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8c41ff539a
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/2581 Co-authored-by: Aravind K P <8335904+scriptonist@users.noreply.github.com> GitOrigin-RevId: 327c26868102ea1c277b795b9f508847faa2ae8b
199 lines
5.9 KiB
Go
199 lines
5.9 KiB
Go
package commands
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"os"
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"strings"
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goyaml "github.com/goccy/go-yaml"
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diffpkg "github.com/hasura/graphql-engine/cli/v2/internal/diff"
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"github.com/hasura/graphql-engine/cli/v2/internal/projectmetadata"
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"github.com/pkg/errors"
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"github.com/aryann/difflib"
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"github.com/hasura/graphql-engine/cli/v2"
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"github.com/mgutz/ansi"
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"github.com/spf13/cobra"
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v2yaml "gopkg.in/yaml.v2"
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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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Args []string
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DiffType string
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DisableColor bool
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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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opts := &MetadataDiffOptions{
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EC: ec,
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Output: ec.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, it shows changes between the 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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# Apply admin secret for Hasura GraphQL engine:
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hasura metadata diff --admin-secret "<admin-secret>"
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# Specify a diff type
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hasura metadata diff --type "unified-json"
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hasura metadata diff --type "json"
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# Diff metadata on a different Hasura instance:
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hasura metadata diff --endpoint "<endpoint>"`,
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Args: cobra.MaximumNArgs(2),
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.Args = args
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opts.DisableColor = ec.NoColor
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return opts.Run()
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},
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}
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f := metadataDiffCmd.Flags()
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f.StringVar(&opts.DiffType, "type", "", fmt.Sprintf(`specify a type of diff [allowed values: %v, %v, %v]`, DifftypeUnifiedJSON, DifftypeYAML, DifftypeJSON))
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return metadataDiffCmd
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}
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func (o *MetadataDiffOptions) Run() error {
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if o.EC.Config.Version >= cli.V2 && o.EC.MetadataDir != "" {
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return getMetadataModeHandler(o.EC.MetadataMode).Diff(o)
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} else {
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return fmt.Errorf("metadata diff for config %d not supported", o.EC.Config.Version)
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}
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}
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type DiffType string
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const DifftypeUnifiedJSON DiffType = "unified-json"
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const DifftypeYAML DiffType = "yaml"
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const DifftypeJSON DiffType = "json"
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const zeroDifferencesFound = "zero differences found"
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type printGeneratedMetadataFileDiffOpts struct {
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projectMetadataHandler *projectmetadata.Handler
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// actual directory paths to project directory
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fromProjectDirectory string
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toProjectDirectory string
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// friendly names if any to both from and to directories
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// for example the diff can between the current project directory and server
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fromFriendlyName string
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toFriendlyName string
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disableColor bool
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diffType DiffType
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metadataMode cli.MetadataMode
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writer io.Writer
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ec *cli.ExecutionContext
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}
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func printGeneratedMetadataFileDiffBetweenProjectDirectories(opts printGeneratedMetadataFileDiffOpts) error {
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// build server metadata
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opts.projectMetadataHandler.SetMetadataObjects(projectmetadata.GetMetadataObjectsWithDir(opts.ec, opts.toProjectDirectory))
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serverMeta, err := opts.projectMetadataHandler.BuildMetadata()
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if err != nil {
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return err
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}
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newYaml, err := v2yaml.Marshal(serverMeta)
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if err != nil {
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return errors.Wrap(err, "cannot unmarshall server metadata")
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}
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opts.projectMetadataHandler.SetMetadataObjects(projectmetadata.GetMetadataObjectsWithDir(opts.ec, opts.fromProjectDirectory))
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localMeta, err := opts.projectMetadataHandler.BuildMetadata()
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if err != nil {
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return err
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}
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oldYaml, err := v2yaml.Marshal(localMeta)
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if err != nil {
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return errors.Wrap(err, "cannot unmarshal local metadata")
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}
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switch opts.diffType {
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case DifftypeJSON:
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newJson, err := goyaml.YAMLToJSON(newYaml)
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if err != nil {
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return fmt.Errorf("cannot unmarshal local metadata to json: %w", err)
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}
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oldJson, err := goyaml.YAMLToJSON(oldYaml)
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if err != nil {
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return fmt.Errorf("cannot unmarshal server metadata to json: %w", err)
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}
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var newJsonBuf, oldJsonBuf bytes.Buffer
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err = json.Indent(&newJsonBuf, newJson, "", " ")
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if err != nil {
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return fmt.Errorf("cannot indent server localmetadata to json: %w", err)
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}
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err = json.Indent(&oldJsonBuf, oldJson, "", " ")
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if err != nil {
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return fmt.Errorf("cannot indent server metadata to json: %w", err)
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}
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return printMyersDiff(string(newYaml), string(oldYaml), opts.toFriendlyName, opts.fromFriendlyName, opts.writer, opts.disableColor)
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case DifftypeYAML:
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return printMyersDiff(string(newYaml), string(oldYaml), opts.toFriendlyName, opts.fromFriendlyName, opts.writer, opts.disableColor)
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case DifftypeUnifiedJSON:
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printUnifiedJSONDiff(string(newYaml), string(oldYaml), opts.writer)
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}
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return nil
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}
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func printMyersDiff(before, after, from, to string, writer io.Writer, disableColor bool) error {
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fmt.Fprintf(writer, "- %s\n", diffpkg.MakeDiffLine(from, "red", disableColor))
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fmt.Fprintf(writer, "+ %s\n", diffpkg.MakeDiffLine(to, "green", disableColor))
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count, err := diffpkg.MyersDiff(before, after, from, to, writer, disableColor)
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if err != nil {
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return err
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}
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if count == 0 {
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fmt.Fprintln(writer, zeroDifferencesFound)
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}
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return nil
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}
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func printUnifiedJSONDiff(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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func checkDir(path string) error {
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file, err := os.Stat(path)
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if err != nil {
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return err
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}
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if !file.IsDir() {
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return fmt.Errorf("metadata diff only works with folder but got file %s", path)
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}
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return nil
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}
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