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package cmd |
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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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"net/url" |
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"github.com/spf13/cobra" |
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"github.com/spf13/viper" |
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"google.golang.org/protobuf/encoding/protojson" |
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"github.com/Permify/permify/internal/schema" |
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"github.com/Permify/permify/pkg/cmd/flags" |
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"github.com/Permify/permify/pkg/development/file" |
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) |
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// NewGenerateASTCommand creates a new cobra.Command to generate the Abstract Syntax Tree (AST) from a given file. |
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// The command expects exactly one argument, which is the URL or path to the file. |
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// It also allows for flags registration for further validation (like coverage flags). |
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func NewGenerateAstCommand() *cobra.Command { |
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command := &cobra.Command{ |
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Use: "ast <file>", |
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Short: "Generates the AST from a specified file and prints it as JSON.", |
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RunE: runGenerateAst(), |
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Args: cobra.ExactArgs(1), |
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} |
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f := command.Flags() |
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f.Bool("pretty", false, "If set to true, produces a human-readable output of the AST.") |
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command.PreRun = func(cmd *cobra.Command, args []string) { |
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flags.RegisterAstFlags(f) |
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} |
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return command |
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} |
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// runGenerateAST creates a closure that generates the AST and returns its JSON representation. |
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// Depending on the "pretty" flag, the output can be either pretty-printed or raw. |
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func runGenerateAst() func(cmd *cobra.Command, args []string) error { |
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return func(cmd *cobra.Command, args []string) error { |
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// Fetch the value of the "pretty" flag. |
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pretty := viper.GetBool("pretty") |
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// Parse the provided URL. |
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u, err := url.Parse(args[0]) |
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if err != nil { |
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return err |
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} |
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// Initialize a decoder for the provided URL. |
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decoder, err := file.NewDecoderFromURL(u) |
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if err != nil { |
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return err |
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} |
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// Initialize an empty shape to store the decoded schema. |
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s := &file.Shape{} |
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// Decode the content from the URL into the shape. |
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err = decoder.Decode(s) |
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if err != nil { |
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return err |
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} |
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// Convert the string definitions in the shape to a structured schema. |
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def, err := schema.NewSchemaFromStringDefinitions(true, s.Schema) |
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if err != nil { |
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return err |
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} |
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// Serialize the schema definition into JSON. |
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jsonData, err := protojson.Marshal(def) |
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if err != nil { |
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return err |
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} |
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// Print the JSON, either prettified or raw based on the "pretty" flag. |
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if pretty { |
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var prettyJSON bytes.Buffer |
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err = json.Indent(&prettyJSON, jsonData, "", " ") |
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if err != nil { |
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return err |
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} |
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fmt.Println(prettyJSON.String()) |
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} else { |
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fmt.Println(string(jsonData)) |
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} |
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return nil |
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} |
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} |
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Permify /
permify
