Add possibility to extract all packages with extractPackages

product/gradle-plugin/src/main/kotlin/PythonTasks.kt

@@ -323,7 +323,7 @@ internal class TaskBuilder(
                 File(fte.file.parent, fte.name + "c").exists()
             ) {
                 ! python.extractPackages.any {
-                    fte.path.replace("/", ".").startsWith(it + ".")
+                    it == "*" || fte.path.replace("/", ".").startsWith(it + ".")
                 }
             } else false
         }

product/gradle-plugin/src/test/integration/data/ExtractPackages/wildcard/app/build.gradle

@@ -0,0 +1,20 @@
+apply plugin: 'com.android.application'
+apply plugin: 'com.chaquo.python'
+
+android {
+    namespace "com.chaquo.python.test"
+    compileSdk 31
+    defaultConfig {
+        applicationId "com.chaquo.python.test"
+        minSdk 24
+        targetSdk 31
+        versionCode 1
+        versionName "0.0.1"
+        python {
+            extractPackages "pkg1", "*"
+        }
+        ndk {
+            abiFilters "x86"
+        }
+    }
+}

product/gradle-plugin/src/test/integration/test_gradle_plugin.py

@@ -193,7 +193,7 @@ def checkZip(self, zip_filename, files, *, pyc=False, extract_packages=[],
                 with self.subTest(f=f):
                     filename, attrs = f if isinstance(f, tuple) else (f, {})
                     if pyc and filename.endswith(".py"):
-                        if any(filename.startswith(ep.replace(".", "/") + "/")
+                        if any(ep == "*" or filename.startswith(ep.replace(".", "/") + "/")
                                for ep in extract_packages):
                             expected_files.append(filename)
                         filename += "c"
@@ -676,6 +676,19 @@ def test_variant_merge(self):
                        variants={"red-debug": dict(extract_packages=["common"]),
                                  "blue-debug": dict(extract_packages=["common", "blue"])})
 
+    def test_wildcard(self):
+        PY_FILES = [
+            "pkg1/__init__.py",
+            "pkg2/__init__.py",
+            "pkg3/__init__.py",
+            "pkg3/mod1.py",
+            "pkg3/sub_pkg/__init__.py",
+            "pkg3/sub_pkg/mod2.py",
+        ]
+        self.RunGradle("base", "ExtractPackages/wildcard",
+                       app=PY_FILES,
+                       extract_packages=["pkg1", "*"])
+
 
 class Pyc(GradleTestCase):
     FAILED = "Failed to compile to .pyc format: "

product/runtime/docs/sphinx/android.rst

@@ -405,8 +405,21 @@ can declare them like this::
         }
     }
 
-Each extracted file will slightly slow down your app's startup, so this setting should be
-used on the deepest possible package.
+The files are extracted when the package is imported for the first time. Each extracted
+file will slightly slow down your app's startup, so this setting should be used on the
+deepest possible package.
+
+For development purposes, it is sometimes useful to extract all packages. This is
+possible using a wildcard::
+
+    chaquopy {
+        defaultConfig {
+            extractPackages("*")
+        }
+    }
+
+If the wildcard is used, all packages are imported before your app's code starts
+running.
 
 .. _android-data:
 

product/runtime/docs/sphinx/changes/1424.feature.rst

@@ -0,0 +1 @@
+Added the wildcard `*` to :ref:`extractPackages` to extract all packages at startup.

product/runtime/src/main/python/java/android/importer.py

@@ -83,8 +83,9 @@ def hook(path):
                                                  .format(entry, type(finder).__name__))
 
         # Extract necessary files from the root directory. This includes .pth files,
-        # which will be read by addsitedir below.
-        finder.extract_dir("", recursive=False)
+        # which will be read by addsitedir below. If requested, also extract all Python
+        # packages.
+        finder.extract_dir("", recursive="*" in build_json["extract_packages"])
 
         # Extract necessary files from top-level directories which aren't Python
         # packages or dist-info directories.
@@ -531,8 +532,10 @@ def find_lib(self, filename):
 
     def extract_dir(self, zip_dir, recursive=True):
         dotted_dir = zip_dir.replace("/", ".")
-        extract_package = any((dotted_dir == ep) or dotted_dir.startswith(ep + ".")
-                              for ep in self.extract_packages)
+        extract_package = any(
+            ep in (dotted_dir, "*") or dotted_dir.startswith(ep + ".")
+            for ep in self.extract_packages
+        )
 
         for filename in self.listdir(zip_dir):
             zip_path = join(zip_dir, filename)