Fix option --is-view env var

cmd/soroban-cli/src/commands/contract/invoke.rs

@@ -42,8 +42,8 @@ pub struct Cmd {
     // For testing only
     #[arg(skip)]
     pub wasm: Option<std::path::PathBuf>,
-    /// Do not sign and submit transaction
-    #[arg(long, env = "SOROBAN_INVOKE_SIGN", env = "SYSTEM_TEST_VERBOSE_OUTPUT")]
+    /// View the result simulating and do not sign and submit transaction
+    #[arg(long, env = "SOROBAN_INVOKE_VIEW")]
     pub is_view: bool,
     /// Function name as subcommand, then arguments for that function as `--arg-name value`
     #[arg(last = true, id = "CONTRACT_FN_AND_ARGS")]
@@ -148,6 +148,14 @@ impl From<Infallible> for Error {
 }
 
 impl Cmd {
+    fn is_view(&self) -> bool {
+        self.is_view ||
+            // TODO: Remove at next major release. Was added to retain backwards
+            // compatibility when this env var used to be used for the --is-view
+            // option.
+            std::env::var("SYSTEM_TEST_VERBOSE_OUTPUT").as_deref() == Ok("true")
+    }
+
     fn build_host_function_parameters(
         &self,
         contract_id: [u8; 32],
@@ -328,7 +336,7 @@ impl NetworkRunnable for Cmd {
         )?;
         let txn = client.create_assembled_transaction(&tx).await?;
         let txn = self.fee.apply_to_assembled_txn(txn);
-        let (return_value, events) = if self.is_view {
+        let (return_value, events) = if self.is_view() {
             (
                 txn.sim_response().results()?[0].xdr.clone(),
                 txn.sim_response().events()?,

docs/soroban-cli-full-docs.md

@@ -953,7 +953,7 @@ soroban contract invoke ... -- --help
 ###### **Options:**
 
 * `--id <CONTRACT_ID>` — Contract ID to invoke
-* `--is-view` — Do not sign and submit transaction
+* `--is-view` — View the result simulating and do not sign and submit transaction
 
   Possible values: `true`, `false`