustomize-fns/image-prefix/test_data/input.yaml new file mode 100644 index 000000000..9111dc88f --- /dev/null +++ b/kustomize-fns/image-prefix/test_data/input.yaml @@ -0,0 +1,26 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + labels: + app: cert-manager + name: cert-manager + namespace: cert-manager +spec: + replicas: 1 + selector: + matchLabels: + app: cert-manager + mplate: + metadata: + labels: + app: cert-manager + template: + spec: + containers: + - image: quay.io/jetstack/cert-manager-controller:v0.11.0 + name: cert-manager + - image: docker.io/kubeflow/kf:v0.11.0 + name: myimage2 + - image: non/matching/image:1.0 + name: other + diff --git a/kustomize-fns/main.go b/kustomize-fns/main.go new file mode 100644 index 000000000..a1bd7b236 --- /dev/null +++ b/kustomize-fns/main.go @@ -0,0 +1,167 @@ +// Copyright 2019 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package main implements example kpt-functions +package main + +import ( + "bytes" + "fmt" + ip "github.com/kubeflow/kfctl/kustomize-fns/image-prefix" + "github.com/pkg/errors" + "github.com/spf13/cobra" + "io" + "io/ioutil" + "os" + "path/filepath" + "sigs.k8s.io/kustomize/kyaml/kio" + "sigs.k8s.io/kustomize/kyaml/kio/filters" + "sigs.k8s.io/kustomize/kyaml/yaml" +) + +var debugPath string + +func main() { + cmd := &cobra.Command{ + Use: "config-function", + SilenceUsage: true, // don't print usage on an error + RunE: RunE, + } + + // Add a debug command. Instead of taking resourceList as stdIn we will read it from a file. + // The resourceList can be created using kpt e.g + // kpt fn source ${DIR} --function-config=./${FUNCTION_CONFIG.YAML} > /tmp/stdin.yaml + // You can then run this in a debugger in order to debug. + debug := &cobra.Command{ + Use: "debug", + SilenceUsage: true, // don't print usage on an error + RunE: DebugRunE, + } + + debug.Flags().StringVarP(&debugPath, "file", "f", "", "Path to the file containing the resource list to process. This can be produced using kpt; e.g kpt fn source ${DIR} --function-config=./${FUNCTION_CONFIG.YAML}") + + cmd.AddCommand(debug) + + if err := cmd.Execute(); err != nil { + fmt.Fprintf(os.Stderr, "An error occurred running your function: %v\n", err) + os.Exit(1) + } +} + +// DebugRunE is the cobra entrypoint when running in debug mode. +func DebugRunE(_ *cobra.Command, _ []string) error { + data, readErr := ioutil.ReadFile(debugPath) + if readErr != nil { + return errors.Wrapf(readErr, "Error reading: %v", debugPath) + } + + input := bytes.NewReader(data) + + d := Dispatcher{} + + return d.run(input) +} + +// RunE is the cobra entrypoint when taking input from stdin +func RunE(_ *cobra.Command, _ []string) error { + d := Dispatcher{} + + return d.run(os.Stdin) +} + + +// Dispatcher dispatches to the matching API +type Dispatcher struct { + // IO hanldes reading / writing Resources + IO *kio.ByteReadWriter +} + +func (d *Dispatcher) run(input io.Reader) error { + d.IO = &kio.ByteReadWriter{ + Reader: input, + Writer: os.Stdout, + KeepReaderAnnotations: true, + } + + return kio.Pipeline{ + Inputs: []kio.Reader{d.IO}, + Filters: []kio.Filter{ + d, // invoke the API + &filters.MergeFilter{}, + &filters.FileSetter{FilenamePattern: filepath.Join("config", "%n.yaml")}, + &filters.FormatFilter{}, + }, + Outputs: []kio.Writer{d.IO}, + }.Execute() +} + +// dispatchTable maps configFunction Kinds to implementations +var dispatchTable = map[string]func() kio.Filter{ + ip.Kind: ip.Filter, +} + +func (d *Dispatcher) Filter(inputs []*yaml.RNode) ([]*yaml.RNode, error) { + // parse the API meta to find which API is being invoked + meta, err := d.IO.FunctionConfig.GetMeta() + if err != nil { + return nil, err + } + + if meta.Kind == "" { + fmt.Fprintf(os.Stderr, "Kind is empty; keep going: %v", meta) + return inputs, nil + } + fmt.Fprintf(os.Stderr, "Dispatching for meta: %v", meta) + fmt.Fprintf(os.Stderr, "Dispatching for kind: %v", meta.Kind) + // find the implementation for this API + fn := dispatchTable[meta.Kind] + if fn == nil { + return nil, fmt.Errorf("unsupported API type: %s", meta.Kind) + } + + // dispatch to the implementation + fltr := fn() + + // initializes the object from the config + if err := yaml.Unmarshal([]byte(d.IO.FunctionConfig.MustString()), fltr); err != nil { + fmt.Fprintf(os.Stderr, "%v\n", err) + fmt.Fprintf(os.Stderr, "%s\n", d.IO.FunctionConfig.MustString()) + os.Exit(1) + } + return fltr.Filter(inputs) +} + +// readYaml reads the specified path and returns an RNode. +func readYaml(path string) ([]*yaml.RNode, error) { + data, err := ioutil.ReadFile(path) + if err != nil { + return nil, errors.Wrapf(err, "Error reading path %v", path) + } + + input := bytes.NewReader(data) + reader := kio.ByteReader{ + Reader: input, + // We need to disable adding reader annotations because these should have already been added + // when we ran kpt fn source to produce the file. + OmitReaderAnnotations: true, + } + + nodes, err := reader.Read() + + if err != nil { + return nil, errors.Wrapf(err, "Error unmarshaling %v", path) + } + + return nodes, nil +} diff --git a/kustomize-fns/remove-namespace/main.go b/kustomize-fns/remove-namespace/main.go index 414509d9d..333849543 100644 --- a/kustomize-fns/remove-namespace/main.go +++ b/kustomize-fns/remove-namespace/main.go @@ -3,46 +3,49 @@ // Package main implements an injection function for resource reservations and // is run with `kustomize config run -- DIR/`. + +// TODO(https://github.com/kubeflow/gcp-blueprints/issues/27): We should make this configurable and follow +// the model of image-prefix. This means instead of using a separate main.go we should use kustomize-fns/main.go +// and just register this function in the dispatcher. package main import ( - -"fmt" -"os" -"sigs.k8s.io/kustomize/kyaml/fn/framework" -"sigs.k8s.io/kustomize/kyaml/yaml" -"strings" + "fmt" + "os" + "sigs.k8s.io/kustomize/kyaml/fn/framework" + "sigs.k8s.io/kustomize/kyaml/yaml" + "strings" ) type groupKind struct { Group string - Kind string + Kind string } var ( // List of clusterResources to match and remove namespace from. - // TODO(jlewi): How could we make this configurable? + // TODO(jlewi): How could we make this configurable? I think you want to put the relevant data + // into the YAML files that get processed by the transform. We could define an annotation and then + // the transform could look for any resource with this annotation and remove the namespace if it exists. clusterKinds = []groupKind{ { - Kind: "Profile", + Kind: "Profile", Group: "kubeflow.org", - }, { - Kind: "ClusterRbacConfig", + Kind: "ClusterRbacConfig", Group: "rbac.istio.io", }, { - Kind: "ClusterIssuer", + Kind: "ClusterIssuer", Group: "cert-manager.io", }, { - Kind: "CompositeController", + Kind: "CompositeController", Group: "metacontroller.k8s.io", }, } - ) func main() { @@ -70,7 +73,7 @@ func getGroup(apiVersion string) string { } // Strip the last piece as the version - pieces = pieces[0:len(pieces) -1 ] + pieces = pieces[0 : len(pieces)-1] return strings.Join(pieces, "/") } @@ -99,12 +102,10 @@ func removeNamespace(r *yaml.RNode) error { return nil } - return r.PipeE( yaml.LookupCreate(yaml.ScalarNode, "metadata"), - // set the field value to the cpuSize yaml.FieldClearer{ Name: "namespace", }, - ) + ) } diff --git a/kustomize-fns/remove-namespace/remove-namespace b/kustomize-fns/remove-namespace/remove-namespace deleted file mode 100755 index abcc7ac6b..000000000 Binary files a/kustomize-fns/remove-namespace/remove-namespace and /dev/null differ diff --git a/kustomize-fns/skaffold.yaml b/kustomize-fns/skaffold.yaml new file mode 100644 index 000000000..d35214157 --- /dev/null +++ b/kustomize-fns/skaffold.yaml @@ -0,0 +1,30 @@ +# Reference: https://skaffold.dev/docs/references/yaml/ +apiVersion: skaffold/v2alpha1 +kind: Config +metadata: + name: remove-namespace +build: + artifacts: + - image: gcr.io/kubeflow-images-public/kpt-fns + # Set the context to the root of the repo + # All paths in the Dockerfile should be relative to this one. + context: . + kaniko: + dockerfile: ./Dockerfile + buildContext: + gcsBucket: kubeflow-releasing_skaffold/ + env: + # TODO(GoogleContainerTools/skaffold#3468) skaffold doesn't + # appear to work with workload identity + - name: GOOGLE_APPLICATION_CREDENTIALS + value: /secret/user-gcp-sa.json + cache: {} + cluster: + pullSecretName: user-gcp-sa + # Build in the kaniko namespace because we need to disable ISTIO sidecar injection + # see GoogleContainerTools/skaffold#3442 + namespace: kf-releasing + resources: + requests: + cpu: 8 + memory: 16Gi \ No newline at end of file diff --git a/kustomize-fns/utils/diff.go b/kustomize-fns/utils/diff.go new file mode 100644 index 000000000..fc2f9f613 --- /dev/null +++ b/kustomize-fns/utils/diff.go @@ -0,0 +1,70 @@ +package utils + +// N.B diff.go is potentially duplicating some code in pkg/utils. The reason for this is because +// we wanted to have kustomize-fns and kfctl be separate go modules to speed up builds of kustomize-fns. +// The code duplication is small enough that it wasn't worth refactoring utils into its own go module that could +// be reused by both. + +import ( + "fmt" + "strings" +) + +// PrintDiff pretty prints file differences. +func PrintDiff(actual string, expected string) { + sE, maxLen := convertToArray(expected) + sA, _ := convertToArray(actual) + format := fmt.Sprintf("%%s %%-%ds %%s\n", maxLen+4) + limit := 0 + if len(sE) < len(sA) { + limit = len(sE) + } else { + limit = len(sA) + } + fmt.Printf(format, " ", "EXPECTED", "ACTUAL") + fmt.Printf(format, " ", "--------", "------") + for i := 0; i < limit; i++ { + fmt.Printf(format, hint(sE[i], sA[i]), sE[i], sA[i]) + } + if len(sE) < len(sA) { + for i := len(sE); i < len(sA); i++ { + fmt.Printf(format, "X", "", sA[i]) + } + } else { + for i := len(sA); i < len(sE); i++ { + fmt.Printf(format, "X", sE[i], "") + } + } +} + +func tabToSpace(input string) string { + var result []string + for _, i := range input { + if i == 9 { + result = append(result, " ") + } else { + result = append(result, string(i)) + } + } + return strings.Join(result, "") +} + +func convertToArray(x string) ([]string, int) { + a := strings.Split(strings.TrimSuffix(x, "\n"), "\n") + maxLen := 0 + for i, v := range a { + z := tabToSpace(v) + if len(z) > maxLen { + maxLen = len(z) + } + a[i] = z + } + return a, maxLen +} + +func hint(a, b string) string { + if a == b { + return " " + } + return "X" +} diff --git a/prow_config.yaml b/prow_config.yaml index 3d4f25ff5..9932291b1 100644 --- a/prow_config.yaml +++ b/prow_config.yaml @@ -19,6 +19,7 @@ workflows: - config/* - cmd/* - pkg/* + - kustomize-fns/* - testing/* - py/* - py_func: kubeflow.kfctl.testing.ci.kfctl_e2e_workflow.create_workflow