Move the error handling to 'fetch_root_key_if_needed'.

src/dfx/src/commands/deploy.rs

@@ -162,9 +162,7 @@ pub fn exec(env: &dyn Environment, opts: DeployOpts) -> DfxResult {
     let call_sender = CallSender::from(&opts.wallet, env.get_network_descriptor())
         .map_err(|e| anyhow!("Failed to determine call sender: {}", e))?;
 
-    // This is where we try to talk to replica first.
-    runtime.block_on(fetch_root_key_if_needed(&env))
-        .map_err(|e| anyhow!("Failed to fetch the root key, did you run 'dfx start' to start the local replica?\n{}", e))?;
+    runtime.block_on(fetch_root_key_if_needed(&env))?;
 
     runtime.block_on(deploy_canisters(
         &env,

src/dfx/src/lib/root_key.rs

@@ -1,11 +1,12 @@
 use crate::{lib::error::DfxResult, Environment};
-
+use anyhow::anyhow;
 use dfx_core::network::root_key;
 
 pub async fn fetch_root_key_if_needed(env: &dyn Environment) -> DfxResult {
     let agent = env.get_agent();
     let network = env.get_network_descriptor();
-    root_key::fetch_root_key_when_non_mainnet(agent, network).await?;
+    root_key::fetch_root_key_when_non_mainnet(agent, network).await
+        .map_err(|e| anyhow!("Failed to fetch the root key, did you run 'dfx start' to start the local replica?\n{}", e))?;
     Ok(())
 }