Fix when Rust app is a workspace

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.22.2] - 2024-07-25
+
+### Fixed
+
+- Rust app: get target directory from cargo metadata (workspace compatible)
+
 ## [1.22.1] - 2024-07-23
 
 ### Fixed

src/ragger/utils/misc.py

@@ -17,6 +17,8 @@
 from typing import Optional, Tuple, List
 from pathlib import Path
 from ragger.error import ExceptionRAPDU
+import subprocess
+import json
 
 ERROR_BOLOS_DEVICE_LOCKED = 0x5515
 ERROR_DENIED_BY_USER = 0x5501
@@ -69,10 +71,23 @@
         raise AssertionError(f"{base_dir} is not a directory")
     app = base_dir.resolve()
     if sdk.lower() == "rust":
+        """
+        When building a Rust app, the resulting binary is located in a target
+        directory target/<device>/release/<app_name>. app is the Path to the
+        build directory, where is stored the app's Cargo.toml file.
+        If the app repository is organized as a workspace crate (several packages,
+        each package in its own directory with its own Cargo.toml), the binaries are
+        all stored in the same target directory. 'cargo metadata' is used to get the
+        target directory full path.
+        """
         if device == "nanos2":
             device = "nanosplus"
         app_name = toml.load(base_dir / "Cargo.toml")["package"]["name"]
-        app = app / "target" / device / "release" / app_name
+        cmd = ["cargo", "metadata", "--no-deps"]
+        output = subprocess.check_output(cmd)
+        metadata = json.loads(output)
+        target = Path(metadata["target_directory"])
+        app = target / device / "release" / app_name
     else:
         app = app / "build" / device / "bin" / "app.elf"
     if not app.is_file():

tests/unit/utils/test_misc.py

@@ -1,4 +1,5 @@
 import os
+import subprocess
 from pathlib import Path
 from unittest import TestCase
 from unittest.mock import MagicMock, patch
@@ -40,13 +41,16 @@ def test_find_application_ok_c(self):
     def test_find_application_ok_rust(self):
         device, sdk, appname = "device", "rust", "rustapp"
         with temporary_directory() as dir_path:
-            tmp_dir = (dir_path / "target" / device / "release")
+            os.chdir(dir_path)
+            cmd = ["cargo", "new", appname]
+            subprocess.check_output(cmd)
+            app_path = dir_path / appname
+            os.chdir(app_path)
+            tmp_dir = (app_path / "target" / device / "release")
             tmp_dir.mkdir(parents=True, exist_ok=True)
             expected = tmp_dir / appname
             expected.touch()
-            with patch("ragger.utils.misc.toml") as toml_patch:
-                toml_patch.load.return_value = {"package": {"name": appname}}
-                result = misc.find_application(dir_path, device, sdk)
+            result = misc.find_application(app_path, device, sdk)
             self.assertEqual(result, expected)
 
     def test_find_application_nok_not_dir(self):