Read install arg from file

e2e/tests-dfx/install.bash

@@ -182,7 +182,17 @@ teardown() {
   assert_contains db07e7e24f6f8ddf53c33a610713259a7c1eb71c270b819ebd311e2d223267f0
 }
 
+@test "installing one canister with an argument succeeds" {
+  assert_command dfx canister install e2e_project_backend --argument '()'
+}
+
+@test "installing with an argument in a file succeeds" {
+  TMPFILE="$(mktemp)"
+  echo '()' >"$TMPFILE"
+  assert_command dfx canister install e2e_project_backend --argument-file "$TMPFILE"
+}
+
 @test "installing multiple canisters with arguments fails" {
-  assert_command_fail dfx canister install --all --argument hello
+  assert_command_fail dfx canister install --all --argument '()'
   assert_contains "error: the argument '--all' cannot be used with '--argument <ARGUMENT>'"
-}
+}

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

@@ -40,9 +40,17 @@ pub struct CanisterInstallOpts {
     upgrade_unchanged: bool,
 
     /// Specifies the argument to pass to the method.
-    #[arg(long)]
+    #[arg(long, conflicts_with("argument_file"))]
     argument: Option<String>,
 
+    /// Specifies the file from which to read the argument to pass to the method.
+    #[arg(
+        long,
+        value_parser = file_or_stdin_parser,
+        conflicts_with("argument")
+    )]
+    argument_file: Option<PathBuf>,
+
     /// Specifies the data type for the argument when making the call using an argument.
     #[arg(long, requires("argument"), value_parser = ["idl", "raw"])]
     argument_type: Option<String>,
@@ -107,7 +115,14 @@ pub async fn exec(
 
         let canister_id =
             Principal::from_text(canister).or_else(|_| canister_id_store.get(canister))?;
+
+        let arguments_from_file = opts
+            .argument_file
+            .map(|v| arguments_from_file(&v))
+            .transpose()?;
         let arguments = opts.argument.as_deref();
+        let arguments = arguments_from_file.as_deref().or(arguments);
+
         let arg_type = opts.argument_type.as_deref();
         let canister_info = config.as_ref()
             .ok_or_else(|| anyhow!("Cannot find dfx configuration file in the current working directory. Did you forget to create one?"))