Add support to build AppImages on ARM

changes/1564.feature.rst

@@ -0,0 +1 @@
+AppImages can now be built for the ARM architecture.

docs/reference/platforms/index.rst

@@ -64,7 +64,7 @@ Platform support
 +---------+-----------------+--------+-------+-----+--------+-------+-----+--------+-----+-------+
 | iOS     | |iOS|_          | |f|    | |y|   |     |        |       |     |        |     |       |
 +---------+-----------------+--------+-------+-----+--------+-------+-----+--------+-----+-------+
-| Linux   | |AppImage|_     | |v|    |       |     |        |       | |v| | |v|    |     |       |
+| Linux   | |AppImage|_     | |v|    | |v|   |     |        |       | |v| | |v|    | |v| | |v|   |
 +         +-----------------+--------+-------+-----+--------+-------+-----+--------+-----+-------+
 |         | |Flatpak|_      |        |       |     |        |       | |v| | |f|    | |v| | |v|   |
 +         +-----------------+--------+-------+-----+--------+-------+-----+--------+-----+-------+

docs/reference/platforms/linux/appimage.rst

@@ -9,7 +9,7 @@ AppImage
 +--------+-------+-----+--------+-------+-----+--------+-----+-------+
 | x86‑64 | arm64 | x86 | x86‑64 | arm64 | x86 | x86‑64 | arm | arm64 |
 +========+=======+=====+========+=======+=====+========+=====+=======+
-| |v|    |       |     |        |       | |v| | |v|    |     |       |
+| |v|    | |v|   |     |        |       | |v| | |v|    | |v| | |v|   |
 +--------+-------+-----+--------+-------+-----+--------+-----+-------+
 
 .. admonition:: Best effort support

src/briefcase/bootstraps/pursuedpybear.py

@@ -121,7 +121,7 @@ def pyproject_table_linux_system_arch(self):
 
     def pyproject_table_linux_appimage(self):
         return """
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
 # ?? FIXME

src/briefcase/bootstraps/pygame.py

@@ -122,7 +122,7 @@ def pyproject_table_linux_system_arch(self):
 
     def pyproject_table_linux_appimage(self):
         return """
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
 ]

src/briefcase/bootstraps/toga.py

@@ -158,7 +158,7 @@ def pyproject_table_linux_system_arch(self):
 
     def pyproject_table_linux_appimage(self):
         return """
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
     # Needed to compile pycairo wheel

src/briefcase/integrations/linuxdeploy.py

@@ -56,6 +56,9 @@ def arch(cls, host_arch: str) -> str:
             return {
                 "x86_64": "x86_64",
                 "i686": "i386",
+                "armv7l": "armhf",
+                "armv8l": "armhf",
+                "aarch64": "aarch64",
             }[host_arch]
         except KeyError as e:
             raise UnsupportedHostError(

src/briefcase/platforms/linux/appimage.py

@@ -175,13 +175,21 @@ class LinuxAppImageCreateCommand(
     def output_format_template_context(self, app: AppConfig):
         context = super().output_format_template_context(app)
 
-        # Add the manylinux tag to the template context.
         try:
-            tag = getattr(app, "manylinux_image_tag", "latest")
             manylinux_arch = {
                 "x86_64": "x86_64",
                 "i386": "i686",
+                "aarch64": "aarch64",
             }[LinuxDeploy.arch(self.tools.host_arch)]
+        except KeyError:
+            manylinux_arch = "unknown"
+            self.logger.warning(
+                f"There is not a manylinux base image for {self.tools.host_arch}"
+            )
+
+        # Add the manylinux tag to the template context.
+        try:
+            tag = getattr(app, "manylinux_image_tag", "latest")
             context["manylinux_image"] = f"{app.manylinux}_{manylinux_arch}:{tag}"
             if app.manylinux in {"manylinux1", "manylinux2010", "manylinux2014"}:
                 context["vendor_base"] = "centos"

tests/commands/new/test_build_context.py

@@ -198,7 +198,7 @@ def main():
 ]
 """,
         pyproject_table_linux_appimage="""
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
     # Needed to compile pycairo wheel
@@ -578,7 +578,7 @@ def main():
 ]
 """,
         pyproject_table_linux_appimage="""
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
 # ?? FIXME
@@ -748,7 +748,7 @@ def main():
 ]
 """,
         pyproject_table_linux_appimage="""
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
 ]
@@ -1178,7 +1178,7 @@ def main():
 ]
 """,
         pyproject_table_linux_appimage="""
-manylinux = "manylinux2014"
+manylinux = "manylinux_2_28"
 
 system_requires = [
     # Needed to compile pycairo wheel

tests/integrations/linuxdeploy/test_LinuxDeploy__properties.py

@@ -23,6 +23,9 @@ def test_file_path(linuxdeploy, mock_tools):
     [
         ("Linux", "x86_64", "x86_64"),
         ("Linux", "i686", "i386"),
+        ("Linux", "aarch64", "aarch64"),
+        ("Linux", "armv7l", "armhf"),
+        ("Linux", "armv8l", "armhf"),
         ("Darwin", "x86_64", "x86_64"),
     ],
 )

tests/platforms/linux/appimage/test_create.py

@@ -175,6 +175,32 @@ def test_finalize_nodocker(create_command, first_app_config, capsys):
                 "use_non_root_user": True,
             },
         ),
+        # Linux on aarch64 hardware
+        (
+            "manylinux_2_28",
+            None,
+            "Linux",
+            "aarch64",
+            False,
+            {
+                "manylinux_image": "manylinux_2_28_aarch64:latest",
+                "vendor_base": "almalinux",
+                "use_non_root_user": True,
+            },
+        ),
+        # Linux on arm hardware
+        (
+            "manylinux_2_28",
+            None,
+            "Linux",
+            "armv7l",
+            False,
+            {
+                "manylinux_image": "manylinux_2_28_unknown:latest",
+                "vendor_base": "almalinux",
+                "use_non_root_user": True,
+            },
+        ),
         # macOS on x86_64
         (
             "manylinux2014",