amendment cli utility can also use input file

x/gov/client/cli/tx.go

@@ -383,21 +383,24 @@ $ %s tx gov weighted-vote 1 yes=0.6,no=0.3,abstain=0.1 --from mykey
 // between the current constitution (queried) and the updated constitution
 // from the provided markdown file.
 func NewCmdGenerateConstitutionAmendment() *cobra.Command {
+	flagCurrentConstitution := "current-constitution"
+
 	cmd := &cobra.Command{
 		Use:   "generate-constitution-amendment [path/to/updated/constitution.md]",
 		Args:  cobra.ExactArgs(1),
 		Short: "Generate a constitution amendment proposal message",
 		Long: strings.TrimSpace(
 			fmt.Sprintf(`Generate a constitution amendment proposal message from the current
 constitution and the provided updated constitution.
-Queries the current constitution from the node and generates a
-valid constitution amendment proposal message containing the unified diff 
+Queries the current constitution from the node (unless --current-constitution is used) 
+and generates a valid constitution amendment proposal message containing the unified diff 
 between the current constitution and the updated constitution provided
 in a markdown file.
 
-NOTE: this is just a utility command, it is not able to generate or submit a valid Tx
-to submit on-chain. Use the 'tx gov submit-proposal' command in conjunction with the
-result of this one to submit the proposal.
+NOTE: this is just a utility command, it is not able to generate or 
+submit a valid Tx. Use the 'tx gov submit-proposal' command in 
+conjunction with the result of this one to submit the proposal.
+See also 'tx gov draft-proposal' for a more general proposal drafting tool.
 
 Example:
 $ %s tx gov generate-constitution-amendment path/to/updated/constitution.md
@@ -412,19 +415,35 @@ $ %s tx gov generate-constitution-amendment path/to/updated/constitution.md
 				return err
 			}
 
-			// Query the current constitution
 			clientCtx, err := client.GetClientTxContext(cmd)
 			if err != nil {
 				return err
 			}
-			queryClient := v1.NewQueryClient(clientCtx)
-			resp, err := queryClient.Constitution(cmd.Context(), &v1.QueryConstitutionRequest{})
+
+			var currentConstitution string
+			currentConstitutionPath, err := cmd.Flags().GetString(flagCurrentConstitution)
 			if err != nil {
 				return err
 			}
 
+			if currentConstitutionPath != "" {
+				// Read the current constitution from the provided file
+				currentConstitution, err = readFromMarkdownFile(currentConstitutionPath)
+				if err != nil {
+					return err
+				}
+			} else {
+				// Query the current constitution from the node
+				queryClient := v1.NewQueryClient(clientCtx)
+				resp, err := queryClient.Constitution(cmd.Context(), &v1.QueryConstitutionRequest{})
+				if err != nil {
+					return err
+				}
+				currentConstitution = resp.Constitution
+			}
+
 			// Generate the unified diff between the current and updated constitutions
-			diff, err := govutils.GenerateUnifiedDiff(resp.Constitution, updatedConstitution)
+			diff, err := govutils.GenerateUnifiedDiff(currentConstitution, updatedConstitution)
 			if err != nil {
 				return err
 			}
@@ -445,6 +464,9 @@ $ %s tx gov generate-constitution-amendment path/to/updated/constitution.md
 	if err != nil {
 		panic(err)
 	}
+	// add flag to pass input constitution file instead of querying node
+	// for the current constitution
+	cmd.Flags().String(flagCurrentConstitution, "", "Path to the current constitution markdown file (optional, if not provided, the current constitution will be queried from the node)")
 
 	return cmd
 }