159 lines
3.6 KiB
Go
159 lines
3.6 KiB
Go
package main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"github.com/joho/godotenv"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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kaniko "github.com/drone/drone-kaniko"
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)
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const (
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// GCR JSON key file path
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gcrKeyPath string = "/kaniko/config.json"
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gcrEnvVariable string = "GOOGLE_APPLICATION_CREDENTIALS"
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)
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var (
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version = "unknown"
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)
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func main() {
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// Load env-file if it exists first
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if env := os.Getenv("PLUGIN_ENV_FILE"); env != "" {
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godotenv.Load(env)
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}
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app := cli.NewApp()
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app.Name = "kaniko gcr plugin"
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app.Usage = "kaniko gcr plugin"
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app.Action = run
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app.Version = version
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "dockerfile",
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Usage: "build dockerfile",
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Value: "Dockerfile",
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EnvVar: "PLUGIN_DOCKERFILE",
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},
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cli.StringFlag{
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Name: "context",
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Usage: "build context",
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Value: ".",
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EnvVar: "PLUGIN_CONTEXT",
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},
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cli.StringSliceFlag{
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Name: "tags",
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Usage: "build tags",
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Value: &cli.StringSlice{"latest"},
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EnvVar: "PLUGIN_TAGS",
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FilePath: ".tags",
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},
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cli.StringSliceFlag{
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Name: "args",
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Usage: "build args",
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EnvVar: "PLUGIN_BUILD_ARGS",
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},
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cli.StringFlag{
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Name: "target",
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Usage: "build target",
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EnvVar: "PLUGIN_TARGET",
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},
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cli.StringFlag{
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Name: "repo",
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Usage: "gcr repository",
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EnvVar: "PLUGIN_REPO",
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},
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cli.StringSliceFlag{
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Name: "custom-labels",
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Usage: "additional k=v labels",
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EnvVar: "PLUGIN_CUSTOM_LABELS",
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},
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cli.StringFlag{
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Name: "registry",
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Usage: "gcr registry",
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Value: "gcr.io",
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EnvVar: "PLUGIN_REGISTRY",
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},
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cli.StringFlag{
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Name: "json-key",
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Usage: "docker username",
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EnvVar: "PLUGIN_JSON_KEY",
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},
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cli.StringFlag{
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Name: "snapshot-mode",
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Usage: "Specify one of full, redo or time as snapshot mode",
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EnvVar: "PLUGIN_SNAPSHOT_MODE",
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},
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cli.BoolFlag{
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Name: "enable-cache",
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Usage: "Set this flag to opt into caching with kaniko",
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EnvVar: "PLUGIN_ENABLE_CACHE",
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},
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cli.StringFlag{
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Name: "cache-repo",
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Usage: "Remote repository that will be used to store cached layers. Cache repo should be present in specified registry. enable-cache needs to be set to use this flag",
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EnvVar: "PLUGIN_CACHE_REPO",
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},
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cli.IntFlag{
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Name: "cache-ttl",
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Usage: "Cache timeout in hours. Defaults to two weeks.",
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EnvVar: "PLUGIN_CACHE_TTL",
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},
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}
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if err := app.Run(os.Args); err != nil {
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logrus.Fatal(err)
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}
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}
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func run(c *cli.Context) error {
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err := setupGCRAuth(c.String("json-key"))
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if err != nil {
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return err
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}
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if c.String("repo") == "" {
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return fmt.Errorf("repo must be specified")
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}
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plugin := kaniko.Plugin{
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Build: kaniko.Build{
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Dockerfile: c.String("dockerfile"),
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Context: c.String("context"),
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Tags: c.StringSlice("tags"),
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Args: c.StringSlice("args"),
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Target: c.String("target"),
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Repo: fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
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Labels: c.StringSlice("custom-labels"),
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SnapshotMode: c.String("snapshot-mode"),
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EnableCache: c.Bool("enable-cache"),
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CacheRepo: fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
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CacheTTL: c.Int("cache-ttl"),
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},
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}
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return plugin.Exec()
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}
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func setupGCRAuth(jsonKey string) error {
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if jsonKey == "" {
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return fmt.Errorf("GCR JSON key must be specified")
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}
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err := ioutil.WriteFile(gcrKeyPath, []byte(jsonKey), 0644)
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if err != nil {
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return errors.Wrap(err, "failed to write GCR JSON key")
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}
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err = os.Setenv(gcrEnvVariable, gcrKeyPath)
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if err != nil {
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return errors.Wrap(err, fmt.Sprintf("failed to set %s environment variable", gcrEnvVariable))
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}
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return nil
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}
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