initial commit (ported from kfind)

.dockerignore

@@ -0,0 +1 @@
+Makefile

.gitignore

@@ -0,0 +1 @@
+/kfilt

Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.12-alpine3.9 as builder
+
+RUN apk --no-cache add make git gcc musl-dev && rm -rf /var/cache/apk/*
+WORKDIR /go/src/github.com/ryane/kfilt
+RUN GO111MODULE=off go get github.com/ahmetb/govvv
+ENV GO111MODULE=on
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
+COPY . .
+RUN govvv install -pkg github.com/ryane/kfilt/cmd
+
+FROM alpine:3.9
+RUN apk --no-cache add ca-certificates && rm -rf /var/cache/apk/*
+COPY --from=builder /go/bin/kfilt /bin/kfilt
+ENTRYPOINT ["/bin/kfilt"]

Makefile

@@ -0,0 +1,20 @@
+VERSION ?= $(shell cat VERSION)
+GIT_DIRTY = $(shell test -n "`git status --porcelain`" && echo "-dirty")
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: deps
+	govvv build -pkg github.com/ryane/kfilt/cmd
+
+.PHONY: docker
+docker:
+	docker build -t ryane/kfilt:${VERSION}${GIT_DIRTY} .
+
+push: build
+	docker push ryane/kfilt:${VERSION}${GIT_DIRTY}
+
+.PHONY: deps
+deps:
+	GO111MODULE=off go get github.com/ahmetb/govvv

README.md

@@ -0,0 +1,3 @@
+# kfilt
+
+kfilt can filter Kubernetes resources.

VERSION

@@ -0,0 +1 @@
+0.0.2

cmd/root.go

@@ -0,0 +1,89 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/ryane/kfilt/pkg/decoder"
+	"github.com/ryane/kfilt/pkg/filter"
+	"github.com/ryane/kfilt/pkg/printer"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+type root struct {
+	kind     string
+	name     string
+	filename string
+}
+
+func newRootCommand(args []string) *cobra.Command {
+	root := &root{}
+	rootCmd := &cobra.Command{
+		Use:   "kfilt",
+		Short: "kfilt can filter Kubernetes resources",
+		Long:  `kfilt can filter Kubernetes resources`,
+		Run: func(cmd *cobra.Command, args []string) {
+			if err := root.run(); err != nil {
+				log.WithError(err).Error()
+				os.Exit(1)
+			}
+		},
+	}
+
+	rootCmd.Flags().StringVarP(&root.kind, "kind", "k", "", "Only include resources of kind")
+	rootCmd.Flags().StringVarP(&root.name, "name", "n", "", "Only include resources of name")
+	rootCmd.Flags().StringVarP(&root.filename, "filename", "f", "", "Read manifests from file")
+
+	rootCmd.AddCommand(newVersionCommand())
+
+	return rootCmd
+}
+
+func (r *root) run() error {
+	var (
+		in  []byte
+		err error
+	)
+
+	// get input
+	if r.filename != "" {
+		in, err = ioutil.ReadFile(r.filename)
+		if err != nil {
+			return errors.Wrap(err, fmt.Sprintf("failed to read file %q", r.filename))
+		}
+	} else {
+		in, err = ioutil.ReadAll(os.Stdin)
+		if err != nil {
+			return errors.Wrap(err, "failed to read stdin")
+		}
+	}
+
+	// decode
+	results, err := decoder.New().Decode(in)
+	if err != nil {
+		return err
+	}
+
+	// filter
+	filtered := filter.New(
+		filter.KindMatcher([]string{r.kind}),
+		filter.NameMatcher([]string{r.name}),
+	).Filter(results)
+
+	// print
+	if err := printer.New().Print(filtered); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func Execute(args []string) {
+	if err := newRootCommand(args).Execute(); err != nil {
+		log.WithError(err).Error()
+		os.Exit(2)
+	}
+}

cmd/version.go

@@ -0,0 +1,24 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var GitCommit, GitState, Version string
+
+func newVersionCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Display the kfilt version",
+		Run: func(cmd *cobra.Command, args []string) {
+
+			if GitState != "clean" {
+				fmt.Printf("%s (%s-%s)\n", Version, GitCommit, GitState)
+			} else {
+				fmt.Printf("%s (%s)\n", Version, GitCommit)
+			}
+		},
+	}
+}

go.mod

@@ -0,0 +1,11 @@
+module github.com/ryane/kfilt
+
+go 1.12
+
+require (
+	github.com/pkg/errors v0.8.1
+	github.com/sirupsen/logrus v1.4.1
+	github.com/spf13/cobra v0.0.5
+	gopkg.in/yaml.v2 v2.2.2
+	k8s.io/apimachinery v0.0.0-20190612125636-6a5db36e93ad
+)

go.sum

@@ -0,0 +1,92 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"os"
+
+	"github.com/ryane/kfilt/cmd"
+)
+
+func main() {
+	cmd.Execute(os.Args[1:])
+}

pkg/decoder/decoder.go

@@ -0,0 +1,41 @@
+package decoder
+
+import (
+	"bytes"
+	"github.com/pkg/errors"
+	"io"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	k8syaml "k8s.io/apimachinery/pkg/util/yaml"
+)
+
+type Decoder interface {
+	Decode([]byte) ([]unstructured.Unstructured, error)
+}
+
+type kubernetesDecoder struct{}
+
+func New() Decoder {
+	return &kubernetesDecoder{}
+}
+
+func (k *kubernetesDecoder) Decode(in []byte) ([]unstructured.Unstructured, error) {
+	var (
+		result []unstructured.Unstructured
+		err    error
+	)
+
+	decoder := k8syaml.NewYAMLOrJSONDecoder(bytes.NewReader(in), 1024)
+
+	for err == nil {
+		var out unstructured.Unstructured
+		err = decoder.Decode(&out)
+		if err == nil {
+			result = append(result, out)
+		}
+	}
+	if err != io.EOF {
+		return nil, errors.Wrap(err, "failed to decode input")
+	}
+
+	return result, nil
+}

pkg/decoder/decoder_test.go

@@ -0,0 +1,51 @@
+package decoder_test
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/ryane/kfilt/pkg/decoder"
+)
+
+func TestDecoder(t *testing.T) {
+	// load test data
+	file := "./test.yaml"
+	in, err := ioutil.ReadFile(file)
+	if err != nil {
+		t.Errorf("error loading test data: %v", err)
+		t.FailNow()
+	}
+
+	// decode
+	d := decoder.New()
+	results, err := d.Decode(in)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+		t.FailNow()
+	}
+
+	expectedCount := 5
+	if len(results) != expectedCount {
+		t.Errorf("expected %d results, got %d", expectedCount, len(results))
+		t.FailNow()
+	}
+
+	expectNames := []string{"test", "test2", "example-config", "cluster-specification", "handler"}
+	for i, u := range results {
+		name := u.GetName()
+		if name != expectNames[i] {
+			t.Errorf("expected %s, got %s", expectNames[i], name)
+			t.FailNow()
+		}
+	}
+
+	expectKinds := []string{"ServiceAccount", "ServiceAccount", "ConfigMap", "ClusterSpec", "stdio"}
+	for i, u := range results {
+		kind := u.GetKind()
+		if kind != expectKinds[i] {
+			t.Errorf("expected %s, got %s", expectKinds[i], kind)
+			t.FailNow()
+		}
+	}
+}