mirror of
https://github.com/hasura/graphql-engine.git
synced 2024-12-14 17:02:49 +03:00
152 lines
4.2 KiB
Go
152 lines
4.2 KiB
Go
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package commands
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import (
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"strings"
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"github.com/aryann/difflib"
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"github.com/ghodss/yaml"
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"github.com/hasura/graphql-engine/cli"
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"github.com/mgutz/ansi"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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)
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type metadataDiffOptions struct {
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EC *cli.ExecutionContext
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output io.Writer
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// two metadata to diff, 2nd is server if it's empty
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metadata [2]string
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}
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func newMetadataDiffCmd(ec *cli.ExecutionContext) *cobra.Command {
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v := viper.New()
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opts := &metadataDiffOptions{
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EC: ec,
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output: os.Stdout,
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}
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metadataDiffCmd := &cobra.Command{
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Use: "diff [file1] [file2]",
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Short: "(PREVIEW) Show a highlighted diff of Hasura metadata",
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Long: `(PREVIEW) Show changes between two different sets of Hasura metadata.
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By default, shows changes between exported metadata file and server metadata.`,
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Example: ` # NOTE: This command is in preview, usage and diff format may change.
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# Show changes between server metadata and the exported metadata file:
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hasura metadata diff
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# Show changes between server metadata and that in local_metadata.yaml:
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hasura metadata diff local_metadata.yaml
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# Show changes between metadata from metadata.yaml and metadata_old.yaml:
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hasura metadata diff metadata.yaml metadata_old.yaml`,
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Args: cobra.MaximumNArgs(2),
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PreRunE: func(cmd *cobra.Command, args []string) error {
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ec.Viper = v
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return ec.Validate()
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},
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RunE: func(cmd *cobra.Command, args []string) error {
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messageFormat := "Showing diff between %s and %s..."
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message := ""
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switch len(args) {
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case 0:
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// no args, diff exported metadata and metadata on server
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filename, err := ec.GetExistingMetadataFile()
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if err != nil {
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return errors.Wrap(err, "failed getting metadata file")
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}
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opts.metadata[0] = filename
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message = fmt.Sprintf(messageFormat, filename, "the server")
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case 1:
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// 1 arg, diff given filename and the metadata on server
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opts.metadata[0] = args[0]
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message = fmt.Sprintf(messageFormat, args[0], "the server")
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case 2:
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// 2 args, diff given filenames
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opts.metadata[0] = args[0]
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opts.metadata[1] = args[1]
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message = fmt.Sprintf(messageFormat, args[0], args[1])
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}
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opts.EC.Logger.Info(message)
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err := opts.run()
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if err != nil {
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return errors.Wrap(err, "failed to show metadata diff")
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}
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return nil
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},
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}
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f := metadataDiffCmd.Flags()
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f.String("endpoint", "", "http(s) endpoint for Hasura GraphQL Engine")
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f.String("admin-secret", "", "admin secret for Hasura GraphQL Engine")
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f.String("access-key", "", "access key for Hasura GraphQL Engine")
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f.MarkDeprecated("access-key", "use --admin-secret instead")
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// need to create a new viper because https://github.com/spf13/viper/issues/233
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v.BindPFlag("endpoint", f.Lookup("endpoint"))
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v.BindPFlag("admin_secret", f.Lookup("admin-secret"))
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v.BindPFlag("access_key", f.Lookup("access-key"))
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return metadataDiffCmd
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}
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func (o *metadataDiffOptions) run() error {
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var oldYaml, newYaml []byte
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var err error
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migrateDrv, err := newMigrate(o.EC.MigrationDir, o.EC.ServerConfig.ParsedEndpoint, o.EC.ServerConfig.AdminSecret, o.EC.Logger, o.EC.Version, true)
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if err != nil {
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return err
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}
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if o.metadata[1] == "" {
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// get metadata from server
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m, err := migrateDrv.ExportMetadata()
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if err != nil {
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return errors.Wrap(err, "cannot fetch metadata from server")
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}
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newYaml, err = yaml.Marshal(m)
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if err != nil {
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return errors.Wrap(err, "cannot convert metadata from server to yaml")
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}
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} else {
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newYaml, err = ioutil.ReadFile(o.metadata[1])
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if err != nil {
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return errors.Wrap(err, "cannot read file")
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}
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}
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oldYaml, err = ioutil.ReadFile(o.metadata[0])
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if err != nil {
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return errors.Wrap(err, "cannot read file")
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}
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printDiff(string(oldYaml), string(newYaml), o.output)
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return nil
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}
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func printDiff(before, after string, to io.Writer) {
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diffs := difflib.Diff(strings.Split(before, "\n"), strings.Split(after, "\n"))
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for _, diff := range diffs {
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text := diff.Payload
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switch diff.Delta {
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case difflib.RightOnly:
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fmt.Fprintf(to, "%s\n", ansi.Color(text, "green"))
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case difflib.LeftOnly:
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fmt.Fprintf(to, "%s\n", ansi.Color(text, "red"))
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case difflib.Common:
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fmt.Fprintf(to, "%s\n", text)
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}
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}
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}
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