feat: Add a -y flag to deploy/install

CHANGELOG.md

@@ -12,6 +12,10 @@ The command line interface for nns commands has been updated to:
 - Not offer --network as a flag given that it is unused
 - List nns subcommands
 
+### feat: -y flag for canister installation
+
+`dfx canister install` and `dfx deploy` now have a `-y` flag that will automatically confirm any y/n checks made during canister installation.
+
 ### fix: Compute Motoko dependencies in linear (not exponential) time by detecting visited imports.
 
 ### fix(generate): add missing typescript types and fix issues with bindings array in dfx.json

e2e/tests-dfx/install.bash

@@ -163,3 +163,11 @@ teardown() {
     assert_command dfx canister install e2e_project_backend --mode auto --upgrade-unchanged
     assert_command dfx canister call e2e_project_backend greet dfx
 }
+
+@test "-y skips compat check" {
+    dfx_start
+    assert_command dfx canister create e2e_project_backend
+    assert_command dfx build e2e_project_backend
+    assert_command dfx canister install e2e_project_backend
+    assert_command timeout -s9 20s dfx canister install e2e_project_backend --mode reinstall -y # if -y does not work, hangs without stdin
+}

src/dfx/src/commands/canister/install.rs

@@ -51,6 +51,11 @@ pub struct CanisterInstallOpts {
     /// Specifies a particular WASM file to install, bypassing the dfx.json project settings.
     #[clap(long, conflicts_with("all"))]
     wasm: Option<PathBuf>,
+
+    /// Skips yes/no checks by answering 'yes'. Such checks usually result in data loss,
+    /// so this is not recommended outside of CI.
+    #[clap(long, short)]
+    yes: bool,
 }
 
 pub async fn exec(
@@ -113,6 +118,7 @@ pub async fn exec(
                 call_sender,
                 fs::read(&wasm_path)
                     .with_context(|| format!("Unable to read {}", wasm_path.display()))?,
+                opts.yes,
             )
             .await
         } else {
@@ -132,6 +138,7 @@ pub async fn exec(
                 call_sender,
                 opts.upgrade_unchanged,
                 None,
+                opts.yes,
             )
             .await
         }
@@ -170,6 +177,7 @@ pub async fn exec(
                     call_sender,
                     opts.upgrade_unchanged,
                     None,
+                    opts.yes,
                 )
                 .await?;
             }

src/dfx/src/commands/deploy.rs

@@ -71,6 +71,11 @@ pub struct DeployOpts {
     /// Bypasses the Wallet canister.
     #[clap(long, conflicts_with("wallet"))]
     no_wallet: bool,
+
+    /// Skips yes/no checks by answering 'yes'. Such checks usually result in data loss,
+    /// so this is not recommended outside of CI.
+    #[clap(long, short)]
+    yes: bool,
 }
 
 pub fn exec(env: &dyn Environment, opts: DeployOpts) -> DfxResult {
@@ -129,6 +134,7 @@ pub fn exec(env: &dyn Environment, opts: DeployOpts) -> DfxResult {
         with_cycles,
         &call_sender,
         create_call_sender,
+        opts.yes,
     ))?;
 
     display_urls(&env)

src/dfx/src/lib/nns/install_nns.rs

@@ -680,6 +680,7 @@ pub async fn install_canister(
         timeout,
         &call_sender,
         fs::read(&wasm_path).with_context(|| format!("Unable to read {:?}", wasm_path))?,
+        true,
     )
     .await?;
 

src/dfx/src/lib/operations/canister/deploy_canisters.rs

@@ -32,6 +32,7 @@ pub async fn deploy_canisters(
     with_cycles: Option<&str>,
     call_sender: &CallSender,
     create_call_sender: &CallSender,
+    skip_consent: bool,
 ) -> DfxResult {
     let log = env.get_logger();
 
@@ -102,6 +103,7 @@ pub async fn deploy_canisters(
         timeout,
         call_sender,
         pool,
+        skip_consent,
     )
     .await?;
 
@@ -217,6 +219,7 @@ async fn install_canisters(
     timeout: Duration,
     call_sender: &CallSender,
     pool: CanisterPool,
+    skip_consent: bool,
 ) -> DfxResult {
     info!(env.get_logger(), "Installing canisters...");
 
@@ -254,6 +257,7 @@ async fn install_canisters(
             call_sender,
             upgrade_unchanged,
             Some(&pool),
+            skip_consent,
         )
         .await?;
     }

src/dfx/src/lib/operations/canister/install_canister.rs

@@ -42,6 +42,7 @@ pub async fn install_canister(
     call_sender: &CallSender,
     upgrade_unchanged: bool,
     pool: Option<&CanisterPool>,
+    skip_consent: bool,
 ) -> DfxResult {
     let log = env.get_logger();
     let network = env.get_network_descriptor();
@@ -67,7 +68,7 @@ pub async fn install_canister(
             InstallMode::Install
         }
     });
-    if matches!(mode, InstallMode::Reinstall | InstallMode::Upgrade) {
+    if !skip_consent && matches!(mode, InstallMode::Reinstall | InstallMode::Upgrade) {
         let candid = read_module_metadata(agent, canister_id, "candid:service").await;
         if let Some(candid) = &candid {
             match check_candid_compatibility(canister_info, candid) {
@@ -83,7 +84,7 @@ pub async fn install_canister(
             }
         }
     }
-    if canister_info.is_motoko() && matches!(mode, InstallMode::Upgrade) {
+    if !skip_consent && canister_info.is_motoko() && matches!(mode, InstallMode::Upgrade) {
         let stable_types = read_module_metadata(agent, canister_id, "motoko:stable-types").await;
         if let Some(stable_types) = &stable_types {
             match check_stable_compatibility(canister_info, env, stable_types) {
@@ -124,6 +125,7 @@ pub async fn install_canister(
             timeout,
             call_sender,
             wasm_module,
+            skip_consent,
         )
         .await?;
     }
@@ -357,10 +359,11 @@ pub async fn install_canister_wasm(
     timeout: Duration,
     call_sender: &CallSender,
     wasm_module: Vec<u8>,
+    skip_consent: bool,
 ) -> DfxResult {
     let log = env.get_logger();
     let mgr = ManagementCanister::create(agent);
-    if mode == InstallMode::Reinstall {
+    if !skip_consent && mode == InstallMode::Reinstall {
         let msg = if let Some(name) = canister_name {
             format!("You are about to reinstall the {name} canister")
         } else {